drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #include "iwl-3945-core.h"
  50 #include "iwl-commands.h"
  51 #include "iwl-3945-commands.h"
  52 #include "iwl-3945.h"
  53 #include "iwl-3945-fh.h"
  54 #include "iwl-helpers.h"
  55
  56 #ifdef CONFIG_IWL3945_DEBUG
  57 u32 iwl3945_debug_level;
  58 #endif
  59
  60 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  61                                   struct iwl3945_tx_queue *txq);
  62
  63 /******************************************************************************
  64  *
  65  * module boiler plate
  66  *
  67  ******************************************************************************/
  68
  69 /* module parameters */
  70 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  71 static u32 iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  72 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  73 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  74 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  75 int iwl3945_param_queues_num = IWL39_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  76
  77 /*
  78  * module name, copyright, version, etc.
  79  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  80  */
  81
  82 #define DRV_DESCRIPTION \
  83 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  84
  85 #ifdef CONFIG_IWL3945_DEBUG
  86 #define VD "d"
  87 #else
  88 #define VD
  89 #endif
  90
  91 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  92 #define VS "s"
  93 #else
  94 #define VS
  95 #endif
  96
  97 #define IWLWIFI_VERSION "1.2.26k" VD VS
  98 #define DRV_COPYRIGHT   "Copyright(c) 2003-2008 Intel Corporation"
  99 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
 100 #define DRV_VERSION     IWLWIFI_VERSION
 101
 102
 103 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 104 MODULE_VERSION(DRV_VERSION);
 105 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
 106 MODULE_LICENSE("GPL");
 107
 108 static const struct ieee80211_supported_band *iwl3945_get_band(
 109                 struct iwl3945_priv *priv, enum ieee80211_band band)
 110 {
 111         return priv->hw->wiphy->bands[band];
 112 }
 113
 114 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 115  * DMA services
 116  *
 117  * Theory of operation
 118  *
 119  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 120  * of buffer descriptors, each of which points to one or more data buffers for
 121  * the device to read from or fill.  Driver and device exchange status of each
 122  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 123  * entries in each circular buffer, to protect against confusing empty and full
 124  * queue states.
 125  *
 126  * The device reads or writes the data in the queues via the device's several
 127  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 128  *
 129  * For Tx queue, there are low mark and high mark limits. If, after queuing
 130  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 131  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 132  * Tx queue resumed.
 133  *
 134  * The 3945 operates with six queues:  One receive queue, one transmit queue
 135  * (#4) for sending commands to the device firmware, and four transmit queues
 136  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 137  ***************************************************/
 138
 139 int iwl3945_queue_space(const struct iwl3945_queue *q)
 140 {
 141         int s = q->read_ptr - q->write_ptr;
 142
 143         if (q->read_ptr > q->write_ptr)
 144                 s -= q->n_bd;
 145
 146         if (s <= 0)
 147                 s += q->n_window;
 148         /* keep some reserve to not confuse empty and full situations */
 149         s -= 2;
 150         if (s < 0)
 151                 s = 0;
 152         return s;
 153 }
 154
 155 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 156 {
 157         return q->write_ptr > q->read_ptr ?
 158                 (i >= q->read_ptr && i < q->write_ptr) :
 159                 !(i < q->read_ptr && i >= q->write_ptr);
 160 }
 161
 162
 163 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 164 {
 165         /* This is for scan command, the big buffer at end of command array */
 166         if (is_huge)
 167                 return q->n_window;     /* must be power of 2 */
 168
 169         /* Otherwise, use normal size buffers */
 170         return index & (q->n_window - 1);
 171 }
 172
 173 /**
 174  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 175  */
 176 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 177                           int count, int slots_num, u32 id)
 178 {
 179         q->n_bd = count;
 180         q->n_window = slots_num;
 181         q->id = id;
 182
 183         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 184          * and iwl_queue_dec_wrap are broken. */
 185         BUG_ON(!is_power_of_2(count));
 186
 187         /* slots_num must be power-of-two size, otherwise
 188          * get_cmd_index is broken. */
 189         BUG_ON(!is_power_of_2(slots_num));
 190
 191         q->low_mark = q->n_window / 4;
 192         if (q->low_mark < 4)
 193                 q->low_mark = 4;
 194
 195         q->high_mark = q->n_window / 8;
 196         if (q->high_mark < 2)
 197                 q->high_mark = 2;
 198
 199         q->write_ptr = q->read_ptr = 0;
 200
 201         return 0;
 202 }
 203
 204 /**
 205  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 206  */
 207 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 208                               struct iwl3945_tx_queue *txq, u32 id)
 209 {
 210         struct pci_dev *dev = priv->pci_dev;
 211
 212         /* Driver private data, only for Tx (not command) queues,
 213          * not shared with device. */
 214         if (id != IWL_CMD_QUEUE_NUM) {
 215                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 216                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 217                 if (!txq->txb) {
 218                         IWL_ERROR("kmalloc for auxiliary BD "
 219                                   "structures failed\n");
 220                         goto error;
 221                 }
 222         } else
 223                 txq->txb = NULL;
 224
 225         /* Circular buffer of transmit frame descriptors (TFDs),
 226          * shared with device */
 227         txq->bd = pci_alloc_consistent(dev,
 228                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 229                         &txq->q.dma_addr);
 230
 231         if (!txq->bd) {
 232                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 233                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 234                 goto error;
 235         }
 236         txq->q.id = id;
 237
 238         return 0;
 239
 240  error:
 241         kfree(txq->txb);
 242         txq->txb = NULL;
 243
 244         return -ENOMEM;
 245 }
 246
 247 /**
 248  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 249  */
 250 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 251                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 252 {
 253         struct pci_dev *dev = priv->pci_dev;
 254         int len;
 255         int rc = 0;
 256
 257         /*
 258          * Alloc buffer array for commands (Tx or other types of commands).
 259          * For the command queue (#4), allocate command space + one big
 260          * command for scan, since scan command is very huge; the system will
 261          * not have two scans at the same time, so only one is needed.
 262          * For data Tx queues (all other queues), no super-size command
 263          * space is needed.
 264          */
 265         len = sizeof(struct iwl3945_cmd) * slots_num;
 266         if (txq_id == IWL_CMD_QUEUE_NUM)
 267                 len +=  IWL_MAX_SCAN_SIZE;
 268         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 269         if (!txq->cmd)
 270                 return -ENOMEM;
 271
 272         /* Alloc driver data array and TFD circular buffer */
 273         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 274         if (rc) {
 275                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 276
 277                 return -ENOMEM;
 278         }
 279         txq->need_update = 0;
 280
 281         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 282          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 283         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 284
 285         /* Initialize queue high/low-water, head/tail indexes */
 286         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 287
 288         /* Tell device where to find queue, enable DMA channel. */
 289         iwl3945_hw_tx_queue_init(priv, txq);
 290
 291         return 0;
 292 }
 293
 294 /**
 295  * iwl3945_tx_queue_free - Deallocate DMA queue.
 296  * @txq: Transmit queue to deallocate.
 297  *
 298  * Empty queue by removing and destroying all BD's.
 299  * Free all buffers.
 300  * 0-fill, but do not free "txq" descriptor structure.
 301  */
 302 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 303 {
 304         struct iwl3945_queue *q = &txq->q;
 305         struct pci_dev *dev = priv->pci_dev;
 306         int len;
 307
 308         if (q->n_bd == 0)
 309                 return;
 310
 311         /* first, empty all BD's */
 312         for (; q->write_ptr != q->read_ptr;
 313              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 314                 iwl3945_hw_txq_free_tfd(priv, txq);
 315
 316         len = sizeof(struct iwl3945_cmd) * q->n_window;
 317         if (q->id == IWL_CMD_QUEUE_NUM)
 318                 len += IWL_MAX_SCAN_SIZE;
 319
 320         /* De-alloc array of command/tx buffers */
 321         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 322
 323         /* De-alloc circular buffer of TFDs */
 324         if (txq->q.n_bd)
 325                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 326                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 327
 328         /* De-alloc array of per-TFD driver data */
 329         kfree(txq->txb);
 330         txq->txb = NULL;
 331
 332         /* 0-fill queue descriptor structure */
 333         memset(txq, 0, sizeof(*txq));
 334 }
 335
 336 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 337
 338 /*************** STATION TABLE MANAGEMENT ****
 339  * mac80211 should be examined to determine if sta_info is duplicating
 340  * the functionality provided here
 341  */
 342
 343 /**************************************************************/
 344 #if 0 /* temporary disable till we add real remove station */
 345 /**
 346  * iwl3945_remove_station - Remove driver's knowledge of station.
 347  *
 348  * NOTE:  This does not remove station from device's station table.
 349  */
 350 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 351 {
 352         int index = IWL_INVALID_STATION;
 353         int i;
 354         unsigned long flags;
 355
 356         spin_lock_irqsave(&priv->sta_lock, flags);
 357
 358         if (is_ap)
 359                 index = IWL_AP_ID;
 360         else if (is_broadcast_ether_addr(addr))
 361                 index = priv->hw_setting.bcast_sta_id;
 362         else
 363                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 364                         if (priv->stations[i].used &&
 365                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 366                                                 addr)) {
 367                                 index = i;
 368                                 break;
 369                         }
 370
 371         if (unlikely(index == IWL_INVALID_STATION))
 372                 goto out;
 373
 374         if (priv->stations[index].used) {
 375                 priv->stations[index].used = 0;
 376                 priv->num_stations--;
 377         }
 378
 379         BUG_ON(priv->num_stations < 0);
 380
 381 out:
 382         spin_unlock_irqrestore(&priv->sta_lock, flags);
 383         return 0;
 384 }
 385 #endif
 386
 387 /**
 388  * iwl3945_clear_stations_table - Clear the driver's station table
 389  *
 390  * NOTE:  This does not clear or otherwise alter the device's station table.
 391  */
 392 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 393 {
 394         unsigned long flags;
 395
 396         spin_lock_irqsave(&priv->sta_lock, flags);
 397
 398         priv->num_stations = 0;
 399         memset(priv->stations, 0, sizeof(priv->stations));
 400
 401         spin_unlock_irqrestore(&priv->sta_lock, flags);
 402 }
 403
 404 /**
 405  * iwl3945_add_station - Add station to station tables in driver and device
 406  */
 407 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 408 {
 409         int i;
 410         int index = IWL_INVALID_STATION;
 411         struct iwl3945_station_entry *station;
 412         unsigned long flags_spin;
 413         u8 rate;
 414
 415         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 416         if (is_ap)
 417                 index = IWL_AP_ID;
 418         else if (is_broadcast_ether_addr(addr))
 419                 index = priv->hw_setting.bcast_sta_id;
 420         else
 421                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 422                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 423                                                 addr)) {
 424                                 index = i;
 425                                 break;
 426                         }
 427
 428                         if (!priv->stations[i].used &&
 429                             index == IWL_INVALID_STATION)
 430                                 index = i;
 431                 }
 432
 433         /* These two conditions has the same outcome but keep them separate
 434           since they have different meaning */
 435         if (unlikely(index == IWL_INVALID_STATION)) {
 436                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 437                 return index;
 438         }
 439
 440         if (priv->stations[index].used &&
 441            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 442                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 443                 return index;
 444         }
 445
 446         IWL_DEBUG_ASSOC("Add STA ID %d: %pM\n", index, addr);
 447         station = &priv->stations[index];
 448         station->used = 1;
 449         priv->num_stations++;
 450
 451         /* Set up the REPLY_ADD_STA command to send to device */
 452         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 453         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 454         station->sta.mode = 0;
 455         station->sta.sta.sta_id = index;
 456         station->sta.station_flags = 0;
 457
 458         if (priv->band == IEEE80211_BAND_5GHZ)
 459                 rate = IWL_RATE_6M_PLCP;
 460         else
 461                 rate =  IWL_RATE_1M_PLCP;
 462
 463         /* Turn on both antennas for the station... */
 464         station->sta.rate_n_flags =
 465                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 466
 467         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 468
 469         /* Add station to device's station table */
 470         iwl3945_send_add_station(priv, &station->sta, flags);
 471         return index;
 472
 473 }
 474
 475 /*************** DRIVER STATUS FUNCTIONS   *****/
 476
 477 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 478 {
 479         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 480          * set but EXIT_PENDING is not */
 481         return test_bit(STATUS_READY, &priv->status) &&
 482                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 483                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 484 }
 485
 486 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 487 {
 488         return test_bit(STATUS_ALIVE, &priv->status);
 489 }
 490
 491 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 492 {
 493         return test_bit(STATUS_INIT, &priv->status);
 494 }
 495
 496 static inline int iwl3945_is_rfkill_sw(struct iwl3945_priv *priv)
 497 {
 498         return test_bit(STATUS_RF_KILL_SW, &priv->status);
 499 }
 500
 501 static inline int iwl3945_is_rfkill_hw(struct iwl3945_priv *priv)
 502 {
 503         return test_bit(STATUS_RF_KILL_HW, &priv->status);
 504 }
 505
 506 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 507 {
 508         return iwl3945_is_rfkill_hw(priv) ||
 509                 iwl3945_is_rfkill_sw(priv);
 510 }
 511
 512 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 513 {
 514
 515         if (iwl3945_is_rfkill(priv))
 516                 return 0;
 517
 518         return iwl3945_is_ready(priv);
 519 }
 520
 521 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 522
 523 #define IWL_CMD(x) case x: return #x
 524
 525 static const char *get_cmd_string(u8 cmd)
 526 {
 527         switch (cmd) {
 528                 IWL_CMD(REPLY_ALIVE);
 529                 IWL_CMD(REPLY_ERROR);
 530                 IWL_CMD(REPLY_RXON);
 531                 IWL_CMD(REPLY_RXON_ASSOC);
 532                 IWL_CMD(REPLY_QOS_PARAM);
 533                 IWL_CMD(REPLY_RXON_TIMING);
 534                 IWL_CMD(REPLY_ADD_STA);
 535                 IWL_CMD(REPLY_REMOVE_STA);
 536                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 537                 IWL_CMD(REPLY_3945_RX);
 538                 IWL_CMD(REPLY_TX);
 539                 IWL_CMD(REPLY_RATE_SCALE);
 540                 IWL_CMD(REPLY_LEDS_CMD);
 541                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 542                 IWL_CMD(RADAR_NOTIFICATION);
 543                 IWL_CMD(REPLY_QUIET_CMD);
 544                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 545                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 546                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 547                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 548                 IWL_CMD(POWER_TABLE_CMD);
 549                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 550                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 551                 IWL_CMD(REPLY_SCAN_CMD);
 552                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 553                 IWL_CMD(SCAN_START_NOTIFICATION);
 554                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 555                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 556                 IWL_CMD(BEACON_NOTIFICATION);
 557                 IWL_CMD(REPLY_TX_BEACON);
 558                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 559                 IWL_CMD(QUIET_NOTIFICATION);
 560                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 561                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 562                 IWL_CMD(REPLY_BT_CONFIG);
 563                 IWL_CMD(REPLY_STATISTICS_CMD);
 564                 IWL_CMD(STATISTICS_NOTIFICATION);
 565                 IWL_CMD(REPLY_CARD_STATE_CMD);
 566                 IWL_CMD(CARD_STATE_NOTIFICATION);
 567                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 568         default:
 569                 return "UNKNOWN";
 570
 571         }
 572 }
 573
 574 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 575
 576 /**
 577  * iwl3945_enqueue_hcmd - enqueue a uCode command
 578  * @priv: device private data point
 579  * @cmd: a point to the ucode command structure
 580  *
 581  * The function returns < 0 values to indicate the operation is
 582  * failed. On success, it turns the index (> 0) of command in the
 583  * command queue.
 584  */
 585 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 586 {
 587         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 588         struct iwl3945_queue *q = &txq->q;
 589         struct iwl3945_tfd_frame *tfd;
 590         u32 *control_flags;
 591         struct iwl3945_cmd *out_cmd;
 592         u32 idx;
 593         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 594         dma_addr_t phys_addr;
 595         int pad;
 596         u16 count;
 597         int ret;
 598         unsigned long flags;
 599
 600         /* If any of the command structures end up being larger than
 601          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 602          * we will need to increase the size of the TFD entries */
 603         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 604                !(cmd->meta.flags & CMD_SIZE_HUGE));
 605
 606
 607         if (iwl3945_is_rfkill(priv)) {
 608                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 609                 return -EIO;
 610         }
 611
 612         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 613                 IWL_ERROR("No space for Tx\n");
 614                 return -ENOSPC;
 615         }
 616
 617         spin_lock_irqsave(&priv->hcmd_lock, flags);
 618
 619         tfd = &txq->bd[q->write_ptr];
 620         memset(tfd, 0, sizeof(*tfd));
 621
 622         control_flags = (u32 *) tfd;
 623
 624         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 625         out_cmd = &txq->cmd[idx];
 626
 627         out_cmd->hdr.cmd = cmd->id;
 628         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 629         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 630
 631         /* At this point, the out_cmd now has all of the incoming cmd
 632          * information */
 633
 634         out_cmd->hdr.flags = 0;
 635         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 636                         INDEX_TO_SEQ(q->write_ptr));
 637         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 638                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
 639
 640         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 641                         offsetof(struct iwl3945_cmd, hdr);
 642         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 643
 644         pad = U32_PAD(cmd->len);
 645         count = TFD_CTL_COUNT_GET(*control_flags);
 646         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 647
 648         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 649                      "%d bytes at %d[%d]:%d\n",
 650                      get_cmd_string(out_cmd->hdr.cmd),
 651                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 652                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 653
 654         txq->need_update = 1;
 655
 656         /* Increment and update queue's write index */
 657         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 658         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 659
 660         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 661         return ret ? ret : idx;
 662 }
 663
 664 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 665 {
 666         int ret;
 667
 668         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 669
 670         /* An asynchronous command can not expect an SKB to be set. */
 671         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 672
 673         /* An asynchronous command MUST have a callback. */
 674         BUG_ON(!cmd->meta.u.callback);
 675
 676         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 677                 return -EBUSY;
 678
 679         ret = iwl3945_enqueue_hcmd(priv, cmd);
 680         if (ret < 0) {
 681                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 682                           get_cmd_string(cmd->id), ret);
 683                 return ret;
 684         }
 685         return 0;
 686 }
 687
 688 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 689 {
 690         int cmd_idx;
 691         int ret;
 692
 693         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 694
 695          /* A synchronous command can not have a callback set. */
 696         BUG_ON(cmd->meta.u.callback != NULL);
 697
 698         if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
 699                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 700                           get_cmd_string(cmd->id));
 701                 ret = -EBUSY;
 702                 goto out;
 703         }
 704
 705         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 706
 707         if (cmd->meta.flags & CMD_WANT_SKB)
 708                 cmd->meta.source = &cmd->meta;
 709
 710         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 711         if (cmd_idx < 0) {
 712                 ret = cmd_idx;
 713                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 714                           get_cmd_string(cmd->id), ret);
 715                 goto out;
 716         }
 717
 718         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 719                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 720                         HOST_COMPLETE_TIMEOUT);
 721         if (!ret) {
 722                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 723                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 724                                   get_cmd_string(cmd->id),
 725                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 726
 727                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 728                         ret = -ETIMEDOUT;
 729                         goto cancel;
 730                 }
 731         }
 732
 733         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 734                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 735                                get_cmd_string(cmd->id));
 736                 ret = -ECANCELED;
 737                 goto fail;
 738         }
 739         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 740                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 741                                get_cmd_string(cmd->id));
 742                 ret = -EIO;
 743                 goto fail;
 744         }
 745         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 746                 IWL_ERROR("Error: Response NULL in '%s'\n",
 747                           get_cmd_string(cmd->id));
 748                 ret = -EIO;
 749                 goto cancel;
 750         }
 751
 752         ret = 0;
 753         goto out;
 754
 755 cancel:
 756         if (cmd->meta.flags & CMD_WANT_SKB) {
 757                 struct iwl3945_cmd *qcmd;
 758
 759                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 760                  * TX cmd queue. Otherwise in case the cmd comes
 761                  * in later, it will possibly set an invalid
 762                  * address (cmd->meta.source). */
 763                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 764                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 765         }
 766 fail:
 767         if (cmd->meta.u.skb) {
 768                 dev_kfree_skb_any(cmd->meta.u.skb);
 769                 cmd->meta.u.skb = NULL;
 770         }
 771 out:
 772         clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
 773         return ret;
 774 }
 775
 776 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 777 {
 778         if (cmd->meta.flags & CMD_ASYNC)
 779                 return iwl3945_send_cmd_async(priv, cmd);
 780
 781         return iwl3945_send_cmd_sync(priv, cmd);
 782 }
 783
 784 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 785 {
 786         struct iwl3945_host_cmd cmd = {
 787                 .id = id,
 788                 .len = len,
 789                 .data = data,
 790         };
 791
 792         return iwl3945_send_cmd_sync(priv, &cmd);
 793 }
 794
 795 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 796 {
 797         struct iwl3945_host_cmd cmd = {
 798                 .id = id,
 799                 .len = sizeof(val),
 800                 .data = &val,
 801         };
 802
 803         return iwl3945_send_cmd_sync(priv, &cmd);
 804 }
 805
 806 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 807 {
 808         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 809 }
 810
 811 /**
 812  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 813  * @band: 2.4 or 5 GHz band
 814  * @channel: Any channel valid for the requested band
 815
 816  * In addition to setting the staging RXON, priv->band is also set.
 817  *
 818  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 819  * in the staging RXON flag structure based on the band
 820  */
 821 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 822                                     enum ieee80211_band band,
 823                                     u16 channel)
 824 {
 825         if (!iwl3945_get_channel_info(priv, band, channel)) {
 826                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 827                                channel, band);
 828                 return -EINVAL;
 829         }
 830
 831         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 832             (priv->band == band))
 833                 return 0;
 834
 835         priv->staging_rxon.channel = cpu_to_le16(channel);
 836         if (band == IEEE80211_BAND_5GHZ)
 837                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 838         else
 839                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 840
 841         priv->band = band;
 842
 843         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 844
 845         return 0;
 846 }
 847
 848 /**
 849  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 850  *
 851  * NOTE:  This is really only useful during development and can eventually
 852  * be #ifdef'd out once the driver is stable and folks aren't actively
 853  * making changes
 854  */
 855 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 856 {
 857         int error = 0;
 858         int counter = 1;
 859
 860         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 861                 error |= le32_to_cpu(rxon->flags &
 862                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 863                                  RXON_FLG_RADAR_DETECT_MSK));
 864                 if (error)
 865                         IWL_WARNING("check 24G fields %d | %d\n",
 866                                     counter++, error);
 867         } else {
 868                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 869                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 870                 if (error)
 871                         IWL_WARNING("check 52 fields %d | %d\n",
 872                                     counter++, error);
 873                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 874                 if (error)
 875                         IWL_WARNING("check 52 CCK %d | %d\n",
 876                                     counter++, error);
 877         }
 878         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 879         if (error)
 880                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 881
 882         /* make sure basic rates 6Mbps and 1Mbps are supported */
 883         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 884                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 885         if (error)
 886                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 887
 888         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 889         if (error)
 890                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 891
 892         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 893                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 894         if (error)
 895                 IWL_WARNING("check CCK and short slot %d | %d\n",
 896                             counter++, error);
 897
 898         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 899                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 900         if (error)
 901                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 902                             counter++, error);
 903
 904         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 905                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 906         if (error)
 907                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 908                             counter++, error);
 909
 910         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 911                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 912                                 RXON_FLG_ANT_A_MSK)) == 0);
 913         if (error)
 914                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 915
 916         if (error)
 917                 IWL_WARNING("Tuning to channel %d\n",
 918                             le16_to_cpu(rxon->channel));
 919
 920         if (error) {
 921                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 922                 return -1;
 923         }
 924         return 0;
 925 }
 926
 927 /**
 928  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 929  * @priv: staging_rxon is compared to active_rxon
 930  *
 931  * If the RXON structure is changing enough to require a new tune,
 932  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 933  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 934  */
 935 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
 936 {
 937
 938         /* These items are only settable from the full RXON command */
 939         if (!(iwl3945_is_associated(priv)) ||
 940             compare_ether_addr(priv->staging_rxon.bssid_addr,
 941                                priv->active_rxon.bssid_addr) ||
 942             compare_ether_addr(priv->staging_rxon.node_addr,
 943                                priv->active_rxon.node_addr) ||
 944             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 945                                priv->active_rxon.wlap_bssid_addr) ||
 946             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 947             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 948             (priv->staging_rxon.air_propagation !=
 949              priv->active_rxon.air_propagation) ||
 950             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 951                 return 1;
 952
 953         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 954          * be updated with the RXON_ASSOC command -- however only some
 955          * flag transitions are allowed using RXON_ASSOC */
 956
 957         /* Check if we are not switching bands */
 958         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 959             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 960                 return 1;
 961
 962         /* Check if we are switching association toggle */
 963         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 964                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 965                 return 1;
 966
 967         return 0;
 968 }
 969
 970 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
 971 {
 972         int rc = 0;
 973         struct iwl3945_rx_packet *res = NULL;
 974         struct iwl3945_rxon_assoc_cmd rxon_assoc;
 975         struct iwl3945_host_cmd cmd = {
 976                 .id = REPLY_RXON_ASSOC,
 977                 .len = sizeof(rxon_assoc),
 978                 .meta.flags = CMD_WANT_SKB,
 979                 .data = &rxon_assoc,
 980         };
 981         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
 982         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
 983
 984         if ((rxon1->flags == rxon2->flags) &&
 985             (rxon1->filter_flags == rxon2->filter_flags) &&
 986             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 987             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 988                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
 989                 return 0;
 990         }
 991
 992         rxon_assoc.flags = priv->staging_rxon.flags;
 993         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
 994         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
 995         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
 996         rxon_assoc.reserved = 0;
 997
 998         rc = iwl3945_send_cmd_sync(priv, &cmd);
 999         if (rc)
1000                 return rc;
1001
1002         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1003         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1004                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1005                 rc = -EIO;
1006         }
1007
1008         priv->alloc_rxb_skb--;
1009         dev_kfree_skb_any(cmd.meta.u.skb);
1010
1011         return rc;
1012 }
1013
1014 /**
1015  * iwl3945_commit_rxon - commit staging_rxon to hardware
1016  *
1017  * The RXON command in staging_rxon is committed to the hardware and
1018  * the active_rxon structure is updated with the new data.  This
1019  * function correctly transitions out of the RXON_ASSOC_MSK state if
1020  * a HW tune is required based on the RXON structure changes.
1021  */
1022 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1023 {
1024         /* cast away the const for active_rxon in this function */
1025         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1026         int rc = 0;
1027
1028         if (!iwl3945_is_alive(priv))
1029                 return -1;
1030
1031         /* always get timestamp with Rx frame */
1032         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1033
1034         /* select antenna */
1035         priv->staging_rxon.flags &=
1036             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1037         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1038
1039         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1040         if (rc) {
1041                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1042                 return -EINVAL;
1043         }
1044
1045         /* If we don't need to send a full RXON, we can use
1046          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1047          * and other flags for the current radio configuration. */
1048         if (!iwl3945_full_rxon_required(priv)) {
1049                 rc = iwl3945_send_rxon_assoc(priv);
1050                 if (rc) {
1051                         IWL_ERROR("Error setting RXON_ASSOC "
1052                                   "configuration (%d).\n", rc);
1053                         return rc;
1054                 }
1055
1056                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1057
1058                 return 0;
1059         }
1060
1061         /* If we are currently associated and the new config requires
1062          * an RXON_ASSOC and the new config wants the associated mask enabled,
1063          * we must clear the associated from the active configuration
1064          * before we apply the new config */
1065         if (iwl3945_is_associated(priv) &&
1066             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1067                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1068                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1069
1070                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1071                                       sizeof(struct iwl3945_rxon_cmd),
1072                                       &priv->active_rxon);
1073
1074                 /* If the mask clearing failed then we set
1075                  * active_rxon back to what it was previously */
1076                 if (rc) {
1077                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1078                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1079                                   "configuration (%d).\n", rc);
1080                         return rc;
1081                 }
1082         }
1083
1084         IWL_DEBUG_INFO("Sending RXON\n"
1085                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1086                        "* channel = %d\n"
1087                        "* bssid = %pM\n",
1088                        ((priv->staging_rxon.filter_flags &
1089                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1090                        le16_to_cpu(priv->staging_rxon.channel),
1091                        priv->staging_rxon.bssid_addr);
1092
1093         /* Apply the new configuration */
1094         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1095                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1096         if (rc) {
1097                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1098                 return rc;
1099         }
1100
1101         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1102
1103         iwl3945_clear_stations_table(priv);
1104
1105         /* If we issue a new RXON command which required a tune then we must
1106          * send a new TXPOWER command or we won't be able to Tx any frames */
1107         rc = iwl3945_hw_reg_send_txpower(priv);
1108         if (rc) {
1109                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1110                 return rc;
1111         }
1112
1113         /* Add the broadcast address so we can send broadcast frames */
1114         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1115             IWL_INVALID_STATION) {
1116                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1117                 return -EIO;
1118         }
1119
1120         /* If we have set the ASSOC_MSK and we are in BSS mode then
1121          * add the IWL_AP_ID to the station rate table */
1122         if (iwl3945_is_associated(priv) &&
1123             (priv->iw_mode == NL80211_IFTYPE_STATION))
1124                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1125                     == IWL_INVALID_STATION) {
1126                         IWL_ERROR("Error adding AP address for transmit.\n");
1127                         return -EIO;
1128                 }
1129
1130         /* Init the hardware's rate fallback order based on the band */
1131         rc = iwl3945_init_hw_rate_table(priv);
1132         if (rc) {
1133                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1134                 return -EIO;
1135         }
1136
1137         return 0;
1138 }
1139
1140 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1141 {
1142         struct iwl_bt_cmd bt_cmd = {
1143                 .flags = 3,
1144                 .lead_time = 0xAA,
1145                 .max_kill = 1,
1146                 .kill_ack_mask = 0,
1147                 .kill_cts_mask = 0,
1148         };
1149
1150         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1151                                         sizeof(bt_cmd), &bt_cmd);
1152 }
1153
1154 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1155 {
1156         int rc = 0;
1157         struct iwl3945_rx_packet *res;
1158         struct iwl3945_host_cmd cmd = {
1159                 .id = REPLY_SCAN_ABORT_CMD,
1160                 .meta.flags = CMD_WANT_SKB,
1161         };
1162
1163         /* If there isn't a scan actively going on in the hardware
1164          * then we are in between scan bands and not actually
1165          * actively scanning, so don't send the abort command */
1166         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1167                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1168                 return 0;
1169         }
1170
1171         rc = iwl3945_send_cmd_sync(priv, &cmd);
1172         if (rc) {
1173                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1174                 return rc;
1175         }
1176
1177         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1178         if (res->u.status != CAN_ABORT_STATUS) {
1179                 /* The scan abort will return 1 for success or
1180                  * 2 for "failure".  A failure condition can be
1181                  * due to simply not being in an active scan which
1182                  * can occur if we send the scan abort before we
1183                  * the microcode has notified us that a scan is
1184                  * completed. */
1185                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1186                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1187                 clear_bit(STATUS_SCAN_HW, &priv->status);
1188         }
1189
1190         dev_kfree_skb_any(cmd.meta.u.skb);
1191
1192         return rc;
1193 }
1194
1195 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1196                                         struct iwl3945_cmd *cmd,
1197                                         struct sk_buff *skb)
1198 {
1199         return 1;
1200 }
1201
1202 /*
1203  * CARD_STATE_CMD
1204  *
1205  * Use: Sets the device's internal card state to enable, disable, or halt
1206  *
1207  * When in the 'enable' state the card operates as normal.
1208  * When in the 'disable' state, the card enters into a low power mode.
1209  * When in the 'halt' state, the card is shut down and must be fully
1210  * restarted to come back on.
1211  */
1212 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1213 {
1214         struct iwl3945_host_cmd cmd = {
1215                 .id = REPLY_CARD_STATE_CMD,
1216                 .len = sizeof(u32),
1217                 .data = &flags,
1218                 .meta.flags = meta_flag,
1219         };
1220
1221         if (meta_flag & CMD_ASYNC)
1222                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1223
1224         return iwl3945_send_cmd(priv, &cmd);
1225 }
1226
1227 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1228                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1229 {
1230         struct iwl3945_rx_packet *res = NULL;
1231
1232         if (!skb) {
1233                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1234                 return 1;
1235         }
1236
1237         res = (struct iwl3945_rx_packet *)skb->data;
1238         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1239                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1240                           res->hdr.flags);
1241                 return 1;
1242         }
1243
1244         switch (res->u.add_sta.status) {
1245         case ADD_STA_SUCCESS_MSK:
1246                 break;
1247         default:
1248                 break;
1249         }
1250
1251         /* We didn't cache the SKB; let the caller free it */
1252         return 1;
1253 }
1254
1255 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1256                          struct iwl3945_addsta_cmd *sta, u8 flags)
1257 {
1258         struct iwl3945_rx_packet *res = NULL;
1259         int rc = 0;
1260         struct iwl3945_host_cmd cmd = {
1261                 .id = REPLY_ADD_STA,
1262                 .len = sizeof(struct iwl3945_addsta_cmd),
1263                 .meta.flags = flags,
1264                 .data = sta,
1265         };
1266
1267         if (flags & CMD_ASYNC)
1268                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1269         else
1270                 cmd.meta.flags |= CMD_WANT_SKB;
1271
1272         rc = iwl3945_send_cmd(priv, &cmd);
1273
1274         if (rc || (flags & CMD_ASYNC))
1275                 return rc;
1276
1277         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1278         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1279                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1280                           res->hdr.flags);
1281                 rc = -EIO;
1282         }
1283
1284         if (rc == 0) {
1285                 switch (res->u.add_sta.status) {
1286                 case ADD_STA_SUCCESS_MSK:
1287                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1288                         break;
1289                 default:
1290                         rc = -EIO;
1291                         IWL_WARNING("REPLY_ADD_STA failed\n");
1292                         break;
1293                 }
1294         }
1295
1296         priv->alloc_rxb_skb--;
1297         dev_kfree_skb_any(cmd.meta.u.skb);
1298
1299         return rc;
1300 }
1301
1302 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1303                                    struct ieee80211_key_conf *keyconf,
1304                                    u8 sta_id)
1305 {
1306         unsigned long flags;
1307         __le16 key_flags = 0;
1308
1309         switch (keyconf->alg) {
1310         case ALG_CCMP:
1311                 key_flags |= STA_KEY_FLG_CCMP;
1312                 key_flags |= cpu_to_le16(
1313                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1314                 key_flags &= ~STA_KEY_FLG_INVALID;
1315                 break;
1316         case ALG_TKIP:
1317         case ALG_WEP:
1318         default:
1319                 return -EINVAL;
1320         }
1321         spin_lock_irqsave(&priv->sta_lock, flags);
1322         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1323         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1324         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1325                keyconf->keylen);
1326
1327         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1328                keyconf->keylen);
1329         priv->stations[sta_id].sta.key.key_flags = key_flags;
1330         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1331         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1332
1333         spin_unlock_irqrestore(&priv->sta_lock, flags);
1334
1335         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1336         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1337         return 0;
1338 }
1339
1340 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1341 {
1342         unsigned long flags;
1343
1344         spin_lock_irqsave(&priv->sta_lock, flags);
1345         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1346         memset(&priv->stations[sta_id].sta.key, 0,
1347                 sizeof(struct iwl4965_keyinfo));
1348         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1349         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1350         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1351         spin_unlock_irqrestore(&priv->sta_lock, flags);
1352
1353         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1354         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1355         return 0;
1356 }
1357
1358 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1359 {
1360         struct list_head *element;
1361
1362         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1363                        priv->frames_count);
1364
1365         while (!list_empty(&priv->free_frames)) {
1366                 element = priv->free_frames.next;
1367                 list_del(element);
1368                 kfree(list_entry(element, struct iwl3945_frame, list));
1369                 priv->frames_count--;
1370         }
1371
1372         if (priv->frames_count) {
1373                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1374                             priv->frames_count);
1375                 priv->frames_count = 0;
1376         }
1377 }
1378
1379 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1380 {
1381         struct iwl3945_frame *frame;
1382         struct list_head *element;
1383         if (list_empty(&priv->free_frames)) {
1384                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1385                 if (!frame) {
1386                         IWL_ERROR("Could not allocate frame!\n");
1387                         return NULL;
1388                 }
1389
1390                 priv->frames_count++;
1391                 return frame;
1392         }
1393
1394         element = priv->free_frames.next;
1395         list_del(element);
1396         return list_entry(element, struct iwl3945_frame, list);
1397 }
1398
1399 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1400 {
1401         memset(frame, 0, sizeof(*frame));
1402         list_add(&frame->list, &priv->free_frames);
1403 }
1404
1405 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1406                                 struct ieee80211_hdr *hdr,
1407                                 int left)
1408 {
1409
1410         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1411             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
1412              (priv->iw_mode != NL80211_IFTYPE_AP)))
1413                 return 0;
1414
1415         if (priv->ibss_beacon->len > left)
1416                 return 0;
1417
1418         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1419
1420         return priv->ibss_beacon->len;
1421 }
1422
1423 static u8 iwl3945_rate_get_lowest_plcp(struct iwl3945_priv *priv)
1424 {
1425         u8 i;
1426         int rate_mask;
1427
1428         /* Set rate mask*/
1429         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1430                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
1431         else
1432                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
1433
1434         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1435              i = iwl3945_rates[i].next_ieee) {
1436                 if (rate_mask & (1 << i))
1437                         return iwl3945_rates[i].plcp;
1438         }
1439
1440         /* No valid rate was found. Assign the lowest one */
1441         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1442                 return IWL_RATE_1M_PLCP;
1443         else
1444                 return IWL_RATE_6M_PLCP;
1445 }
1446
1447 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1448 {
1449         struct iwl3945_frame *frame;
1450         unsigned int frame_size;
1451         int rc;
1452         u8 rate;
1453
1454         frame = iwl3945_get_free_frame(priv);
1455
1456         if (!frame) {
1457                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1458                           "command.\n");
1459                 return -ENOMEM;
1460         }
1461
1462         rate = iwl3945_rate_get_lowest_plcp(priv);
1463
1464         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1465
1466         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1467                               &frame->u.cmd[0]);
1468
1469         iwl3945_free_frame(priv, frame);
1470
1471         return rc;
1472 }
1473
1474 /******************************************************************************
1475  *
1476  * EEPROM related functions
1477  *
1478  ******************************************************************************/
1479
1480 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1481 {
1482         memcpy(mac, priv->eeprom.mac_address, 6);
1483 }
1484
1485 /*
1486  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1487  * embedded controller) as EEPROM reader; each read is a series of pulses
1488  * to/from the EEPROM chip, not a single event, so even reads could conflict
1489  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1490  * simply claims ownership, which should be safe when this function is called
1491  * (i.e. before loading uCode!).
1492  */
1493 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1494 {
1495         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1496         return 0;
1497 }
1498
1499 /**
1500  * iwl3945_eeprom_init - read EEPROM contents
1501  *
1502  * Load the EEPROM contents from adapter into priv->eeprom
1503  *
1504  * NOTE:  This routine uses the non-debug IO access functions.
1505  */
1506 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1507 {
1508         u16 *e = (u16 *)&priv->eeprom;
1509         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1510         int sz = sizeof(priv->eeprom);
1511         int ret;
1512         u16 addr;
1513
1514         /* The EEPROM structure has several padding buffers within it
1515          * and when adding new EEPROM maps is subject to programmer errors
1516          * which may be very difficult to identify without explicitly
1517          * checking the resulting size of the eeprom map. */
1518         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1519
1520         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1521                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
1522                 return -ENOENT;
1523         }
1524
1525         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1526         ret = iwl3945_eeprom_acquire_semaphore(priv);
1527         if (ret < 0) {
1528                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1529                 return -ENOENT;
1530         }
1531
1532         /* eeprom is an array of 16bit values */
1533         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1534                 u32 r;
1535
1536                 _iwl3945_write32(priv, CSR_EEPROM_REG,
1537                                  CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
1538                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1539                 ret = iwl3945_poll_direct_bit(priv, CSR_EEPROM_REG,
1540                                               CSR_EEPROM_REG_READ_VALID_MSK,
1541                                               IWL_EEPROM_ACCESS_TIMEOUT);
1542                 if (ret < 0) {
1543                         IWL_ERROR("Time out reading EEPROM[%d]\n", addr);
1544                         return ret;
1545                 }
1546
1547                 r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1548                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1549         }
1550
1551         return 0;
1552 }
1553
1554 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1555 {
1556         if (priv->hw_setting.shared_virt)
1557                 pci_free_consistent(priv->pci_dev,
1558                                     sizeof(struct iwl3945_shared),
1559                                     priv->hw_setting.shared_virt,
1560                                     priv->hw_setting.shared_phys);
1561 }
1562
1563 /**
1564  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1565  *
1566  * return : set the bit for each supported rate insert in ie
1567  */
1568 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1569                                     u16 basic_rate, int *left)
1570 {
1571         u16 ret_rates = 0, bit;
1572         int i;
1573         u8 *cnt = ie;
1574         u8 *rates = ie + 1;
1575
1576         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1577                 if (bit & supported_rate) {
1578                         ret_rates |= bit;
1579                         rates[*cnt] = iwl3945_rates[i].ieee |
1580                                 ((bit & basic_rate) ? 0x80 : 0x00);
1581                         (*cnt)++;
1582                         (*left)--;
1583                         if ((*left <= 0) ||
1584                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1585                                 break;
1586                 }
1587         }
1588
1589         return ret_rates;
1590 }
1591
1592 /**
1593  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1594  */
1595 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1596                               struct ieee80211_mgmt *frame,
1597                               int left)
1598 {
1599         int len = 0;
1600         u8 *pos = NULL;
1601         u16 active_rates, ret_rates, cck_rates;
1602
1603         /* Make sure there is enough space for the probe request,
1604          * two mandatory IEs and the data */
1605         left -= 24;
1606         if (left < 0)
1607                 return 0;
1608         len += 24;
1609
1610         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1611         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1612         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1613         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1614         frame->seq_ctrl = 0;
1615
1616         /* fill in our indirect SSID IE */
1617         /* ...next IE... */
1618
1619         left -= 2;
1620         if (left < 0)
1621                 return 0;
1622         len += 2;
1623         pos = &(frame->u.probe_req.variable[0]);
1624         *pos++ = WLAN_EID_SSID;
1625         *pos++ = 0;
1626
1627         /* fill in supported rate */
1628         /* ...next IE... */
1629         left -= 2;
1630         if (left < 0)
1631                 return 0;
1632
1633         /* ... fill it in... */
1634         *pos++ = WLAN_EID_SUPP_RATES;
1635         *pos = 0;
1636
1637         priv->active_rate = priv->rates_mask;
1638         active_rates = priv->active_rate;
1639         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1640
1641         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1642         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1643                         priv->active_rate_basic, &left);
1644         active_rates &= ~ret_rates;
1645
1646         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1647                                  priv->active_rate_basic, &left);
1648         active_rates &= ~ret_rates;
1649
1650         len += 2 + *pos;
1651         pos += (*pos) + 1;
1652         if (active_rates == 0)
1653                 goto fill_end;
1654
1655         /* fill in supported extended rate */
1656         /* ...next IE... */
1657         left -= 2;
1658         if (left < 0)
1659                 return 0;
1660         /* ... fill it in... */
1661         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1662         *pos = 0;
1663         iwl3945_supported_rate_to_ie(pos, active_rates,
1664                                  priv->active_rate_basic, &left);
1665         if (*pos > 0)
1666                 len += 2 + *pos;
1667
1668  fill_end:
1669         return (u16)len;
1670 }
1671
1672 /*
1673  * QoS  support
1674 */
1675 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1676                                        struct iwl_qosparam_cmd *qos)
1677 {
1678
1679         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1680                                 sizeof(struct iwl_qosparam_cmd), qos);
1681 }
1682
1683 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1684 {
1685         u16 cw_min = 15;
1686         u16 cw_max = 1023;
1687         u8 aifs = 2;
1688         u8 is_legacy = 0;
1689         unsigned long flags;
1690         int i;
1691
1692         spin_lock_irqsave(&priv->lock, flags);
1693         priv->qos_data.qos_active = 0;
1694
1695         /* QoS always active in AP and ADHOC mode
1696          * In STA mode wait for association
1697          */
1698         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
1699             priv->iw_mode == NL80211_IFTYPE_AP)
1700                 priv->qos_data.qos_active = 1;
1701         else
1702                 priv->qos_data.qos_active = 0;
1703
1704
1705         /* check for legacy mode */
1706         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
1707              (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
1708             (priv->iw_mode == NL80211_IFTYPE_STATION &&
1709              (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
1710                 cw_min = 31;
1711                 is_legacy = 1;
1712         }
1713
1714         if (priv->qos_data.qos_active)
1715                 aifs = 3;
1716
1717         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1718         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1719         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1720         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1721         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1722
1723         if (priv->qos_data.qos_active) {
1724                 i = 1;
1725                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1726                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1727                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1728                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1729                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1730
1731                 i = 2;
1732                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1733                         cpu_to_le16((cw_min + 1) / 2 - 1);
1734                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1735                         cpu_to_le16(cw_max);
1736                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1737                 if (is_legacy)
1738                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1739                                 cpu_to_le16(6016);
1740                 else
1741                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1742                                 cpu_to_le16(3008);
1743                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1744
1745                 i = 3;
1746                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1747                         cpu_to_le16((cw_min + 1) / 4 - 1);
1748                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1749                         cpu_to_le16((cw_max + 1) / 2 - 1);
1750                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1751                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1752                 if (is_legacy)
1753                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1754                                 cpu_to_le16(3264);
1755                 else
1756                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1757                                 cpu_to_le16(1504);
1758         } else {
1759                 for (i = 1; i < 4; i++) {
1760                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1761                                 cpu_to_le16(cw_min);
1762                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1763                                 cpu_to_le16(cw_max);
1764                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1765                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1766                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1767                 }
1768         }
1769         IWL_DEBUG_QOS("set QoS to default \n");
1770
1771         spin_unlock_irqrestore(&priv->lock, flags);
1772 }
1773
1774 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
1775 {
1776         unsigned long flags;
1777
1778         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1779                 return;
1780
1781         spin_lock_irqsave(&priv->lock, flags);
1782         priv->qos_data.def_qos_parm.qos_flags = 0;
1783
1784         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1785             !priv->qos_data.qos_cap.q_AP.txop_request)
1786                 priv->qos_data.def_qos_parm.qos_flags |=
1787                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1788
1789         if (priv->qos_data.qos_active)
1790                 priv->qos_data.def_qos_parm.qos_flags |=
1791                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1792
1793         spin_unlock_irqrestore(&priv->lock, flags);
1794
1795         if (force || iwl3945_is_associated(priv)) {
1796                 IWL_DEBUG_QOS("send QoS cmd with QoS active %d \n",
1797                               priv->qos_data.qos_active);
1798
1799                 iwl3945_send_qos_params_command(priv,
1800                                 &(priv->qos_data.def_qos_parm));
1801         }
1802 }
1803
1804 /*
1805  * Power management (not Tx power!) functions
1806  */
1807 #define MSEC_TO_USEC 1024
1808
1809
1810 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1811 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1812 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1813 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1814                                      __constant_cpu_to_le32(X1), \
1815                                      __constant_cpu_to_le32(X2), \
1816                                      __constant_cpu_to_le32(X3), \
1817                                      __constant_cpu_to_le32(X4)}
1818
1819 /* default power management (not Tx power) table values */
1820 /* for TIM  0-10 */
1821 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
1822         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1823         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1824         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1825         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1826         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1827         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1828 };
1829
1830 /* for TIM > 10 */
1831 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
1832         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1833         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1834                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1835         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1836                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1837         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1838                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1839         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1840         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1841                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1842 };
1843
1844 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
1845 {
1846         int rc = 0, i;
1847         struct iwl3945_power_mgr *pow_data;
1848         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
1849         u16 pci_pm;
1850
1851         IWL_DEBUG_POWER("Initialize power \n");
1852
1853         pow_data = &(priv->power_data);
1854
1855         memset(pow_data, 0, sizeof(*pow_data));
1856
1857         pow_data->active_index = IWL_POWER_RANGE_0;
1858         pow_data->dtim_val = 0xffff;
1859
1860         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1861         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1862
1863         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1864         if (rc != 0)
1865                 return 0;
1866         else {
1867                 struct iwl_powertable_cmd *cmd;
1868
1869                 IWL_DEBUG_POWER("adjust power command flags\n");
1870
1871                 for (i = 0; i < IWL_POWER_AC; i++) {
1872                         cmd = &pow_data->pwr_range_0[i].cmd;
1873
1874                         if (pci_pm & 0x1)
1875                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1876                         else
1877                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1878                 }
1879         }
1880         return rc;
1881 }
1882
1883 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
1884                                 struct iwl_powertable_cmd *cmd, u32 mode)
1885 {
1886         int rc = 0, i;
1887         u8 skip;
1888         u32 max_sleep = 0;
1889         struct iwl3945_power_vec_entry *range;
1890         u8 period = 0;
1891         struct iwl3945_power_mgr *pow_data;
1892
1893         if (mode > IWL_POWER_INDEX_5) {
1894                 IWL_DEBUG_POWER("Error invalid power mode \n");
1895                 return -1;
1896         }
1897         pow_data = &(priv->power_data);
1898
1899         if (pow_data->active_index == IWL_POWER_RANGE_0)
1900                 range = &pow_data->pwr_range_0[0];
1901         else
1902                 range = &pow_data->pwr_range_1[1];
1903
1904         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1905
1906 #ifdef IWL_MAC80211_DISABLE
1907         if (priv->assoc_network != NULL) {
1908                 unsigned long flags;
1909
1910                 period = priv->assoc_network->tim.tim_period;
1911         }
1912 #endif  /*IWL_MAC80211_DISABLE */
1913         skip = range[mode].no_dtim;
1914
1915         if (period == 0) {
1916                 period = 1;
1917                 skip = 0;
1918         }
1919
1920         if (skip == 0) {
1921                 max_sleep = period;
1922                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1923         } else {
1924                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1925                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1926                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1927         }
1928
1929         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1930                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1931                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1932         }
1933
1934         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1935         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1936         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1937         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1938                         le32_to_cpu(cmd->sleep_interval[0]),
1939                         le32_to_cpu(cmd->sleep_interval[1]),
1940                         le32_to_cpu(cmd->sleep_interval[2]),
1941                         le32_to_cpu(cmd->sleep_interval[3]),
1942                         le32_to_cpu(cmd->sleep_interval[4]));
1943
1944         return rc;
1945 }
1946
1947 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
1948 {
1949         u32 uninitialized_var(final_mode);
1950         int rc;
1951         struct iwl_powertable_cmd cmd;
1952
1953         /* If on battery, set to 3,
1954          * if plugged into AC power, set to CAM ("continuously aware mode"),
1955          * else user level */
1956         switch (mode) {
1957         case IWL_POWER_BATTERY:
1958                 final_mode = IWL_POWER_INDEX_3;
1959                 break;
1960         case IWL_POWER_AC:
1961                 final_mode = IWL_POWER_MODE_CAM;
1962                 break;
1963         default:
1964                 final_mode = mode;
1965                 break;
1966         }
1967
1968         iwl3945_update_power_cmd(priv, &cmd, final_mode);
1969
1970         /* FIXME use get_hcmd_size 3945 command is 4 bytes shorter */
1971         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD,
1972                                 sizeof(struct iwl3945_powertable_cmd), &cmd);
1973
1974         if (final_mode == IWL_POWER_MODE_CAM)
1975                 clear_bit(STATUS_POWER_PMI, &priv->status);
1976         else
1977                 set_bit(STATUS_POWER_PMI, &priv->status);
1978
1979         return rc;
1980 }
1981
1982 /**
1983  * iwl3945_scan_cancel - Cancel any currently executing HW scan
1984  *
1985  * NOTE: priv->mutex is not required before calling this function
1986  */
1987 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
1988 {
1989         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1990                 clear_bit(STATUS_SCANNING, &priv->status);
1991                 return 0;
1992         }
1993
1994         if (test_bit(STATUS_SCANNING, &priv->status)) {
1995                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1996                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1997                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1998                         queue_work(priv->workqueue, &priv->abort_scan);
1999
2000                 } else
2001                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2002
2003                 return test_bit(STATUS_SCANNING, &priv->status);
2004         }
2005
2006         return 0;
2007 }
2008
2009 /**
2010  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2011  * @ms: amount of time to wait (in milliseconds) for scan to abort
2012  *
2013  * NOTE: priv->mutex must be held before calling this function
2014  */
2015 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2016 {
2017         unsigned long now = jiffies;
2018         int ret;
2019
2020         ret = iwl3945_scan_cancel(priv);
2021         if (ret && ms) {
2022                 mutex_unlock(&priv->mutex);
2023                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2024                                 test_bit(STATUS_SCANNING, &priv->status))
2025                         msleep(1);
2026                 mutex_lock(&priv->mutex);
2027
2028                 return test_bit(STATUS_SCANNING, &priv->status);
2029         }
2030
2031         return ret;
2032 }
2033
2034 #define MAX_UCODE_BEACON_INTERVAL       1024
2035 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2036
2037 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2038 {
2039         u16 new_val = 0;
2040         u16 beacon_factor = 0;
2041
2042         beacon_factor =
2043             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2044                 / MAX_UCODE_BEACON_INTERVAL;
2045         new_val = beacon_val / beacon_factor;
2046
2047         return cpu_to_le16(new_val);
2048 }
2049
2050 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2051 {
2052         u64 interval_tm_unit;
2053         u64 tsf, result;
2054         unsigned long flags;
2055         struct ieee80211_conf *conf = NULL;
2056         u16 beacon_int = 0;
2057
2058         conf = ieee80211_get_hw_conf(priv->hw);
2059
2060         spin_lock_irqsave(&priv->lock, flags);
2061         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2062         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2063
2064         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2065
2066         tsf = priv->timestamp1;
2067         tsf = ((tsf << 32) | priv->timestamp0);
2068
2069         beacon_int = priv->beacon_int;
2070         spin_unlock_irqrestore(&priv->lock, flags);
2071
2072         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
2073                 if (beacon_int == 0) {
2074                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2075                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2076                 } else {
2077                         priv->rxon_timing.beacon_interval =
2078                                 cpu_to_le16(beacon_int);
2079                         priv->rxon_timing.beacon_interval =
2080                             iwl3945_adjust_beacon_interval(
2081                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2082                 }
2083
2084                 priv->rxon_timing.atim_window = 0;
2085         } else {
2086                 priv->rxon_timing.beacon_interval =
2087                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2088                 /* TODO: we need to get atim_window from upper stack
2089                  * for now we set to 0 */
2090                 priv->rxon_timing.atim_window = 0;
2091         }
2092
2093         interval_tm_unit =
2094                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2095         result = do_div(tsf, interval_tm_unit);
2096         priv->rxon_timing.beacon_init_val =
2097             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2098
2099         IWL_DEBUG_ASSOC
2100             ("beacon interval %d beacon timer %d beacon tim %d\n",
2101                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2102                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2103                 le16_to_cpu(priv->rxon_timing.atim_window));
2104 }
2105
2106 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2107 {
2108         if (!iwl3945_is_ready_rf(priv)) {
2109                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2110                 return -EIO;
2111         }
2112
2113         if (test_bit(STATUS_SCANNING, &priv->status)) {
2114                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2115                 return -EAGAIN;
2116         }
2117
2118         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2119                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2120                                "Queuing.\n");
2121                 return -EAGAIN;
2122         }
2123
2124         IWL_DEBUG_INFO("Starting scan...\n");
2125         if (priv->cfg->sku & IWL_SKU_G)
2126                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
2127         if (priv->cfg->sku & IWL_SKU_A)
2128                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
2129         set_bit(STATUS_SCANNING, &priv->status);
2130         priv->scan_start = jiffies;
2131         priv->scan_pass_start = priv->scan_start;
2132
2133         queue_work(priv->workqueue, &priv->request_scan);
2134
2135         return 0;
2136 }
2137
2138 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2139 {
2140         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2141
2142         if (hw_decrypt)
2143                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2144         else
2145                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2146
2147         return 0;
2148 }
2149
2150 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2151                                           enum ieee80211_band band)
2152 {
2153         if (band == IEEE80211_BAND_5GHZ) {
2154                 priv->staging_rxon.flags &=
2155                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2156                       | RXON_FLG_CCK_MSK);
2157                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2158         } else {
2159                 /* Copied from iwl3945_bg_post_associate() */
2160                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2161                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2162                 else
2163                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2164
2165                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2166                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2167
2168                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2169                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2170                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2171         }
2172 }
2173
2174 /*
2175  * initialize rxon structure with default values from eeprom
2176  */
2177 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv,
2178                                               int mode)
2179 {
2180         const struct iwl3945_channel_info *ch_info;
2181
2182         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2183
2184         switch (mode) {
2185         case NL80211_IFTYPE_AP:
2186                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2187                 break;
2188
2189         case NL80211_IFTYPE_STATION:
2190                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2191                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2192                 break;
2193
2194         case NL80211_IFTYPE_ADHOC:
2195                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2196                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2197                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2198                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2199                 break;
2200
2201         case NL80211_IFTYPE_MONITOR:
2202                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2203                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2204                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2205                 break;
2206         default:
2207                 IWL_ERROR("Unsupported interface type %d\n", mode);
2208                 break;
2209         }
2210
2211 #if 0
2212         /* TODO:  Figure out when short_preamble would be set and cache from
2213          * that */
2214         if (!hw_to_local(priv->hw)->short_preamble)
2215                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2216         else
2217                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2218 #endif
2219
2220         ch_info = iwl3945_get_channel_info(priv, priv->band,
2221                                        le16_to_cpu(priv->active_rxon.channel));
2222
2223         if (!ch_info)
2224                 ch_info = &priv->channel_info[0];
2225
2226         /*
2227          * in some case A channels are all non IBSS
2228          * in this case force B/G channel
2229          */
2230         if ((mode == NL80211_IFTYPE_ADHOC) && !(is_channel_ibss(ch_info)))
2231                 ch_info = &priv->channel_info[0];
2232
2233         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2234         if (is_channel_a_band(ch_info))
2235                 priv->band = IEEE80211_BAND_5GHZ;
2236         else
2237                 priv->band = IEEE80211_BAND_2GHZ;
2238
2239         iwl3945_set_flags_for_phymode(priv, priv->band);
2240
2241         priv->staging_rxon.ofdm_basic_rates =
2242             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2243         priv->staging_rxon.cck_basic_rates =
2244             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2245 }
2246
2247 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2248 {
2249         if (mode == NL80211_IFTYPE_ADHOC) {
2250                 const struct iwl3945_channel_info *ch_info;
2251
2252                 ch_info = iwl3945_get_channel_info(priv,
2253                         priv->band,
2254                         le16_to_cpu(priv->staging_rxon.channel));
2255
2256                 if (!ch_info || !is_channel_ibss(ch_info)) {
2257                         IWL_ERROR("channel %d not IBSS channel\n",
2258                                   le16_to_cpu(priv->staging_rxon.channel));
2259                         return -EINVAL;
2260                 }
2261         }
2262
2263         iwl3945_connection_init_rx_config(priv, mode);
2264         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2265
2266         iwl3945_clear_stations_table(priv);
2267
2268         /* don't commit rxon if rf-kill is on*/
2269         if (!iwl3945_is_ready_rf(priv))
2270                 return -EAGAIN;
2271
2272         cancel_delayed_work(&priv->scan_check);
2273         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2274                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2275                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2276                 return -EAGAIN;
2277         }
2278
2279         iwl3945_commit_rxon(priv);
2280
2281         return 0;
2282 }
2283
2284 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2285                                       struct ieee80211_tx_info *info,
2286                                       struct iwl3945_cmd *cmd,
2287                                       struct sk_buff *skb_frag,
2288                                       int last_frag)
2289 {
2290         struct iwl3945_hw_key *keyinfo =
2291             &priv->stations[info->control.hw_key->hw_key_idx].keyinfo;
2292
2293         switch (keyinfo->alg) {
2294         case ALG_CCMP:
2295                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2296                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2297                 IWL_DEBUG_TX("tx_cmd with AES hwcrypto\n");
2298                 break;
2299
2300         case ALG_TKIP:
2301 #if 0
2302                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2303
2304                 if (last_frag)
2305                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2306                                8);
2307                 else
2308                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2309 #endif
2310                 break;
2311
2312         case ALG_WEP:
2313                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2314                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2315
2316                 if (keyinfo->keylen == 13)
2317                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2318
2319                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2320
2321                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2322                              "with key %d\n", info->control.hw_key->hw_key_idx);
2323                 break;
2324
2325         default:
2326                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2327                 break;
2328         }
2329 }
2330
2331 /*
2332  * handle build REPLY_TX command notification.
2333  */
2334 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2335                                   struct iwl3945_cmd *cmd,
2336                                   struct ieee80211_tx_info *info,
2337                                   struct ieee80211_hdr *hdr,
2338                                   int is_unicast, u8 std_id)
2339 {
2340         __le16 fc = hdr->frame_control;
2341         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2342         u8 rc_flags = info->control.rates[0].flags;
2343
2344         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2345         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
2346                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2347                 if (ieee80211_is_mgmt(fc))
2348                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2349                 if (ieee80211_is_probe_resp(fc) &&
2350                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2351                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2352         } else {
2353                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2354                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2355         }
2356
2357         cmd->cmd.tx.sta_id = std_id;
2358         if (ieee80211_has_morefrags(fc))
2359                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2360
2361         if (ieee80211_is_data_qos(fc)) {
2362                 u8 *qc = ieee80211_get_qos_ctl(hdr);
2363                 cmd->cmd.tx.tid_tspec = qc[0] & 0xf;
2364                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2365         } else {
2366                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2367         }
2368
2369         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2370                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2371                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2372         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
2373                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2374                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2375         }
2376
2377         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2378                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2379
2380         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2381         if (ieee80211_is_mgmt(fc)) {
2382                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
2383                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2384                 else
2385                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2386         } else {
2387                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2388 #ifdef CONFIG_IWL3945_LEDS
2389                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2390 #endif
2391         }
2392
2393         cmd->cmd.tx.driver_txop = 0;
2394         cmd->cmd.tx.tx_flags = tx_flags;
2395         cmd->cmd.tx.next_frame_len = 0;
2396 }
2397
2398 /**
2399  * iwl3945_get_sta_id - Find station's index within station table
2400  */
2401 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2402 {
2403         int sta_id;
2404         u16 fc = le16_to_cpu(hdr->frame_control);
2405
2406         /* If this frame is broadcast or management, use broadcast station id */
2407         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2408             is_multicast_ether_addr(hdr->addr1))
2409                 return priv->hw_setting.bcast_sta_id;
2410
2411         switch (priv->iw_mode) {
2412
2413         /* If we are a client station in a BSS network, use the special
2414          * AP station entry (that's the only station we communicate with) */
2415         case NL80211_IFTYPE_STATION:
2416                 return IWL_AP_ID;
2417
2418         /* If we are an AP, then find the station, or use BCAST */
2419         case NL80211_IFTYPE_AP:
2420                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2421                 if (sta_id != IWL_INVALID_STATION)
2422                         return sta_id;
2423                 return priv->hw_setting.bcast_sta_id;
2424
2425         /* If this frame is going out to an IBSS network, find the station,
2426          * or create a new station table entry */
2427         case NL80211_IFTYPE_ADHOC: {
2428                 /* Create new station table entry */
2429                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2430                 if (sta_id != IWL_INVALID_STATION)
2431                         return sta_id;
2432
2433                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2434
2435                 if (sta_id != IWL_INVALID_STATION)
2436                         return sta_id;
2437
2438                 IWL_DEBUG_DROP("Station %pM not in station map. "
2439                                "Defaulting to broadcast...\n",
2440                                hdr->addr1);
2441                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2442                 return priv->hw_setting.bcast_sta_id;
2443         }
2444         /* If we are in monitor mode, use BCAST. This is required for
2445          * packet injection. */
2446         case NL80211_IFTYPE_MONITOR:
2447                 return priv->hw_setting.bcast_sta_id;
2448
2449         default:
2450                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
2451                 return priv->hw_setting.bcast_sta_id;
2452         }
2453 }
2454
2455 /*
2456  * start REPLY_TX command process
2457  */
2458 static int iwl3945_tx_skb(struct iwl3945_priv *priv, struct sk_buff *skb)
2459 {
2460         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2461         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2462         struct iwl3945_tfd_frame *tfd;
2463         u32 *control_flags;
2464         int txq_id = skb_get_queue_mapping(skb);
2465         struct iwl3945_tx_queue *txq = NULL;
2466         struct iwl3945_queue *q = NULL;
2467         dma_addr_t phys_addr;
2468         dma_addr_t txcmd_phys;
2469         struct iwl3945_cmd *out_cmd = NULL;
2470         u16 len, idx, len_org, hdr_len;
2471         u8 id;
2472         u8 unicast;
2473         u8 sta_id;
2474         u8 tid = 0;
2475         u16 seq_number = 0;
2476         __le16 fc;
2477         u8 wait_write_ptr = 0;
2478         u8 *qc = NULL;
2479         unsigned long flags;
2480         int rc;
2481
2482         spin_lock_irqsave(&priv->lock, flags);
2483         if (iwl3945_is_rfkill(priv)) {
2484                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2485                 goto drop_unlock;
2486         }
2487
2488         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
2489                 IWL_ERROR("ERROR: No TX rate available.\n");
2490                 goto drop_unlock;
2491         }
2492
2493         unicast = !is_multicast_ether_addr(hdr->addr1);
2494         id = 0;
2495
2496         fc = hdr->frame_control;
2497
2498 #ifdef CONFIG_IWL3945_DEBUG
2499         if (ieee80211_is_auth(fc))
2500                 IWL_DEBUG_TX("Sending AUTH frame\n");
2501         else if (ieee80211_is_assoc_req(fc))
2502                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2503         else if (ieee80211_is_reassoc_req(fc))
2504                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2505 #endif
2506
2507         /* drop all data frame if we are not associated */
2508         if (ieee80211_is_data(fc) &&
2509             (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */
2510             (!iwl3945_is_associated(priv) ||
2511              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
2512                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2513                 goto drop_unlock;
2514         }
2515
2516         spin_unlock_irqrestore(&priv->lock, flags);
2517
2518         hdr_len = ieee80211_hdrlen(fc);
2519
2520         /* Find (or create) index into station table for destination station */
2521         sta_id = iwl3945_get_sta_id(priv, hdr);
2522         if (sta_id == IWL_INVALID_STATION) {
2523                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %pM\n",
2524                                hdr->addr1);
2525                 goto drop;
2526         }
2527
2528         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2529
2530         if (ieee80211_is_data_qos(fc)) {
2531                 qc = ieee80211_get_qos_ctl(hdr);
2532                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
2533                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2534                                 IEEE80211_SCTL_SEQ;
2535                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2536                         (hdr->seq_ctrl &
2537                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2538                 seq_number += 0x10;
2539         }
2540
2541         /* Descriptor for chosen Tx queue */
2542         txq = &priv->txq[txq_id];
2543         q = &txq->q;
2544
2545         spin_lock_irqsave(&priv->lock, flags);
2546
2547         /* Set up first empty TFD within this queue's circular TFD buffer */
2548         tfd = &txq->bd[q->write_ptr];
2549         memset(tfd, 0, sizeof(*tfd));
2550         control_flags = (u32 *) tfd;
2551         idx = get_cmd_index(q, q->write_ptr, 0);
2552
2553         /* Set up driver data for this TFD */
2554         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2555         txq->txb[q->write_ptr].skb[0] = skb;
2556
2557         /* Init first empty entry in queue's array of Tx/cmd buffers */
2558         out_cmd = &txq->cmd[idx];
2559         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2560         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2561
2562         /*
2563          * Set up the Tx-command (not MAC!) header.
2564          * Store the chosen Tx queue and TFD index within the sequence field;
2565          * after Tx, uCode's Tx response will return this value so driver can
2566          * locate the frame within the tx queue and do post-tx processing.
2567          */
2568         out_cmd->hdr.cmd = REPLY_TX;
2569         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2570                                 INDEX_TO_SEQ(q->write_ptr)));
2571
2572         /* Copy MAC header from skb into command buffer */
2573         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2574
2575         /*
2576          * Use the first empty entry in this queue's command buffer array
2577          * to contain the Tx command and MAC header concatenated together
2578          * (payload data will be in another buffer).
2579          * Size of this varies, due to varying MAC header length.
2580          * If end is not dword aligned, we'll have 2 extra bytes at the end
2581          * of the MAC header (device reads on dword boundaries).
2582          * We'll tell device about this padding later.
2583          */
2584         len = priv->hw_setting.tx_cmd_len +
2585                         sizeof(struct iwl_cmd_header) + hdr_len;
2586
2587         len_org = len;
2588         len = (len + 3) & ~3;
2589
2590         if (len_org != len)
2591                 len_org = 1;
2592         else
2593                 len_org = 0;
2594
2595         /* Physical address of this Tx command's header (not MAC header!),
2596          * within command buffer array. */
2597         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2598                      offsetof(struct iwl3945_cmd, hdr);
2599
2600         /* Add buffer containing Tx command and MAC(!) header to TFD's
2601          * first entry */
2602         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2603
2604         if (info->control.hw_key)
2605                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
2606
2607         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2608          * if any (802.11 null frames have no payload). */
2609         len = skb->len - hdr_len;
2610         if (len) {
2611                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2612                                            len, PCI_DMA_TODEVICE);
2613                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2614         }
2615
2616         if (!len)
2617                 /* If there is no payload, then we use only one Tx buffer */
2618                 *control_flags = TFD_CTL_COUNT_SET(1);
2619         else
2620                 /* Else use 2 buffers.
2621                  * Tell 3945 about any padding after MAC header */
2622                 *control_flags = TFD_CTL_COUNT_SET(2) |
2623                         TFD_CTL_PAD_SET(U32_PAD(len));
2624
2625         /* Total # bytes to be transmitted */
2626         len = (u16)skb->len;
2627         out_cmd->cmd.tx.len = cpu_to_le16(len);
2628
2629         /* TODO need this for burst mode later on */
2630         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, unicast, sta_id);
2631
2632         /* set is_hcca to 0; it probably will never be implemented */
2633         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
2634
2635         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2636         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2637
2638         if (!ieee80211_has_morefrags(hdr->frame_control)) {
2639                 txq->need_update = 1;
2640                 if (qc)
2641                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2642         } else {
2643                 wait_write_ptr = 1;
2644                 txq->need_update = 0;
2645         }
2646
2647         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2648                            sizeof(out_cmd->cmd.tx));
2649
2650         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2651                            ieee80211_hdrlen(fc));
2652
2653         /* Tell device the write index *just past* this latest filled TFD */
2654         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2655         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2656         spin_unlock_irqrestore(&priv->lock, flags);
2657
2658         if (rc)
2659                 return rc;
2660
2661         if ((iwl3945_queue_space(q) < q->high_mark)
2662             && priv->mac80211_registered) {
2663                 if (wait_write_ptr) {
2664                         spin_lock_irqsave(&priv->lock, flags);
2665                         txq->need_update = 1;
2666                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2667                         spin_unlock_irqrestore(&priv->lock, flags);
2668                 }
2669
2670                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
2671         }
2672
2673         return 0;
2674
2675 drop_unlock:
2676         spin_unlock_irqrestore(&priv->lock, flags);
2677 drop:
2678         return -1;
2679 }
2680
2681 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2682 {
2683         const struct ieee80211_supported_band *sband = NULL;
2684         struct ieee80211_rate *rate;
2685         int i;
2686
2687         sband = iwl3945_get_band(priv, priv->band);
2688         if (!sband) {
2689                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2690                 return;
2691         }
2692
2693         priv->active_rate = 0;
2694         priv->active_rate_basic = 0;
2695
2696         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2697                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2698
2699         for (i = 0; i < sband->n_bitrates; i++) {
2700                 rate = &sband->bitrates[i];
2701                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2702                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2703                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2704                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2705                         priv->active_rate |= (1 << rate->hw_value);
2706                 }
2707         }
2708
2709         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2710                        priv->active_rate, priv->active_rate_basic);
2711
2712         /*
2713          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2714          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2715          * OFDM
2716          */
2717         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2718                 priv->staging_rxon.cck_basic_rates =
2719                     ((priv->active_rate_basic &
2720                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2721         else
2722                 priv->staging_rxon.cck_basic_rates =
2723                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2724
2725         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2726                 priv->staging_rxon.ofdm_basic_rates =
2727                     ((priv->active_rate_basic &
2728                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2729                       IWL_FIRST_OFDM_RATE) & 0xFF;
2730         else
2731                 priv->staging_rxon.ofdm_basic_rates =
2732                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2733 }
2734
2735 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2736 {
2737         unsigned long flags;
2738
2739         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2740                 return;
2741
2742         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2743                           disable_radio ? "OFF" : "ON");
2744
2745         if (disable_radio) {
2746                 iwl3945_scan_cancel(priv);
2747                 /* FIXME: This is a workaround for AP */
2748                 if (priv->iw_mode != NL80211_IFTYPE_AP) {
2749                         spin_lock_irqsave(&priv->lock, flags);
2750                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2751                                     CSR_UCODE_SW_BIT_RFKILL);
2752                         spin_unlock_irqrestore(&priv->lock, flags);
2753                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2754                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2755                 }
2756                 return;
2757         }
2758
2759         spin_lock_irqsave(&priv->lock, flags);
2760         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2761
2762         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2763         spin_unlock_irqrestore(&priv->lock, flags);
2764
2765         /* wake up ucode */
2766         msleep(10);
2767
2768         spin_lock_irqsave(&priv->lock, flags);
2769         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2770         if (!iwl3945_grab_nic_access(priv))
2771                 iwl3945_release_nic_access(priv);
2772         spin_unlock_irqrestore(&priv->lock, flags);
2773
2774         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2775                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2776                                   "disabled by HW switch\n");
2777                 return;
2778         }
2779
2780         if (priv->is_open)
2781                 queue_work(priv->workqueue, &priv->restart);
2782         return;
2783 }
2784
2785 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2786                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2787 {
2788         u16 fc =
2789             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2790
2791         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2792                 return;
2793
2794         if (!(fc & IEEE80211_FCTL_PROTECTED))
2795                 return;
2796
2797         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2798         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2799         case RX_RES_STATUS_SEC_TYPE_TKIP:
2800                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2801                     RX_RES_STATUS_BAD_ICV_MIC)
2802                         stats->flag |= RX_FLAG_MMIC_ERROR;
2803         case RX_RES_STATUS_SEC_TYPE_WEP:
2804         case RX_RES_STATUS_SEC_TYPE_CCMP:
2805                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2806                     RX_RES_STATUS_DECRYPT_OK) {
2807                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2808                         stats->flag |= RX_FLAG_DECRYPTED;
2809                 }
2810                 break;
2811
2812         default:
2813                 break;
2814         }
2815 }
2816
2817 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2818
2819 #include "iwl-spectrum.h"
2820
2821 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2822 #define BEACON_TIME_MASK_HIGH   0xFF000000
2823 #define TIME_UNIT               1024
2824
2825 /*
2826  * extended beacon time format
2827  * time in usec will be changed into a 32-bit value in 8:24 format
2828  * the high 1 byte is the beacon counts
2829  * the lower 3 bytes is the time in usec within one beacon interval
2830  */
2831
2832 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2833 {
2834         u32 quot;
2835         u32 rem;
2836         u32 interval = beacon_interval * 1024;
2837
2838         if (!interval || !usec)
2839                 return 0;
2840
2841         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2842         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2843
2844         return (quot << 24) + rem;
2845 }
2846
2847 /* base is usually what we get from ucode with each received frame,
2848  * the same as HW timer counter counting down
2849  */
2850
2851 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2852 {
2853         u32 base_low = base & BEACON_TIME_MASK_LOW;
2854         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2855         u32 interval = beacon_interval * TIME_UNIT;
2856         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2857             (addon & BEACON_TIME_MASK_HIGH);
2858
2859         if (base_low > addon_low)
2860                 res += base_low - addon_low;
2861         else if (base_low < addon_low) {
2862                 res += interval + base_low - addon_low;
2863                 res += (1 << 24);
2864         } else
2865                 res += (1 << 24);
2866
2867         return cpu_to_le32(res);
2868 }
2869
2870 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
2871                                struct ieee80211_measurement_params *params,
2872                                u8 type)
2873 {
2874         struct iwl_spectrum_cmd spectrum;
2875         struct iwl3945_rx_packet *res;
2876         struct iwl3945_host_cmd cmd = {
2877                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2878                 .data = (void *)&spectrum,
2879                 .meta.flags = CMD_WANT_SKB,
2880         };
2881         u32 add_time = le64_to_cpu(params->start_time);
2882         int rc;
2883         int spectrum_resp_status;
2884         int duration = le16_to_cpu(params->duration);
2885
2886         if (iwl3945_is_associated(priv))
2887                 add_time =
2888                     iwl3945_usecs_to_beacons(
2889                         le64_to_cpu(params->start_time) - priv->last_tsf,
2890                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2891
2892         memset(&spectrum, 0, sizeof(spectrum));
2893
2894         spectrum.channel_count = cpu_to_le16(1);
2895         spectrum.flags =
2896             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2897         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2898         cmd.len = sizeof(spectrum);
2899         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2900
2901         if (iwl3945_is_associated(priv))
2902                 spectrum.start_time =
2903                     iwl3945_add_beacon_time(priv->last_beacon_time,
2904                                 add_time,
2905                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2906         else
2907                 spectrum.start_time = 0;
2908
2909         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2910         spectrum.channels[0].channel = params->channel;
2911         spectrum.channels[0].type = type;
2912         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2913                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2914                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2915
2916         rc = iwl3945_send_cmd_sync(priv, &cmd);
2917         if (rc)
2918                 return rc;
2919
2920         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
2921         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2922                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2923                 rc = -EIO;
2924         }
2925
2926         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2927         switch (spectrum_resp_status) {
2928         case 0:         /* Command will be handled */
2929                 if (res->u.spectrum.id != 0xff) {
2930                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
2931                                                 res->u.spectrum.id);
2932                         priv->measurement_status &= ~MEASUREMENT_READY;
2933                 }
2934                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2935                 rc = 0;
2936                 break;
2937
2938         case 1:         /* Command will not be handled */
2939                 rc = -EAGAIN;
2940                 break;
2941         }
2942
2943         dev_kfree_skb_any(cmd.meta.u.skb);
2944
2945         return rc;
2946 }
2947 #endif
2948
2949 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
2950                                struct iwl3945_rx_mem_buffer *rxb)
2951 {
2952         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
2953         struct iwl3945_alive_resp *palive;
2954         struct delayed_work *pwork;
2955
2956         palive = &pkt->u.alive_frame;
2957
2958         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2959                        "0x%01X 0x%01X\n",
2960                        palive->is_valid, palive->ver_type,
2961                        palive->ver_subtype);
2962
2963         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2964                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2965                 memcpy(&priv->card_alive_init,
2966                        &pkt->u.alive_frame,
2967                        sizeof(struct iwl3945_init_alive_resp));
2968                 pwork = &priv->init_alive_start;
2969         } else {
2970                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2971                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2972                        sizeof(struct iwl3945_alive_resp));
2973                 pwork = &priv->alive_start;
2974                 iwl3945_disable_events(priv);
2975         }
2976
2977         /* We delay the ALIVE response by 5ms to
2978          * give the HW RF Kill time to activate... */
2979         if (palive->is_valid == UCODE_VALID_OK)
2980                 queue_delayed_work(priv->workqueue, pwork,
2981                                    msecs_to_jiffies(5));
2982         else
2983                 IWL_WARNING("uCode did not respond OK.\n");
2984 }
2985
2986 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
2987                                  struct iwl3945_rx_mem_buffer *rxb)
2988 {
2989         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
2990
2991         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2992         return;
2993 }
2994
2995 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
2996                                struct iwl3945_rx_mem_buffer *rxb)
2997 {
2998         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
2999
3000         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3001                 "seq 0x%04X ser 0x%08X\n",
3002                 le32_to_cpu(pkt->u.err_resp.error_type),
3003                 get_cmd_string(pkt->u.err_resp.cmd_id),
3004                 pkt->u.err_resp.cmd_id,
3005                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3006                 le32_to_cpu(pkt->u.err_resp.error_info));
3007 }
3008
3009 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3010
3011 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3012 {
3013         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3014         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3015         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3016         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3017                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3018         rxon->channel = csa->channel;
3019         priv->staging_rxon.channel = csa->channel;
3020 }
3021
3022 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3023                                           struct iwl3945_rx_mem_buffer *rxb)
3024 {
3025 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3026         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3027         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3028
3029         if (!report->state) {
3030                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3031                           "Spectrum Measure Notification: Start\n");
3032                 return;
3033         }
3034
3035         memcpy(&priv->measure_report, report, sizeof(*report));
3036         priv->measurement_status |= MEASUREMENT_READY;
3037 #endif
3038 }
3039
3040 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3041                                   struct iwl3945_rx_mem_buffer *rxb)
3042 {
3043 #ifdef CONFIG_IWL3945_DEBUG
3044         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3045         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3046         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3047                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3048 #endif
3049 }
3050
3051 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3052                                              struct iwl3945_rx_mem_buffer *rxb)
3053 {
3054         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3055         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3056                         "notification for %s:\n",
3057                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3058         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3059 }
3060
3061 static void iwl3945_bg_beacon_update(struct work_struct *work)
3062 {
3063         struct iwl3945_priv *priv =
3064                 container_of(work, struct iwl3945_priv, beacon_update);
3065         struct sk_buff *beacon;
3066
3067         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3068         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
3069
3070         if (!beacon) {
3071                 IWL_ERROR("update beacon failed\n");
3072                 return;
3073         }
3074
3075         mutex_lock(&priv->mutex);
3076         /* new beacon skb is allocated every time; dispose previous.*/
3077         if (priv->ibss_beacon)
3078                 dev_kfree_skb(priv->ibss_beacon);
3079
3080         priv->ibss_beacon = beacon;
3081         mutex_unlock(&priv->mutex);
3082
3083         iwl3945_send_beacon_cmd(priv);
3084 }
3085
3086 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3087                                 struct iwl3945_rx_mem_buffer *rxb)
3088 {
3089 #ifdef CONFIG_IWL3945_DEBUG
3090         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3091         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3092         u8 rate = beacon->beacon_notify_hdr.rate;
3093
3094         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3095                 "tsf %d %d rate %d\n",
3096                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3097                 beacon->beacon_notify_hdr.failure_frame,
3098                 le32_to_cpu(beacon->ibss_mgr_status),
3099                 le32_to_cpu(beacon->high_tsf),
3100                 le32_to_cpu(beacon->low_tsf), rate);
3101 #endif
3102
3103         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
3104             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3105                 queue_work(priv->workqueue, &priv->beacon_update);
3106 }
3107
3108 /* Service response to REPLY_SCAN_CMD (0x80) */
3109 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3110                               struct iwl3945_rx_mem_buffer *rxb)
3111 {
3112 #ifdef CONFIG_IWL3945_DEBUG
3113         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3114         struct iwl_scanreq_notification *notif =
3115             (struct iwl_scanreq_notification *)pkt->u.raw;
3116
3117         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3118 #endif
3119 }
3120
3121 /* Service SCAN_START_NOTIFICATION (0x82) */
3122 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3123                                     struct iwl3945_rx_mem_buffer *rxb)
3124 {
3125         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3126         struct iwl_scanstart_notification *notif =
3127             (struct iwl_scanstart_notification *)pkt->u.raw;
3128         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3129         IWL_DEBUG_SCAN("Scan start: "
3130                        "%d [802.11%s] "
3131                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3132                        notif->channel,
3133                        notif->band ? "bg" : "a",
3134                        notif->tsf_high,
3135                        notif->tsf_low, notif->status, notif->beacon_timer);
3136 }
3137
3138 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3139 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3140                                       struct iwl3945_rx_mem_buffer *rxb)
3141 {
3142         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3143         struct iwl_scanresults_notification *notif =
3144             (struct iwl_scanresults_notification *)pkt->u.raw;
3145
3146         IWL_DEBUG_SCAN("Scan ch.res: "
3147                        "%d [802.11%s] "
3148                        "(TSF: 0x%08X:%08X) - %d "
3149                        "elapsed=%lu usec (%dms since last)\n",
3150                        notif->channel,
3151                        notif->band ? "bg" : "a",
3152                        le32_to_cpu(notif->tsf_high),
3153                        le32_to_cpu(notif->tsf_low),
3154                        le32_to_cpu(notif->statistics[0]),
3155                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3156                        jiffies_to_msecs(elapsed_jiffies
3157                                         (priv->last_scan_jiffies, jiffies)));
3158
3159         priv->last_scan_jiffies = jiffies;
3160         priv->next_scan_jiffies = 0;
3161 }
3162
3163 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3164 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3165                                        struct iwl3945_rx_mem_buffer *rxb)
3166 {
3167         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3168         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3169
3170         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3171                        scan_notif->scanned_channels,
3172                        scan_notif->tsf_low,
3173                        scan_notif->tsf_high, scan_notif->status);
3174
3175         /* The HW is no longer scanning */
3176         clear_bit(STATUS_SCAN_HW, &priv->status);
3177
3178         /* The scan completion notification came in, so kill that timer... */
3179         cancel_delayed_work(&priv->scan_check);
3180
3181         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3182                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
3183                                                         "2.4" : "5.2",
3184                        jiffies_to_msecs(elapsed_jiffies
3185                                         (priv->scan_pass_start, jiffies)));
3186
3187         /* Remove this scanned band from the list of pending
3188          * bands to scan, band G precedes A in order of scanning
3189          * as seen in iwl3945_bg_request_scan */
3190         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
3191                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
3192         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
3193                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
3194
3195         /* If a request to abort was given, or the scan did not succeed
3196          * then we reset the scan state machine and terminate,
3197          * re-queuing another scan if one has been requested */
3198         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3199                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3200                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3201         } else {
3202                 /* If there are more bands on this scan pass reschedule */
3203                 if (priv->scan_bands > 0)
3204                         goto reschedule;
3205         }
3206
3207         priv->last_scan_jiffies = jiffies;
3208         priv->next_scan_jiffies = 0;
3209         IWL_DEBUG_INFO("Setting scan to off\n");
3210
3211         clear_bit(STATUS_SCANNING, &priv->status);
3212
3213         IWL_DEBUG_INFO("Scan took %dms\n",
3214                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3215
3216         queue_work(priv->workqueue, &priv->scan_completed);
3217
3218         return;
3219
3220 reschedule:
3221         priv->scan_pass_start = jiffies;
3222         queue_work(priv->workqueue, &priv->request_scan);
3223 }
3224
3225 /* Handle notification from uCode that card's power state is changing
3226  * due to software, hardware, or critical temperature RFKILL */
3227 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3228                                     struct iwl3945_rx_mem_buffer *rxb)
3229 {
3230         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3231         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3232         unsigned long status = priv->status;
3233
3234         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3235                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3236                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3237
3238         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3239                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3240
3241         if (flags & HW_CARD_DISABLED)
3242                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3243         else
3244                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3245
3246
3247         if (flags & SW_CARD_DISABLED)
3248                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3249         else
3250                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3251
3252         iwl3945_scan_cancel(priv);
3253
3254         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3255              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3256             (test_bit(STATUS_RF_KILL_SW, &status) !=
3257              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3258                 queue_work(priv->workqueue, &priv->rf_kill);
3259         else
3260                 wake_up_interruptible(&priv->wait_command_queue);
3261 }
3262
3263 /**
3264  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3265  *
3266  * Setup the RX handlers for each of the reply types sent from the uCode
3267  * to the host.
3268  *
3269  * This function chains into the hardware specific files for them to setup
3270  * any hardware specific handlers as well.
3271  */
3272 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3273 {
3274         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3275         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3276         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3277         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3278         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3279             iwl3945_rx_spectrum_measure_notif;
3280         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3281         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3282             iwl3945_rx_pm_debug_statistics_notif;
3283         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3284
3285         /*
3286          * The same handler is used for both the REPLY to a discrete
3287          * statistics request from the host as well as for the periodic
3288          * statistics notifications (after received beacons) from the uCode.
3289          */
3290         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3291         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3292
3293         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3294         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3295         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3296             iwl3945_rx_scan_results_notif;
3297         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3298             iwl3945_rx_scan_complete_notif;
3299         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3300
3301         /* Set up hardware specific Rx handlers */
3302         iwl3945_hw_rx_handler_setup(priv);
3303 }
3304
3305 /**
3306  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3307  * When FW advances 'R' index, all entries between old and new 'R' index
3308  * need to be reclaimed.
3309  */
3310 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3311                                       int txq_id, int index)
3312 {
3313         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3314         struct iwl3945_queue *q = &txq->q;
3315         int nfreed = 0;
3316
3317         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3318                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3319                           "is out of range [0-%d] %d %d.\n", txq_id,
3320                           index, q->n_bd, q->write_ptr, q->read_ptr);
3321                 return;
3322         }
3323
3324         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3325                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3326                 if (nfreed > 1) {
3327                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3328                                         q->write_ptr, q->read_ptr);
3329                         queue_work(priv->workqueue, &priv->restart);
3330                         break;
3331                 }
3332                 nfreed++;
3333         }
3334 }
3335
3336
3337 /**
3338  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3339  * @rxb: Rx buffer to reclaim
3340  *
3341  * If an Rx buffer has an async callback associated with it the callback
3342  * will be executed.  The attached skb (if present) will only be freed
3343  * if the callback returns 1
3344  */
3345 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3346                                 struct iwl3945_rx_mem_buffer *rxb)
3347 {
3348         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3349         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3350         int txq_id = SEQ_TO_QUEUE(sequence);
3351         int index = SEQ_TO_INDEX(sequence);
3352         int huge =  !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3353         int cmd_index;
3354         struct iwl3945_cmd *cmd;
3355
3356         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3357
3358         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3359         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3360
3361         /* Input error checking is done when commands are added to queue. */
3362         if (cmd->meta.flags & CMD_WANT_SKB) {
3363                 cmd->meta.source->u.skb = rxb->skb;
3364                 rxb->skb = NULL;
3365         } else if (cmd->meta.u.callback &&
3366                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3367                 rxb->skb = NULL;
3368
3369         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3370
3371         if (!(cmd->meta.flags & CMD_ASYNC)) {
3372                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3373                 wake_up_interruptible(&priv->wait_command_queue);
3374         }
3375 }
3376
3377 /************************** RX-FUNCTIONS ****************************/
3378 /*
3379  * Rx theory of operation
3380  *
3381  * The host allocates 32 DMA target addresses and passes the host address
3382  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3383  * 0 to 31
3384  *
3385  * Rx Queue Indexes
3386  * The host/firmware share two index registers for managing the Rx buffers.
3387  *
3388  * The READ index maps to the first position that the firmware may be writing
3389  * to -- the driver can read up to (but not including) this position and get
3390  * good data.
3391  * The READ index is managed by the firmware once the card is enabled.
3392  *
3393  * The WRITE index maps to the last position the driver has read from -- the
3394  * position preceding WRITE is the last slot the firmware can place a packet.
3395  *
3396  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3397  * WRITE = READ.
3398  *
3399  * During initialization, the host sets up the READ queue position to the first
3400  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3401  *
3402  * When the firmware places a packet in a buffer, it will advance the READ index
3403  * and fire the RX interrupt.  The driver can then query the READ index and
3404  * process as many packets as possible, moving the WRITE index forward as it
3405  * resets the Rx queue buffers with new memory.
3406  *
3407  * The management in the driver is as follows:
3408  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3409  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3410  *   to replenish the iwl->rxq->rx_free.
3411  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3412  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3413  *   'processed' and 'read' driver indexes as well)
3414  * + A received packet is processed and handed to the kernel network stack,
3415  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3416  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3417  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3418  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3419  *   were enough free buffers and RX_STALLED is set it is cleared.
3420  *
3421  *
3422  * Driver sequence:
3423  *
3424  * iwl3945_rx_queue_alloc()   Allocates rx_free
3425  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3426  *                            iwl3945_rx_queue_restock
3427  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3428  *                            queue, updates firmware pointers, and updates
3429  *                            the WRITE index.  If insufficient rx_free buffers
3430  *                            are available, schedules iwl3945_rx_replenish
3431  *
3432  * -- enable interrupts --
3433  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3434  *                            READ INDEX, detaching the SKB from the pool.
3435  *                            Moves the packet buffer from queue to rx_used.
3436  *                            Calls iwl3945_rx_queue_restock to refill any empty
3437  *                            slots.
3438  * ...
3439  *
3440  */
3441
3442 /**
3443  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3444  */
3445 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3446 {
3447         int s = q->read - q->write;
3448         if (s <= 0)
3449                 s += RX_QUEUE_SIZE;
3450         /* keep some buffer to not confuse full and empty queue */
3451         s -= 2;
3452         if (s < 0)
3453                 s = 0;
3454         return s;
3455 }
3456
3457 /**
3458  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3459  */
3460 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3461 {
3462         u32 reg = 0;
3463         int rc = 0;
3464         unsigned long flags;
3465
3466         spin_lock_irqsave(&q->lock, flags);
3467
3468         if (q->need_update == 0)
3469                 goto exit_unlock;
3470
3471         /* If power-saving is in use, make sure device is awake */
3472         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3473                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3474
3475                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3476                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3477                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3478                         goto exit_unlock;
3479                 }
3480
3481                 rc = iwl3945_grab_nic_access(priv);
3482                 if (rc)
3483                         goto exit_unlock;
3484
3485                 /* Device expects a multiple of 8 */
3486                 iwl3945_write_direct32(priv, FH39_RSCSR_CHNL0_WPTR,
3487                                      q->write & ~0x7);
3488                 iwl3945_release_nic_access(priv);
3489
3490         /* Else device is assumed to be awake */
3491         } else
3492                 /* Device expects a multiple of 8 */
3493                 iwl3945_write32(priv, FH39_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3494
3495
3496         q->need_update = 0;
3497
3498  exit_unlock:
3499         spin_unlock_irqrestore(&q->lock, flags);
3500         return rc;
3501 }
3502
3503 /**
3504  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3505  */
3506 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3507                                           dma_addr_t dma_addr)
3508 {
3509         return cpu_to_le32((u32)dma_addr);
3510 }
3511
3512 /**
3513  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3514  *
3515  * If there are slots in the RX queue that need to be restocked,
3516  * and we have free pre-allocated buffers, fill the ranks as much
3517  * as we can, pulling from rx_free.
3518  *
3519  * This moves the 'write' index forward to catch up with 'processed', and
3520  * also updates the memory address in the firmware to reference the new
3521  * target buffer.
3522  */
3523 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3524 {
3525         struct iwl3945_rx_queue *rxq = &priv->rxq;
3526         struct list_head *element;
3527         struct iwl3945_rx_mem_buffer *rxb;
3528         unsigned long flags;
3529         int write, rc;
3530
3531         spin_lock_irqsave(&rxq->lock, flags);
3532         write = rxq->write & ~0x7;
3533         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3534                 /* Get next free Rx buffer, remove from free list */
3535                 element = rxq->rx_free.next;
3536                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3537                 list_del(element);
3538
3539                 /* Point to Rx buffer via next RBD in circular buffer */
3540                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3541                 rxq->queue[rxq->write] = rxb;
3542                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3543                 rxq->free_count--;
3544         }
3545         spin_unlock_irqrestore(&rxq->lock, flags);
3546         /* If the pre-allocated buffer pool is dropping low, schedule to
3547          * refill it */
3548         if (rxq->free_count <= RX_LOW_WATERMARK)
3549                 queue_work(priv->workqueue, &priv->rx_replenish);
3550
3551
3552         /* If we've added more space for the firmware to place data, tell it.
3553          * Increment device's write pointer in multiples of 8. */
3554         if ((write != (rxq->write & ~0x7))
3555             || (abs(rxq->write - rxq->read) > 7)) {
3556                 spin_lock_irqsave(&rxq->lock, flags);
3557                 rxq->need_update = 1;
3558                 spin_unlock_irqrestore(&rxq->lock, flags);
3559                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3560                 if (rc)
3561                         return rc;
3562         }
3563
3564         return 0;
3565 }
3566
3567 /**
3568  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3569  *
3570  * When moving to rx_free an SKB is allocated for the slot.
3571  *
3572  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3573  * This is called as a scheduled work item (except for during initialization)
3574  */
3575 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3576 {
3577         struct iwl3945_rx_queue *rxq = &priv->rxq;
3578         struct list_head *element;
3579         struct iwl3945_rx_mem_buffer *rxb;
3580         unsigned long flags;
3581         spin_lock_irqsave(&rxq->lock, flags);
3582         while (!list_empty(&rxq->rx_used)) {
3583                 element = rxq->rx_used.next;
3584                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3585
3586                 /* Alloc a new receive buffer */
3587                 rxb->skb =
3588                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3589                 if (!rxb->skb) {
3590                         if (net_ratelimit())
3591                                 printk(KERN_CRIT DRV_NAME
3592                                        ": Can not allocate SKB buffers\n");
3593                         /* We don't reschedule replenish work here -- we will
3594                          * call the restock method and if it still needs
3595                          * more buffers it will schedule replenish */
3596                         break;
3597                 }
3598
3599                 /* If radiotap head is required, reserve some headroom here.
3600                  * The physical head count is a variable rx_stats->phy_count.
3601                  * We reserve 4 bytes here. Plus these extra bytes, the
3602                  * headroom of the physical head should be enough for the
3603                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3604                  */
3605                 skb_reserve(rxb->skb, 4);
3606
3607                 priv->alloc_rxb_skb++;
3608                 list_del(element);
3609
3610                 /* Get physical address of RB/SKB */
3611                 rxb->dma_addr =
3612                     pci_map_single(priv->pci_dev, rxb->skb->data,
3613                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3614                 list_add_tail(&rxb->list, &rxq->rx_free);
3615                 rxq->free_count++;
3616         }
3617         spin_unlock_irqrestore(&rxq->lock, flags);
3618 }
3619
3620 /*
3621  * this should be called while priv->lock is locked
3622  */
3623 static void __iwl3945_rx_replenish(void *data)
3624 {
3625         struct iwl3945_priv *priv = data;
3626
3627         iwl3945_rx_allocate(priv);
3628         iwl3945_rx_queue_restock(priv);
3629 }
3630
3631
3632 void iwl3945_rx_replenish(void *data)
3633 {
3634         struct iwl3945_priv *priv = data;
3635         unsigned long flags;
3636
3637         iwl3945_rx_allocate(priv);
3638
3639         spin_lock_irqsave(&priv->lock, flags);
3640         iwl3945_rx_queue_restock(priv);
3641         spin_unlock_irqrestore(&priv->lock, flags);
3642 }
3643
3644 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3645  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3646  * This free routine walks the list of POOL entries and if SKB is set to
3647  * non NULL it is unmapped and freed
3648  */
3649 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3650 {
3651         int i;
3652         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3653                 if (rxq->pool[i].skb != NULL) {
3654                         pci_unmap_single(priv->pci_dev,
3655                                          rxq->pool[i].dma_addr,
3656                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3657                         dev_kfree_skb(rxq->pool[i].skb);
3658                 }
3659         }
3660
3661         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3662                             rxq->dma_addr);
3663         rxq->bd = NULL;
3664 }
3665
3666 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3667 {
3668         struct iwl3945_rx_queue *rxq = &priv->rxq;
3669         struct pci_dev *dev = priv->pci_dev;
3670         int i;
3671
3672         spin_lock_init(&rxq->lock);
3673         INIT_LIST_HEAD(&rxq->rx_free);
3674         INIT_LIST_HEAD(&rxq->rx_used);
3675
3676         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3677         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3678         if (!rxq->bd)
3679                 return -ENOMEM;
3680
3681         /* Fill the rx_used queue with _all_ of the Rx buffers */
3682         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3683                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3684
3685         /* Set us so that we have processed and used all buffers, but have
3686          * not restocked the Rx queue with fresh buffers */
3687         rxq->read = rxq->write = 0;
3688         rxq->free_count = 0;
3689         rxq->need_update = 0;
3690         return 0;
3691 }
3692
3693 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3694 {
3695         unsigned long flags;
3696         int i;
3697         spin_lock_irqsave(&rxq->lock, flags);
3698         INIT_LIST_HEAD(&rxq->rx_free);
3699         INIT_LIST_HEAD(&rxq->rx_used);
3700         /* Fill the rx_used queue with _all_ of the Rx buffers */
3701         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3702                 /* In the reset function, these buffers may have been allocated
3703                  * to an SKB, so we need to unmap and free potential storage */
3704                 if (rxq->pool[i].skb != NULL) {
3705                         pci_unmap_single(priv->pci_dev,
3706                                          rxq->pool[i].dma_addr,
3707                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3708                         priv->alloc_rxb_skb--;
3709                         dev_kfree_skb(rxq->pool[i].skb);
3710                         rxq->pool[i].skb = NULL;
3711                 }
3712                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3713         }
3714
3715         /* Set us so that we have processed and used all buffers, but have
3716          * not restocked the Rx queue with fresh buffers */
3717         rxq->read = rxq->write = 0;
3718         rxq->free_count = 0;
3719         spin_unlock_irqrestore(&rxq->lock, flags);
3720 }
3721
3722 /* Convert linear signal-to-noise ratio into dB */
3723 static u8 ratio2dB[100] = {
3724 /*       0   1   2   3   4   5   6   7   8   9 */
3725          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3726         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3727         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3728         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3729         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3730         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3731         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3732         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3733         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3734         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3735 };
3736
3737 /* Calculates a relative dB value from a ratio of linear
3738  *   (i.e. not dB) signal levels.
3739  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3740 int iwl3945_calc_db_from_ratio(int sig_ratio)
3741 {
3742         /* 1000:1 or higher just report as 60 dB */
3743         if (sig_ratio >= 1000)
3744                 return 60;
3745
3746         /* 100:1 or higher, divide by 10 and use table,
3747          *   add 20 dB to make up for divide by 10 */
3748         if (sig_ratio >= 100)
3749                 return 20 + (int)ratio2dB[sig_ratio/10];
3750
3751         /* We shouldn't see this */
3752         if (sig_ratio < 1)
3753                 return 0;
3754
3755         /* Use table for ratios 1:1 - 99:1 */
3756         return (int)ratio2dB[sig_ratio];
3757 }
3758
3759 #define PERFECT_RSSI (-20) /* dBm */
3760 #define WORST_RSSI (-95)   /* dBm */
3761 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3762
3763 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3764  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3765  *   about formulas used below. */
3766 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3767 {
3768         int sig_qual;
3769         int degradation = PERFECT_RSSI - rssi_dbm;
3770
3771         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3772          * as indicator; formula is (signal dbm - noise dbm).
3773          * SNR at or above 40 is a great signal (100%).
3774          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3775          * Weakest usable signal is usually 10 - 15 dB SNR. */
3776         if (noise_dbm) {
3777                 if (rssi_dbm - noise_dbm >= 40)
3778                         return 100;
3779                 else if (rssi_dbm < noise_dbm)
3780                         return 0;
3781                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3782
3783         /* Else use just the signal level.
3784          * This formula is a least squares fit of data points collected and
3785          *   compared with a reference system that had a percentage (%) display
3786          *   for signal quality. */
3787         } else
3788                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3789                             (15 * RSSI_RANGE + 62 * degradation)) /
3790                            (RSSI_RANGE * RSSI_RANGE);
3791
3792         if (sig_qual > 100)
3793                 sig_qual = 100;
3794         else if (sig_qual < 1)
3795                 sig_qual = 0;
3796
3797         return sig_qual;
3798 }
3799
3800 /**
3801  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3802  *
3803  * Uses the priv->rx_handlers callback function array to invoke
3804  * the appropriate handlers, including command responses,
3805  * frame-received notifications, and other notifications.
3806  */
3807 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3808 {
3809         struct iwl3945_rx_mem_buffer *rxb;
3810         struct iwl3945_rx_packet *pkt;
3811         struct iwl3945_rx_queue *rxq = &priv->rxq;
3812         u32 r, i;
3813         int reclaim;
3814         unsigned long flags;
3815         u8 fill_rx = 0;
3816         u32 count = 8;
3817
3818         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3819          * buffer that the driver may process (last buffer filled by ucode). */
3820         r = iwl3945_hw_get_rx_read(priv);
3821         i = rxq->read;
3822
3823         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3824                 fill_rx = 1;
3825         /* Rx interrupt, but nothing sent from uCode */
3826         if (i == r)
3827                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3828
3829         while (i != r) {
3830                 rxb = rxq->queue[i];
3831
3832                 /* If an RXB doesn't have a Rx queue slot associated with it,
3833                  * then a bug has been introduced in the queue refilling
3834                  * routines -- catch it here */
3835                 BUG_ON(rxb == NULL);
3836
3837                 rxq->queue[i] = NULL;
3838
3839                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3840                                             IWL_RX_BUF_SIZE,
3841                                             PCI_DMA_FROMDEVICE);
3842                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3843
3844                 /* Reclaim a command buffer only if this packet is a response
3845                  *   to a (driver-originated) command.
3846                  * If the packet (e.g. Rx frame) originated from uCode,
3847                  *   there is no command buffer to reclaim.
3848                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3849                  *   but apparently a few don't get set; catch them here. */
3850                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3851                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3852                         (pkt->hdr.cmd != REPLY_TX);
3853
3854                 /* Based on type of command response or notification,
3855                  *   handle those that need handling via function in
3856                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
3857                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3858                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3859                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3860                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3861                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3862                 } else {
3863                         /* No handling needed */
3864                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3865                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3866                                 r, i, get_cmd_string(pkt->hdr.cmd),
3867                                 pkt->hdr.cmd);
3868                 }
3869
3870                 if (reclaim) {
3871                         /* Invoke any callbacks, transfer the skb to caller, and
3872                          * fire off the (possibly) blocking iwl3945_send_cmd()
3873                          * as we reclaim the driver command queue */
3874                         if (rxb && rxb->skb)
3875                                 iwl3945_tx_cmd_complete(priv, rxb);
3876                         else
3877                                 IWL_WARNING("Claim null rxb?\n");
3878                 }
3879
3880                 /* For now we just don't re-use anything.  We can tweak this
3881                  * later to try and re-use notification packets and SKBs that
3882                  * fail to Rx correctly */
3883                 if (rxb->skb != NULL) {
3884                         priv->alloc_rxb_skb--;
3885                         dev_kfree_skb_any(rxb->skb);
3886                         rxb->skb = NULL;
3887                 }
3888
3889                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3890                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3891                 spin_lock_irqsave(&rxq->lock, flags);
3892                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3893                 spin_unlock_irqrestore(&rxq->lock, flags);
3894                 i = (i + 1) & RX_QUEUE_MASK;
3895                 /* If there are a lot of unused frames,
3896                  * restock the Rx queue so ucode won't assert. */
3897                 if (fill_rx) {
3898                         count++;
3899                         if (count >= 8) {
3900                                 priv->rxq.read = i;
3901                                 __iwl3945_rx_replenish(priv);
3902                                 count = 0;
3903                         }
3904                 }
3905         }
3906
3907         /* Backtrack one entry */
3908         priv->rxq.read = i;
3909         iwl3945_rx_queue_restock(priv);
3910 }
3911
3912 /**
3913  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
3914  */
3915 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
3916                                   struct iwl3945_tx_queue *txq)
3917 {
3918         u32 reg = 0;
3919         int rc = 0;
3920         int txq_id = txq->q.id;
3921
3922         if (txq->need_update == 0)
3923                 return rc;
3924
3925         /* if we're trying to save power */
3926         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3927                 /* wake up nic if it's powered down ...
3928                  * uCode will wake up, and interrupt us again, so next
3929                  * time we'll skip this part. */
3930                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3931
3932                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3933                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3934                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3935                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3936                         return rc;
3937                 }
3938
3939                 /* restore this queue's parameters in nic hardware. */
3940                 rc = iwl3945_grab_nic_access(priv);
3941                 if (rc)
3942                         return rc;
3943                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
3944                                      txq->q.write_ptr | (txq_id << 8));
3945                 iwl3945_release_nic_access(priv);
3946
3947         /* else not in power-save mode, uCode will never sleep when we're
3948          * trying to tx (during RFKILL, we're not trying to tx). */
3949         } else
3950                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
3951                             txq->q.write_ptr | (txq_id << 8));
3952
3953         txq->need_update = 0;
3954
3955         return rc;
3956 }
3957
3958 #ifdef CONFIG_IWL3945_DEBUG
3959 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
3960 {
3961         IWL_DEBUG_RADIO("RX CONFIG:\n");
3962         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3963         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3964         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3965         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3966                         le32_to_cpu(rxon->filter_flags));
3967         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3968         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3969                         rxon->ofdm_basic_rates);
3970         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3971         IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
3972         IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
3973         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3974 }
3975 #endif
3976
3977 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
3978 {
3979         IWL_DEBUG_ISR("Enabling interrupts\n");
3980         set_bit(STATUS_INT_ENABLED, &priv->status);
3981         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3982 }
3983
3984
3985 /* call this function to flush any scheduled tasklet */
3986 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
3987 {
3988         /* wait to make sure we flush pending tasklet*/
3989         synchronize_irq(priv->pci_dev->irq);
3990         tasklet_kill(&priv->irq_tasklet);
3991 }
3992
3993
3994 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
3995 {
3996         clear_bit(STATUS_INT_ENABLED, &priv->status);
3997
3998         /* disable interrupts from uCode/NIC to host */
3999         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4000
4001         /* acknowledge/clear/reset any interrupts still pending
4002          * from uCode or flow handler (Rx/Tx DMA) */
4003         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4004         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4005         IWL_DEBUG_ISR("Disabled interrupts\n");
4006 }
4007
4008 static const char *desc_lookup(int i)
4009 {
4010         switch (i) {
4011         case 1:
4012                 return "FAIL";
4013         case 2:
4014                 return "BAD_PARAM";
4015         case 3:
4016                 return "BAD_CHECKSUM";
4017         case 4:
4018                 return "NMI_INTERRUPT";
4019         case 5:
4020                 return "SYSASSERT";
4021         case 6:
4022                 return "FATAL_ERROR";
4023         }
4024
4025         return "UNKNOWN";
4026 }
4027
4028 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4029 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4030
4031 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4032 {
4033         u32 i;
4034         u32 desc, time, count, base, data1;
4035         u32 blink1, blink2, ilink1, ilink2;
4036         int rc;
4037
4038         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4039
4040         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4041                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4042                 return;
4043         }
4044
4045         rc = iwl3945_grab_nic_access(priv);
4046         if (rc) {
4047                 IWL_WARNING("Can not read from adapter at this time.\n");
4048                 return;
4049         }
4050
4051         count = iwl3945_read_targ_mem(priv, base);
4052
4053         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4054                 IWL_ERROR("Start IWL Error Log Dump:\n");
4055                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4056         }
4057
4058         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4059                   "ilink1  nmiPC   Line\n");
4060         for (i = ERROR_START_OFFSET;
4061              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4062              i += ERROR_ELEM_SIZE) {
4063                 desc = iwl3945_read_targ_mem(priv, base + i);
4064                 time =
4065                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4066                 blink1 =
4067                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4068                 blink2 =
4069                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4070                 ilink1 =
4071                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4072                 ilink2 =
4073                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4074                 data1 =
4075                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4076
4077                 IWL_ERROR
4078                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4079                      desc_lookup(desc), desc, time, blink1, blink2,
4080                      ilink1, ilink2, data1);
4081         }
4082
4083         iwl3945_release_nic_access(priv);
4084
4085 }
4086
4087 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4088
4089 /**
4090  * iwl3945_print_event_log - Dump error event log to syslog
4091  *
4092  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4093  */
4094 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4095                                 u32 num_events, u32 mode)
4096 {
4097         u32 i;
4098         u32 base;       /* SRAM byte address of event log header */
4099         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4100         u32 ptr;        /* SRAM byte address of log data */
4101         u32 ev, time, data; /* event log data */
4102
4103         if (num_events == 0)
4104                 return;
4105
4106         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4107
4108         if (mode == 0)
4109                 event_size = 2 * sizeof(u32);
4110         else
4111                 event_size = 3 * sizeof(u32);
4112
4113         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4114
4115         /* "time" is actually "data" for mode 0 (no timestamp).
4116          * place event id # at far right for easier visual parsing. */
4117         for (i = 0; i < num_events; i++) {
4118                 ev = iwl3945_read_targ_mem(priv, ptr);
4119                 ptr += sizeof(u32);
4120                 time = iwl3945_read_targ_mem(priv, ptr);
4121                 ptr += sizeof(u32);
4122                 if (mode == 0)
4123                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4124                 else {
4125                         data = iwl3945_read_targ_mem(priv, ptr);
4126                         ptr += sizeof(u32);
4127                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4128                 }
4129         }
4130 }
4131
4132 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4133 {
4134         int rc;
4135         u32 base;       /* SRAM byte address of event log header */
4136         u32 capacity;   /* event log capacity in # entries */
4137         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4138         u32 num_wraps;  /* # times uCode wrapped to top of log */
4139         u32 next_entry; /* index of next entry to be written by uCode */
4140         u32 size;       /* # entries that we'll print */
4141
4142         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4143         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4144                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4145                 return;
4146         }
4147
4148         rc = iwl3945_grab_nic_access(priv);
4149         if (rc) {
4150                 IWL_WARNING("Can not read from adapter at this time.\n");
4151                 return;
4152         }
4153
4154         /* event log header */
4155         capacity = iwl3945_read_targ_mem(priv, base);
4156         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4157         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4158         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4159
4160         size = num_wraps ? capacity : next_entry;
4161
4162         /* bail out if nothing in log */
4163         if (size == 0) {
4164                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4165                 iwl3945_release_nic_access(priv);
4166                 return;
4167         }
4168
4169         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4170                   size, num_wraps);
4171
4172         /* if uCode has wrapped back to top of log, start at the oldest entry,
4173          * i.e the next one that uCode would fill. */
4174         if (num_wraps)
4175                 iwl3945_print_event_log(priv, next_entry,
4176                                     capacity - next_entry, mode);
4177
4178         /* (then/else) start at top of log */
4179         iwl3945_print_event_log(priv, 0, next_entry, mode);
4180
4181         iwl3945_release_nic_access(priv);
4182 }
4183
4184 /**
4185  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4186  */
4187 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4188 {
4189         /* Set the FW error flag -- cleared on iwl3945_down */
4190         set_bit(STATUS_FW_ERROR, &priv->status);
4191
4192         /* Cancel currently queued command. */
4193         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4194
4195 #ifdef CONFIG_IWL3945_DEBUG
4196         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4197                 iwl3945_dump_nic_error_log(priv);
4198                 iwl3945_dump_nic_event_log(priv);
4199                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4200         }
4201 #endif
4202
4203         wake_up_interruptible(&priv->wait_command_queue);
4204
4205         /* Keep the restart process from trying to send host
4206          * commands by clearing the INIT status bit */
4207         clear_bit(STATUS_READY, &priv->status);
4208
4209         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4210                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4211                           "Restarting adapter due to uCode error.\n");
4212
4213                 if (iwl3945_is_associated(priv)) {
4214                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4215                                sizeof(priv->recovery_rxon));
4216                         priv->error_recovering = 1;
4217                 }
4218                 queue_work(priv->workqueue, &priv->restart);
4219         }
4220 }
4221
4222 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4223 {
4224         unsigned long flags;
4225
4226         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4227                sizeof(priv->staging_rxon));
4228         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4229         iwl3945_commit_rxon(priv);
4230
4231         iwl3945_add_station(priv, priv->bssid, 1, 0);
4232
4233         spin_lock_irqsave(&priv->lock, flags);
4234         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4235         priv->error_recovering = 0;
4236         spin_unlock_irqrestore(&priv->lock, flags);
4237 }
4238
4239 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4240 {
4241         u32 inta, handled = 0;
4242         u32 inta_fh;
4243         unsigned long flags;
4244 #ifdef CONFIG_IWL3945_DEBUG
4245         u32 inta_mask;
4246 #endif
4247
4248         spin_lock_irqsave(&priv->lock, flags);
4249
4250         /* Ack/clear/reset pending uCode interrupts.
4251          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4252          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4253         inta = iwl3945_read32(priv, CSR_INT);
4254         iwl3945_write32(priv, CSR_INT, inta);
4255
4256         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4257          * Any new interrupts that happen after this, either while we're
4258          * in this tasklet, or later, will show up in next ISR/tasklet. */
4259         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4260         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4261
4262 #ifdef CONFIG_IWL3945_DEBUG
4263         if (iwl3945_debug_level & IWL_DL_ISR) {
4264                 /* just for debug */
4265                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4266                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4267                               inta, inta_mask, inta_fh);
4268         }
4269 #endif
4270
4271         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4272          * atomic, make sure that inta covers all the interrupts that
4273          * we've discovered, even if FH interrupt came in just after
4274          * reading CSR_INT. */
4275         if (inta_fh & CSR39_FH_INT_RX_MASK)
4276                 inta |= CSR_INT_BIT_FH_RX;
4277         if (inta_fh & CSR39_FH_INT_TX_MASK)
4278                 inta |= CSR_INT_BIT_FH_TX;
4279
4280         /* Now service all interrupt bits discovered above. */
4281         if (inta & CSR_INT_BIT_HW_ERR) {
4282                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4283
4284                 /* Tell the device to stop sending interrupts */
4285                 iwl3945_disable_interrupts(priv);
4286
4287                 iwl3945_irq_handle_error(priv);
4288
4289                 handled |= CSR_INT_BIT_HW_ERR;
4290
4291                 spin_unlock_irqrestore(&priv->lock, flags);
4292
4293                 return;
4294         }
4295
4296 #ifdef CONFIG_IWL3945_DEBUG
4297         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4298                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4299                 if (inta & CSR_INT_BIT_SCD)
4300                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4301                                       "the frame/frames.\n");
4302
4303                 /* Alive notification via Rx interrupt will do the real work */
4304                 if (inta & CSR_INT_BIT_ALIVE)
4305                         IWL_DEBUG_ISR("Alive interrupt\n");
4306         }
4307 #endif
4308         /* Safely ignore these bits for debug checks below */
4309         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4310
4311         /* Error detected by uCode */
4312         if (inta & CSR_INT_BIT_SW_ERR) {
4313                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4314                           inta);
4315                 iwl3945_irq_handle_error(priv);
4316                 handled |= CSR_INT_BIT_SW_ERR;
4317         }
4318
4319         /* uCode wakes up after power-down sleep */
4320         if (inta & CSR_INT_BIT_WAKEUP) {
4321                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4322                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4323                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4324                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4325                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4326                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4327                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4328                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4329
4330                 handled |= CSR_INT_BIT_WAKEUP;
4331         }
4332
4333         /* All uCode command responses, including Tx command responses,
4334          * Rx "responses" (frame-received notification), and other
4335          * notifications from uCode come through here*/
4336         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4337                 iwl3945_rx_handle(priv);
4338                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4339         }
4340
4341         if (inta & CSR_INT_BIT_FH_TX) {
4342                 IWL_DEBUG_ISR("Tx interrupt\n");
4343
4344                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4345                 if (!iwl3945_grab_nic_access(priv)) {
4346                         iwl3945_write_direct32(priv, FH39_TCSR_CREDIT
4347                                              (FH39_SRVC_CHNL), 0x0);
4348                         iwl3945_release_nic_access(priv);
4349                 }
4350                 handled |= CSR_INT_BIT_FH_TX;
4351         }
4352
4353         if (inta & ~handled)
4354                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4355
4356         if (inta & ~CSR_INI_SET_MASK) {
4357                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4358                          inta & ~CSR_INI_SET_MASK);
4359                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4360         }
4361
4362         /* Re-enable all interrupts */
4363         /* only Re-enable if disabled by irq */
4364         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4365                 iwl3945_enable_interrupts(priv);
4366
4367 #ifdef CONFIG_IWL3945_DEBUG
4368         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4369                 inta = iwl3945_read32(priv, CSR_INT);
4370                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4371                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4372                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4373                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4374         }
4375 #endif
4376         spin_unlock_irqrestore(&priv->lock, flags);
4377 }
4378
4379 static irqreturn_t iwl3945_isr(int irq, void *data)
4380 {
4381         struct iwl3945_priv *priv = data;
4382         u32 inta, inta_mask;
4383         u32 inta_fh;
4384         if (!priv)
4385                 return IRQ_NONE;
4386
4387         spin_lock(&priv->lock);
4388
4389         /* Disable (but don't clear!) interrupts here to avoid
4390          *    back-to-back ISRs and sporadic interrupts from our NIC.
4391          * If we have something to service, the tasklet will re-enable ints.
4392          * If we *don't* have something, we'll re-enable before leaving here. */
4393         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4394         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4395
4396         /* Discover which interrupts are active/pending */
4397         inta = iwl3945_read32(priv, CSR_INT);
4398         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4399
4400         /* Ignore interrupt if there's nothing in NIC to service.
4401          * This may be due to IRQ shared with another device,
4402          * or due to sporadic interrupts thrown from our NIC. */
4403         if (!inta && !inta_fh) {
4404                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4405                 goto none;
4406         }
4407
4408         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4409                 /* Hardware disappeared */
4410                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%08x\n", inta);
4411                 goto unplugged;
4412         }
4413
4414         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4415                       inta, inta_mask, inta_fh);
4416
4417         inta &= ~CSR_INT_BIT_SCD;
4418
4419         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4420         if (likely(inta || inta_fh))
4421                 tasklet_schedule(&priv->irq_tasklet);
4422 unplugged:
4423         spin_unlock(&priv->lock);
4424
4425         return IRQ_HANDLED;
4426
4427  none:
4428         /* re-enable interrupts here since we don't have anything to service. */
4429         /* only Re-enable if disabled by irq */
4430         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4431                 iwl3945_enable_interrupts(priv);
4432         spin_unlock(&priv->lock);
4433         return IRQ_NONE;
4434 }
4435
4436 /************************** EEPROM BANDS ****************************
4437  *
4438  * The iwl3945_eeprom_band definitions below provide the mapping from the
4439  * EEPROM contents to the specific channel number supported for each
4440  * band.
4441  *
4442  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4443  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4444  * The specific geography and calibration information for that channel
4445  * is contained in the eeprom map itself.
4446  *
4447  * During init, we copy the eeprom information and channel map
4448  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4449  *
4450  * channel_map_24/52 provides the index in the channel_info array for a
4451  * given channel.  We have to have two separate maps as there is channel
4452  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4453  * band_2
4454  *
4455  * A value of 0xff stored in the channel_map indicates that the channel
4456  * is not supported by the hardware at all.
4457  *
4458  * A value of 0xfe in the channel_map indicates that the channel is not
4459  * valid for Tx with the current hardware.  This means that
4460  * while the system can tune and receive on a given channel, it may not
4461  * be able to associate or transmit any frames on that
4462  * channel.  There is no corresponding channel information for that
4463  * entry.
4464  *
4465  *********************************************************************/
4466
4467 /* 2.4 GHz */
4468 static const u8 iwl3945_eeprom_band_1[14] = {
4469         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4470 };
4471
4472 /* 5.2 GHz bands */
4473 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4474         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4475 };
4476
4477 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4478         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4479 };
4480
4481 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4482         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4483 };
4484
4485 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4486         145, 149, 153, 157, 161, 165
4487 };
4488
4489 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4490                                     int *eeprom_ch_count,
4491                                     const struct iwl3945_eeprom_channel
4492                                     **eeprom_ch_info,
4493                                     const u8 **eeprom_ch_index)
4494 {
4495         switch (band) {
4496         case 1:         /* 2.4GHz band */
4497                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4498                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4499                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4500                 break;
4501         case 2:         /* 4.9GHz band */
4502                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4503                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4504                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4505                 break;
4506         case 3:         /* 5.2GHz band */
4507                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4508                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4509                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4510                 break;
4511         case 4:         /* 5.5GHz band */
4512                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4513                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4514                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4515                 break;
4516         case 5:         /* 5.7GHz band */
4517                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4518                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4519                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4520                 break;
4521         default:
4522                 BUG();
4523                 return;
4524         }
4525 }
4526
4527 /**
4528  * iwl3945_get_channel_info - Find driver's private channel info
4529  *
4530  * Based on band and channel number.
4531  */
4532 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4533                                                     enum ieee80211_band band, u16 channel)
4534 {
4535         int i;
4536
4537         switch (band) {
4538         case IEEE80211_BAND_5GHZ:
4539                 for (i = 14; i < priv->channel_count; i++) {
4540                         if (priv->channel_info[i].channel == channel)
4541                                 return &priv->channel_info[i];
4542                 }
4543                 break;
4544
4545         case IEEE80211_BAND_2GHZ:
4546                 if (channel >= 1 && channel <= 14)
4547                         return &priv->channel_info[channel - 1];
4548                 break;
4549         case IEEE80211_NUM_BANDS:
4550                 WARN_ON(1);
4551         }
4552
4553         return NULL;
4554 }
4555
4556 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4557                             ? # x " " : "")
4558
4559 /**
4560  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4561  */
4562 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4563 {
4564         int eeprom_ch_count = 0;
4565         const u8 *eeprom_ch_index = NULL;
4566         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4567         int band, ch;
4568         struct iwl3945_channel_info *ch_info;
4569
4570         if (priv->channel_count) {
4571                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4572                 return 0;
4573         }
4574
4575         if (priv->eeprom.version < 0x2f) {
4576                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4577                             priv->eeprom.version);
4578                 return -EINVAL;
4579         }
4580
4581         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4582
4583         priv->channel_count =
4584             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4585             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4586             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4587             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4588             ARRAY_SIZE(iwl3945_eeprom_band_5);
4589
4590         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4591
4592         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4593                                      priv->channel_count, GFP_KERNEL);
4594         if (!priv->channel_info) {
4595                 IWL_ERROR("Could not allocate channel_info\n");
4596                 priv->channel_count = 0;
4597                 return -ENOMEM;
4598         }
4599
4600         ch_info = priv->channel_info;
4601
4602         /* Loop through the 5 EEPROM bands adding them in order to the
4603          * channel map we maintain (that contains additional information than
4604          * what just in the EEPROM) */
4605         for (band = 1; band <= 5; band++) {
4606
4607                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4608                                         &eeprom_ch_info, &eeprom_ch_index);
4609
4610                 /* Loop through each band adding each of the channels */
4611                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4612                         ch_info->channel = eeprom_ch_index[ch];
4613                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4614                             IEEE80211_BAND_5GHZ;
4615
4616                         /* permanently store EEPROM's channel regulatory flags
4617                          *   and max power in channel info database. */
4618                         ch_info->eeprom = eeprom_ch_info[ch];
4619
4620                         /* Copy the run-time flags so they are there even on
4621                          * invalid channels */
4622                         ch_info->flags = eeprom_ch_info[ch].flags;
4623
4624                         if (!(is_channel_valid(ch_info))) {
4625                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4626                                                "No traffic\n",
4627                                                ch_info->channel,
4628                                                ch_info->flags,
4629                                                is_channel_a_band(ch_info) ?
4630                                                "5.2" : "2.4");
4631                                 ch_info++;
4632                                 continue;
4633                         }
4634
4635                         /* Initialize regulatory-based run-time data */
4636                         ch_info->max_power_avg = ch_info->curr_txpow =
4637                             eeprom_ch_info[ch].max_power_avg;
4638                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4639                         ch_info->min_power = 0;
4640
4641                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
4642                                        " %ddBm): Ad-Hoc %ssupported\n",
4643                                        ch_info->channel,
4644                                        is_channel_a_band(ch_info) ?
4645                                        "5.2" : "2.4",
4646                                        CHECK_AND_PRINT(VALID),
4647                                        CHECK_AND_PRINT(IBSS),
4648                                        CHECK_AND_PRINT(ACTIVE),
4649                                        CHECK_AND_PRINT(RADAR),
4650                                        CHECK_AND_PRINT(WIDE),
4651                                        CHECK_AND_PRINT(DFS),
4652                                        eeprom_ch_info[ch].flags,
4653                                        eeprom_ch_info[ch].max_power_avg,
4654                                        ((eeprom_ch_info[ch].
4655                                          flags & EEPROM_CHANNEL_IBSS)
4656                                         && !(eeprom_ch_info[ch].
4657                                              flags & EEPROM_CHANNEL_RADAR))
4658                                        ? "" : "not ");
4659
4660                         /* Set the user_txpower_limit to the highest power
4661                          * supported by any channel */
4662                         if (eeprom_ch_info[ch].max_power_avg >
4663                             priv->user_txpower_limit)
4664                                 priv->user_txpower_limit =
4665                                     eeprom_ch_info[ch].max_power_avg;
4666
4667                         ch_info++;
4668                 }
4669         }
4670
4671         /* Set up txpower settings in driver for all channels */
4672         if (iwl3945_txpower_set_from_eeprom(priv))
4673                 return -EIO;
4674
4675         return 0;
4676 }
4677
4678 /*
4679  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4680  */
4681 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4682 {
4683         kfree(priv->channel_info);
4684         priv->channel_count = 0;
4685 }
4686
4687 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4688  * sending probe req.  This should be set long enough to hear probe responses
4689  * from more than one AP.  */
4690 #define IWL_ACTIVE_DWELL_TIME_24    (30)        /* all times in msec */
4691 #define IWL_ACTIVE_DWELL_TIME_52    (20)
4692
4693 #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
4694 #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
4695
4696 /* For faster active scanning, scan will move to the next channel if fewer than
4697  * PLCP_QUIET_THRESH packets are heard on this channel within
4698  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4699  * time if it's a quiet channel (nothing responded to our probe, and there's
4700  * no other traffic).
4701  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4702 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4703 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(10)  /* msec */
4704
4705 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4706  * Must be set longer than active dwell time.
4707  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4708 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4709 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4710 #define IWL_PASSIVE_DWELL_BASE      (100)
4711 #define IWL_CHANNEL_TUNE_TIME       5
4712
4713 #define IWL_SCAN_PROBE_MASK(n)   (BIT(n) | (BIT(n) - BIT(1)))
4714
4715 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4716                                                 enum ieee80211_band band,
4717                                                 u8 n_probes)
4718 {
4719         if (band == IEEE80211_BAND_5GHZ)
4720                 return IWL_ACTIVE_DWELL_TIME_52 +
4721                         IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
4722         else
4723                 return IWL_ACTIVE_DWELL_TIME_24 +
4724                         IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
4725 }
4726
4727 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4728                                           enum ieee80211_band band)
4729 {
4730         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4731             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4732             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4733
4734         if (iwl3945_is_associated(priv)) {
4735                 /* If we're associated, we clamp the maximum passive
4736                  * dwell time to be 98% of the beacon interval (minus
4737                  * 2 * channel tune time) */
4738                 passive = priv->beacon_int;
4739                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4740                         passive = IWL_PASSIVE_DWELL_BASE;
4741                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4742         }
4743
4744         return passive;
4745 }
4746
4747 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4748                                          enum ieee80211_band band,
4749                                      u8 is_active, u8 n_probes,
4750                                      struct iwl3945_scan_channel *scan_ch)
4751 {
4752         const struct ieee80211_channel *channels = NULL;
4753         const struct ieee80211_supported_band *sband;
4754         const struct iwl3945_channel_info *ch_info;
4755         u16 passive_dwell = 0;
4756         u16 active_dwell = 0;
4757         int added, i;
4758
4759         sband = iwl3945_get_band(priv, band);
4760         if (!sband)
4761                 return 0;
4762
4763         channels = sband->channels;
4764
4765         active_dwell = iwl3945_get_active_dwell_time(priv, band, n_probes);
4766         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4767
4768         if (passive_dwell <= active_dwell)
4769                 passive_dwell = active_dwell + 1;
4770
4771         for (i = 0, added = 0; i < sband->n_channels; i++) {
4772                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4773                         continue;
4774
4775                 scan_ch->channel = channels[i].hw_value;
4776
4777                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4778                 if (!is_channel_valid(ch_info)) {
4779                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
4780                                        scan_ch->channel);
4781                         continue;
4782                 }
4783
4784                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4785                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4786                 /* If passive , set up for auto-switch
4787                  *  and use long active_dwell time.
4788                  */
4789                 if (!is_active || is_channel_passive(ch_info) ||
4790                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
4791                         scan_ch->type = 0;      /* passive */
4792                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
4793                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
4794                 } else {
4795                         scan_ch->type = 1;      /* active */
4796                 }
4797
4798                 /* Set direct probe bits. These may be used both for active
4799                  * scan channels (probes gets sent right away),
4800                  * or for passive channels (probes get se sent only after
4801                  * hearing clear Rx packet).*/
4802                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
4803                         if (n_probes)
4804                                 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4805                 } else {
4806                         /* uCode v1 does not allow setting direct probe bits on
4807                          * passive channel. */
4808                         if ((scan_ch->type & 1) && n_probes)
4809                                 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4810                 }
4811
4812                 /* Set txpower levels to defaults */
4813                 scan_ch->tpc.dsp_atten = 110;
4814                 /* scan_pwr_info->tpc.dsp_atten; */
4815
4816                 /*scan_pwr_info->tpc.tx_gain; */
4817                 if (band == IEEE80211_BAND_5GHZ)
4818                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4819                 else {
4820                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4821                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4822                          * power level:
4823                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4824                          */
4825                 }
4826
4827                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4828                                scan_ch->channel,
4829                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4830                                (scan_ch->type & 1) ?
4831                                active_dwell : passive_dwell);
4832
4833                 scan_ch++;
4834                 added++;
4835         }
4836
4837         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4838         return added;
4839 }
4840
4841 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
4842                               struct ieee80211_rate *rates)
4843 {
4844         int i;
4845
4846         for (i = 0; i < IWL_RATE_COUNT; i++) {
4847                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
4848                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4849                 rates[i].hw_value_short = i;
4850                 rates[i].flags = 0;
4851                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4852                         /*
4853                          * If CCK != 1M then set short preamble rate flag.
4854                          */
4855                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
4856                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4857                 }
4858         }
4859 }
4860
4861 /**
4862  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
4863  */
4864 static int iwl3945_init_geos(struct iwl3945_priv *priv)
4865 {
4866         struct iwl3945_channel_info *ch;
4867         struct ieee80211_supported_band *sband;
4868         struct ieee80211_channel *channels;
4869         struct ieee80211_channel *geo_ch;
4870         struct ieee80211_rate *rates;
4871         int i = 0;
4872
4873         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4874             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4875                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4876                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4877                 return 0;
4878         }
4879
4880         channels = kzalloc(sizeof(struct ieee80211_channel) *
4881                            priv->channel_count, GFP_KERNEL);
4882         if (!channels)
4883                 return -ENOMEM;
4884
4885         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4886                         GFP_KERNEL);
4887         if (!rates) {
4888                 kfree(channels);
4889                 return -ENOMEM;
4890         }
4891
4892         /* 5.2GHz channels start after the 2.4GHz channels */
4893         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4894         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
4895         /* just OFDM */
4896         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4897         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4898
4899         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4900         sband->channels = channels;
4901         /* OFDM & CCK */
4902         sband->bitrates = rates;
4903         sband->n_bitrates = IWL_RATE_COUNT;
4904
4905         priv->ieee_channels = channels;
4906         priv->ieee_rates = rates;
4907
4908         iwl3945_init_hw_rates(priv, rates);
4909
4910         for (i = 0;  i < priv->channel_count; i++) {
4911                 ch = &priv->channel_info[i];
4912
4913                 /* FIXME: might be removed if scan is OK*/
4914                 if (!is_channel_valid(ch))
4915                         continue;
4916
4917                 if (is_channel_a_band(ch))
4918                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4919                 else
4920                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4921
4922                 geo_ch = &sband->channels[sband->n_channels++];
4923
4924                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4925                 geo_ch->max_power = ch->max_power_avg;
4926                 geo_ch->max_antenna_gain = 0xff;
4927                 geo_ch->hw_value = ch->channel;
4928
4929                 if (is_channel_valid(ch)) {
4930                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4931                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4932
4933                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4934                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4935
4936                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4937                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4938
4939                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4940                                 priv->max_channel_txpower_limit =
4941                                     ch->max_power_avg;
4942                 } else {
4943                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4944                 }
4945
4946                 /* Save flags for reg domain usage */
4947                 geo_ch->orig_flags = geo_ch->flags;
4948
4949                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4950                                 ch->channel, geo_ch->center_freq,
4951                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4952                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4953                                 "restricted" : "valid",
4954                                  geo_ch->flags);
4955         }
4956
4957         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4958              priv->cfg->sku & IWL_SKU_A) {
4959                 printk(KERN_INFO DRV_NAME
4960                        ": Incorrectly detected BG card as ABG.  Please send "
4961                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4962                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4963                  priv->cfg->sku &= ~IWL_SKU_A;
4964         }
4965
4966         printk(KERN_INFO DRV_NAME
4967                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4968                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4969                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4970
4971         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4972                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4973                         &priv->bands[IEEE80211_BAND_2GHZ];
4974         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4975                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4976                         &priv->bands[IEEE80211_BAND_5GHZ];
4977
4978         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4979
4980         return 0;
4981 }
4982
4983 /*
4984  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
4985  */
4986 static void iwl3945_free_geos(struct iwl3945_priv *priv)
4987 {
4988         kfree(priv->ieee_channels);
4989         kfree(priv->ieee_rates);
4990         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4991 }
4992
4993 /******************************************************************************
4994  *
4995  * uCode download functions
4996  *
4997  ******************************************************************************/
4998
4999 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5000 {
5001         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5002         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5003         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5004         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5005         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5006         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5007 }
5008
5009 /**
5010  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5011  *     looking at all data.
5012  */
5013 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 *image, u32 len)
5014 {
5015         u32 val;
5016         u32 save_len = len;
5017         int rc = 0;
5018         u32 errcnt;
5019
5020         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5021
5022         rc = iwl3945_grab_nic_access(priv);
5023         if (rc)
5024                 return rc;
5025
5026         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5027
5028         errcnt = 0;
5029         for (; len > 0; len -= sizeof(u32), image++) {
5030                 /* read data comes through single port, auto-incr addr */
5031                 /* NOTE: Use the debugless read so we don't flood kernel log
5032                  * if IWL_DL_IO is set */
5033                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5034                 if (val != le32_to_cpu(*image)) {
5035                         IWL_ERROR("uCode INST section is invalid at "
5036                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5037                                   save_len - len, val, le32_to_cpu(*image));
5038                         rc = -EIO;
5039                         errcnt++;
5040                         if (errcnt >= 20)
5041                                 break;
5042                 }
5043         }
5044
5045         iwl3945_release_nic_access(priv);
5046
5047         if (!errcnt)
5048                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5049
5050         return rc;
5051 }
5052
5053
5054 /**
5055  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5056  *   using sample data 100 bytes apart.  If these sample points are good,
5057  *   it's a pretty good bet that everything between them is good, too.
5058  */
5059 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5060 {
5061         u32 val;
5062         int rc = 0;
5063         u32 errcnt = 0;
5064         u32 i;
5065
5066         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5067
5068         rc = iwl3945_grab_nic_access(priv);
5069         if (rc)
5070                 return rc;
5071
5072         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5073                 /* read data comes through single port, auto-incr addr */
5074                 /* NOTE: Use the debugless read so we don't flood kernel log
5075                  * if IWL_DL_IO is set */
5076                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5077                         i + RTC_INST_LOWER_BOUND);
5078                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5079                 if (val != le32_to_cpu(*image)) {
5080 #if 0 /* Enable this if you want to see details */
5081                         IWL_ERROR("uCode INST section is invalid at "
5082                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5083                                   i, val, *image);
5084 #endif
5085                         rc = -EIO;
5086                         errcnt++;
5087                         if (errcnt >= 3)
5088                                 break;
5089                 }
5090         }
5091
5092         iwl3945_release_nic_access(priv);
5093
5094         return rc;
5095 }
5096
5097
5098 /**
5099  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5100  *    and verify its contents
5101  */
5102 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5103 {
5104         __le32 *image;
5105         u32 len;
5106         int rc = 0;
5107
5108         /* Try bootstrap */
5109         image = (__le32 *)priv->ucode_boot.v_addr;
5110         len = priv->ucode_boot.len;
5111         rc = iwl3945_verify_inst_sparse(priv, image, len);
5112         if (rc == 0) {
5113                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5114                 return 0;
5115         }
5116
5117         /* Try initialize */
5118         image = (__le32 *)priv->ucode_init.v_addr;
5119         len = priv->ucode_init.len;
5120         rc = iwl3945_verify_inst_sparse(priv, image, len);
5121         if (rc == 0) {
5122                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5123                 return 0;
5124         }
5125
5126         /* Try runtime/protocol */
5127         image = (__le32 *)priv->ucode_code.v_addr;
5128         len = priv->ucode_code.len;
5129         rc = iwl3945_verify_inst_sparse(priv, image, len);
5130         if (rc == 0) {
5131                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5132                 return 0;
5133         }
5134
5135         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5136
5137         /* Since nothing seems to match, show first several data entries in
5138          * instruction SRAM, so maybe visual inspection will give a clue.
5139          * Selection of bootstrap image (vs. other images) is arbitrary. */
5140         image = (__le32 *)priv->ucode_boot.v_addr;
5141         len = priv->ucode_boot.len;
5142         rc = iwl3945_verify_inst_full(priv, image, len);
5143
5144         return rc;
5145 }
5146
5147
5148 /* check contents of special bootstrap uCode SRAM */
5149 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5150 {
5151         __le32 *image = priv->ucode_boot.v_addr;
5152         u32 len = priv->ucode_boot.len;
5153         u32 reg;
5154         u32 val;
5155
5156         IWL_DEBUG_INFO("Begin verify bsm\n");
5157
5158         /* verify BSM SRAM contents */
5159         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5160         for (reg = BSM_SRAM_LOWER_BOUND;
5161              reg < BSM_SRAM_LOWER_BOUND + len;
5162              reg += sizeof(u32), image++) {
5163                 val = iwl3945_read_prph(priv, reg);
5164                 if (val != le32_to_cpu(*image)) {
5165                         IWL_ERROR("BSM uCode verification failed at "
5166                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5167                                   BSM_SRAM_LOWER_BOUND,
5168                                   reg - BSM_SRAM_LOWER_BOUND, len,
5169                                   val, le32_to_cpu(*image));
5170                         return -EIO;
5171                 }
5172         }
5173
5174         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5175
5176         return 0;
5177 }
5178
5179 /**
5180  * iwl3945_load_bsm - Load bootstrap instructions
5181  *
5182  * BSM operation:
5183  *
5184  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5185  * in special SRAM that does not power down during RFKILL.  When powering back
5186  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5187  * the bootstrap program into the on-board processor, and starts it.
5188  *
5189  * The bootstrap program loads (via DMA) instructions and data for a new
5190  * program from host DRAM locations indicated by the host driver in the
5191  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5192  * automatically.
5193  *
5194  * When initializing the NIC, the host driver points the BSM to the
5195  * "initialize" uCode image.  This uCode sets up some internal data, then
5196  * notifies host via "initialize alive" that it is complete.
5197  *
5198  * The host then replaces the BSM_DRAM_* pointer values to point to the
5199  * normal runtime uCode instructions and a backup uCode data cache buffer
5200  * (filled initially with starting data values for the on-board processor),
5201  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5202  * which begins normal operation.
5203  *
5204  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5205  * the backup data cache in DRAM before SRAM is powered down.
5206  *
5207  * When powering back up, the BSM loads the bootstrap program.  This reloads
5208  * the runtime uCode instructions and the backup data cache into SRAM,
5209  * and re-launches the runtime uCode from where it left off.
5210  */
5211 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5212 {
5213         __le32 *image = priv->ucode_boot.v_addr;
5214         u32 len = priv->ucode_boot.len;
5215         dma_addr_t pinst;
5216         dma_addr_t pdata;
5217         u32 inst_len;
5218         u32 data_len;
5219         int rc;
5220         int i;
5221         u32 done;
5222         u32 reg_offset;
5223
5224         IWL_DEBUG_INFO("Begin load bsm\n");
5225
5226         /* make sure bootstrap program is no larger than BSM's SRAM size */
5227         if (len > IWL_MAX_BSM_SIZE)
5228                 return -EINVAL;
5229
5230         /* Tell bootstrap uCode where to find the "Initialize" uCode
5231          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5232          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5233          *        after the "initialize" uCode has run, to point to
5234          *        runtime/protocol instructions and backup data cache. */
5235         pinst = priv->ucode_init.p_addr;
5236         pdata = priv->ucode_init_data.p_addr;
5237         inst_len = priv->ucode_init.len;
5238         data_len = priv->ucode_init_data.len;
5239
5240         rc = iwl3945_grab_nic_access(priv);
5241         if (rc)
5242                 return rc;
5243
5244         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5245         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5246         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5247         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5248
5249         /* Fill BSM memory with bootstrap instructions */
5250         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5251              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5252              reg_offset += sizeof(u32), image++)
5253                 _iwl3945_write_prph(priv, reg_offset,
5254                                           le32_to_cpu(*image));
5255
5256         rc = iwl3945_verify_bsm(priv);
5257         if (rc) {
5258                 iwl3945_release_nic_access(priv);
5259                 return rc;
5260         }
5261
5262         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5263         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5264         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5265                                  RTC_INST_LOWER_BOUND);
5266         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5267
5268         /* Load bootstrap code into instruction SRAM now,
5269          *   to prepare to load "initialize" uCode */
5270         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5271                 BSM_WR_CTRL_REG_BIT_START);
5272
5273         /* Wait for load of bootstrap uCode to finish */
5274         for (i = 0; i < 100; i++) {
5275                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5276                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5277                         break;
5278                 udelay(10);
5279         }
5280         if (i < 100)
5281                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5282         else {
5283                 IWL_ERROR("BSM write did not complete!\n");
5284                 return -EIO;
5285         }
5286
5287         /* Enable future boot loads whenever power management unit triggers it
5288          *   (e.g. when powering back up after power-save shutdown) */
5289         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5290                 BSM_WR_CTRL_REG_BIT_START_EN);
5291
5292         iwl3945_release_nic_access(priv);
5293
5294         return 0;
5295 }
5296
5297 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5298 {
5299         /* Remove all resets to allow NIC to operate */
5300         iwl3945_write32(priv, CSR_RESET, 0);
5301 }
5302
5303 /**
5304  * iwl3945_read_ucode - Read uCode images from disk file.
5305  *
5306  * Copy into buffers for card to fetch via bus-mastering
5307  */
5308 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5309 {
5310         struct iwl3945_ucode *ucode;
5311         int ret = -EINVAL, index;
5312         const struct firmware *ucode_raw;
5313         /* firmware file name contains uCode/driver compatibility version */
5314         const char *name_pre = priv->cfg->fw_name_pre;
5315         const unsigned int api_max = priv->cfg->ucode_api_max;
5316         const unsigned int api_min = priv->cfg->ucode_api_min;
5317         char buf[25];
5318         u8 *src;
5319         size_t len;
5320         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
5321
5322         /* Ask kernel firmware_class module to get the boot firmware off disk.
5323          * request_firmware() is synchronous, file is in memory on return. */
5324         for (index = api_max; index >= api_min; index--) {
5325                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
5326                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
5327                 if (ret < 0) {
5328                         IWL_ERROR("%s firmware file req failed: Reason %d\n",
5329                                   buf, ret);
5330                         if (ret == -ENOENT)
5331                                 continue;
5332                         else
5333                                 goto error;
5334                 } else {
5335                         if (index < api_max)
5336                                 IWL_ERROR("Loaded firmware %s, which is deprecated. Please use API v%u instead.\n",
5337                                           buf, api_max);
5338                         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5339                                        buf, ucode_raw->size);
5340                         break;
5341                 }
5342         }
5343
5344         if (ret < 0)
5345                 goto error;
5346
5347         /* Make sure that we got at least our header! */
5348         if (ucode_raw->size < sizeof(*ucode)) {
5349                 IWL_ERROR("File size way too small!\n");
5350                 ret = -EINVAL;
5351                 goto err_release;
5352         }
5353
5354         /* Data from ucode file:  header followed by uCode images */
5355         ucode = (void *)ucode_raw->data;
5356
5357         priv->ucode_ver = le32_to_cpu(ucode->ver);
5358         api_ver = IWL_UCODE_API(priv->ucode_ver);
5359         inst_size = le32_to_cpu(ucode->inst_size);
5360         data_size = le32_to_cpu(ucode->data_size);
5361         init_size = le32_to_cpu(ucode->init_size);
5362         init_data_size = le32_to_cpu(ucode->init_data_size);
5363         boot_size = le32_to_cpu(ucode->boot_size);
5364
5365         /* api_ver should match the api version forming part of the
5366          * firmware filename ... but we don't check for that and only rely
5367          * on the API version read from firware header from here on forward */
5368
5369         if (api_ver < api_min || api_ver > api_max) {
5370                 IWL_ERROR("Driver unable to support your firmware API. "
5371                           "Driver supports v%u, firmware is v%u.\n",
5372                           api_max, api_ver);
5373                 priv->ucode_ver = 0;
5374                 ret = -EINVAL;
5375                 goto err_release;
5376         }
5377         if (api_ver != api_max)
5378                 IWL_ERROR("Firmware has old API version. Expected %u, "
5379                           "got %u. New firmware can be obtained "
5380                           "from http://www.intellinuxwireless.org.\n",
5381                           api_max, api_ver);
5382
5383         printk(KERN_INFO DRV_NAME " loaded firmware version %u.%u.%u.%u\n",
5384                        IWL_UCODE_MAJOR(priv->ucode_ver),
5385                        IWL_UCODE_MINOR(priv->ucode_ver),
5386                        IWL_UCODE_API(priv->ucode_ver),
5387                        IWL_UCODE_SERIAL(priv->ucode_ver));
5388         IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
5389                        priv->ucode_ver);
5390         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5391         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5392         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5393         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5394         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5395
5396
5397         /* Verify size of file vs. image size info in file's header */
5398         if (ucode_raw->size < sizeof(*ucode) +
5399                 inst_size + data_size + init_size +
5400                 init_data_size + boot_size) {
5401
5402                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5403                                (int)ucode_raw->size);
5404                 ret = -EINVAL;
5405                 goto err_release;
5406         }
5407
5408         /* Verify that uCode images will fit in card's SRAM */
5409         if (inst_size > IWL_MAX_INST_SIZE) {
5410                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5411                                inst_size);
5412                 ret = -EINVAL;
5413                 goto err_release;
5414         }
5415
5416         if (data_size > IWL_MAX_DATA_SIZE) {
5417                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5418                                data_size);
5419                 ret = -EINVAL;
5420                 goto err_release;
5421         }
5422         if (init_size > IWL_MAX_INST_SIZE) {
5423                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5424                                 init_size);
5425                 ret = -EINVAL;
5426                 goto err_release;
5427         }
5428         if (init_data_size > IWL_MAX_DATA_SIZE) {
5429                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5430                                 init_data_size);
5431                 ret = -EINVAL;
5432                 goto err_release;
5433         }
5434         if (boot_size > IWL_MAX_BSM_SIZE) {
5435                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5436                                 boot_size);
5437                 ret = -EINVAL;
5438                 goto err_release;
5439         }
5440
5441         /* Allocate ucode buffers for card's bus-master loading ... */
5442
5443         /* Runtime instructions and 2 copies of data:
5444          * 1) unmodified from disk
5445          * 2) backup cache for save/restore during power-downs */
5446         priv->ucode_code.len = inst_size;
5447         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5448
5449         priv->ucode_data.len = data_size;
5450         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5451
5452         priv->ucode_data_backup.len = data_size;
5453         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5454
5455         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5456             !priv->ucode_data_backup.v_addr)
5457                 goto err_pci_alloc;
5458
5459         /* Initialization instructions and data */
5460         if (init_size && init_data_size) {
5461                 priv->ucode_init.len = init_size;
5462                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5463
5464                 priv->ucode_init_data.len = init_data_size;
5465                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5466
5467                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5468                         goto err_pci_alloc;
5469         }
5470
5471         /* Bootstrap (instructions only, no data) */
5472         if (boot_size) {
5473                 priv->ucode_boot.len = boot_size;
5474                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5475
5476                 if (!priv->ucode_boot.v_addr)
5477                         goto err_pci_alloc;
5478         }
5479
5480         /* Copy images into buffers for card's bus-master reads ... */
5481
5482         /* Runtime instructions (first block of data in file) */
5483         src = &ucode->data[0];
5484         len = priv->ucode_code.len;
5485         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5486         memcpy(priv->ucode_code.v_addr, src, len);
5487         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5488                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5489
5490         /* Runtime data (2nd block)
5491          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5492         src = &ucode->data[inst_size];
5493         len = priv->ucode_data.len;
5494         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5495         memcpy(priv->ucode_data.v_addr, src, len);
5496         memcpy(priv->ucode_data_backup.v_addr, src, len);
5497
5498         /* Initialization instructions (3rd block) */
5499         if (init_size) {
5500                 src = &ucode->data[inst_size + data_size];
5501                 len = priv->ucode_init.len;
5502                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5503                                len);
5504                 memcpy(priv->ucode_init.v_addr, src, len);
5505         }
5506
5507         /* Initialization data (4th block) */
5508         if (init_data_size) {
5509                 src = &ucode->data[inst_size + data_size + init_size];
5510                 len = priv->ucode_init_data.len;
5511                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5512                                (int)len);
5513                 memcpy(priv->ucode_init_data.v_addr, src, len);
5514         }
5515
5516         /* Bootstrap instructions (5th block) */
5517         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5518         len = priv->ucode_boot.len;
5519         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5520                        (int)len);
5521         memcpy(priv->ucode_boot.v_addr, src, len);
5522
5523         /* We have our copies now, allow OS release its copies */
5524         release_firmware(ucode_raw);
5525         return 0;
5526
5527  err_pci_alloc:
5528         IWL_ERROR("failed to allocate pci memory\n");
5529         ret = -ENOMEM;
5530         iwl3945_dealloc_ucode_pci(priv);
5531
5532  err_release:
5533         release_firmware(ucode_raw);
5534
5535  error:
5536         return ret;
5537 }
5538
5539
5540 /**
5541  * iwl3945_set_ucode_ptrs - Set uCode address location
5542  *
5543  * Tell initialization uCode where to find runtime uCode.
5544  *
5545  * BSM registers initially contain pointers to initialization uCode.
5546  * We need to replace them to load runtime uCode inst and data,
5547  * and to save runtime data when powering down.
5548  */
5549 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5550 {
5551         dma_addr_t pinst;
5552         dma_addr_t pdata;
5553         int rc = 0;
5554         unsigned long flags;
5555
5556         /* bits 31:0 for 3945 */
5557         pinst = priv->ucode_code.p_addr;
5558         pdata = priv->ucode_data_backup.p_addr;
5559
5560         spin_lock_irqsave(&priv->lock, flags);
5561         rc = iwl3945_grab_nic_access(priv);
5562         if (rc) {
5563                 spin_unlock_irqrestore(&priv->lock, flags);
5564                 return rc;
5565         }
5566
5567         /* Tell bootstrap uCode where to find image to load */
5568         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5569         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5570         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5571                                  priv->ucode_data.len);
5572
5573         /* Inst byte count must be last to set up, bit 31 signals uCode
5574          *   that all new ptr/size info is in place */
5575         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5576                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5577
5578         iwl3945_release_nic_access(priv);
5579
5580         spin_unlock_irqrestore(&priv->lock, flags);
5581
5582         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5583
5584         return rc;
5585 }
5586
5587 /**
5588  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5589  *
5590  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5591  *
5592  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5593  */
5594 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5595 {
5596         /* Check alive response for "valid" sign from uCode */
5597         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5598                 /* We had an error bringing up the hardware, so take it
5599                  * all the way back down so we can try again */
5600                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5601                 goto restart;
5602         }
5603
5604         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5605          * This is a paranoid check, because we would not have gotten the
5606          * "initialize" alive if code weren't properly loaded.  */
5607         if (iwl3945_verify_ucode(priv)) {
5608                 /* Runtime instruction load was bad;
5609                  * take it all the way back down so we can try again */
5610                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5611                 goto restart;
5612         }
5613
5614         /* Send pointers to protocol/runtime uCode image ... init code will
5615          * load and launch runtime uCode, which will send us another "Alive"
5616          * notification. */
5617         IWL_DEBUG_INFO("Initialization Alive received.\n");
5618         if (iwl3945_set_ucode_ptrs(priv)) {
5619                 /* Runtime instruction load won't happen;
5620                  * take it all the way back down so we can try again */
5621                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5622                 goto restart;
5623         }
5624         return;
5625
5626  restart:
5627         queue_work(priv->workqueue, &priv->restart);
5628 }
5629
5630
5631 /* temporary */
5632 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw,
5633                                      struct sk_buff *skb);
5634
5635 /**
5636  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5637  *                   from protocol/runtime uCode (initialization uCode's
5638  *                   Alive gets handled by iwl3945_init_alive_start()).
5639  */
5640 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5641 {
5642         int rc = 0;
5643         int thermal_spin = 0;
5644         u32 rfkill;
5645
5646         IWL_DEBUG_INFO("Runtime Alive received.\n");
5647
5648         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5649                 /* We had an error bringing up the hardware, so take it
5650                  * all the way back down so we can try again */
5651                 IWL_DEBUG_INFO("Alive failed.\n");
5652                 goto restart;
5653         }
5654
5655         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5656          * This is a paranoid check, because we would not have gotten the
5657          * "runtime" alive if code weren't properly loaded.  */
5658         if (iwl3945_verify_ucode(priv)) {
5659                 /* Runtime instruction load was bad;
5660                  * take it all the way back down so we can try again */
5661                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5662                 goto restart;
5663         }
5664
5665         iwl3945_clear_stations_table(priv);
5666
5667         rc = iwl3945_grab_nic_access(priv);
5668         if (rc) {
5669                 IWL_WARNING("Can not read RFKILL status from adapter\n");
5670                 return;
5671         }
5672
5673         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5674         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5675         iwl3945_release_nic_access(priv);
5676
5677         if (rfkill & 0x1) {
5678                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5679                 /* if RFKILL is not on, then wait for thermal
5680                  * sensor in adapter to kick in */
5681                 while (iwl3945_hw_get_temperature(priv) == 0) {
5682                         thermal_spin++;
5683                         udelay(10);
5684                 }
5685
5686                 if (thermal_spin)
5687                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5688                                        thermal_spin * 10);
5689         } else
5690                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5691
5692         /* After the ALIVE response, we can send commands to 3945 uCode */
5693         set_bit(STATUS_ALIVE, &priv->status);
5694
5695         /* Clear out the uCode error bit if it is set */
5696         clear_bit(STATUS_FW_ERROR, &priv->status);
5697
5698         if (iwl3945_is_rfkill(priv))
5699                 return;
5700
5701         ieee80211_wake_queues(priv->hw);
5702
5703         priv->active_rate = priv->rates_mask;
5704         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5705
5706         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5707
5708         if (iwl3945_is_associated(priv)) {
5709                 struct iwl3945_rxon_cmd *active_rxon =
5710                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5711
5712                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5713                        sizeof(priv->staging_rxon));
5714                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5715         } else {
5716                 /* Initialize our rx_config data */
5717                 iwl3945_connection_init_rx_config(priv, priv->iw_mode);
5718                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5719         }
5720
5721         /* Configure Bluetooth device coexistence support */
5722         iwl3945_send_bt_config(priv);
5723
5724         /* Configure the adapter for unassociated operation */
5725         iwl3945_commit_rxon(priv);
5726
5727         iwl3945_reg_txpower_periodic(priv);
5728
5729         iwl3945_led_register(priv);
5730
5731         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5732         set_bit(STATUS_READY, &priv->status);
5733         wake_up_interruptible(&priv->wait_command_queue);
5734
5735         if (priv->error_recovering)
5736                 iwl3945_error_recovery(priv);
5737
5738         /* reassociate for ADHOC mode */
5739         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
5740                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
5741                                                                 priv->vif);
5742                 if (beacon)
5743                         iwl3945_mac_beacon_update(priv->hw, beacon);
5744         }
5745
5746         return;
5747
5748  restart:
5749         queue_work(priv->workqueue, &priv->restart);
5750 }
5751
5752 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5753
5754 static void __iwl3945_down(struct iwl3945_priv *priv)
5755 {
5756         unsigned long flags;
5757         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5758         struct ieee80211_conf *conf = NULL;
5759
5760         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5761
5762         conf = ieee80211_get_hw_conf(priv->hw);
5763
5764         if (!exit_pending)
5765                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5766
5767         iwl3945_led_unregister(priv);
5768         iwl3945_clear_stations_table(priv);
5769
5770         /* Unblock any waiting calls */
5771         wake_up_interruptible_all(&priv->wait_command_queue);
5772
5773         /* Wipe out the EXIT_PENDING status bit if we are not actually
5774          * exiting the module */
5775         if (!exit_pending)
5776                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5777
5778         /* stop and reset the on-board processor */
5779         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5780
5781         /* tell the device to stop sending interrupts */
5782         spin_lock_irqsave(&priv->lock, flags);
5783         iwl3945_disable_interrupts(priv);
5784         spin_unlock_irqrestore(&priv->lock, flags);
5785         iwl_synchronize_irq(priv);
5786
5787         if (priv->mac80211_registered)
5788                 ieee80211_stop_queues(priv->hw);
5789
5790         /* If we have not previously called iwl3945_init() then
5791          * clear all bits but the RF Kill and SUSPEND bits and return */
5792         if (!iwl3945_is_init(priv)) {
5793                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5794                                         STATUS_RF_KILL_HW |
5795                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5796                                         STATUS_RF_KILL_SW |
5797                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5798                                         STATUS_GEO_CONFIGURED |
5799                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5800                                         STATUS_IN_SUSPEND |
5801                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5802                                         STATUS_EXIT_PENDING;
5803                 goto exit;
5804         }
5805
5806         /* ...otherwise clear out all the status bits but the RF Kill and
5807          * SUSPEND bits and continue taking the NIC down. */
5808         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5809                                 STATUS_RF_KILL_HW |
5810                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5811                                 STATUS_RF_KILL_SW |
5812                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5813                                 STATUS_GEO_CONFIGURED |
5814                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5815                                 STATUS_IN_SUSPEND |
5816                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5817                                 STATUS_FW_ERROR |
5818                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5819                                 STATUS_EXIT_PENDING;
5820
5821         spin_lock_irqsave(&priv->lock, flags);
5822         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5823         spin_unlock_irqrestore(&priv->lock, flags);
5824
5825         iwl3945_hw_txq_ctx_stop(priv);
5826         iwl3945_hw_rxq_stop(priv);
5827
5828         spin_lock_irqsave(&priv->lock, flags);
5829         if (!iwl3945_grab_nic_access(priv)) {
5830                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5831                                          APMG_CLK_VAL_DMA_CLK_RQT);
5832                 iwl3945_release_nic_access(priv);
5833         }
5834         spin_unlock_irqrestore(&priv->lock, flags);
5835
5836         udelay(5);
5837
5838         iwl3945_hw_nic_stop_master(priv);
5839         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5840         iwl3945_hw_nic_reset(priv);
5841
5842  exit:
5843         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5844
5845         if (priv->ibss_beacon)
5846                 dev_kfree_skb(priv->ibss_beacon);
5847         priv->ibss_beacon = NULL;
5848
5849         /* clear out any free frames */
5850         iwl3945_clear_free_frames(priv);
5851 }
5852
5853 static void iwl3945_down(struct iwl3945_priv *priv)
5854 {
5855         mutex_lock(&priv->mutex);
5856         __iwl3945_down(priv);
5857         mutex_unlock(&priv->mutex);
5858
5859         iwl3945_cancel_deferred_work(priv);
5860 }
5861
5862 #define MAX_HW_RESTARTS 5
5863
5864 static int __iwl3945_up(struct iwl3945_priv *priv)
5865 {
5866         int rc, i;
5867
5868         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5869                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5870                 return -EIO;
5871         }
5872
5873         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5874                 IWL_WARNING("Radio disabled by SW RF kill (module "
5875                             "parameter)\n");
5876                 return -ENODEV;
5877         }
5878
5879         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5880                 IWL_ERROR("ucode not available for device bring up\n");
5881                 return -EIO;
5882         }
5883
5884         /* If platform's RF_KILL switch is NOT set to KILL */
5885         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
5886                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5887                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5888         else {
5889                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5890                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5891                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5892                         return -ENODEV;
5893                 }
5894         }
5895
5896         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5897
5898         rc = iwl3945_hw_nic_init(priv);
5899         if (rc) {
5900                 IWL_ERROR("Unable to int nic\n");
5901                 return rc;
5902         }
5903
5904         /* make sure rfkill handshake bits are cleared */
5905         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5906         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5907                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5908
5909         /* clear (again), then enable host interrupts */
5910         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5911         iwl3945_enable_interrupts(priv);
5912
5913         /* really make sure rfkill handshake bits are cleared */
5914         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5915         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5916
5917         /* Copy original ucode data image from disk into backup cache.
5918          * This will be used to initialize the on-board processor's
5919          * data SRAM for a clean start when the runtime program first loads. */
5920         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5921                priv->ucode_data.len);
5922
5923         /* We return success when we resume from suspend and rf_kill is on. */
5924         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5925                 return 0;
5926
5927         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5928
5929                 iwl3945_clear_stations_table(priv);
5930
5931                 /* load bootstrap state machine,
5932                  * load bootstrap program into processor's memory,
5933                  * prepare to load the "initialize" uCode */
5934                 rc = iwl3945_load_bsm(priv);
5935
5936                 if (rc) {
5937                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
5938                         continue;
5939                 }
5940
5941                 /* start card; "initialize" will load runtime ucode */
5942                 iwl3945_nic_start(priv);
5943
5944                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5945
5946                 return 0;
5947         }
5948
5949         set_bit(STATUS_EXIT_PENDING, &priv->status);
5950         __iwl3945_down(priv);
5951         clear_bit(STATUS_EXIT_PENDING, &priv->status);
5952
5953         /* tried to restart and config the device for as long as our
5954          * patience could withstand */
5955         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5956         return -EIO;
5957 }
5958
5959
5960 /*****************************************************************************
5961  *
5962  * Workqueue callbacks
5963  *
5964  *****************************************************************************/
5965
5966 static void iwl3945_bg_init_alive_start(struct work_struct *data)
5967 {
5968         struct iwl3945_priv *priv =
5969             container_of(data, struct iwl3945_priv, init_alive_start.work);
5970
5971         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5972                 return;
5973
5974         mutex_lock(&priv->mutex);
5975         iwl3945_init_alive_start(priv);
5976         mutex_unlock(&priv->mutex);
5977 }
5978
5979 static void iwl3945_bg_alive_start(struct work_struct *data)
5980 {
5981         struct iwl3945_priv *priv =
5982             container_of(data, struct iwl3945_priv, alive_start.work);
5983
5984         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5985                 return;
5986
5987         mutex_lock(&priv->mutex);
5988         iwl3945_alive_start(priv);
5989         mutex_unlock(&priv->mutex);
5990 }
5991
5992 static void iwl3945_bg_rf_kill(struct work_struct *work)
5993 {
5994         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
5995
5996         wake_up_interruptible(&priv->wait_command_queue);
5997
5998         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5999                 return;
6000
6001         mutex_lock(&priv->mutex);
6002
6003         if (!iwl3945_is_rfkill(priv)) {
6004                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6005                           "HW and/or SW RF Kill no longer active, restarting "
6006                           "device\n");
6007                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6008                         queue_work(priv->workqueue, &priv->restart);
6009         } else {
6010
6011                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6012                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6013                                           "disabled by SW switch\n");
6014                 else
6015                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6016                                     "Kill switch must be turned off for "
6017                                     "wireless networking to work.\n");
6018         }
6019
6020         mutex_unlock(&priv->mutex);
6021         iwl3945_rfkill_set_hw_state(priv);
6022 }
6023
6024 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6025
6026 static void iwl3945_bg_scan_check(struct work_struct *data)
6027 {
6028         struct iwl3945_priv *priv =
6029             container_of(data, struct iwl3945_priv, scan_check.work);
6030
6031         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6032                 return;
6033
6034         mutex_lock(&priv->mutex);
6035         if (test_bit(STATUS_SCANNING, &priv->status) ||
6036             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6037                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6038                           "Scan completion watchdog resetting adapter (%dms)\n",
6039                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6040
6041                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6042                         iwl3945_send_scan_abort(priv);
6043         }
6044         mutex_unlock(&priv->mutex);
6045 }
6046
6047 static void iwl3945_bg_request_scan(struct work_struct *data)
6048 {
6049         struct iwl3945_priv *priv =
6050             container_of(data, struct iwl3945_priv, request_scan);
6051         struct iwl3945_host_cmd cmd = {
6052                 .id = REPLY_SCAN_CMD,
6053                 .len = sizeof(struct iwl3945_scan_cmd),
6054                 .meta.flags = CMD_SIZE_HUGE,
6055         };
6056         int rc = 0;
6057         struct iwl3945_scan_cmd *scan;
6058         struct ieee80211_conf *conf = NULL;
6059         u8 n_probes = 2;
6060         enum ieee80211_band band;
6061         DECLARE_SSID_BUF(ssid);
6062
6063         conf = ieee80211_get_hw_conf(priv->hw);
6064
6065         mutex_lock(&priv->mutex);
6066
6067         if (!iwl3945_is_ready(priv)) {
6068                 IWL_WARNING("request scan called when driver not ready.\n");
6069                 goto done;
6070         }
6071
6072         /* Make sure the scan wasn't canceled before this queued work
6073          * was given the chance to run... */
6074         if (!test_bit(STATUS_SCANNING, &priv->status))
6075                 goto done;
6076
6077         /* This should never be called or scheduled if there is currently
6078          * a scan active in the hardware. */
6079         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6080                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6081                                "Ignoring second request.\n");
6082                 rc = -EIO;
6083                 goto done;
6084         }
6085
6086         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6087                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6088                 goto done;
6089         }
6090
6091         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6092                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6093                 goto done;
6094         }
6095
6096         if (iwl3945_is_rfkill(priv)) {
6097                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6098                 goto done;
6099         }
6100
6101         if (!test_bit(STATUS_READY, &priv->status)) {
6102                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6103                 goto done;
6104         }
6105
6106         if (!priv->scan_bands) {
6107                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6108                 goto done;
6109         }
6110
6111         if (!priv->scan) {
6112                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6113                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6114                 if (!priv->scan) {
6115                         rc = -ENOMEM;
6116                         goto done;
6117                 }
6118         }
6119         scan = priv->scan;
6120         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6121
6122         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6123         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6124
6125         if (iwl3945_is_associated(priv)) {
6126                 u16 interval = 0;
6127                 u32 extra;
6128                 u32 suspend_time = 100;
6129                 u32 scan_suspend_time = 100;
6130                 unsigned long flags;
6131
6132                 IWL_DEBUG_INFO("Scanning while associated...\n");
6133
6134                 spin_lock_irqsave(&priv->lock, flags);
6135                 interval = priv->beacon_int;
6136                 spin_unlock_irqrestore(&priv->lock, flags);
6137
6138                 scan->suspend_time = 0;
6139                 scan->max_out_time = cpu_to_le32(200 * 1024);
6140                 if (!interval)
6141                         interval = suspend_time;
6142                 /*
6143                  * suspend time format:
6144                  *  0-19: beacon interval in usec (time before exec.)
6145                  * 20-23: 0
6146                  * 24-31: number of beacons (suspend between channels)
6147                  */
6148
6149                 extra = (suspend_time / interval) << 24;
6150                 scan_suspend_time = 0xFF0FFFFF &
6151                     (extra | ((suspend_time % interval) * 1024));
6152
6153                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6154                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6155                                scan_suspend_time, interval);
6156         }
6157
6158         /* We should add the ability for user to lock to PASSIVE ONLY */
6159         if (priv->one_direct_scan) {
6160                 IWL_DEBUG_SCAN
6161                     ("Kicking off one direct scan for '%s'\n",
6162                      print_ssid(ssid, priv->direct_ssid,
6163                                 priv->direct_ssid_len));
6164                 scan->direct_scan[0].id = WLAN_EID_SSID;
6165                 scan->direct_scan[0].len = priv->direct_ssid_len;
6166                 memcpy(scan->direct_scan[0].ssid,
6167                        priv->direct_ssid, priv->direct_ssid_len);
6168                 n_probes++;
6169         } else
6170                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6171
6172         /* We don't build a direct scan probe request; the uCode will do
6173          * that based on the direct_mask added to each channel entry */
6174         scan->tx_cmd.len = cpu_to_le16(
6175                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6176                         IWL_MAX_SCAN_SIZE - sizeof(*scan)));
6177         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6178         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6179         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6180
6181         /* flags + rate selection */
6182
6183         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
6184                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6185                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6186                 scan->good_CRC_th = 0;
6187                 band = IEEE80211_BAND_2GHZ;
6188         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
6189                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6190                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6191                 band = IEEE80211_BAND_5GHZ;
6192         } else {
6193                 IWL_WARNING("Invalid scan band count\n");
6194                 goto done;
6195         }
6196
6197         /* select Rx antennas */
6198         scan->flags |= iwl3945_get_antenna_flags(priv);
6199
6200         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
6201                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6202
6203         scan->channel_count =
6204                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
6205                                               n_probes,
6206                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6207
6208         if (scan->channel_count == 0) {
6209                 IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
6210                 goto done;
6211         }
6212
6213         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6214             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6215         cmd.data = scan;
6216         scan->len = cpu_to_le16(cmd.len);
6217
6218         set_bit(STATUS_SCAN_HW, &priv->status);
6219         rc = iwl3945_send_cmd_sync(priv, &cmd);
6220         if (rc)
6221                 goto done;
6222
6223         queue_delayed_work(priv->workqueue, &priv->scan_check,
6224                            IWL_SCAN_CHECK_WATCHDOG);
6225
6226         mutex_unlock(&priv->mutex);
6227         return;
6228
6229  done:
6230         /* can not perform scan make sure we clear scanning
6231          * bits from status so next scan request can be performed.
6232          * if we dont clear scanning status bit here all next scan
6233          * will fail
6234         */
6235         clear_bit(STATUS_SCAN_HW, &priv->status);
6236         clear_bit(STATUS_SCANNING, &priv->status);
6237
6238         /* inform mac80211 scan aborted */
6239         queue_work(priv->workqueue, &priv->scan_completed);
6240         mutex_unlock(&priv->mutex);
6241 }
6242
6243 static void iwl3945_bg_up(struct work_struct *data)
6244 {
6245         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6246
6247         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6248                 return;
6249
6250         mutex_lock(&priv->mutex);
6251         __iwl3945_up(priv);
6252         mutex_unlock(&priv->mutex);
6253         iwl3945_rfkill_set_hw_state(priv);
6254 }
6255
6256 static void iwl3945_bg_restart(struct work_struct *data)
6257 {
6258         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6259
6260         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6261                 return;
6262
6263         iwl3945_down(priv);
6264         queue_work(priv->workqueue, &priv->up);
6265 }
6266
6267 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6268 {
6269         struct iwl3945_priv *priv =
6270             container_of(data, struct iwl3945_priv, rx_replenish);
6271
6272         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6273                 return;
6274
6275         mutex_lock(&priv->mutex);
6276         iwl3945_rx_replenish(priv);
6277         mutex_unlock(&priv->mutex);
6278 }
6279
6280 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6281
6282 static void iwl3945_post_associate(struct iwl3945_priv *priv)
6283 {
6284         int rc = 0;
6285         struct ieee80211_conf *conf = NULL;
6286
6287         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6288                 IWL_ERROR("%s Should not be called in AP mode\n", __func__);
6289                 return;
6290         }
6291
6292
6293         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
6294                         priv->assoc_id, priv->active_rxon.bssid_addr);
6295
6296         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6297                 return;
6298
6299         if (!priv->vif || !priv->is_open)
6300                 return;
6301
6302         iwl3945_scan_cancel_timeout(priv, 200);
6303
6304         conf = ieee80211_get_hw_conf(priv->hw);
6305
6306         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6307         iwl3945_commit_rxon(priv);
6308
6309         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6310         iwl3945_setup_rxon_timing(priv);
6311         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6312                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6313         if (rc)
6314                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6315                             "Attempting to continue.\n");
6316
6317         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6318
6319         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6320
6321         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6322                         priv->assoc_id, priv->beacon_int);
6323
6324         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6325                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6326         else
6327                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6328
6329         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6330                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6331                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6332                 else
6333                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6334
6335                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6336                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6337
6338         }
6339
6340         iwl3945_commit_rxon(priv);
6341
6342         switch (priv->iw_mode) {
6343         case NL80211_IFTYPE_STATION:
6344                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6345                 break;
6346
6347         case NL80211_IFTYPE_ADHOC:
6348
6349                 priv->assoc_id = 1;
6350                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6351                 iwl3945_sync_sta(priv, IWL_STA_ID,
6352                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6353                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6354                                  CMD_ASYNC);
6355                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6356                 iwl3945_send_beacon_cmd(priv);
6357
6358                 break;
6359
6360         default:
6361                  IWL_ERROR("%s Should not be called in %d mode\n",
6362                            __func__, priv->iw_mode);
6363                 break;
6364         }
6365
6366         iwl3945_activate_qos(priv, 0);
6367
6368         /* we have just associated, don't start scan too early */
6369         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6370 }
6371
6372 static void iwl3945_bg_abort_scan(struct work_struct *work)
6373 {
6374         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6375
6376         if (!iwl3945_is_ready(priv))
6377                 return;
6378
6379         mutex_lock(&priv->mutex);
6380
6381         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6382         iwl3945_send_scan_abort(priv);
6383
6384         mutex_unlock(&priv->mutex);
6385 }
6386
6387 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed);
6388
6389 static void iwl3945_bg_scan_completed(struct work_struct *work)
6390 {
6391         struct iwl3945_priv *priv =
6392             container_of(work, struct iwl3945_priv, scan_completed);
6393
6394         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6395
6396         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6397                 return;
6398
6399         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6400                 iwl3945_mac_config(priv->hw, 0);
6401
6402         ieee80211_scan_completed(priv->hw);
6403
6404         /* Since setting the TXPOWER may have been deferred while
6405          * performing the scan, fire one off */
6406         mutex_lock(&priv->mutex);
6407         iwl3945_hw_reg_send_txpower(priv);
6408         mutex_unlock(&priv->mutex);
6409 }
6410
6411 /*****************************************************************************
6412  *
6413  * mac80211 entry point functions
6414  *
6415  *****************************************************************************/
6416
6417 #define UCODE_READY_TIMEOUT     (2 * HZ)
6418
6419 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6420 {
6421         struct iwl3945_priv *priv = hw->priv;
6422         int ret;
6423
6424         IWL_DEBUG_MAC80211("enter\n");
6425
6426         if (pci_enable_device(priv->pci_dev)) {
6427                 IWL_ERROR("Fail to pci_enable_device\n");
6428                 return -ENODEV;
6429         }
6430         pci_restore_state(priv->pci_dev);
6431         pci_enable_msi(priv->pci_dev);
6432
6433         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6434                           DRV_NAME, priv);
6435         if (ret) {
6436                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6437                 goto out_disable_msi;
6438         }
6439
6440         /* we should be verifying the device is ready to be opened */
6441         mutex_lock(&priv->mutex);
6442
6443         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6444         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6445          * ucode filename and max sizes are card-specific. */
6446
6447         if (!priv->ucode_code.len) {
6448                 ret = iwl3945_read_ucode(priv);
6449                 if (ret) {
6450                         IWL_ERROR("Could not read microcode: %d\n", ret);
6451                         mutex_unlock(&priv->mutex);
6452                         goto out_release_irq;
6453                 }
6454         }
6455
6456         ret = __iwl3945_up(priv);
6457
6458         mutex_unlock(&priv->mutex);
6459
6460         iwl3945_rfkill_set_hw_state(priv);
6461
6462         if (ret)
6463                 goto out_release_irq;
6464
6465         IWL_DEBUG_INFO("Start UP work.\n");
6466
6467         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6468                 return 0;
6469
6470         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6471          * mac80211 will not be run successfully. */
6472         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6473                         test_bit(STATUS_READY, &priv->status),
6474                         UCODE_READY_TIMEOUT);
6475         if (!ret) {
6476                 if (!test_bit(STATUS_READY, &priv->status)) {
6477                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6478                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6479                         ret = -ETIMEDOUT;
6480                         goto out_release_irq;
6481                 }
6482         }
6483
6484         priv->is_open = 1;
6485         IWL_DEBUG_MAC80211("leave\n");
6486         return 0;
6487
6488 out_release_irq:
6489         free_irq(priv->pci_dev->irq, priv);
6490 out_disable_msi:
6491         pci_disable_msi(priv->pci_dev);
6492         pci_disable_device(priv->pci_dev);
6493         priv->is_open = 0;
6494         IWL_DEBUG_MAC80211("leave - failed\n");
6495         return ret;
6496 }
6497
6498 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6499 {
6500         struct iwl3945_priv *priv = hw->priv;
6501
6502         IWL_DEBUG_MAC80211("enter\n");
6503
6504         if (!priv->is_open) {
6505                 IWL_DEBUG_MAC80211("leave - skip\n");
6506                 return;
6507         }
6508
6509         priv->is_open = 0;
6510
6511         if (iwl3945_is_ready_rf(priv)) {
6512                 /* stop mac, cancel any scan request and clear
6513                  * RXON_FILTER_ASSOC_MSK BIT
6514                  */
6515                 mutex_lock(&priv->mutex);
6516                 iwl3945_scan_cancel_timeout(priv, 100);
6517                 mutex_unlock(&priv->mutex);
6518         }
6519
6520         iwl3945_down(priv);
6521
6522         flush_workqueue(priv->workqueue);
6523         free_irq(priv->pci_dev->irq, priv);
6524         pci_disable_msi(priv->pci_dev);
6525         pci_save_state(priv->pci_dev);
6526         pci_disable_device(priv->pci_dev);
6527
6528         IWL_DEBUG_MAC80211("leave\n");
6529 }
6530
6531 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
6532 {
6533         struct iwl3945_priv *priv = hw->priv;
6534
6535         IWL_DEBUG_MAC80211("enter\n");
6536
6537         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6538                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
6539
6540         if (iwl3945_tx_skb(priv, skb))
6541                 dev_kfree_skb_any(skb);
6542
6543         IWL_DEBUG_MAC80211("leave\n");
6544         return NETDEV_TX_OK;
6545 }
6546
6547 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6548                                  struct ieee80211_if_init_conf *conf)
6549 {
6550         struct iwl3945_priv *priv = hw->priv;
6551         unsigned long flags;
6552
6553         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6554
6555         if (priv->vif) {
6556                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6557                 return -EOPNOTSUPP;
6558         }
6559
6560         spin_lock_irqsave(&priv->lock, flags);
6561         priv->vif = conf->vif;
6562         priv->iw_mode = conf->type;
6563
6564         spin_unlock_irqrestore(&priv->lock, flags);
6565
6566         mutex_lock(&priv->mutex);
6567
6568         if (conf->mac_addr) {
6569                 IWL_DEBUG_MAC80211("Set: %pM\n", conf->mac_addr);
6570                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6571         }
6572
6573         if (iwl3945_is_ready(priv))
6574                 iwl3945_set_mode(priv, conf->type);
6575
6576         mutex_unlock(&priv->mutex);
6577
6578         IWL_DEBUG_MAC80211("leave\n");
6579         return 0;
6580 }
6581
6582 /**
6583  * iwl3945_mac_config - mac80211 config callback
6584  *
6585  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6586  * be set inappropriately and the driver currently sets the hardware up to
6587  * use it whenever needed.
6588  */
6589 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
6590 {
6591         struct iwl3945_priv *priv = hw->priv;
6592         const struct iwl3945_channel_info *ch_info;
6593         struct ieee80211_conf *conf = &hw->conf;
6594         unsigned long flags;
6595         int ret = 0;
6596
6597         mutex_lock(&priv->mutex);
6598         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6599
6600         if (!iwl3945_is_ready(priv)) {
6601                 IWL_DEBUG_MAC80211("leave - not ready\n");
6602                 ret = -EIO;
6603                 goto out;
6604         }
6605
6606         if (unlikely(!iwl3945_param_disable_hw_scan &&
6607                      test_bit(STATUS_SCANNING, &priv->status))) {
6608                 IWL_DEBUG_MAC80211("leave - scanning\n");
6609                 set_bit(STATUS_CONF_PENDING, &priv->status);
6610                 mutex_unlock(&priv->mutex);
6611                 return 0;
6612         }
6613
6614         spin_lock_irqsave(&priv->lock, flags);
6615
6616         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6617                                            conf->channel->hw_value);
6618         if (!is_channel_valid(ch_info)) {
6619                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
6620                                conf->channel->hw_value, conf->channel->band);
6621                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6622                 spin_unlock_irqrestore(&priv->lock, flags);
6623                 ret = -EINVAL;
6624                 goto out;
6625         }
6626
6627         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6628
6629         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6630
6631         /* The list of supported rates and rate mask can be different
6632          * for each phymode; since the phymode may have changed, reset
6633          * the rate mask to what mac80211 lists */
6634         iwl3945_set_rate(priv);
6635
6636         spin_unlock_irqrestore(&priv->lock, flags);
6637
6638 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6639         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6640                 iwl3945_hw_channel_switch(priv, conf->channel);
6641                 goto out;
6642         }
6643 #endif
6644
6645         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6646
6647         if (!conf->radio_enabled) {
6648                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6649                 goto out;
6650         }
6651
6652         if (iwl3945_is_rfkill(priv)) {
6653                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6654                 ret = -EIO;
6655                 goto out;
6656         }
6657
6658         iwl3945_set_rate(priv);
6659
6660         if (memcmp(&priv->active_rxon,
6661                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6662                 iwl3945_commit_rxon(priv);
6663         else
6664                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6665
6666         IWL_DEBUG_MAC80211("leave\n");
6667
6668 out:
6669         clear_bit(STATUS_CONF_PENDING, &priv->status);
6670         mutex_unlock(&priv->mutex);
6671         return ret;
6672 }
6673
6674 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6675 {
6676         int rc = 0;
6677
6678         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6679                 return;
6680
6681         /* The following should be done only at AP bring up */
6682         if (!(iwl3945_is_associated(priv))) {
6683
6684                 /* RXON - unassoc (to set timing command) */
6685                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6686                 iwl3945_commit_rxon(priv);
6687
6688                 /* RXON Timing */
6689                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6690                 iwl3945_setup_rxon_timing(priv);
6691                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6692                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6693                 if (rc)
6694                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6695                                         "Attempting to continue.\n");
6696
6697                 /* FIXME: what should be the assoc_id for AP? */
6698                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6699                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6700                         priv->staging_rxon.flags |=
6701                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6702                 else
6703                         priv->staging_rxon.flags &=
6704                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6705
6706                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6707                         if (priv->assoc_capability &
6708                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6709                                 priv->staging_rxon.flags |=
6710                                         RXON_FLG_SHORT_SLOT_MSK;
6711                         else
6712                                 priv->staging_rxon.flags &=
6713                                         ~RXON_FLG_SHORT_SLOT_MSK;
6714
6715                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6716                                 priv->staging_rxon.flags &=
6717                                         ~RXON_FLG_SHORT_SLOT_MSK;
6718                 }
6719                 /* restore RXON assoc */
6720                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6721                 iwl3945_commit_rxon(priv);
6722                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6723         }
6724         iwl3945_send_beacon_cmd(priv);
6725
6726         /* FIXME - we need to add code here to detect a totally new
6727          * configuration, reset the AP, unassoc, rxon timing, assoc,
6728          * clear sta table, add BCAST sta... */
6729 }
6730
6731 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6732                                         struct ieee80211_vif *vif,
6733                                     struct ieee80211_if_conf *conf)
6734 {
6735         struct iwl3945_priv *priv = hw->priv;
6736         int rc;
6737
6738         if (conf == NULL)
6739                 return -EIO;
6740
6741         if (priv->vif != vif) {
6742                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6743                 return 0;
6744         }
6745
6746         /* handle this temporarily here */
6747         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
6748             conf->changed & IEEE80211_IFCC_BEACON) {
6749                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
6750                 if (!beacon)
6751                         return -ENOMEM;
6752                 mutex_lock(&priv->mutex);
6753                 rc = iwl3945_mac_beacon_update(hw, beacon);
6754                 mutex_unlock(&priv->mutex);
6755                 if (rc)
6756                         return rc;
6757         }
6758
6759         if (!iwl3945_is_alive(priv))
6760                 return -EAGAIN;
6761
6762         mutex_lock(&priv->mutex);
6763
6764         if (conf->bssid)
6765                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
6766
6767 /*
6768  * very dubious code was here; the probe filtering flag is never set:
6769  *
6770         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6771             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6772  */
6773
6774         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6775                 if (!conf->bssid) {
6776                         conf->bssid = priv->mac_addr;
6777                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6778                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
6779                                            conf->bssid);
6780                 }
6781                 if (priv->ibss_beacon)
6782                         dev_kfree_skb(priv->ibss_beacon);
6783
6784                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
6785         }
6786
6787         if (iwl3945_is_rfkill(priv))
6788                 goto done;
6789
6790         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6791             !is_multicast_ether_addr(conf->bssid)) {
6792                 /* If there is currently a HW scan going on in the background
6793                  * then we need to cancel it else the RXON below will fail. */
6794                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6795                         IWL_WARNING("Aborted scan still in progress "
6796                                     "after 100ms\n");
6797                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6798                         mutex_unlock(&priv->mutex);
6799                         return -EAGAIN;
6800                 }
6801                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6802
6803                 /* TODO: Audit driver for usage of these members and see
6804                  * if mac80211 deprecates them (priv->bssid looks like it
6805                  * shouldn't be there, but I haven't scanned the IBSS code
6806                  * to verify) - jpk */
6807                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6808
6809                 if (priv->iw_mode == NL80211_IFTYPE_AP)
6810                         iwl3945_config_ap(priv);
6811                 else {
6812                         rc = iwl3945_commit_rxon(priv);
6813                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
6814                                 iwl3945_add_station(priv,
6815                                         priv->active_rxon.bssid_addr, 1, 0);
6816                 }
6817
6818         } else {
6819                 iwl3945_scan_cancel_timeout(priv, 100);
6820                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6821                 iwl3945_commit_rxon(priv);
6822         }
6823
6824  done:
6825         IWL_DEBUG_MAC80211("leave\n");
6826         mutex_unlock(&priv->mutex);
6827
6828         return 0;
6829 }
6830
6831 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6832                                  unsigned int changed_flags,
6833                                  unsigned int *total_flags,
6834                                  int mc_count, struct dev_addr_list *mc_list)
6835 {
6836         struct iwl3945_priv *priv = hw->priv;
6837         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
6838
6839         IWL_DEBUG_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
6840                         changed_flags, *total_flags);
6841
6842         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
6843                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
6844                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
6845                 else
6846                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
6847         }
6848         if (changed_flags & FIF_ALLMULTI) {
6849                 if (*total_flags & FIF_ALLMULTI)
6850                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
6851                 else
6852                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
6853         }
6854         if (changed_flags & FIF_CONTROL) {
6855                 if (*total_flags & FIF_CONTROL)
6856                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
6857                 else
6858                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
6859         }
6860         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
6861                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
6862                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
6863                 else
6864                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
6865         }
6866
6867         /* We avoid iwl_commit_rxon here to commit the new filter flags
6868          * since mac80211 will call ieee80211_hw_config immediately.
6869          * (mc_list is not supported at this time). Otherwise, we need to
6870          * queue a background iwl_commit_rxon work.
6871          */
6872
6873         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
6874                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6875 }
6876
6877 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
6878                                      struct ieee80211_if_init_conf *conf)
6879 {
6880         struct iwl3945_priv *priv = hw->priv;
6881
6882         IWL_DEBUG_MAC80211("enter\n");
6883
6884         mutex_lock(&priv->mutex);
6885
6886         if (iwl3945_is_ready_rf(priv)) {
6887                 iwl3945_scan_cancel_timeout(priv, 100);
6888                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6889                 iwl3945_commit_rxon(priv);
6890         }
6891         if (priv->vif == conf->vif) {
6892                 priv->vif = NULL;
6893                 memset(priv->bssid, 0, ETH_ALEN);
6894         }
6895         mutex_unlock(&priv->mutex);
6896
6897         IWL_DEBUG_MAC80211("leave\n");
6898 }
6899
6900 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6901
6902 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
6903                                      struct ieee80211_vif *vif,
6904                                      struct ieee80211_bss_conf *bss_conf,
6905                                      u32 changes)
6906 {
6907         struct iwl3945_priv *priv = hw->priv;
6908
6909         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6910
6911         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6912                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6913                                    bss_conf->use_short_preamble);
6914                 if (bss_conf->use_short_preamble)
6915                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6916                 else
6917                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6918         }
6919
6920         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6921                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6922                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6923                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6924                 else
6925                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6926         }
6927
6928         if (changes & BSS_CHANGED_ASSOC) {
6929                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6930                 /* This should never happen as this function should
6931                  * never be called from interrupt context. */
6932                 if (WARN_ON_ONCE(in_interrupt()))
6933                         return;
6934                 if (bss_conf->assoc) {
6935                         priv->assoc_id = bss_conf->aid;
6936                         priv->beacon_int = bss_conf->beacon_int;
6937                         priv->timestamp0 = bss_conf->timestamp & 0xFFFFFFFF;
6938                         priv->timestamp1 = (bss_conf->timestamp >> 32) &
6939                                              0xFFFFFFFF;
6940                         priv->assoc_capability = bss_conf->assoc_capability;
6941                         priv->next_scan_jiffies = jiffies +
6942                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6943                         mutex_lock(&priv->mutex);
6944                         iwl3945_post_associate(priv);
6945                         mutex_unlock(&priv->mutex);
6946                 } else {
6947                         priv->assoc_id = 0;
6948                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6949                 }
6950         } else if (changes && iwl3945_is_associated(priv) && priv->assoc_id) {
6951                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6952                         iwl3945_send_rxon_assoc(priv);
6953         }
6954
6955 }
6956
6957 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6958 {
6959         int rc = 0;
6960         unsigned long flags;
6961         struct iwl3945_priv *priv = hw->priv;
6962         DECLARE_SSID_BUF(ssid_buf);
6963
6964         IWL_DEBUG_MAC80211("enter\n");
6965
6966         mutex_lock(&priv->mutex);
6967         spin_lock_irqsave(&priv->lock, flags);
6968
6969         if (!iwl3945_is_ready_rf(priv)) {
6970                 rc = -EIO;
6971                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6972                 goto out_unlock;
6973         }
6974
6975         /* we don't schedule scan within next_scan_jiffies period */
6976         if (priv->next_scan_jiffies &&
6977                         time_after(priv->next_scan_jiffies, jiffies)) {
6978                 rc = -EAGAIN;
6979                 goto out_unlock;
6980         }
6981         /* if we just finished scan ask for delay for a broadcast scan */
6982         if ((len == 0) && priv->last_scan_jiffies &&
6983             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
6984                        jiffies)) {
6985                 rc = -EAGAIN;
6986                 goto out_unlock;
6987         }
6988         if (len) {
6989                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6990                                print_ssid(ssid_buf, ssid, len), (int)len);
6991
6992                 priv->one_direct_scan = 1;
6993                 priv->direct_ssid_len = (u8)
6994                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6995                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6996         } else
6997                 priv->one_direct_scan = 0;
6998
6999         rc = iwl3945_scan_initiate(priv);
7000
7001         IWL_DEBUG_MAC80211("leave\n");
7002
7003 out_unlock:
7004         spin_unlock_irqrestore(&priv->lock, flags);
7005         mutex_unlock(&priv->mutex);
7006
7007         return rc;
7008 }
7009
7010 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7011                            const u8 *local_addr, const u8 *addr,
7012                            struct ieee80211_key_conf *key)
7013 {
7014         struct iwl3945_priv *priv = hw->priv;
7015         int rc = 0;
7016         u8 sta_id;
7017
7018         IWL_DEBUG_MAC80211("enter\n");
7019
7020         if (!iwl3945_param_hwcrypto) {
7021                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7022                 return -EOPNOTSUPP;
7023         }
7024
7025         if (is_zero_ether_addr(addr))
7026                 /* only support pairwise keys */
7027                 return -EOPNOTSUPP;
7028
7029         sta_id = iwl3945_hw_find_station(priv, addr);
7030         if (sta_id == IWL_INVALID_STATION) {
7031                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
7032                                    addr);
7033                 return -EINVAL;
7034         }
7035
7036         mutex_lock(&priv->mutex);
7037
7038         iwl3945_scan_cancel_timeout(priv, 100);
7039
7040         switch (cmd) {
7041         case  SET_KEY:
7042                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7043                 if (!rc) {
7044                         iwl3945_set_rxon_hwcrypto(priv, 1);
7045                         iwl3945_commit_rxon(priv);
7046                         key->hw_key_idx = sta_id;
7047                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7048                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7049                 }
7050                 break;
7051         case DISABLE_KEY:
7052                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7053                 if (!rc) {
7054                         iwl3945_set_rxon_hwcrypto(priv, 0);
7055                         iwl3945_commit_rxon(priv);
7056                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7057                 }
7058                 break;
7059         default:
7060                 rc = -EINVAL;
7061         }
7062
7063         IWL_DEBUG_MAC80211("leave\n");
7064         mutex_unlock(&priv->mutex);
7065
7066         return rc;
7067 }
7068
7069 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
7070                            const struct ieee80211_tx_queue_params *params)
7071 {
7072         struct iwl3945_priv *priv = hw->priv;
7073         unsigned long flags;
7074         int q;
7075
7076         IWL_DEBUG_MAC80211("enter\n");
7077
7078         if (!iwl3945_is_ready_rf(priv)) {
7079                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7080                 return -EIO;
7081         }
7082
7083         if (queue >= AC_NUM) {
7084                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7085                 return 0;
7086         }
7087
7088         q = AC_NUM - 1 - queue;
7089
7090         spin_lock_irqsave(&priv->lock, flags);
7091
7092         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7093         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7094         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7095         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7096                         cpu_to_le16((params->txop * 32));
7097
7098         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7099         priv->qos_data.qos_active = 1;
7100
7101         spin_unlock_irqrestore(&priv->lock, flags);
7102
7103         mutex_lock(&priv->mutex);
7104         if (priv->iw_mode == NL80211_IFTYPE_AP)
7105                 iwl3945_activate_qos(priv, 1);
7106         else if (priv->assoc_id && iwl3945_is_associated(priv))
7107                 iwl3945_activate_qos(priv, 0);
7108
7109         mutex_unlock(&priv->mutex);
7110
7111         IWL_DEBUG_MAC80211("leave\n");
7112         return 0;
7113 }
7114
7115 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7116                                 struct ieee80211_tx_queue_stats *stats)
7117 {
7118         struct iwl3945_priv *priv = hw->priv;
7119         int i, avail;
7120         struct iwl3945_tx_queue *txq;
7121         struct iwl3945_queue *q;
7122         unsigned long flags;
7123
7124         IWL_DEBUG_MAC80211("enter\n");
7125
7126         if (!iwl3945_is_ready_rf(priv)) {
7127                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7128                 return -EIO;
7129         }
7130
7131         spin_lock_irqsave(&priv->lock, flags);
7132
7133         for (i = 0; i < AC_NUM; i++) {
7134                 txq = &priv->txq[i];
7135                 q = &txq->q;
7136                 avail = iwl3945_queue_space(q);
7137
7138                 stats[i].len = q->n_window - avail;
7139                 stats[i].limit = q->n_window - q->high_mark;
7140                 stats[i].count = q->n_window;
7141
7142         }
7143         spin_unlock_irqrestore(&priv->lock, flags);
7144
7145         IWL_DEBUG_MAC80211("leave\n");
7146
7147         return 0;
7148 }
7149
7150 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7151                              struct ieee80211_low_level_stats *stats)
7152 {
7153         IWL_DEBUG_MAC80211("enter\n");
7154         IWL_DEBUG_MAC80211("leave\n");
7155
7156         return 0;
7157 }
7158
7159 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7160 {
7161         struct iwl3945_priv *priv = hw->priv;
7162         unsigned long flags;
7163
7164         mutex_lock(&priv->mutex);
7165         IWL_DEBUG_MAC80211("enter\n");
7166
7167         iwl3945_reset_qos(priv);
7168
7169         spin_lock_irqsave(&priv->lock, flags);
7170         priv->assoc_id = 0;
7171         priv->assoc_capability = 0;
7172         priv->call_post_assoc_from_beacon = 0;
7173
7174         /* new association get rid of ibss beacon skb */
7175         if (priv->ibss_beacon)
7176                 dev_kfree_skb(priv->ibss_beacon);
7177
7178         priv->ibss_beacon = NULL;
7179
7180         priv->beacon_int = priv->hw->conf.beacon_int;
7181         priv->timestamp1 = 0;
7182         priv->timestamp0 = 0;
7183         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
7184                 priv->beacon_int = 0;
7185
7186         spin_unlock_irqrestore(&priv->lock, flags);
7187
7188         if (!iwl3945_is_ready_rf(priv)) {
7189                 IWL_DEBUG_MAC80211("leave - not ready\n");
7190                 mutex_unlock(&priv->mutex);
7191                 return;
7192         }
7193
7194         /* we are restarting association process
7195          * clear RXON_FILTER_ASSOC_MSK bit
7196         */
7197         if (priv->iw_mode != NL80211_IFTYPE_AP) {
7198                 iwl3945_scan_cancel_timeout(priv, 100);
7199                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7200                 iwl3945_commit_rxon(priv);
7201         }
7202
7203         /* Per mac80211.h: This is only used in IBSS mode... */
7204         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7205
7206                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7207                 mutex_unlock(&priv->mutex);
7208                 return;
7209         }
7210
7211         iwl3945_set_rate(priv);
7212
7213         mutex_unlock(&priv->mutex);
7214
7215         IWL_DEBUG_MAC80211("leave\n");
7216
7217 }
7218
7219 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
7220 {
7221         struct iwl3945_priv *priv = hw->priv;
7222         unsigned long flags;
7223
7224         IWL_DEBUG_MAC80211("enter\n");
7225
7226         if (!iwl3945_is_ready_rf(priv)) {
7227                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7228                 return -EIO;
7229         }
7230
7231         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7232                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7233                 return -EIO;
7234         }
7235
7236         spin_lock_irqsave(&priv->lock, flags);
7237
7238         if (priv->ibss_beacon)
7239                 dev_kfree_skb(priv->ibss_beacon);
7240
7241         priv->ibss_beacon = skb;
7242
7243         priv->assoc_id = 0;
7244
7245         IWL_DEBUG_MAC80211("leave\n");
7246         spin_unlock_irqrestore(&priv->lock, flags);
7247
7248         iwl3945_reset_qos(priv);
7249
7250         iwl3945_post_associate(priv);
7251
7252
7253         return 0;
7254 }
7255
7256 /*****************************************************************************
7257  *
7258  * sysfs attributes
7259  *
7260  *****************************************************************************/
7261
7262 #ifdef CONFIG_IWL3945_DEBUG
7263
7264 /*
7265  * The following adds a new attribute to the sysfs representation
7266  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7267  * used for controlling the debug level.
7268  *
7269  * See the level definitions in iwl for details.
7270  */
7271
7272 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7273 {
7274         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7275 }
7276 static ssize_t store_debug_level(struct device_driver *d,
7277                                  const char *buf, size_t count)
7278 {
7279         char *p = (char *)buf;
7280         u32 val;
7281
7282         val = simple_strtoul(p, &p, 0);
7283         if (p == buf)
7284                 printk(KERN_INFO DRV_NAME
7285                        ": %s is not in hex or decimal form.\n", buf);
7286         else
7287                 iwl3945_debug_level = val;
7288
7289         return strnlen(buf, count);
7290 }
7291
7292 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7293                    show_debug_level, store_debug_level);
7294
7295 #endif /* CONFIG_IWL3945_DEBUG */
7296
7297 static ssize_t show_temperature(struct device *d,
7298                                 struct device_attribute *attr, char *buf)
7299 {
7300         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7301
7302         if (!iwl3945_is_alive(priv))
7303                 return -EAGAIN;
7304
7305         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7306 }
7307
7308 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7309
7310 static ssize_t show_tx_power(struct device *d,
7311                              struct device_attribute *attr, char *buf)
7312 {
7313         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7314         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7315 }
7316
7317 static ssize_t store_tx_power(struct device *d,
7318                               struct device_attribute *attr,
7319                               const char *buf, size_t count)
7320 {
7321         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7322         char *p = (char *)buf;
7323         u32 val;
7324
7325         val = simple_strtoul(p, &p, 10);
7326         if (p == buf)
7327                 printk(KERN_INFO DRV_NAME
7328                        ": %s is not in decimal form.\n", buf);
7329         else
7330                 iwl3945_hw_reg_set_txpower(priv, val);
7331
7332         return count;
7333 }
7334
7335 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7336
7337 static ssize_t show_flags(struct device *d,
7338                           struct device_attribute *attr, char *buf)
7339 {
7340         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7341
7342         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7343 }
7344
7345 static ssize_t store_flags(struct device *d,
7346                            struct device_attribute *attr,
7347                            const char *buf, size_t count)
7348 {
7349         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7350         u32 flags = simple_strtoul(buf, NULL, 0);
7351
7352         mutex_lock(&priv->mutex);
7353         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7354                 /* Cancel any currently running scans... */
7355                 if (iwl3945_scan_cancel_timeout(priv, 100))
7356                         IWL_WARNING("Could not cancel scan.\n");
7357                 else {
7358                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7359                                        flags);
7360                         priv->staging_rxon.flags = cpu_to_le32(flags);
7361                         iwl3945_commit_rxon(priv);
7362                 }
7363         }
7364         mutex_unlock(&priv->mutex);
7365
7366         return count;
7367 }
7368
7369 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7370
7371 static ssize_t show_filter_flags(struct device *d,
7372                                  struct device_attribute *attr, char *buf)
7373 {
7374         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7375
7376         return sprintf(buf, "0x%04X\n",
7377                 le32_to_cpu(priv->active_rxon.filter_flags));
7378 }
7379
7380 static ssize_t store_filter_flags(struct device *d,
7381                                   struct device_attribute *attr,
7382                                   const char *buf, size_t count)
7383 {
7384         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7385         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7386
7387         mutex_lock(&priv->mutex);
7388         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7389                 /* Cancel any currently running scans... */
7390                 if (iwl3945_scan_cancel_timeout(priv, 100))
7391                         IWL_WARNING("Could not cancel scan.\n");
7392                 else {
7393                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7394                                        "0x%04X\n", filter_flags);
7395                         priv->staging_rxon.filter_flags =
7396                                 cpu_to_le32(filter_flags);
7397                         iwl3945_commit_rxon(priv);
7398                 }
7399         }
7400         mutex_unlock(&priv->mutex);
7401
7402         return count;
7403 }
7404
7405 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7406                    store_filter_flags);
7407
7408 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7409
7410 static ssize_t show_measurement(struct device *d,
7411                                 struct device_attribute *attr, char *buf)
7412 {
7413         struct iwl3945_priv *priv = dev_get_drvdata(d);
7414         struct iwl_spectrum_notification measure_report;
7415         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7416         u8 *data = (u8 *)&measure_report;
7417         unsigned long flags;
7418
7419         spin_lock_irqsave(&priv->lock, flags);
7420         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7421                 spin_unlock_irqrestore(&priv->lock, flags);
7422                 return 0;
7423         }
7424         memcpy(&measure_report, &priv->measure_report, size);
7425         priv->measurement_status = 0;
7426         spin_unlock_irqrestore(&priv->lock, flags);
7427
7428         while (size && (PAGE_SIZE - len)) {
7429                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7430                                    PAGE_SIZE - len, 1);
7431                 len = strlen(buf);
7432                 if (PAGE_SIZE - len)
7433                         buf[len++] = '\n';
7434
7435                 ofs += 16;
7436                 size -= min(size, 16U);
7437         }
7438
7439         return len;
7440 }
7441
7442 static ssize_t store_measurement(struct device *d,
7443                                  struct device_attribute *attr,
7444                                  const char *buf, size_t count)
7445 {
7446         struct iwl3945_priv *priv = dev_get_drvdata(d);
7447         struct ieee80211_measurement_params params = {
7448                 .channel = le16_to_cpu(priv->active_rxon.channel),
7449                 .start_time = cpu_to_le64(priv->last_tsf),
7450                 .duration = cpu_to_le16(1),
7451         };
7452         u8 type = IWL_MEASURE_BASIC;
7453         u8 buffer[32];
7454         u8 channel;
7455
7456         if (count) {
7457                 char *p = buffer;
7458                 strncpy(buffer, buf, min(sizeof(buffer), count));
7459                 channel = simple_strtoul(p, NULL, 0);
7460                 if (channel)
7461                         params.channel = channel;
7462
7463                 p = buffer;
7464                 while (*p && *p != ' ')
7465                         p++;
7466                 if (*p)
7467                         type = simple_strtoul(p + 1, NULL, 0);
7468         }
7469
7470         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7471                        "channel %d (for '%s')\n", type, params.channel, buf);
7472         iwl3945_get_measurement(priv, &params, type);
7473
7474         return count;
7475 }
7476
7477 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7478                    show_measurement, store_measurement);
7479 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7480
7481 static ssize_t store_retry_rate(struct device *d,
7482                                 struct device_attribute *attr,
7483                                 const char *buf, size_t count)
7484 {
7485         struct iwl3945_priv *priv = dev_get_drvdata(d);
7486
7487         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7488         if (priv->retry_rate <= 0)
7489                 priv->retry_rate = 1;
7490
7491         return count;
7492 }
7493
7494 static ssize_t show_retry_rate(struct device *d,
7495                                struct device_attribute *attr, char *buf)
7496 {
7497         struct iwl3945_priv *priv = dev_get_drvdata(d);
7498         return sprintf(buf, "%d", priv->retry_rate);
7499 }
7500
7501 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7502                    store_retry_rate);
7503
7504 static ssize_t store_power_level(struct device *d,
7505                                  struct device_attribute *attr,
7506                                  const char *buf, size_t count)
7507 {
7508         struct iwl3945_priv *priv = dev_get_drvdata(d);
7509         int rc;
7510         int mode;
7511
7512         mode = simple_strtoul(buf, NULL, 0);
7513         mutex_lock(&priv->mutex);
7514
7515         if (!iwl3945_is_ready(priv)) {
7516                 rc = -EAGAIN;
7517                 goto out;
7518         }
7519
7520         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7521                 mode = IWL_POWER_AC;
7522         else
7523                 mode |= IWL_POWER_ENABLED;
7524
7525         if (mode != priv->power_mode) {
7526                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7527                 if (rc) {
7528                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7529                         goto out;
7530                 }
7531                 priv->power_mode = mode;
7532         }
7533
7534         rc = count;
7535
7536  out:
7537         mutex_unlock(&priv->mutex);
7538         return rc;
7539 }
7540
7541 #define MAX_WX_STRING 80
7542
7543 /* Values are in microsecond */
7544 static const s32 timeout_duration[] = {
7545         350000,
7546         250000,
7547         75000,
7548         37000,
7549         25000,
7550 };
7551 static const s32 period_duration[] = {
7552         400000,
7553         700000,
7554         1000000,
7555         1000000,
7556         1000000
7557 };
7558
7559 static ssize_t show_power_level(struct device *d,
7560                                 struct device_attribute *attr, char *buf)
7561 {
7562         struct iwl3945_priv *priv = dev_get_drvdata(d);
7563         int level = IWL_POWER_LEVEL(priv->power_mode);
7564         char *p = buf;
7565
7566         p += sprintf(p, "%d ", level);
7567         switch (level) {
7568         case IWL_POWER_MODE_CAM:
7569         case IWL_POWER_AC:
7570                 p += sprintf(p, "(AC)");
7571                 break;
7572         case IWL_POWER_BATTERY:
7573                 p += sprintf(p, "(BATTERY)");
7574                 break;
7575         default:
7576                 p += sprintf(p,
7577                              "(Timeout %dms, Period %dms)",
7578                              timeout_duration[level - 1] / 1000,
7579                              period_duration[level - 1] / 1000);
7580         }
7581
7582         if (!(priv->power_mode & IWL_POWER_ENABLED))
7583                 p += sprintf(p, " OFF\n");
7584         else
7585                 p += sprintf(p, " \n");
7586
7587         return p - buf + 1;
7588
7589 }
7590
7591 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7592                    store_power_level);
7593
7594 static ssize_t show_channels(struct device *d,
7595                              struct device_attribute *attr, char *buf)
7596 {
7597         /* all this shit doesn't belong into sysfs anyway */
7598         return 0;
7599 }
7600
7601 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7602
7603 static ssize_t show_statistics(struct device *d,
7604                                struct device_attribute *attr, char *buf)
7605 {
7606         struct iwl3945_priv *priv = dev_get_drvdata(d);
7607         u32 size = sizeof(struct iwl3945_notif_statistics);
7608         u32 len = 0, ofs = 0;
7609         u8 *data = (u8 *)&priv->statistics;
7610         int rc = 0;
7611
7612         if (!iwl3945_is_alive(priv))
7613                 return -EAGAIN;
7614
7615         mutex_lock(&priv->mutex);
7616         rc = iwl3945_send_statistics_request(priv);
7617         mutex_unlock(&priv->mutex);
7618
7619         if (rc) {
7620                 len = sprintf(buf,
7621                               "Error sending statistics request: 0x%08X\n", rc);
7622                 return len;
7623         }
7624
7625         while (size && (PAGE_SIZE - len)) {
7626                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7627                                    PAGE_SIZE - len, 1);
7628                 len = strlen(buf);
7629                 if (PAGE_SIZE - len)
7630                         buf[len++] = '\n';
7631
7632                 ofs += 16;
7633                 size -= min(size, 16U);
7634         }
7635
7636         return len;
7637 }
7638
7639 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7640
7641 static ssize_t show_antenna(struct device *d,
7642                             struct device_attribute *attr, char *buf)
7643 {
7644         struct iwl3945_priv *priv = dev_get_drvdata(d);
7645
7646         if (!iwl3945_is_alive(priv))
7647                 return -EAGAIN;
7648
7649         return sprintf(buf, "%d\n", priv->antenna);
7650 }
7651
7652 static ssize_t store_antenna(struct device *d,
7653                              struct device_attribute *attr,
7654                              const char *buf, size_t count)
7655 {
7656         int ant;
7657         struct iwl3945_priv *priv = dev_get_drvdata(d);
7658
7659         if (count == 0)
7660                 return 0;
7661
7662         if (sscanf(buf, "%1i", &ant) != 1) {
7663                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7664                 return count;
7665         }
7666
7667         if ((ant >= 0) && (ant <= 2)) {
7668                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7669                 priv->antenna = (enum iwl3945_antenna)ant;
7670         } else
7671                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7672
7673
7674         return count;
7675 }
7676
7677 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7678
7679 static ssize_t show_status(struct device *d,
7680                            struct device_attribute *attr, char *buf)
7681 {
7682         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7683         if (!iwl3945_is_alive(priv))
7684                 return -EAGAIN;
7685         return sprintf(buf, "0x%08x\n", (int)priv->status);
7686 }
7687
7688 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7689
7690 static ssize_t dump_error_log(struct device *d,
7691                               struct device_attribute *attr,
7692                               const char *buf, size_t count)
7693 {
7694         char *p = (char *)buf;
7695
7696         if (p[0] == '1')
7697                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7698
7699         return strnlen(buf, count);
7700 }
7701
7702 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7703
7704 static ssize_t dump_event_log(struct device *d,
7705                               struct device_attribute *attr,
7706                               const char *buf, size_t count)
7707 {
7708         char *p = (char *)buf;
7709
7710         if (p[0] == '1')
7711                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7712
7713         return strnlen(buf, count);
7714 }
7715
7716 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7717
7718 /*****************************************************************************
7719  *
7720  * driver setup and tear down
7721  *
7722  *****************************************************************************/
7723
7724 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7725 {
7726         priv->workqueue = create_workqueue(DRV_NAME);
7727
7728         init_waitqueue_head(&priv->wait_command_queue);
7729
7730         INIT_WORK(&priv->up, iwl3945_bg_up);
7731         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7732         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7733         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7734         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7735         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7736         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7737         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7738         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7739         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7740         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7741
7742         iwl3945_hw_setup_deferred_work(priv);
7743
7744         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7745                      iwl3945_irq_tasklet, (unsigned long)priv);
7746 }
7747
7748 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7749 {
7750         iwl3945_hw_cancel_deferred_work(priv);
7751
7752         cancel_delayed_work_sync(&priv->init_alive_start);
7753         cancel_delayed_work(&priv->scan_check);
7754         cancel_delayed_work(&priv->alive_start);
7755         cancel_work_sync(&priv->beacon_update);
7756 }
7757
7758 static struct attribute *iwl3945_sysfs_entries[] = {
7759         &dev_attr_antenna.attr,
7760         &dev_attr_channels.attr,
7761         &dev_attr_dump_errors.attr,
7762         &dev_attr_dump_events.attr,
7763         &dev_attr_flags.attr,
7764         &dev_attr_filter_flags.attr,
7765 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7766         &dev_attr_measurement.attr,
7767 #endif
7768         &dev_attr_power_level.attr,
7769         &dev_attr_retry_rate.attr,
7770         &dev_attr_statistics.attr,
7771         &dev_attr_status.attr,
7772         &dev_attr_temperature.attr,
7773         &dev_attr_tx_power.attr,
7774
7775         NULL
7776 };
7777
7778 static struct attribute_group iwl3945_attribute_group = {
7779         .name = NULL,           /* put in device directory */
7780         .attrs = iwl3945_sysfs_entries,
7781 };
7782
7783 static struct ieee80211_ops iwl3945_hw_ops = {
7784         .tx = iwl3945_mac_tx,
7785         .start = iwl3945_mac_start,
7786         .stop = iwl3945_mac_stop,
7787         .add_interface = iwl3945_mac_add_interface,
7788         .remove_interface = iwl3945_mac_remove_interface,
7789         .config = iwl3945_mac_config,
7790         .config_interface = iwl3945_mac_config_interface,
7791         .configure_filter = iwl3945_configure_filter,
7792         .set_key = iwl3945_mac_set_key,
7793         .get_stats = iwl3945_mac_get_stats,
7794         .get_tx_stats = iwl3945_mac_get_tx_stats,
7795         .conf_tx = iwl3945_mac_conf_tx,
7796         .reset_tsf = iwl3945_mac_reset_tsf,
7797         .bss_info_changed = iwl3945_bss_info_changed,
7798         .hw_scan = iwl3945_mac_hw_scan
7799 };
7800
7801 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7802 {
7803         int err = 0;
7804         struct iwl3945_priv *priv;
7805         struct ieee80211_hw *hw;
7806         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7807         unsigned long flags;
7808
7809         /***********************
7810          * 1. Allocating HW data
7811          * ********************/
7812
7813         /* Disabling hardware scan means that mac80211 will perform scans
7814          * "the hard way", rather than using device's scan. */
7815         if (iwl3945_param_disable_hw_scan) {
7816                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7817                 iwl3945_hw_ops.hw_scan = NULL;
7818         }
7819
7820         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7821             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7822                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7823                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7824                 err = -EINVAL;
7825                 goto out;
7826         }
7827
7828         /* mac80211 allocates memory for this device instance, including
7829          *   space for this driver's private structure */
7830         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7831         if (hw == NULL) {
7832                 IWL_ERROR("Can not allocate network device\n");
7833                 err = -ENOMEM;
7834                 goto out;
7835         }
7836
7837         SET_IEEE80211_DEV(hw, &pdev->dev);
7838
7839         priv = hw->priv;
7840         priv->hw = hw;
7841         priv->pci_dev = pdev;
7842         priv->cfg = cfg;
7843
7844         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7845         hw->rate_control_algorithm = "iwl-3945-rs";
7846         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
7847
7848         /* Select antenna (may be helpful if only one antenna is connected) */
7849         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7850 #ifdef CONFIG_IWL3945_DEBUG
7851         iwl3945_debug_level = iwl3945_param_debug;
7852         atomic_set(&priv->restrict_refcnt, 0);
7853 #endif
7854
7855         /* Tell mac80211 our characteristics */
7856         hw->flags = IEEE80211_HW_SIGNAL_DBM |
7857                     IEEE80211_HW_NOISE_DBM;
7858
7859         hw->wiphy->interface_modes =
7860                 BIT(NL80211_IFTYPE_STATION) |
7861                 BIT(NL80211_IFTYPE_ADHOC);
7862
7863         hw->wiphy->fw_handles_regulatory = true;
7864
7865         /* 4 EDCA QOS priorities */
7866         hw->queues = 4;
7867
7868         /***************************
7869          * 2. Initializing PCI bus
7870          * *************************/
7871         if (pci_enable_device(pdev)) {
7872                 err = -ENODEV;
7873                 goto out_ieee80211_free_hw;
7874         }
7875
7876         pci_set_master(pdev);
7877
7878         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7879         if (!err)
7880                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7881         if (err) {
7882                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
7883                 goto out_pci_disable_device;
7884         }
7885
7886         pci_set_drvdata(pdev, priv);
7887         err = pci_request_regions(pdev, DRV_NAME);
7888         if (err)
7889                 goto out_pci_disable_device;
7890
7891         /***********************
7892          * 3. Read REV Register
7893          * ********************/
7894         priv->hw_base = pci_iomap(pdev, 0, 0);
7895         if (!priv->hw_base) {
7896                 err = -ENODEV;
7897                 goto out_pci_release_regions;
7898         }
7899
7900         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7901                         (unsigned long long) pci_resource_len(pdev, 0));
7902         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7903
7904         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7905          * PCI Tx retries from interfering with C3 CPU state */
7906         pci_write_config_byte(pdev, 0x41, 0x00);
7907
7908         /* nic init */
7909         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7910                         CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7911
7912         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7913         err = iwl3945_poll_direct_bit(priv, CSR_GP_CNTRL,
7914                                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7915         if (err < 0) {
7916                 IWL_DEBUG_INFO("Failed to init the card\n");
7917                 goto out_remove_sysfs;
7918         }
7919
7920         /***********************
7921          * 4. Read EEPROM
7922          * ********************/
7923         /* Read the EEPROM */
7924         err = iwl3945_eeprom_init(priv);
7925         if (err) {
7926                 IWL_ERROR("Unable to init EEPROM\n");
7927                 goto out_remove_sysfs;
7928         }
7929         /* MAC Address location in EEPROM same for 3945/4965 */
7930         get_eeprom_mac(priv, priv->mac_addr);
7931         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
7932         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7933
7934         /***********************
7935          * 5. Setup HW Constants
7936          * ********************/
7937         /* Device-specific setup */
7938         if (iwl3945_hw_set_hw_setting(priv)) {
7939                 IWL_ERROR("failed to set hw settings\n");
7940                 goto out_iounmap;
7941         }
7942
7943         /***********************
7944          * 6. Setup priv
7945          * ********************/
7946         priv->retry_rate = 1;
7947         priv->ibss_beacon = NULL;
7948
7949         spin_lock_init(&priv->lock);
7950         spin_lock_init(&priv->power_data.lock);
7951         spin_lock_init(&priv->sta_lock);
7952         spin_lock_init(&priv->hcmd_lock);
7953
7954         INIT_LIST_HEAD(&priv->free_frames);
7955         mutex_init(&priv->mutex);
7956
7957         /* Clear the driver's (not device's) station table */
7958         iwl3945_clear_stations_table(priv);
7959
7960         priv->data_retry_limit = -1;
7961         priv->ieee_channels = NULL;
7962         priv->ieee_rates = NULL;
7963         priv->band = IEEE80211_BAND_2GHZ;
7964
7965         priv->iw_mode = NL80211_IFTYPE_STATION;
7966
7967         iwl3945_reset_qos(priv);
7968
7969         priv->qos_data.qos_active = 0;
7970         priv->qos_data.qos_cap.val = 0;
7971
7972
7973         priv->rates_mask = IWL_RATES_MASK;
7974         /* If power management is turned on, default to AC mode */
7975         priv->power_mode = IWL_POWER_AC;
7976         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
7977
7978         err = iwl3945_init_channel_map(priv);
7979         if (err) {
7980                 IWL_ERROR("initializing regulatory failed: %d\n", err);
7981                 goto out_release_irq;
7982         }
7983
7984         err = iwl3945_init_geos(priv);
7985         if (err) {
7986                 IWL_ERROR("initializing geos failed: %d\n", err);
7987                 goto out_free_channel_map;
7988         }
7989
7990         printk(KERN_INFO DRV_NAME
7991                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7992
7993         /***********************************
7994          * 7. Initialize Module Parameters
7995          * **********************************/
7996
7997         /* Initialize module parameter values here */
7998         /* Disable radio (SW RF KILL) via parameter when loading driver */
7999         if (iwl3945_param_disable) {
8000                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8001                 IWL_DEBUG_INFO("Radio disabled.\n");
8002         }
8003
8004
8005         /***********************
8006          * 8. Setup Services
8007          * ********************/
8008
8009         spin_lock_irqsave(&priv->lock, flags);
8010         iwl3945_disable_interrupts(priv);
8011         spin_unlock_irqrestore(&priv->lock, flags);
8012
8013         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8014         if (err) {
8015                 IWL_ERROR("failed to create sysfs device attributes\n");
8016                 goto out_free_geos;
8017         }
8018
8019         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8020         iwl3945_setup_deferred_work(priv);
8021         iwl3945_setup_rx_handlers(priv);
8022
8023         /***********************
8024          * 9. Conclude
8025          * ********************/
8026         pci_save_state(pdev);
8027         pci_disable_device(pdev);
8028
8029         /*********************************
8030          * 10. Setup and Register mac80211
8031          * *******************************/
8032
8033         err = ieee80211_register_hw(priv->hw);
8034         if (err) {
8035                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8036                 goto  out_remove_sysfs;
8037         }
8038
8039         priv->hw->conf.beacon_int = 100;
8040         priv->mac80211_registered = 1;
8041
8042
8043         err = iwl3945_rfkill_init(priv);
8044         if (err)
8045                 IWL_ERROR("Unable to initialize RFKILL system. "
8046                                   "Ignoring error: %d\n", err);
8047
8048         return 0;
8049
8050  out_remove_sysfs:
8051         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8052  out_free_geos:
8053         iwl3945_free_geos(priv);
8054  out_free_channel_map:
8055         iwl3945_free_channel_map(priv);
8056
8057
8058  out_release_irq:
8059         destroy_workqueue(priv->workqueue);
8060         priv->workqueue = NULL;
8061         iwl3945_unset_hw_setting(priv);
8062
8063  out_iounmap:
8064         pci_iounmap(pdev, priv->hw_base);
8065  out_pci_release_regions:
8066         pci_release_regions(pdev);
8067  out_pci_disable_device:
8068         pci_disable_device(pdev);
8069         pci_set_drvdata(pdev, NULL);
8070  out_ieee80211_free_hw:
8071         ieee80211_free_hw(priv->hw);
8072  out:
8073         return err;
8074 }
8075
8076 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8077 {
8078         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8079         unsigned long flags;
8080
8081         if (!priv)
8082                 return;
8083
8084         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8085
8086         set_bit(STATUS_EXIT_PENDING, &priv->status);
8087
8088         iwl3945_down(priv);
8089
8090         /* make sure we flush any pending irq or
8091          * tasklet for the driver
8092          */
8093         spin_lock_irqsave(&priv->lock, flags);
8094         iwl3945_disable_interrupts(priv);
8095         spin_unlock_irqrestore(&priv->lock, flags);
8096
8097         iwl_synchronize_irq(priv);
8098
8099         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8100
8101         iwl3945_rfkill_unregister(priv);
8102         iwl3945_dealloc_ucode_pci(priv);
8103
8104         if (priv->rxq.bd)
8105                 iwl3945_rx_queue_free(priv, &priv->rxq);
8106         iwl3945_hw_txq_ctx_free(priv);
8107
8108         iwl3945_unset_hw_setting(priv);
8109         iwl3945_clear_stations_table(priv);
8110
8111         if (priv->mac80211_registered)
8112                 ieee80211_unregister_hw(priv->hw);
8113
8114         /*netif_stop_queue(dev); */
8115         flush_workqueue(priv->workqueue);
8116
8117         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8118          * priv->workqueue... so we can't take down the workqueue
8119          * until now... */
8120         destroy_workqueue(priv->workqueue);
8121         priv->workqueue = NULL;
8122
8123         pci_iounmap(pdev, priv->hw_base);
8124         pci_release_regions(pdev);
8125         pci_disable_device(pdev);
8126         pci_set_drvdata(pdev, NULL);
8127
8128         iwl3945_free_channel_map(priv);
8129         iwl3945_free_geos(priv);
8130         kfree(priv->scan);
8131         if (priv->ibss_beacon)
8132                 dev_kfree_skb(priv->ibss_beacon);
8133
8134         ieee80211_free_hw(priv->hw);
8135 }
8136
8137 #ifdef CONFIG_PM
8138
8139 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8140 {
8141         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8142
8143         if (priv->is_open) {
8144                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8145                 iwl3945_mac_stop(priv->hw);
8146                 priv->is_open = 1;
8147         }
8148
8149         pci_set_power_state(pdev, PCI_D3hot);
8150
8151         return 0;
8152 }
8153
8154 static int iwl3945_pci_resume(struct pci_dev *pdev)
8155 {
8156         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8157
8158         pci_set_power_state(pdev, PCI_D0);
8159
8160         if (priv->is_open)
8161                 iwl3945_mac_start(priv->hw);
8162
8163         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8164         return 0;
8165 }
8166
8167 #endif /* CONFIG_PM */
8168
8169 /*************** RFKILL FUNCTIONS **********/
8170 #ifdef CONFIG_IWL3945_RFKILL
8171 /* software rf-kill from user */
8172 static int iwl3945_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
8173 {
8174         struct iwl3945_priv *priv = data;
8175         int err = 0;
8176
8177         if (!priv->rfkill)
8178         return 0;
8179
8180         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
8181                 return 0;
8182
8183         IWL_DEBUG_RF_KILL("we received soft RFKILL set to state %d\n", state);
8184         mutex_lock(&priv->mutex);
8185
8186         switch (state) {
8187         case RFKILL_STATE_UNBLOCKED:
8188                 if (iwl3945_is_rfkill_hw(priv)) {
8189                         err = -EBUSY;
8190                         goto out_unlock;
8191                 }
8192                 iwl3945_radio_kill_sw(priv, 0);
8193                 break;
8194         case RFKILL_STATE_SOFT_BLOCKED:
8195                 iwl3945_radio_kill_sw(priv, 1);
8196                 break;
8197         default:
8198                 IWL_WARNING("we received unexpected RFKILL state %d\n", state);
8199                 break;
8200         }
8201 out_unlock:
8202         mutex_unlock(&priv->mutex);
8203
8204         return err;
8205 }
8206
8207 int iwl3945_rfkill_init(struct iwl3945_priv *priv)
8208 {
8209         struct device *device = wiphy_dev(priv->hw->wiphy);
8210         int ret = 0;
8211
8212         BUG_ON(device == NULL);
8213
8214         IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
8215         priv->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
8216         if (!priv->rfkill) {
8217                 IWL_ERROR("Unable to allocate rfkill device.\n");
8218                 ret = -ENOMEM;
8219                 goto error;
8220         }
8221
8222         priv->rfkill->name = priv->cfg->name;
8223         priv->rfkill->data = priv;
8224         priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
8225         priv->rfkill->toggle_radio = iwl3945_rfkill_soft_rf_kill;
8226         priv->rfkill->user_claim_unsupported = 1;
8227
8228         priv->rfkill->dev.class->suspend = NULL;
8229         priv->rfkill->dev.class->resume = NULL;
8230
8231         ret = rfkill_register(priv->rfkill);
8232         if (ret) {
8233                 IWL_ERROR("Unable to register rfkill: %d\n", ret);
8234                 goto freed_rfkill;
8235         }
8236
8237         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8238         return ret;
8239
8240 freed_rfkill:
8241         if (priv->rfkill != NULL)
8242                 rfkill_free(priv->rfkill);
8243         priv->rfkill = NULL;
8244
8245 error:
8246         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8247         return ret;
8248 }
8249
8250 void iwl3945_rfkill_unregister(struct iwl3945_priv *priv)
8251 {
8252         if (priv->rfkill)
8253                 rfkill_unregister(priv->rfkill);
8254
8255         priv->rfkill = NULL;
8256 }
8257
8258 /* set rf-kill to the right state. */
8259 void iwl3945_rfkill_set_hw_state(struct iwl3945_priv *priv)
8260 {
8261
8262         if (!priv->rfkill)
8263                 return;
8264
8265         if (iwl3945_is_rfkill_hw(priv)) {
8266                 rfkill_force_state(priv->rfkill, RFKILL_STATE_HARD_BLOCKED);
8267                 return;
8268         }
8269
8270         if (!iwl3945_is_rfkill_sw(priv))
8271                 rfkill_force_state(priv->rfkill, RFKILL_STATE_UNBLOCKED);
8272         else
8273                 rfkill_force_state(priv->rfkill, RFKILL_STATE_SOFT_BLOCKED);
8274 }
8275 #endif
8276
8277 /*****************************************************************************
8278  *
8279  * driver and module entry point
8280  *
8281  *****************************************************************************/
8282
8283 static struct pci_driver iwl3945_driver = {
8284         .name = DRV_NAME,
8285         .id_table = iwl3945_hw_card_ids,
8286         .probe = iwl3945_pci_probe,
8287         .remove = __devexit_p(iwl3945_pci_remove),
8288 #ifdef CONFIG_PM
8289         .suspend = iwl3945_pci_suspend,
8290         .resume = iwl3945_pci_resume,
8291 #endif
8292 };
8293
8294 static int __init iwl3945_init(void)
8295 {
8296
8297         int ret;
8298         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8299         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8300
8301         ret = iwl3945_rate_control_register();
8302         if (ret) {
8303                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8304                 return ret;
8305         }
8306
8307         ret = pci_register_driver(&iwl3945_driver);
8308         if (ret) {
8309                 IWL_ERROR("Unable to initialize PCI module\n");
8310                 goto error_register;
8311         }
8312 #ifdef CONFIG_IWL3945_DEBUG
8313         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8314         if (ret) {
8315                 IWL_ERROR("Unable to create driver sysfs file\n");
8316                 goto error_debug;
8317         }
8318 #endif
8319
8320         return ret;
8321
8322 #ifdef CONFIG_IWL3945_DEBUG
8323 error_debug:
8324         pci_unregister_driver(&iwl3945_driver);
8325 #endif
8326 error_register:
8327         iwl3945_rate_control_unregister();
8328         return ret;
8329 }
8330
8331 static void __exit iwl3945_exit(void)
8332 {
8333 #ifdef CONFIG_IWL3945_DEBUG
8334         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8335 #endif
8336         pci_unregister_driver(&iwl3945_driver);
8337         iwl3945_rate_control_unregister();
8338 }
8339
8340 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
8341
8342 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8343 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8344 module_param_named(disable, iwl3945_param_disable, int, 0444);
8345 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8346 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8347 MODULE_PARM_DESC(hwcrypto,
8348                  "using hardware crypto engine (default 0 [software])\n");
8349 module_param_named(debug, iwl3945_param_debug, uint, 0444);
8350 MODULE_PARM_DESC(debug, "debug output mask");
8351 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8352 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8353
8354 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8355 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8356
8357 module_exit(iwl3945_exit);
8358 module_init(iwl3945_init);