git.oblomov.eu Git - linux-2.6/blob - 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-3945.h"
  51 #include "iwl-helpers.h"
  52
  53 #ifdef CONFIG_IWL3945_DEBUG
  54 u32 iwl3945_debug_level;
  55 #endif
  56
  57 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  58                                   struct iwl3945_tx_queue *txq);
  59
  60 /******************************************************************************
  61  *
  62  * module boiler plate
  63  *
  64  ******************************************************************************/
  65
  66 /* module parameters */
  67 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  68 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  69 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  70 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  71 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  72 int iwl3945_param_queues_num = IWL39_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION \
  80 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  81
  82 #ifdef CONFIG_IWL3945_DEBUG
  83 #define VD "d"
  84 #else
  85 #define VD
  86 #endif
  87
  88 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  89 #define VS "s"
  90 #else
  91 #define VS
  92 #endif
  93
  94 #define IWLWIFI_VERSION "1.2.26k" VD VS
  95 #define DRV_COPYRIGHT   "Copyright(c) 2003-2008 Intel Corporation"
  96 #define DRV_VERSION     IWLWIFI_VERSION
  97
  98
  99 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 100 MODULE_VERSION(DRV_VERSION);
 101 MODULE_AUTHOR(DRV_COPYRIGHT);
 102 MODULE_LICENSE("GPL");
 103
 104 static const struct ieee80211_supported_band *iwl3945_get_band(
 105                 struct iwl3945_priv *priv, enum ieee80211_band band)
 106 {
 107         return priv->hw->wiphy->bands[band];
 108 }
 109
 110 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 111  * DMA services
 112  *
 113  * Theory of operation
 114  *
 115  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 116  * of buffer descriptors, each of which points to one or more data buffers for
 117  * the device to read from or fill.  Driver and device exchange status of each
 118  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 119  * entries in each circular buffer, to protect against confusing empty and full
 120  * queue states.
 121  *
 122  * The device reads or writes the data in the queues via the device's several
 123  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 124  *
 125  * For Tx queue, there are low mark and high mark limits. If, after queuing
 126  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 127  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 128  * Tx queue resumed.
 129  *
 130  * The 3945 operates with six queues:  One receive queue, one transmit queue
 131  * (#4) for sending commands to the device firmware, and four transmit queues
 132  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 133  ***************************************************/
 134
 135 int iwl3945_queue_space(const struct iwl3945_queue *q)
 136 {
 137         int s = q->read_ptr - q->write_ptr;
 138
 139         if (q->read_ptr > q->write_ptr)
 140                 s -= q->n_bd;
 141
 142         if (s <= 0)
 143                 s += q->n_window;
 144         /* keep some reserve to not confuse empty and full situations */
 145         s -= 2;
 146         if (s < 0)
 147                 s = 0;
 148         return s;
 149 }
 150
 151 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 152 {
 153         return q->write_ptr > q->read_ptr ?
 154                 (i >= q->read_ptr && i < q->write_ptr) :
 155                 !(i < q->read_ptr && i >= q->write_ptr);
 156 }
 157
 158
 159 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 160 {
 161         /* This is for scan command, the big buffer at end of command array */
 162         if (is_huge)
 163                 return q->n_window;     /* must be power of 2 */
 164
 165         /* Otherwise, use normal size buffers */
 166         return index & (q->n_window - 1);
 167 }
 168
 169 /**
 170  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 171  */
 172 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 173                           int count, int slots_num, u32 id)
 174 {
 175         q->n_bd = count;
 176         q->n_window = slots_num;
 177         q->id = id;
 178
 179         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 180          * and iwl_queue_dec_wrap are broken. */
 181         BUG_ON(!is_power_of_2(count));
 182
 183         /* slots_num must be power-of-two size, otherwise
 184          * get_cmd_index is broken. */
 185         BUG_ON(!is_power_of_2(slots_num));
 186
 187         q->low_mark = q->n_window / 4;
 188         if (q->low_mark < 4)
 189                 q->low_mark = 4;
 190
 191         q->high_mark = q->n_window / 8;
 192         if (q->high_mark < 2)
 193                 q->high_mark = 2;
 194
 195         q->write_ptr = q->read_ptr = 0;
 196
 197         return 0;
 198 }
 199
 200 /**
 201  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 202  */
 203 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 204                               struct iwl3945_tx_queue *txq, u32 id)
 205 {
 206         struct pci_dev *dev = priv->pci_dev;
 207
 208         /* Driver private data, only for Tx (not command) queues,
 209          * not shared with device. */
 210         if (id != IWL_CMD_QUEUE_NUM) {
 211                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 212                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 213                 if (!txq->txb) {
 214                         IWL_ERROR("kmalloc for auxiliary BD "
 215                                   "structures failed\n");
 216                         goto error;
 217                 }
 218         } else
 219                 txq->txb = NULL;
 220
 221         /* Circular buffer of transmit frame descriptors (TFDs),
 222          * shared with device */
 223         txq->bd = pci_alloc_consistent(dev,
 224                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 225                         &txq->q.dma_addr);
 226
 227         if (!txq->bd) {
 228                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 229                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 230                 goto error;
 231         }
 232         txq->q.id = id;
 233
 234         return 0;
 235
 236  error:
 237         kfree(txq->txb);
 238         txq->txb = NULL;
 239
 240         return -ENOMEM;
 241 }
 242
 243 /**
 244  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 245  */
 246 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 247                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 248 {
 249         struct pci_dev *dev = priv->pci_dev;
 250         int len;
 251         int rc = 0;
 252
 253         /*
 254          * Alloc buffer array for commands (Tx or other types of commands).
 255          * For the command queue (#4), allocate command space + one big
 256          * command for scan, since scan command is very huge; the system will
 257          * not have two scans at the same time, so only one is needed.
 258          * For data Tx queues (all other queues), no super-size command
 259          * space is needed.
 260          */
 261         len = sizeof(struct iwl3945_cmd) * slots_num;
 262         if (txq_id == IWL_CMD_QUEUE_NUM)
 263                 len +=  IWL_MAX_SCAN_SIZE;
 264         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 265         if (!txq->cmd)
 266                 return -ENOMEM;
 267
 268         /* Alloc driver data array and TFD circular buffer */
 269         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 270         if (rc) {
 271                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 272
 273                 return -ENOMEM;
 274         }
 275         txq->need_update = 0;
 276
 277         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 278          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 279         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 280
 281         /* Initialize queue high/low-water, head/tail indexes */
 282         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 283
 284         /* Tell device where to find queue, enable DMA channel. */
 285         iwl3945_hw_tx_queue_init(priv, txq);
 286
 287         return 0;
 288 }
 289
 290 /**
 291  * iwl3945_tx_queue_free - Deallocate DMA queue.
 292  * @txq: Transmit queue to deallocate.
 293  *
 294  * Empty queue by removing and destroying all BD's.
 295  * Free all buffers.
 296  * 0-fill, but do not free "txq" descriptor structure.
 297  */
 298 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 299 {
 300         struct iwl3945_queue *q = &txq->q;
 301         struct pci_dev *dev = priv->pci_dev;
 302         int len;
 303
 304         if (q->n_bd == 0)
 305                 return;
 306
 307         /* first, empty all BD's */
 308         for (; q->write_ptr != q->read_ptr;
 309              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 310                 iwl3945_hw_txq_free_tfd(priv, txq);
 311
 312         len = sizeof(struct iwl3945_cmd) * q->n_window;
 313         if (q->id == IWL_CMD_QUEUE_NUM)
 314                 len += IWL_MAX_SCAN_SIZE;
 315
 316         /* De-alloc array of command/tx buffers */
 317         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 318
 319         /* De-alloc circular buffer of TFDs */
 320         if (txq->q.n_bd)
 321                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 322                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 323
 324         /* De-alloc array of per-TFD driver data */
 325         kfree(txq->txb);
 326         txq->txb = NULL;
 327
 328         /* 0-fill queue descriptor structure */
 329         memset(txq, 0, sizeof(*txq));
 330 }
 331
 332 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 333
 334 /*************** STATION TABLE MANAGEMENT ****
 335  * mac80211 should be examined to determine if sta_info is duplicating
 336  * the functionality provided here
 337  */
 338
 339 /**************************************************************/
 340 #if 0 /* temporary disable till we add real remove station */
 341 /**
 342  * iwl3945_remove_station - Remove driver's knowledge of station.
 343  *
 344  * NOTE:  This does not remove station from device's station table.
 345  */
 346 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 347 {
 348         int index = IWL_INVALID_STATION;
 349         int i;
 350         unsigned long flags;
 351
 352         spin_lock_irqsave(&priv->sta_lock, flags);
 353
 354         if (is_ap)
 355                 index = IWL_AP_ID;
 356         else if (is_broadcast_ether_addr(addr))
 357                 index = priv->hw_setting.bcast_sta_id;
 358         else
 359                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 360                         if (priv->stations[i].used &&
 361                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 362                                                 addr)) {
 363                                 index = i;
 364                                 break;
 365                         }
 366
 367         if (unlikely(index == IWL_INVALID_STATION))
 368                 goto out;
 369
 370         if (priv->stations[index].used) {
 371                 priv->stations[index].used = 0;
 372                 priv->num_stations--;
 373         }
 374
 375         BUG_ON(priv->num_stations < 0);
 376
 377 out:
 378         spin_unlock_irqrestore(&priv->sta_lock, flags);
 379         return 0;
 380 }
 381 #endif
 382
 383 /**
 384  * iwl3945_clear_stations_table - Clear the driver's station table
 385  *
 386  * NOTE:  This does not clear or otherwise alter the device's station table.
 387  */
 388 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 389 {
 390         unsigned long flags;
 391
 392         spin_lock_irqsave(&priv->sta_lock, flags);
 393
 394         priv->num_stations = 0;
 395         memset(priv->stations, 0, sizeof(priv->stations));
 396
 397         spin_unlock_irqrestore(&priv->sta_lock, flags);
 398 }
 399
 400 /**
 401  * iwl3945_add_station - Add station to station tables in driver and device
 402  */
 403 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 404 {
 405         int i;
 406         int index = IWL_INVALID_STATION;
 407         struct iwl3945_station_entry *station;
 408         unsigned long flags_spin;
 409         u8 rate;
 410
 411         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 412         if (is_ap)
 413                 index = IWL_AP_ID;
 414         else if (is_broadcast_ether_addr(addr))
 415                 index = priv->hw_setting.bcast_sta_id;
 416         else
 417                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 418                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 419                                                 addr)) {
 420                                 index = i;
 421                                 break;
 422                         }
 423
 424                         if (!priv->stations[i].used &&
 425                             index == IWL_INVALID_STATION)
 426                                 index = i;
 427                 }
 428
 429         /* These two conditions has the same outcome but keep them separate
 430           since they have different meaning */
 431         if (unlikely(index == IWL_INVALID_STATION)) {
 432                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 433                 return index;
 434         }
 435
 436         if (priv->stations[index].used &&
 437            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 438                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 439                 return index;
 440         }
 441
 442         IWL_DEBUG_ASSOC("Add STA ID %d: %pM\n", index, addr);
 443         station = &priv->stations[index];
 444         station->used = 1;
 445         priv->num_stations++;
 446
 447         /* Set up the REPLY_ADD_STA command to send to device */
 448         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 449         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 450         station->sta.mode = 0;
 451         station->sta.sta.sta_id = index;
 452         station->sta.station_flags = 0;
 453
 454         if (priv->band == IEEE80211_BAND_5GHZ)
 455                 rate = IWL_RATE_6M_PLCP;
 456         else
 457                 rate =  IWL_RATE_1M_PLCP;
 458
 459         /* Turn on both antennas for the station... */
 460         station->sta.rate_n_flags =
 461                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 462         station->current_rate.rate_n_flags =
 463                         le16_to_cpu(station->sta.rate_n_flags);
 464
 465         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 466
 467         /* Add station to device's station table */
 468         iwl3945_send_add_station(priv, &station->sta, flags);
 469         return index;
 470
 471 }
 472
 473 /*************** DRIVER STATUS FUNCTIONS   *****/
 474
 475 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 476 {
 477         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 478          * set but EXIT_PENDING is not */
 479         return test_bit(STATUS_READY, &priv->status) &&
 480                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 481                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 482 }
 483
 484 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 485 {
 486         return test_bit(STATUS_ALIVE, &priv->status);
 487 }
 488
 489 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 490 {
 491         return test_bit(STATUS_INIT, &priv->status);
 492 }
 493
 494 static inline int iwl3945_is_rfkill_sw(struct iwl3945_priv *priv)
 495 {
 496         return test_bit(STATUS_RF_KILL_SW, &priv->status);
 497 }
 498
 499 static inline int iwl3945_is_rfkill_hw(struct iwl3945_priv *priv)
 500 {
 501         return test_bit(STATUS_RF_KILL_HW, &priv->status);
 502 }
 503
 504 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 505 {
 506         return iwl3945_is_rfkill_hw(priv) ||
 507                 iwl3945_is_rfkill_sw(priv);
 508 }
 509
 510 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 511 {
 512
 513         if (iwl3945_is_rfkill(priv))
 514                 return 0;
 515
 516         return iwl3945_is_ready(priv);
 517 }
 518
 519 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 520
 521 #define IWL_CMD(x) case x: return #x
 522
 523 static const char *get_cmd_string(u8 cmd)
 524 {
 525         switch (cmd) {
 526                 IWL_CMD(REPLY_ALIVE);
 527                 IWL_CMD(REPLY_ERROR);
 528                 IWL_CMD(REPLY_RXON);
 529                 IWL_CMD(REPLY_RXON_ASSOC);
 530                 IWL_CMD(REPLY_QOS_PARAM);
 531                 IWL_CMD(REPLY_RXON_TIMING);
 532                 IWL_CMD(REPLY_ADD_STA);
 533                 IWL_CMD(REPLY_REMOVE_STA);
 534                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 535                 IWL_CMD(REPLY_3945_RX);
 536                 IWL_CMD(REPLY_TX);
 537                 IWL_CMD(REPLY_RATE_SCALE);
 538                 IWL_CMD(REPLY_LEDS_CMD);
 539                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 540                 IWL_CMD(RADAR_NOTIFICATION);
 541                 IWL_CMD(REPLY_QUIET_CMD);
 542                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 543                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 544                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 545                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 546                 IWL_CMD(POWER_TABLE_CMD);
 547                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 548                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 549                 IWL_CMD(REPLY_SCAN_CMD);
 550                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 551                 IWL_CMD(SCAN_START_NOTIFICATION);
 552                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 553                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 554                 IWL_CMD(BEACON_NOTIFICATION);
 555                 IWL_CMD(REPLY_TX_BEACON);
 556                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 557                 IWL_CMD(QUIET_NOTIFICATION);
 558                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 559                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 560                 IWL_CMD(REPLY_BT_CONFIG);
 561                 IWL_CMD(REPLY_STATISTICS_CMD);
 562                 IWL_CMD(STATISTICS_NOTIFICATION);
 563                 IWL_CMD(REPLY_CARD_STATE_CMD);
 564                 IWL_CMD(CARD_STATE_NOTIFICATION);
 565                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 566         default:
 567                 return "UNKNOWN";
 568
 569         }
 570 }
 571
 572 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 573
 574 /**
 575  * iwl3945_enqueue_hcmd - enqueue a uCode command
 576  * @priv: device private data point
 577  * @cmd: a point to the ucode command structure
 578  *
 579  * The function returns < 0 values to indicate the operation is
 580  * failed. On success, it turns the index (> 0) of command in the
 581  * command queue.
 582  */
 583 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 584 {
 585         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 586         struct iwl3945_queue *q = &txq->q;
 587         struct iwl3945_tfd_frame *tfd;
 588         u32 *control_flags;
 589         struct iwl3945_cmd *out_cmd;
 590         u32 idx;
 591         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 592         dma_addr_t phys_addr;
 593         int pad;
 594         u16 count;
 595         int ret;
 596         unsigned long flags;
 597
 598         /* If any of the command structures end up being larger than
 599          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 600          * we will need to increase the size of the TFD entries */
 601         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 602                !(cmd->meta.flags & CMD_SIZE_HUGE));
 603
 604
 605         if (iwl3945_is_rfkill(priv)) {
 606                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 607                 return -EIO;
 608         }
 609
 610         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 611                 IWL_ERROR("No space for Tx\n");
 612                 return -ENOSPC;
 613         }
 614
 615         spin_lock_irqsave(&priv->hcmd_lock, flags);
 616
 617         tfd = &txq->bd[q->write_ptr];
 618         memset(tfd, 0, sizeof(*tfd));
 619
 620         control_flags = (u32 *) tfd;
 621
 622         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 623         out_cmd = &txq->cmd[idx];
 624
 625         out_cmd->hdr.cmd = cmd->id;
 626         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 627         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 628
 629         /* At this point, the out_cmd now has all of the incoming cmd
 630          * information */
 631
 632         out_cmd->hdr.flags = 0;
 633         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 634                         INDEX_TO_SEQ(q->write_ptr));
 635         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 636                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 637
 638         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 639                         offsetof(struct iwl3945_cmd, hdr);
 640         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 641
 642         pad = U32_PAD(cmd->len);
 643         count = TFD_CTL_COUNT_GET(*control_flags);
 644         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 645
 646         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 647                      "%d bytes at %d[%d]:%d\n",
 648                      get_cmd_string(out_cmd->hdr.cmd),
 649                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 650                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 651
 652         txq->need_update = 1;
 653
 654         /* Increment and update queue's write index */
 655         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 656         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 657
 658         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 659         return ret ? ret : idx;
 660 }
 661
 662 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 663 {
 664         int ret;
 665
 666         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 667
 668         /* An asynchronous command can not expect an SKB to be set. */
 669         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 670
 671         /* An asynchronous command MUST have a callback. */
 672         BUG_ON(!cmd->meta.u.callback);
 673
 674         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 675                 return -EBUSY;
 676
 677         ret = iwl3945_enqueue_hcmd(priv, cmd);
 678         if (ret < 0) {
 679                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 680                           get_cmd_string(cmd->id), ret);
 681                 return ret;
 682         }
 683         return 0;
 684 }
 685
 686 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 687 {
 688         int cmd_idx;
 689         int ret;
 690
 691         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 692
 693          /* A synchronous command can not have a callback set. */
 694         BUG_ON(cmd->meta.u.callback != NULL);
 695
 696         if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
 697                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 698                           get_cmd_string(cmd->id));
 699                 ret = -EBUSY;
 700                 goto out;
 701         }
 702
 703         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 704
 705         if (cmd->meta.flags & CMD_WANT_SKB)
 706                 cmd->meta.source = &cmd->meta;
 707
 708         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 709         if (cmd_idx < 0) {
 710                 ret = cmd_idx;
 711                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 712                           get_cmd_string(cmd->id), ret);
 713                 goto out;
 714         }
 715
 716         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 717                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 718                         HOST_COMPLETE_TIMEOUT);
 719         if (!ret) {
 720                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 721                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 722                                   get_cmd_string(cmd->id),
 723                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 724
 725                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 726                         ret = -ETIMEDOUT;
 727                         goto cancel;
 728                 }
 729         }
 730
 731         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 732                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 733                                get_cmd_string(cmd->id));
 734                 ret = -ECANCELED;
 735                 goto fail;
 736         }
 737         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 738                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 739                                get_cmd_string(cmd->id));
 740                 ret = -EIO;
 741                 goto fail;
 742         }
 743         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 744                 IWL_ERROR("Error: Response NULL in '%s'\n",
 745                           get_cmd_string(cmd->id));
 746                 ret = -EIO;
 747                 goto out;
 748         }
 749
 750         ret = 0;
 751         goto out;
 752
 753 cancel:
 754         if (cmd->meta.flags & CMD_WANT_SKB) {
 755                 struct iwl3945_cmd *qcmd;
 756
 757                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 758                  * TX cmd queue. Otherwise in case the cmd comes
 759                  * in later, it will possibly set an invalid
 760                  * address (cmd->meta.source). */
 761                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 762                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 763         }
 764 fail:
 765         if (cmd->meta.u.skb) {
 766                 dev_kfree_skb_any(cmd->meta.u.skb);
 767                 cmd->meta.u.skb = NULL;
 768         }
 769 out:
 770         clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
 771         return ret;
 772 }
 773
 774 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 775 {
 776         if (cmd->meta.flags & CMD_ASYNC)
 777                 return iwl3945_send_cmd_async(priv, cmd);
 778
 779         return iwl3945_send_cmd_sync(priv, cmd);
 780 }
 781
 782 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 783 {
 784         struct iwl3945_host_cmd cmd = {
 785                 .id = id,
 786                 .len = len,
 787                 .data = data,
 788         };
 789
 790         return iwl3945_send_cmd_sync(priv, &cmd);
 791 }
 792
 793 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 794 {
 795         struct iwl3945_host_cmd cmd = {
 796                 .id = id,
 797                 .len = sizeof(val),
 798                 .data = &val,
 799         };
 800
 801         return iwl3945_send_cmd_sync(priv, &cmd);
 802 }
 803
 804 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 805 {
 806         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 807 }
 808
 809 /**
 810  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 811  * @band: 2.4 or 5 GHz band
 812  * @channel: Any channel valid for the requested band
 813
 814  * In addition to setting the staging RXON, priv->band is also set.
 815  *
 816  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 817  * in the staging RXON flag structure based on the band
 818  */
 819 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 820                                     enum ieee80211_band band,
 821                                     u16 channel)
 822 {
 823         if (!iwl3945_get_channel_info(priv, band, channel)) {
 824                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 825                                channel, band);
 826                 return -EINVAL;
 827         }
 828
 829         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 830             (priv->band == band))
 831                 return 0;
 832
 833         priv->staging_rxon.channel = cpu_to_le16(channel);
 834         if (band == IEEE80211_BAND_5GHZ)
 835                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 836         else
 837                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 838
 839         priv->band = band;
 840
 841         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 842
 843         return 0;
 844 }
 845
 846 /**
 847  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 848  *
 849  * NOTE:  This is really only useful during development and can eventually
 850  * be #ifdef'd out once the driver is stable and folks aren't actively
 851  * making changes
 852  */
 853 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 854 {
 855         int error = 0;
 856         int counter = 1;
 857
 858         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 859                 error |= le32_to_cpu(rxon->flags &
 860                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 861                                  RXON_FLG_RADAR_DETECT_MSK));
 862                 if (error)
 863                         IWL_WARNING("check 24G fields %d | %d\n",
 864                                     counter++, error);
 865         } else {
 866                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 867                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 868                 if (error)
 869                         IWL_WARNING("check 52 fields %d | %d\n",
 870                                     counter++, error);
 871                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 872                 if (error)
 873                         IWL_WARNING("check 52 CCK %d | %d\n",
 874                                     counter++, error);
 875         }
 876         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 877         if (error)
 878                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 879
 880         /* make sure basic rates 6Mbps and 1Mbps are supported */
 881         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 882                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 883         if (error)
 884                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 885
 886         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 887         if (error)
 888                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 889
 890         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 891                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 892         if (error)
 893                 IWL_WARNING("check CCK and short slot %d | %d\n",
 894                             counter++, error);
 895
 896         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 897                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 898         if (error)
 899                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 900                             counter++, error);
 901
 902         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 903                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 904         if (error)
 905                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 906                             counter++, error);
 907
 908         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 909                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 910                                 RXON_FLG_ANT_A_MSK)) == 0);
 911         if (error)
 912                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 913
 914         if (error)
 915                 IWL_WARNING("Tuning to channel %d\n",
 916                             le16_to_cpu(rxon->channel));
 917
 918         if (error) {
 919                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 920                 return -1;
 921         }
 922         return 0;
 923 }
 924
 925 /**
 926  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 927  * @priv: staging_rxon is compared to active_rxon
 928  *
 929  * If the RXON structure is changing enough to require a new tune,
 930  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 931  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 932  */
 933 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
 934 {
 935
 936         /* These items are only settable from the full RXON command */
 937         if (!(iwl3945_is_associated(priv)) ||
 938             compare_ether_addr(priv->staging_rxon.bssid_addr,
 939                                priv->active_rxon.bssid_addr) ||
 940             compare_ether_addr(priv->staging_rxon.node_addr,
 941                                priv->active_rxon.node_addr) ||
 942             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 943                                priv->active_rxon.wlap_bssid_addr) ||
 944             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 945             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 946             (priv->staging_rxon.air_propagation !=
 947              priv->active_rxon.air_propagation) ||
 948             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 949                 return 1;
 950
 951         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 952          * be updated with the RXON_ASSOC command -- however only some
 953          * flag transitions are allowed using RXON_ASSOC */
 954
 955         /* Check if we are not switching bands */
 956         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 957             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 958                 return 1;
 959
 960         /* Check if we are switching association toggle */
 961         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 962                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 963                 return 1;
 964
 965         return 0;
 966 }
 967
 968 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
 969 {
 970         int rc = 0;
 971         struct iwl3945_rx_packet *res = NULL;
 972         struct iwl3945_rxon_assoc_cmd rxon_assoc;
 973         struct iwl3945_host_cmd cmd = {
 974                 .id = REPLY_RXON_ASSOC,
 975                 .len = sizeof(rxon_assoc),
 976                 .meta.flags = CMD_WANT_SKB,
 977                 .data = &rxon_assoc,
 978         };
 979         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
 980         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
 981
 982         if ((rxon1->flags == rxon2->flags) &&
 983             (rxon1->filter_flags == rxon2->filter_flags) &&
 984             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 985             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 986                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
 987                 return 0;
 988         }
 989
 990         rxon_assoc.flags = priv->staging_rxon.flags;
 991         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
 992         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
 993         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
 994         rxon_assoc.reserved = 0;
 995
 996         rc = iwl3945_send_cmd_sync(priv, &cmd);
 997         if (rc)
 998                 return rc;
 999
1000         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1001         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1002                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1003                 rc = -EIO;
1004         }
1005
1006         priv->alloc_rxb_skb--;
1007         dev_kfree_skb_any(cmd.meta.u.skb);
1008
1009         return rc;
1010 }
1011
1012 /**
1013  * iwl3945_commit_rxon - commit staging_rxon to hardware
1014  *
1015  * The RXON command in staging_rxon is committed to the hardware and
1016  * the active_rxon structure is updated with the new data.  This
1017  * function correctly transitions out of the RXON_ASSOC_MSK state if
1018  * a HW tune is required based on the RXON structure changes.
1019  */
1020 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1021 {
1022         /* cast away the const for active_rxon in this function */
1023         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1024         int rc = 0;
1025
1026         if (!iwl3945_is_alive(priv))
1027                 return -1;
1028
1029         /* always get timestamp with Rx frame */
1030         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1031
1032         /* select antenna */
1033         priv->staging_rxon.flags &=
1034             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1035         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1036
1037         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1038         if (rc) {
1039                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1040                 return -EINVAL;
1041         }
1042
1043         /* If we don't need to send a full RXON, we can use
1044          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1045          * and other flags for the current radio configuration. */
1046         if (!iwl3945_full_rxon_required(priv)) {
1047                 rc = iwl3945_send_rxon_assoc(priv);
1048                 if (rc) {
1049                         IWL_ERROR("Error setting RXON_ASSOC "
1050                                   "configuration (%d).\n", rc);
1051                         return rc;
1052                 }
1053
1054                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1055
1056                 return 0;
1057         }
1058
1059         /* If we are currently associated and the new config requires
1060          * an RXON_ASSOC and the new config wants the associated mask enabled,
1061          * we must clear the associated from the active configuration
1062          * before we apply the new config */
1063         if (iwl3945_is_associated(priv) &&
1064             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1065                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1066                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1067
1068                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1069                                       sizeof(struct iwl3945_rxon_cmd),
1070                                       &priv->active_rxon);
1071
1072                 /* If the mask clearing failed then we set
1073                  * active_rxon back to what it was previously */
1074                 if (rc) {
1075                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1076                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1077                                   "configuration (%d).\n", rc);
1078                         return rc;
1079                 }
1080         }
1081
1082         IWL_DEBUG_INFO("Sending RXON\n"
1083                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1084                        "* channel = %d\n"
1085                        "* bssid = %pM\n",
1086                        ((priv->staging_rxon.filter_flags &
1087                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1088                        le16_to_cpu(priv->staging_rxon.channel),
1089                        priv->staging_rxon.bssid_addr);
1090
1091         /* Apply the new configuration */
1092         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1093                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1094         if (rc) {
1095                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1096                 return rc;
1097         }
1098
1099         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1100
1101         iwl3945_clear_stations_table(priv);
1102
1103         /* If we issue a new RXON command which required a tune then we must
1104          * send a new TXPOWER command or we won't be able to Tx any frames */
1105         rc = iwl3945_hw_reg_send_txpower(priv);
1106         if (rc) {
1107                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1108                 return rc;
1109         }
1110
1111         /* Add the broadcast address so we can send broadcast frames */
1112         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1113             IWL_INVALID_STATION) {
1114                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1115                 return -EIO;
1116         }
1117
1118         /* If we have set the ASSOC_MSK and we are in BSS mode then
1119          * add the IWL_AP_ID to the station rate table */
1120         if (iwl3945_is_associated(priv) &&
1121             (priv->iw_mode == NL80211_IFTYPE_STATION))
1122                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1123                     == IWL_INVALID_STATION) {
1124                         IWL_ERROR("Error adding AP address for transmit.\n");
1125                         return -EIO;
1126                 }
1127
1128         /* Init the hardware's rate fallback order based on the band */
1129         rc = iwl3945_init_hw_rate_table(priv);
1130         if (rc) {
1131                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1132                 return -EIO;
1133         }
1134
1135         return 0;
1136 }
1137
1138 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1139 {
1140         struct iwl3945_bt_cmd bt_cmd = {
1141                 .flags = 3,
1142                 .lead_time = 0xAA,
1143                 .max_kill = 1,
1144                 .kill_ack_mask = 0,
1145                 .kill_cts_mask = 0,
1146         };
1147
1148         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1149                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1150 }
1151
1152 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1153 {
1154         int rc = 0;
1155         struct iwl3945_rx_packet *res;
1156         struct iwl3945_host_cmd cmd = {
1157                 .id = REPLY_SCAN_ABORT_CMD,
1158                 .meta.flags = CMD_WANT_SKB,
1159         };
1160
1161         /* If there isn't a scan actively going on in the hardware
1162          * then we are in between scan bands and not actually
1163          * actively scanning, so don't send the abort command */
1164         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1165                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1166                 return 0;
1167         }
1168
1169         rc = iwl3945_send_cmd_sync(priv, &cmd);
1170         if (rc) {
1171                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1172                 return rc;
1173         }
1174
1175         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1176         if (res->u.status != CAN_ABORT_STATUS) {
1177                 /* The scan abort will return 1 for success or
1178                  * 2 for "failure".  A failure condition can be
1179                  * due to simply not being in an active scan which
1180                  * can occur if we send the scan abort before we
1181                  * the microcode has notified us that a scan is
1182                  * completed. */
1183                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1184                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1185                 clear_bit(STATUS_SCAN_HW, &priv->status);
1186         }
1187
1188         dev_kfree_skb_any(cmd.meta.u.skb);
1189
1190         return rc;
1191 }
1192
1193 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1194                                         struct iwl3945_cmd *cmd,
1195                                         struct sk_buff *skb)
1196 {
1197         return 1;
1198 }
1199
1200 /*
1201  * CARD_STATE_CMD
1202  *
1203  * Use: Sets the device's internal card state to enable, disable, or halt
1204  *
1205  * When in the 'enable' state the card operates as normal.
1206  * When in the 'disable' state, the card enters into a low power mode.
1207  * When in the 'halt' state, the card is shut down and must be fully
1208  * restarted to come back on.
1209  */
1210 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1211 {
1212         struct iwl3945_host_cmd cmd = {
1213                 .id = REPLY_CARD_STATE_CMD,
1214                 .len = sizeof(u32),
1215                 .data = &flags,
1216                 .meta.flags = meta_flag,
1217         };
1218
1219         if (meta_flag & CMD_ASYNC)
1220                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1221
1222         return iwl3945_send_cmd(priv, &cmd);
1223 }
1224
1225 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1226                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1227 {
1228         struct iwl3945_rx_packet *res = NULL;
1229
1230         if (!skb) {
1231                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1232                 return 1;
1233         }
1234
1235         res = (struct iwl3945_rx_packet *)skb->data;
1236         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1237                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1238                           res->hdr.flags);
1239                 return 1;
1240         }
1241
1242         switch (res->u.add_sta.status) {
1243         case ADD_STA_SUCCESS_MSK:
1244                 break;
1245         default:
1246                 break;
1247         }
1248
1249         /* We didn't cache the SKB; let the caller free it */
1250         return 1;
1251 }
1252
1253 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1254                          struct iwl3945_addsta_cmd *sta, u8 flags)
1255 {
1256         struct iwl3945_rx_packet *res = NULL;
1257         int rc = 0;
1258         struct iwl3945_host_cmd cmd = {
1259                 .id = REPLY_ADD_STA,
1260                 .len = sizeof(struct iwl3945_addsta_cmd),
1261                 .meta.flags = flags,
1262                 .data = sta,
1263         };
1264
1265         if (flags & CMD_ASYNC)
1266                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1267         else
1268                 cmd.meta.flags |= CMD_WANT_SKB;
1269
1270         rc = iwl3945_send_cmd(priv, &cmd);
1271
1272         if (rc || (flags & CMD_ASYNC))
1273                 return rc;
1274
1275         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1276         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1277                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1278                           res->hdr.flags);
1279                 rc = -EIO;
1280         }
1281
1282         if (rc == 0) {
1283                 switch (res->u.add_sta.status) {
1284                 case ADD_STA_SUCCESS_MSK:
1285                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1286                         break;
1287                 default:
1288                         rc = -EIO;
1289                         IWL_WARNING("REPLY_ADD_STA failed\n");
1290                         break;
1291                 }
1292         }
1293
1294         priv->alloc_rxb_skb--;
1295         dev_kfree_skb_any(cmd.meta.u.skb);
1296
1297         return rc;
1298 }
1299
1300 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1301                                    struct ieee80211_key_conf *keyconf,
1302                                    u8 sta_id)
1303 {
1304         unsigned long flags;
1305         __le16 key_flags = 0;
1306
1307         switch (keyconf->alg) {
1308         case ALG_CCMP:
1309                 key_flags |= STA_KEY_FLG_CCMP;
1310                 key_flags |= cpu_to_le16(
1311                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1312                 key_flags &= ~STA_KEY_FLG_INVALID;
1313                 break;
1314         case ALG_TKIP:
1315         case ALG_WEP:
1316         default:
1317                 return -EINVAL;
1318         }
1319         spin_lock_irqsave(&priv->sta_lock, flags);
1320         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1321         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1322         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1323                keyconf->keylen);
1324
1325         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1326                keyconf->keylen);
1327         priv->stations[sta_id].sta.key.key_flags = key_flags;
1328         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1329         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1330
1331         spin_unlock_irqrestore(&priv->sta_lock, flags);
1332
1333         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1334         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1335         return 0;
1336 }
1337
1338 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1339 {
1340         unsigned long flags;
1341
1342         spin_lock_irqsave(&priv->sta_lock, flags);
1343         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1344         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1345         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1346         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1347         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1348         spin_unlock_irqrestore(&priv->sta_lock, flags);
1349
1350         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1351         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1352         return 0;
1353 }
1354
1355 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1356 {
1357         struct list_head *element;
1358
1359         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1360                        priv->frames_count);
1361
1362         while (!list_empty(&priv->free_frames)) {
1363                 element = priv->free_frames.next;
1364                 list_del(element);
1365                 kfree(list_entry(element, struct iwl3945_frame, list));
1366                 priv->frames_count--;
1367         }
1368
1369         if (priv->frames_count) {
1370                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1371                             priv->frames_count);
1372                 priv->frames_count = 0;
1373         }
1374 }
1375
1376 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1377 {
1378         struct iwl3945_frame *frame;
1379         struct list_head *element;
1380         if (list_empty(&priv->free_frames)) {
1381                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1382                 if (!frame) {
1383                         IWL_ERROR("Could not allocate frame!\n");
1384                         return NULL;
1385                 }
1386
1387                 priv->frames_count++;
1388                 return frame;
1389         }
1390
1391         element = priv->free_frames.next;
1392         list_del(element);
1393         return list_entry(element, struct iwl3945_frame, list);
1394 }
1395
1396 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1397 {
1398         memset(frame, 0, sizeof(*frame));
1399         list_add(&frame->list, &priv->free_frames);
1400 }
1401
1402 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1403                                 struct ieee80211_hdr *hdr,
1404                                 const u8 *dest, int left)
1405 {
1406
1407         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1408             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
1409              (priv->iw_mode != NL80211_IFTYPE_AP)))
1410                 return 0;
1411
1412         if (priv->ibss_beacon->len > left)
1413                 return 0;
1414
1415         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1416
1417         return priv->ibss_beacon->len;
1418 }
1419
1420 static u8 iwl3945_rate_get_lowest_plcp(struct iwl3945_priv *priv)
1421 {
1422         u8 i;
1423         int rate_mask;
1424
1425         /* Set rate mask*/
1426         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1427                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
1428         else
1429                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
1430
1431         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1432              i = iwl3945_rates[i].next_ieee) {
1433                 if (rate_mask & (1 << i))
1434                         return iwl3945_rates[i].plcp;
1435         }
1436
1437         /* No valid rate was found. Assign the lowest one */
1438         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1439                 return IWL_RATE_1M_PLCP;
1440         else
1441                 return IWL_RATE_6M_PLCP;
1442 }
1443
1444 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1445 {
1446         struct iwl3945_frame *frame;
1447         unsigned int frame_size;
1448         int rc;
1449         u8 rate;
1450
1451         frame = iwl3945_get_free_frame(priv);
1452
1453         if (!frame) {
1454                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1455                           "command.\n");
1456                 return -ENOMEM;
1457         }
1458
1459         rate = iwl3945_rate_get_lowest_plcp(priv);
1460
1461         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1462
1463         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1464                               &frame->u.cmd[0]);
1465
1466         iwl3945_free_frame(priv, frame);
1467
1468         return rc;
1469 }
1470
1471 /******************************************************************************
1472  *
1473  * EEPROM related functions
1474  *
1475  ******************************************************************************/
1476
1477 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1478 {
1479         memcpy(mac, priv->eeprom.mac_address, 6);
1480 }
1481
1482 /*
1483  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1484  * embedded controller) as EEPROM reader; each read is a series of pulses
1485  * to/from the EEPROM chip, not a single event, so even reads could conflict
1486  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1487  * simply claims ownership, which should be safe when this function is called
1488  * (i.e. before loading uCode!).
1489  */
1490 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1491 {
1492         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1493         return 0;
1494 }
1495
1496 /**
1497  * iwl3945_eeprom_init - read EEPROM contents
1498  *
1499  * Load the EEPROM contents from adapter into priv->eeprom
1500  *
1501  * NOTE:  This routine uses the non-debug IO access functions.
1502  */
1503 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1504 {
1505         u16 *e = (u16 *)&priv->eeprom;
1506         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1507         u32 r;
1508         int sz = sizeof(priv->eeprom);
1509         int rc;
1510         int i;
1511         u16 addr;
1512
1513         /* The EEPROM structure has several padding buffers within it
1514          * and when adding new EEPROM maps is subject to programmer errors
1515          * which may be very difficult to identify without explicitly
1516          * checking the resulting size of the eeprom map. */
1517         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1518
1519         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1520                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
1521                 return -ENOENT;
1522         }
1523
1524         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1525         rc = iwl3945_eeprom_acquire_semaphore(priv);
1526         if (rc < 0) {
1527                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1528                 return -ENOENT;
1529         }
1530
1531         /* eeprom is an array of 16bit values */
1532         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1533                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1534                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1535
1536                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1537                                         i += IWL_EEPROM_ACCESS_DELAY) {
1538                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1539                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1540                                 break;
1541                         udelay(IWL_EEPROM_ACCESS_DELAY);
1542                 }
1543
1544                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1545                         IWL_ERROR("Time out reading EEPROM[%d]\n", addr);
1546                         return -ETIMEDOUT;
1547                 }
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 iwl3945_qosparam_cmd *qos)
1677 {
1678
1679         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1680                                 sizeof(struct iwl3945_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 #define NOSLP __constant_cpu_to_le32(0)
1810 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
1811 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1812 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1813                                      __constant_cpu_to_le32(X1), \
1814                                      __constant_cpu_to_le32(X2), \
1815                                      __constant_cpu_to_le32(X3), \
1816                                      __constant_cpu_to_le32(X4)}
1817
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 iwl3945_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 iwl3945_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 iwl3945_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         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1971
1972         if (final_mode == IWL_POWER_MODE_CAM)
1973                 clear_bit(STATUS_POWER_PMI, &priv->status);
1974         else
1975                 set_bit(STATUS_POWER_PMI, &priv->status);
1976
1977         return rc;
1978 }
1979
1980 /**
1981  * iwl3945_scan_cancel - Cancel any currently executing HW scan
1982  *
1983  * NOTE: priv->mutex is not required before calling this function
1984  */
1985 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
1986 {
1987         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1988                 clear_bit(STATUS_SCANNING, &priv->status);
1989                 return 0;
1990         }
1991
1992         if (test_bit(STATUS_SCANNING, &priv->status)) {
1993                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1994                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1995                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1996                         queue_work(priv->workqueue, &priv->abort_scan);
1997
1998                 } else
1999                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2000
2001                 return test_bit(STATUS_SCANNING, &priv->status);
2002         }
2003
2004         return 0;
2005 }
2006
2007 /**
2008  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2009  * @ms: amount of time to wait (in milliseconds) for scan to abort
2010  *
2011  * NOTE: priv->mutex must be held before calling this function
2012  */
2013 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2014 {
2015         unsigned long now = jiffies;
2016         int ret;
2017
2018         ret = iwl3945_scan_cancel(priv);
2019         if (ret && ms) {
2020                 mutex_unlock(&priv->mutex);
2021                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2022                                 test_bit(STATUS_SCANNING, &priv->status))
2023                         msleep(1);
2024                 mutex_lock(&priv->mutex);
2025
2026                 return test_bit(STATUS_SCANNING, &priv->status);
2027         }
2028
2029         return ret;
2030 }
2031
2032 #define MAX_UCODE_BEACON_INTERVAL       1024
2033 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2034
2035 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2036 {
2037         u16 new_val = 0;
2038         u16 beacon_factor = 0;
2039
2040         beacon_factor =
2041             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2042                 / MAX_UCODE_BEACON_INTERVAL;
2043         new_val = beacon_val / beacon_factor;
2044
2045         return cpu_to_le16(new_val);
2046 }
2047
2048 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2049 {
2050         u64 interval_tm_unit;
2051         u64 tsf, result;
2052         unsigned long flags;
2053         struct ieee80211_conf *conf = NULL;
2054         u16 beacon_int = 0;
2055
2056         conf = ieee80211_get_hw_conf(priv->hw);
2057
2058         spin_lock_irqsave(&priv->lock, flags);
2059         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2060         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2061
2062         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2063
2064         tsf = priv->timestamp1;
2065         tsf = ((tsf << 32) | priv->timestamp0);
2066
2067         beacon_int = priv->beacon_int;
2068         spin_unlock_irqrestore(&priv->lock, flags);
2069
2070         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
2071                 if (beacon_int == 0) {
2072                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2073                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2074                 } else {
2075                         priv->rxon_timing.beacon_interval =
2076                                 cpu_to_le16(beacon_int);
2077                         priv->rxon_timing.beacon_interval =
2078                             iwl3945_adjust_beacon_interval(
2079                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2080                 }
2081
2082                 priv->rxon_timing.atim_window = 0;
2083         } else {
2084                 priv->rxon_timing.beacon_interval =
2085                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2086                 /* TODO: we need to get atim_window from upper stack
2087                  * for now we set to 0 */
2088                 priv->rxon_timing.atim_window = 0;
2089         }
2090
2091         interval_tm_unit =
2092                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2093         result = do_div(tsf, interval_tm_unit);
2094         priv->rxon_timing.beacon_init_val =
2095             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2096
2097         IWL_DEBUG_ASSOC
2098             ("beacon interval %d beacon timer %d beacon tim %d\n",
2099                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2100                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2101                 le16_to_cpu(priv->rxon_timing.atim_window));
2102 }
2103
2104 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2105 {
2106         if (!iwl3945_is_ready_rf(priv)) {
2107                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2108                 return -EIO;
2109         }
2110
2111         if (test_bit(STATUS_SCANNING, &priv->status)) {
2112                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2113                 return -EAGAIN;
2114         }
2115
2116         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2117                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2118                                "Queuing.\n");
2119                 return -EAGAIN;
2120         }
2121
2122         IWL_DEBUG_INFO("Starting scan...\n");
2123         if (priv->cfg->sku & IWL_SKU_G)
2124                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
2125         if (priv->cfg->sku & IWL_SKU_A)
2126                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
2127         set_bit(STATUS_SCANNING, &priv->status);
2128         priv->scan_start = jiffies;
2129         priv->scan_pass_start = priv->scan_start;
2130
2131         queue_work(priv->workqueue, &priv->request_scan);
2132
2133         return 0;
2134 }
2135
2136 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2137 {
2138         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2139
2140         if (hw_decrypt)
2141                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2142         else
2143                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2144
2145         return 0;
2146 }
2147
2148 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2149                                           enum ieee80211_band band)
2150 {
2151         if (band == IEEE80211_BAND_5GHZ) {
2152                 priv->staging_rxon.flags &=
2153                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2154                       | RXON_FLG_CCK_MSK);
2155                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2156         } else {
2157                 /* Copied from iwl3945_bg_post_associate() */
2158                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2159                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2160                 else
2161                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2162
2163                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2164                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2165
2166                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2167                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2168                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2169         }
2170 }
2171
2172 /*
2173  * initialize rxon structure with default values from eeprom
2174  */
2175 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv,
2176                                               int mode)
2177 {
2178         const struct iwl3945_channel_info *ch_info;
2179
2180         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2181
2182         switch (mode) {
2183         case NL80211_IFTYPE_AP:
2184                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2185                 break;
2186
2187         case NL80211_IFTYPE_STATION:
2188                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2189                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2190                 break;
2191
2192         case NL80211_IFTYPE_ADHOC:
2193                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2194                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2195                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2196                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2197                 break;
2198
2199         case NL80211_IFTYPE_MONITOR:
2200                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2201                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2202                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2203                 break;
2204         default:
2205                 IWL_ERROR("Unsupported interface type %d\n", mode);
2206                 break;
2207         }
2208
2209 #if 0
2210         /* TODO:  Figure out when short_preamble would be set and cache from
2211          * that */
2212         if (!hw_to_local(priv->hw)->short_preamble)
2213                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2214         else
2215                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2216 #endif
2217
2218         ch_info = iwl3945_get_channel_info(priv, priv->band,
2219                                        le16_to_cpu(priv->active_rxon.channel));
2220
2221         if (!ch_info)
2222                 ch_info = &priv->channel_info[0];
2223
2224         /*
2225          * in some case A channels are all non IBSS
2226          * in this case force B/G channel
2227          */
2228         if ((mode == NL80211_IFTYPE_ADHOC) && !(is_channel_ibss(ch_info)))
2229                 ch_info = &priv->channel_info[0];
2230
2231         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2232         if (is_channel_a_band(ch_info))
2233                 priv->band = IEEE80211_BAND_5GHZ;
2234         else
2235                 priv->band = IEEE80211_BAND_2GHZ;
2236
2237         iwl3945_set_flags_for_phymode(priv, priv->band);
2238
2239         priv->staging_rxon.ofdm_basic_rates =
2240             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2241         priv->staging_rxon.cck_basic_rates =
2242             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2243 }
2244
2245 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2246 {
2247         if (mode == NL80211_IFTYPE_ADHOC) {
2248                 const struct iwl3945_channel_info *ch_info;
2249
2250                 ch_info = iwl3945_get_channel_info(priv,
2251                         priv->band,
2252                         le16_to_cpu(priv->staging_rxon.channel));
2253
2254                 if (!ch_info || !is_channel_ibss(ch_info)) {
2255                         IWL_ERROR("channel %d not IBSS channel\n",
2256                                   le16_to_cpu(priv->staging_rxon.channel));
2257                         return -EINVAL;
2258                 }
2259         }
2260
2261         iwl3945_connection_init_rx_config(priv, mode);
2262         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2263
2264         iwl3945_clear_stations_table(priv);
2265
2266         /* don't commit rxon if rf-kill is on*/
2267         if (!iwl3945_is_ready_rf(priv))
2268                 return -EAGAIN;
2269
2270         cancel_delayed_work(&priv->scan_check);
2271         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2272                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2273                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2274                 return -EAGAIN;
2275         }
2276
2277         iwl3945_commit_rxon(priv);
2278
2279         return 0;
2280 }
2281
2282 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2283                                       struct ieee80211_tx_info *info,
2284                                       struct iwl3945_cmd *cmd,
2285                                       struct sk_buff *skb_frag,
2286                                       int last_frag)
2287 {
2288         struct iwl3945_hw_key *keyinfo =
2289             &priv->stations[info->control.hw_key->hw_key_idx].keyinfo;
2290
2291         switch (keyinfo->alg) {
2292         case ALG_CCMP:
2293                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2294                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2295                 IWL_DEBUG_TX("tx_cmd with AES hwcrypto\n");
2296                 break;
2297
2298         case ALG_TKIP:
2299 #if 0
2300                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2301
2302                 if (last_frag)
2303                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2304                                8);
2305                 else
2306                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2307 #endif
2308                 break;
2309
2310         case ALG_WEP:
2311                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2312                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2313
2314                 if (keyinfo->keylen == 13)
2315                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2316
2317                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2318
2319                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2320                              "with key %d\n", info->control.hw_key->hw_key_idx);
2321                 break;
2322
2323         default:
2324                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2325                 break;
2326         }
2327 }
2328
2329 /*
2330  * handle build REPLY_TX command notification.
2331  */
2332 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2333                                   struct iwl3945_cmd *cmd,
2334                                   struct ieee80211_tx_info *info,
2335                                   struct ieee80211_hdr *hdr,
2336                                   int is_unicast, u8 std_id)
2337 {
2338         __le16 fc = hdr->frame_control;
2339         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2340         u8 rc_flags = info->control.rates[0].flags;
2341
2342         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2343         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
2344                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2345                 if (ieee80211_is_mgmt(fc))
2346                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2347                 if (ieee80211_is_probe_resp(fc) &&
2348                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2349                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2350         } else {
2351                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2352                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2353         }
2354
2355         cmd->cmd.tx.sta_id = std_id;
2356         if (ieee80211_has_morefrags(fc))
2357                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2358
2359         if (ieee80211_is_data_qos(fc)) {
2360                 u8 *qc = ieee80211_get_qos_ctl(hdr);
2361                 cmd->cmd.tx.tid_tspec = qc[0] & 0xf;
2362                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2363         } else {
2364                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2365         }
2366
2367         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2368                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2369                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2370         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
2371                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2372                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2373         }
2374
2375         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2376                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2377
2378         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2379         if (ieee80211_is_mgmt(fc)) {
2380                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
2381                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2382                 else
2383                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2384         } else {
2385                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2386 #ifdef CONFIG_IWL3945_LEDS
2387                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2388 #endif
2389         }
2390
2391         cmd->cmd.tx.driver_txop = 0;
2392         cmd->cmd.tx.tx_flags = tx_flags;
2393         cmd->cmd.tx.next_frame_len = 0;
2394 }
2395
2396 /**
2397  * iwl3945_get_sta_id - Find station's index within station table
2398  */
2399 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2400 {
2401         int sta_id;
2402         u16 fc = le16_to_cpu(hdr->frame_control);
2403
2404         /* If this frame is broadcast or management, use broadcast station id */
2405         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2406             is_multicast_ether_addr(hdr->addr1))
2407                 return priv->hw_setting.bcast_sta_id;
2408
2409         switch (priv->iw_mode) {
2410
2411         /* If we are a client station in a BSS network, use the special
2412          * AP station entry (that's the only station we communicate with) */
2413         case NL80211_IFTYPE_STATION:
2414                 return IWL_AP_ID;
2415
2416         /* If we are an AP, then find the station, or use BCAST */
2417         case NL80211_IFTYPE_AP:
2418                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2419                 if (sta_id != IWL_INVALID_STATION)
2420                         return sta_id;
2421                 return priv->hw_setting.bcast_sta_id;
2422
2423         /* If this frame is going out to an IBSS network, find the station,
2424          * or create a new station table entry */
2425         case NL80211_IFTYPE_ADHOC: {
2426                 /* Create new station table entry */
2427                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2428                 if (sta_id != IWL_INVALID_STATION)
2429                         return sta_id;
2430
2431                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2432
2433                 if (sta_id != IWL_INVALID_STATION)
2434                         return sta_id;
2435
2436                 IWL_DEBUG_DROP("Station %pM not in station map. "
2437                                "Defaulting to broadcast...\n",
2438                                hdr->addr1);
2439                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2440                 return priv->hw_setting.bcast_sta_id;
2441         }
2442         /* If we are in monitor mode, use BCAST. This is required for
2443          * packet injection. */
2444         case NL80211_IFTYPE_MONITOR:
2445                 return priv->hw_setting.bcast_sta_id;
2446
2447         default:
2448                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
2449                 return priv->hw_setting.bcast_sta_id;
2450         }
2451 }
2452
2453 /*
2454  * start REPLY_TX command process
2455  */
2456 static int iwl3945_tx_skb(struct iwl3945_priv *priv, struct sk_buff *skb)
2457 {
2458         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2459         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2460         struct iwl3945_tfd_frame *tfd;
2461         u32 *control_flags;
2462         int txq_id = skb_get_queue_mapping(skb);
2463         struct iwl3945_tx_queue *txq = NULL;
2464         struct iwl3945_queue *q = NULL;
2465         dma_addr_t phys_addr;
2466         dma_addr_t txcmd_phys;
2467         struct iwl3945_cmd *out_cmd = NULL;
2468         u16 len, idx, len_org, hdr_len;
2469         u8 id;
2470         u8 unicast;
2471         u8 sta_id;
2472         u8 tid = 0;
2473         u16 seq_number = 0;
2474         __le16 fc;
2475         u8 wait_write_ptr = 0;
2476         u8 *qc = NULL;
2477         unsigned long flags;
2478         int rc;
2479
2480         spin_lock_irqsave(&priv->lock, flags);
2481         if (iwl3945_is_rfkill(priv)) {
2482                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2483                 goto drop_unlock;
2484         }
2485
2486         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
2487                 IWL_ERROR("ERROR: No TX rate available.\n");
2488                 goto drop_unlock;
2489         }
2490
2491         unicast = !is_multicast_ether_addr(hdr->addr1);
2492         id = 0;
2493
2494         fc = hdr->frame_control;
2495
2496 #ifdef CONFIG_IWL3945_DEBUG
2497         if (ieee80211_is_auth(fc))
2498                 IWL_DEBUG_TX("Sending AUTH frame\n");
2499         else if (ieee80211_is_assoc_req(fc))
2500                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2501         else if (ieee80211_is_reassoc_req(fc))
2502                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2503 #endif
2504
2505         /* drop all data frame if we are not associated */
2506         if (ieee80211_is_data(fc) &&
2507             (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */
2508             (!iwl3945_is_associated(priv) ||
2509              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
2510                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2511                 goto drop_unlock;
2512         }
2513
2514         spin_unlock_irqrestore(&priv->lock, flags);
2515
2516         hdr_len = ieee80211_hdrlen(fc);
2517
2518         /* Find (or create) index into station table for destination station */
2519         sta_id = iwl3945_get_sta_id(priv, hdr);
2520         if (sta_id == IWL_INVALID_STATION) {
2521                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %pM\n",
2522                                hdr->addr1);
2523                 goto drop;
2524         }
2525
2526         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2527
2528         if (ieee80211_is_data_qos(fc)) {
2529                 qc = ieee80211_get_qos_ctl(hdr);
2530                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
2531                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2532                                 IEEE80211_SCTL_SEQ;
2533                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2534                         (hdr->seq_ctrl &
2535                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2536                 seq_number += 0x10;
2537         }
2538
2539         /* Descriptor for chosen Tx queue */
2540         txq = &priv->txq[txq_id];
2541         q = &txq->q;
2542
2543         spin_lock_irqsave(&priv->lock, flags);
2544
2545         /* Set up first empty TFD within this queue's circular TFD buffer */
2546         tfd = &txq->bd[q->write_ptr];
2547         memset(tfd, 0, sizeof(*tfd));
2548         control_flags = (u32 *) tfd;
2549         idx = get_cmd_index(q, q->write_ptr, 0);
2550
2551         /* Set up driver data for this TFD */
2552         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2553         txq->txb[q->write_ptr].skb[0] = skb;
2554
2555         /* Init first empty entry in queue's array of Tx/cmd buffers */
2556         out_cmd = &txq->cmd[idx];
2557         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2558         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2559
2560         /*
2561          * Set up the Tx-command (not MAC!) header.
2562          * Store the chosen Tx queue and TFD index within the sequence field;
2563          * after Tx, uCode's Tx response will return this value so driver can
2564          * locate the frame within the tx queue and do post-tx processing.
2565          */
2566         out_cmd->hdr.cmd = REPLY_TX;
2567         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2568                                 INDEX_TO_SEQ(q->write_ptr)));
2569
2570         /* Copy MAC header from skb into command buffer */
2571         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2572
2573         /*
2574          * Use the first empty entry in this queue's command buffer array
2575          * to contain the Tx command and MAC header concatenated together
2576          * (payload data will be in another buffer).
2577          * Size of this varies, due to varying MAC header length.
2578          * If end is not dword aligned, we'll have 2 extra bytes at the end
2579          * of the MAC header (device reads on dword boundaries).
2580          * We'll tell device about this padding later.
2581          */
2582         len = priv->hw_setting.tx_cmd_len +
2583                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2584
2585         len_org = len;
2586         len = (len + 3) & ~3;
2587
2588         if (len_org != len)
2589                 len_org = 1;
2590         else
2591                 len_org = 0;
2592
2593         /* Physical address of this Tx command's header (not MAC header!),
2594          * within command buffer array. */
2595         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2596                      offsetof(struct iwl3945_cmd, hdr);
2597
2598         /* Add buffer containing Tx command and MAC(!) header to TFD's
2599          * first entry */
2600         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2601
2602         if (info->control.hw_key)
2603                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
2604
2605         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2606          * if any (802.11 null frames have no payload). */
2607         len = skb->len - hdr_len;
2608         if (len) {
2609                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2610                                            len, PCI_DMA_TODEVICE);
2611                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2612         }
2613
2614         if (!len)
2615                 /* If there is no payload, then we use only one Tx buffer */
2616                 *control_flags = TFD_CTL_COUNT_SET(1);
2617         else
2618                 /* Else use 2 buffers.
2619                  * Tell 3945 about any padding after MAC header */
2620                 *control_flags = TFD_CTL_COUNT_SET(2) |
2621                         TFD_CTL_PAD_SET(U32_PAD(len));
2622
2623         /* Total # bytes to be transmitted */
2624         len = (u16)skb->len;
2625         out_cmd->cmd.tx.len = cpu_to_le16(len);
2626
2627         /* TODO need this for burst mode later on */
2628         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, unicast, sta_id);
2629
2630         /* set is_hcca to 0; it probably will never be implemented */
2631         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
2632
2633         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2634         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2635
2636         if (!ieee80211_has_morefrags(hdr->frame_control)) {
2637                 txq->need_update = 1;
2638                 if (qc)
2639                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2640         } else {
2641                 wait_write_ptr = 1;
2642                 txq->need_update = 0;
2643         }
2644
2645         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2646                            sizeof(out_cmd->cmd.tx));
2647
2648         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2649                            ieee80211_hdrlen(fc));
2650
2651         /* Tell device the write index *just past* this latest filled TFD */
2652         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2653         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2654         spin_unlock_irqrestore(&priv->lock, flags);
2655
2656         if (rc)
2657                 return rc;
2658
2659         if ((iwl3945_queue_space(q) < q->high_mark)
2660             && priv->mac80211_registered) {
2661                 if (wait_write_ptr) {
2662                         spin_lock_irqsave(&priv->lock, flags);
2663                         txq->need_update = 1;
2664                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2665                         spin_unlock_irqrestore(&priv->lock, flags);
2666                 }
2667
2668                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
2669         }
2670
2671         return 0;
2672
2673 drop_unlock:
2674         spin_unlock_irqrestore(&priv->lock, flags);
2675 drop:
2676         return -1;
2677 }
2678
2679 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2680 {
2681         const struct ieee80211_supported_band *sband = NULL;
2682         struct ieee80211_rate *rate;
2683         int i;
2684
2685         sband = iwl3945_get_band(priv, priv->band);
2686         if (!sband) {
2687                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2688                 return;
2689         }
2690
2691         priv->active_rate = 0;
2692         priv->active_rate_basic = 0;
2693
2694         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2695                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2696
2697         for (i = 0; i < sband->n_bitrates; i++) {
2698                 rate = &sband->bitrates[i];
2699                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2700                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2701                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2702                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2703                         priv->active_rate |= (1 << rate->hw_value);
2704                 }
2705         }
2706
2707         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2708                        priv->active_rate, priv->active_rate_basic);
2709
2710         /*
2711          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2712          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2713          * OFDM
2714          */
2715         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2716                 priv->staging_rxon.cck_basic_rates =
2717                     ((priv->active_rate_basic &
2718                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2719         else
2720                 priv->staging_rxon.cck_basic_rates =
2721                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2722
2723         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2724                 priv->staging_rxon.ofdm_basic_rates =
2725                     ((priv->active_rate_basic &
2726                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2727                       IWL_FIRST_OFDM_RATE) & 0xFF;
2728         else
2729                 priv->staging_rxon.ofdm_basic_rates =
2730                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2731 }
2732
2733 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2734 {
2735         unsigned long flags;
2736
2737         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2738                 return;
2739
2740         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2741                           disable_radio ? "OFF" : "ON");
2742
2743         if (disable_radio) {
2744                 iwl3945_scan_cancel(priv);
2745                 /* FIXME: This is a workaround for AP */
2746                 if (priv->iw_mode != NL80211_IFTYPE_AP) {
2747                         spin_lock_irqsave(&priv->lock, flags);
2748                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2749                                     CSR_UCODE_SW_BIT_RFKILL);
2750                         spin_unlock_irqrestore(&priv->lock, flags);
2751                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2752                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2753                 }
2754                 return;
2755         }
2756
2757         spin_lock_irqsave(&priv->lock, flags);
2758         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2759
2760         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2761         spin_unlock_irqrestore(&priv->lock, flags);
2762
2763         /* wake up ucode */
2764         msleep(10);
2765
2766         spin_lock_irqsave(&priv->lock, flags);
2767         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2768         if (!iwl3945_grab_nic_access(priv))
2769                 iwl3945_release_nic_access(priv);
2770         spin_unlock_irqrestore(&priv->lock, flags);
2771
2772         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2773                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2774                                   "disabled by HW switch\n");
2775                 return;
2776         }
2777
2778         if (priv->is_open)
2779                 queue_work(priv->workqueue, &priv->restart);
2780         return;
2781 }
2782
2783 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2784                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2785 {
2786         u16 fc =
2787             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2788
2789         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2790                 return;
2791
2792         if (!(fc & IEEE80211_FCTL_PROTECTED))
2793                 return;
2794
2795         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2796         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2797         case RX_RES_STATUS_SEC_TYPE_TKIP:
2798                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2799                     RX_RES_STATUS_BAD_ICV_MIC)
2800                         stats->flag |= RX_FLAG_MMIC_ERROR;
2801         case RX_RES_STATUS_SEC_TYPE_WEP:
2802         case RX_RES_STATUS_SEC_TYPE_CCMP:
2803                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2804                     RX_RES_STATUS_DECRYPT_OK) {
2805                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2806                         stats->flag |= RX_FLAG_DECRYPTED;
2807                 }
2808                 break;
2809
2810         default:
2811                 break;
2812         }
2813 }
2814
2815 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2816
2817 #include "iwl-spectrum.h"
2818
2819 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2820 #define BEACON_TIME_MASK_HIGH   0xFF000000
2821 #define TIME_UNIT               1024
2822
2823 /*
2824  * extended beacon time format
2825  * time in usec will be changed into a 32-bit value in 8:24 format
2826  * the high 1 byte is the beacon counts
2827  * the lower 3 bytes is the time in usec within one beacon interval
2828  */
2829
2830 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2831 {
2832         u32 quot;
2833         u32 rem;
2834         u32 interval = beacon_interval * 1024;
2835
2836         if (!interval || !usec)
2837                 return 0;
2838
2839         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2840         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2841
2842         return (quot << 24) + rem;
2843 }
2844
2845 /* base is usually what we get from ucode with each received frame,
2846  * the same as HW timer counter counting down
2847  */
2848
2849 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2850 {
2851         u32 base_low = base & BEACON_TIME_MASK_LOW;
2852         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2853         u32 interval = beacon_interval * TIME_UNIT;
2854         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2855             (addon & BEACON_TIME_MASK_HIGH);
2856
2857         if (base_low > addon_low)
2858                 res += base_low - addon_low;
2859         else if (base_low < addon_low) {
2860                 res += interval + base_low - addon_low;
2861                 res += (1 << 24);
2862         } else
2863                 res += (1 << 24);
2864
2865         return cpu_to_le32(res);
2866 }
2867
2868 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
2869                                struct ieee80211_measurement_params *params,
2870                                u8 type)
2871 {
2872         struct iwl3945_spectrum_cmd spectrum;
2873         struct iwl3945_rx_packet *res;
2874         struct iwl3945_host_cmd cmd = {
2875                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2876                 .data = (void *)&spectrum,
2877                 .meta.flags = CMD_WANT_SKB,
2878         };
2879         u32 add_time = le64_to_cpu(params->start_time);
2880         int rc;
2881         int spectrum_resp_status;
2882         int duration = le16_to_cpu(params->duration);
2883
2884         if (iwl3945_is_associated(priv))
2885                 add_time =
2886                     iwl3945_usecs_to_beacons(
2887                         le64_to_cpu(params->start_time) - priv->last_tsf,
2888                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2889
2890         memset(&spectrum, 0, sizeof(spectrum));
2891
2892         spectrum.channel_count = cpu_to_le16(1);
2893         spectrum.flags =
2894             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2895         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2896         cmd.len = sizeof(spectrum);
2897         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2898
2899         if (iwl3945_is_associated(priv))
2900                 spectrum.start_time =
2901                     iwl3945_add_beacon_time(priv->last_beacon_time,
2902                                 add_time,
2903                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2904         else
2905                 spectrum.start_time = 0;
2906
2907         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2908         spectrum.channels[0].channel = params->channel;
2909         spectrum.channels[0].type = type;
2910         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2911                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2912                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2913
2914         rc = iwl3945_send_cmd_sync(priv, &cmd);
2915         if (rc)
2916                 return rc;
2917
2918         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
2919         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2920                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2921                 rc = -EIO;
2922         }
2923
2924         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2925         switch (spectrum_resp_status) {
2926         case 0:         /* Command will be handled */
2927                 if (res->u.spectrum.id != 0xff) {
2928                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
2929                                                 res->u.spectrum.id);
2930                         priv->measurement_status &= ~MEASUREMENT_READY;
2931                 }
2932                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2933                 rc = 0;
2934                 break;
2935
2936         case 1:         /* Command will not be handled */
2937                 rc = -EAGAIN;
2938                 break;
2939         }
2940
2941         dev_kfree_skb_any(cmd.meta.u.skb);
2942
2943         return rc;
2944 }
2945 #endif
2946
2947 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
2948                                struct iwl3945_rx_mem_buffer *rxb)
2949 {
2950         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
2951         struct iwl3945_alive_resp *palive;
2952         struct delayed_work *pwork;
2953
2954         palive = &pkt->u.alive_frame;
2955
2956         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2957                        "0x%01X 0x%01X\n",
2958                        palive->is_valid, palive->ver_type,
2959                        palive->ver_subtype);
2960
2961         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2962                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2963                 memcpy(&priv->card_alive_init,
2964                        &pkt->u.alive_frame,
2965                        sizeof(struct iwl3945_init_alive_resp));
2966                 pwork = &priv->init_alive_start;
2967         } else {
2968                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2969                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2970                        sizeof(struct iwl3945_alive_resp));
2971                 pwork = &priv->alive_start;
2972                 iwl3945_disable_events(priv);
2973         }
2974
2975         /* We delay the ALIVE response by 5ms to
2976          * give the HW RF Kill time to activate... */
2977         if (palive->is_valid == UCODE_VALID_OK)
2978                 queue_delayed_work(priv->workqueue, pwork,
2979                                    msecs_to_jiffies(5));
2980         else
2981                 IWL_WARNING("uCode did not respond OK.\n");
2982 }
2983
2984 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
2985                                  struct iwl3945_rx_mem_buffer *rxb)
2986 {
2987         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
2988
2989         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2990         return;
2991 }
2992
2993 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
2994                                struct iwl3945_rx_mem_buffer *rxb)
2995 {
2996         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
2997
2998         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2999                 "seq 0x%04X ser 0x%08X\n",
3000                 le32_to_cpu(pkt->u.err_resp.error_type),
3001                 get_cmd_string(pkt->u.err_resp.cmd_id),
3002                 pkt->u.err_resp.cmd_id,
3003                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3004                 le32_to_cpu(pkt->u.err_resp.error_info));
3005 }
3006
3007 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3008
3009 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3010 {
3011         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3012         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3013         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3014         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3015                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3016         rxon->channel = csa->channel;
3017         priv->staging_rxon.channel = csa->channel;
3018 }
3019
3020 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3021                                           struct iwl3945_rx_mem_buffer *rxb)
3022 {
3023 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3024         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3025         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3026
3027         if (!report->state) {
3028                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3029                           "Spectrum Measure Notification: Start\n");
3030                 return;
3031         }
3032
3033         memcpy(&priv->measure_report, report, sizeof(*report));
3034         priv->measurement_status |= MEASUREMENT_READY;
3035 #endif
3036 }
3037
3038 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3039                                   struct iwl3945_rx_mem_buffer *rxb)
3040 {
3041 #ifdef CONFIG_IWL3945_DEBUG
3042         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3043         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3044         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3045                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3046 #endif
3047 }
3048
3049 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3050                                              struct iwl3945_rx_mem_buffer *rxb)
3051 {
3052         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3053         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3054                         "notification for %s:\n",
3055                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3056         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3057 }
3058
3059 static void iwl3945_bg_beacon_update(struct work_struct *work)
3060 {
3061         struct iwl3945_priv *priv =
3062                 container_of(work, struct iwl3945_priv, beacon_update);
3063         struct sk_buff *beacon;
3064
3065         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3066         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
3067
3068         if (!beacon) {
3069                 IWL_ERROR("update beacon failed\n");
3070                 return;
3071         }
3072
3073         mutex_lock(&priv->mutex);
3074         /* new beacon skb is allocated every time; dispose previous.*/
3075         if (priv->ibss_beacon)
3076                 dev_kfree_skb(priv->ibss_beacon);
3077
3078         priv->ibss_beacon = beacon;
3079         mutex_unlock(&priv->mutex);
3080
3081         iwl3945_send_beacon_cmd(priv);
3082 }
3083
3084 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3085                                 struct iwl3945_rx_mem_buffer *rxb)
3086 {
3087 #ifdef CONFIG_IWL3945_DEBUG
3088         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3089         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3090         u8 rate = beacon->beacon_notify_hdr.rate;
3091
3092         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3093                 "tsf %d %d rate %d\n",
3094                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3095                 beacon->beacon_notify_hdr.failure_frame,
3096                 le32_to_cpu(beacon->ibss_mgr_status),
3097                 le32_to_cpu(beacon->high_tsf),
3098                 le32_to_cpu(beacon->low_tsf), rate);
3099 #endif
3100
3101         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
3102             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3103                 queue_work(priv->workqueue, &priv->beacon_update);
3104 }
3105
3106 /* Service response to REPLY_SCAN_CMD (0x80) */
3107 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3108                               struct iwl3945_rx_mem_buffer *rxb)
3109 {
3110 #ifdef CONFIG_IWL3945_DEBUG
3111         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3112         struct iwl3945_scanreq_notification *notif =
3113             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3114
3115         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3116 #endif
3117 }
3118
3119 /* Service SCAN_START_NOTIFICATION (0x82) */
3120 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3121                                     struct iwl3945_rx_mem_buffer *rxb)
3122 {
3123         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3124         struct iwl3945_scanstart_notification *notif =
3125             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3126         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3127         IWL_DEBUG_SCAN("Scan start: "
3128                        "%d [802.11%s] "
3129                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3130                        notif->channel,
3131                        notif->band ? "bg" : "a",
3132                        notif->tsf_high,
3133                        notif->tsf_low, notif->status, notif->beacon_timer);
3134 }
3135
3136 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3137 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3138                                       struct iwl3945_rx_mem_buffer *rxb)
3139 {
3140         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3141         struct iwl3945_scanresults_notification *notif =
3142             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3143
3144         IWL_DEBUG_SCAN("Scan ch.res: "
3145                        "%d [802.11%s] "
3146                        "(TSF: 0x%08X:%08X) - %d "
3147                        "elapsed=%lu usec (%dms since last)\n",
3148                        notif->channel,
3149                        notif->band ? "bg" : "a",
3150                        le32_to_cpu(notif->tsf_high),
3151                        le32_to_cpu(notif->tsf_low),
3152                        le32_to_cpu(notif->statistics[0]),
3153                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3154                        jiffies_to_msecs(elapsed_jiffies
3155                                         (priv->last_scan_jiffies, jiffies)));
3156
3157         priv->last_scan_jiffies = jiffies;
3158         priv->next_scan_jiffies = 0;
3159 }
3160
3161 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3162 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3163                                        struct iwl3945_rx_mem_buffer *rxb)
3164 {
3165         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3166         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3167
3168         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3169                        scan_notif->scanned_channels,
3170                        scan_notif->tsf_low,
3171                        scan_notif->tsf_high, scan_notif->status);
3172
3173         /* The HW is no longer scanning */
3174         clear_bit(STATUS_SCAN_HW, &priv->status);
3175
3176         /* The scan completion notification came in, so kill that timer... */
3177         cancel_delayed_work(&priv->scan_check);
3178
3179         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3180                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
3181                                                         "2.4" : "5.2",
3182                        jiffies_to_msecs(elapsed_jiffies
3183                                         (priv->scan_pass_start, jiffies)));
3184
3185         /* Remove this scanned band from the list of pending
3186          * bands to scan, band G precedes A in order of scanning
3187          * as seen in iwl3945_bg_request_scan */
3188         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
3189                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
3190         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
3191                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
3192
3193         /* If a request to abort was given, or the scan did not succeed
3194          * then we reset the scan state machine and terminate,
3195          * re-queuing another scan if one has been requested */
3196         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3197                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3198                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3199         } else {
3200                 /* If there are more bands on this scan pass reschedule */
3201                 if (priv->scan_bands > 0)
3202                         goto reschedule;
3203         }
3204
3205         priv->last_scan_jiffies = jiffies;
3206         priv->next_scan_jiffies = 0;
3207         IWL_DEBUG_INFO("Setting scan to off\n");
3208
3209         clear_bit(STATUS_SCANNING, &priv->status);
3210
3211         IWL_DEBUG_INFO("Scan took %dms\n",
3212                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3213
3214         queue_work(priv->workqueue, &priv->scan_completed);
3215
3216         return;
3217
3218 reschedule:
3219         priv->scan_pass_start = jiffies;
3220         queue_work(priv->workqueue, &priv->request_scan);
3221 }
3222
3223 /* Handle notification from uCode that card's power state is changing
3224  * due to software, hardware, or critical temperature RFKILL */
3225 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3226                                     struct iwl3945_rx_mem_buffer *rxb)
3227 {
3228         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3229         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3230         unsigned long status = priv->status;
3231
3232         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3233                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3234                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3235
3236         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3237                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3238
3239         if (flags & HW_CARD_DISABLED)
3240                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3241         else
3242                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3243
3244
3245         if (flags & SW_CARD_DISABLED)
3246                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3247         else
3248                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3249
3250         iwl3945_scan_cancel(priv);
3251
3252         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3253              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3254             (test_bit(STATUS_RF_KILL_SW, &status) !=
3255              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3256                 queue_work(priv->workqueue, &priv->rf_kill);
3257         else
3258                 wake_up_interruptible(&priv->wait_command_queue);
3259 }
3260
3261 /**
3262  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3263  *
3264  * Setup the RX handlers for each of the reply types sent from the uCode
3265  * to the host.
3266  *
3267  * This function chains into the hardware specific files for them to setup
3268  * any hardware specific handlers as well.
3269  */
3270 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3271 {
3272         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3273         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3274         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3275         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3276         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3277             iwl3945_rx_spectrum_measure_notif;
3278         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3279         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3280             iwl3945_rx_pm_debug_statistics_notif;
3281         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3282
3283         /*
3284          * The same handler is used for both the REPLY to a discrete
3285          * statistics request from the host as well as for the periodic
3286          * statistics notifications (after received beacons) from the uCode.
3287          */
3288         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3289         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3290
3291         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3292         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3293         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3294             iwl3945_rx_scan_results_notif;
3295         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3296             iwl3945_rx_scan_complete_notif;
3297         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3298
3299         /* Set up hardware specific Rx handlers */
3300         iwl3945_hw_rx_handler_setup(priv);
3301 }
3302
3303 /**
3304  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3305  * When FW advances 'R' index, all entries between old and new 'R' index
3306  * need to be reclaimed.
3307  */
3308 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3309                                       int txq_id, int index)
3310 {
3311         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3312         struct iwl3945_queue *q = &txq->q;
3313         int nfreed = 0;
3314
3315         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3316                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3317                           "is out of range [0-%d] %d %d.\n", txq_id,
3318                           index, q->n_bd, q->write_ptr, q->read_ptr);
3319                 return;
3320         }
3321
3322         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3323                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3324                 if (nfreed > 1) {
3325                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3326                                         q->write_ptr, q->read_ptr);
3327                         queue_work(priv->workqueue, &priv->restart);
3328                         break;
3329                 }
3330                 nfreed++;
3331         }
3332 }
3333
3334
3335 /**
3336  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3337  * @rxb: Rx buffer to reclaim
3338  *
3339  * If an Rx buffer has an async callback associated with it the callback
3340  * will be executed.  The attached skb (if present) will only be freed
3341  * if the callback returns 1
3342  */
3343 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3344                                 struct iwl3945_rx_mem_buffer *rxb)
3345 {
3346         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3347         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3348         int txq_id = SEQ_TO_QUEUE(sequence);
3349         int index = SEQ_TO_INDEX(sequence);
3350         int huge = sequence & SEQ_HUGE_FRAME;
3351         int cmd_index;
3352         struct iwl3945_cmd *cmd;
3353
3354         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3355
3356         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3357         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3358
3359         /* Input error checking is done when commands are added to queue. */
3360         if (cmd->meta.flags & CMD_WANT_SKB) {
3361                 cmd->meta.source->u.skb = rxb->skb;
3362                 rxb->skb = NULL;
3363         } else if (cmd->meta.u.callback &&
3364                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3365                 rxb->skb = NULL;
3366
3367         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3368
3369         if (!(cmd->meta.flags & CMD_ASYNC)) {
3370                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3371                 wake_up_interruptible(&priv->wait_command_queue);
3372         }
3373 }
3374
3375 /************************** RX-FUNCTIONS ****************************/
3376 /*
3377  * Rx theory of operation
3378  *
3379  * The host allocates 32 DMA target addresses and passes the host address
3380  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3381  * 0 to 31
3382  *
3383  * Rx Queue Indexes
3384  * The host/firmware share two index registers for managing the Rx buffers.
3385  *
3386  * The READ index maps to the first position that the firmware may be writing
3387  * to -- the driver can read up to (but not including) this position and get
3388  * good data.
3389  * The READ index is managed by the firmware once the card is enabled.
3390  *
3391  * The WRITE index maps to the last position the driver has read from -- the
3392  * position preceding WRITE is the last slot the firmware can place a packet.
3393  *
3394  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3395  * WRITE = READ.
3396  *
3397  * During initialization, the host sets up the READ queue position to the first
3398  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3399  *
3400  * When the firmware places a packet in a buffer, it will advance the READ index
3401  * and fire the RX interrupt.  The driver can then query the READ index and
3402  * process as many packets as possible, moving the WRITE index forward as it
3403  * resets the Rx queue buffers with new memory.
3404  *
3405  * The management in the driver is as follows:
3406  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3407  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3408  *   to replenish the iwl->rxq->rx_free.
3409  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3410  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3411  *   'processed' and 'read' driver indexes as well)
3412  * + A received packet is processed and handed to the kernel network stack,
3413  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3414  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3415  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3416  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3417  *   were enough free buffers and RX_STALLED is set it is cleared.
3418  *
3419  *
3420  * Driver sequence:
3421  *
3422  * iwl3945_rx_queue_alloc()   Allocates rx_free
3423  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3424  *                            iwl3945_rx_queue_restock
3425  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3426  *                            queue, updates firmware pointers, and updates
3427  *                            the WRITE index.  If insufficient rx_free buffers
3428  *                            are available, schedules iwl3945_rx_replenish
3429  *
3430  * -- enable interrupts --
3431  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3432  *                            READ INDEX, detaching the SKB from the pool.
3433  *                            Moves the packet buffer from queue to rx_used.
3434  *                            Calls iwl3945_rx_queue_restock to refill any empty
3435  *                            slots.
3436  * ...
3437  *
3438  */
3439
3440 /**
3441  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3442  */
3443 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3444 {
3445         int s = q->read - q->write;
3446         if (s <= 0)
3447                 s += RX_QUEUE_SIZE;
3448         /* keep some buffer to not confuse full and empty queue */
3449         s -= 2;
3450         if (s < 0)
3451                 s = 0;
3452         return s;
3453 }
3454
3455 /**
3456  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3457  */
3458 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3459 {
3460         u32 reg = 0;
3461         int rc = 0;
3462         unsigned long flags;
3463
3464         spin_lock_irqsave(&q->lock, flags);
3465
3466         if (q->need_update == 0)
3467                 goto exit_unlock;
3468
3469         /* If power-saving is in use, make sure device is awake */
3470         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3471                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3472
3473                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3474                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3475                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3476                         goto exit_unlock;
3477                 }
3478
3479                 rc = iwl3945_grab_nic_access(priv);
3480                 if (rc)
3481                         goto exit_unlock;
3482
3483                 /* Device expects a multiple of 8 */
3484                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3485                                      q->write & ~0x7);
3486                 iwl3945_release_nic_access(priv);
3487
3488         /* Else device is assumed to be awake */
3489         } else
3490                 /* Device expects a multiple of 8 */
3491                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3492
3493
3494         q->need_update = 0;
3495
3496  exit_unlock:
3497         spin_unlock_irqrestore(&q->lock, flags);
3498         return rc;
3499 }
3500
3501 /**
3502  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3503  */
3504 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3505                                           dma_addr_t dma_addr)
3506 {
3507         return cpu_to_le32((u32)dma_addr);
3508 }
3509
3510 /**
3511  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3512  *
3513  * If there are slots in the RX queue that need to be restocked,
3514  * and we have free pre-allocated buffers, fill the ranks as much
3515  * as we can, pulling from rx_free.
3516  *
3517  * This moves the 'write' index forward to catch up with 'processed', and
3518  * also updates the memory address in the firmware to reference the new
3519  * target buffer.
3520  */
3521 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3522 {
3523         struct iwl3945_rx_queue *rxq = &priv->rxq;
3524         struct list_head *element;
3525         struct iwl3945_rx_mem_buffer *rxb;
3526         unsigned long flags;
3527         int write, rc;
3528
3529         spin_lock_irqsave(&rxq->lock, flags);
3530         write = rxq->write & ~0x7;
3531         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3532                 /* Get next free Rx buffer, remove from free list */
3533                 element = rxq->rx_free.next;
3534                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3535                 list_del(element);
3536
3537                 /* Point to Rx buffer via next RBD in circular buffer */
3538                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3539                 rxq->queue[rxq->write] = rxb;
3540                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3541                 rxq->free_count--;
3542         }
3543         spin_unlock_irqrestore(&rxq->lock, flags);
3544         /* If the pre-allocated buffer pool is dropping low, schedule to
3545          * refill it */
3546         if (rxq->free_count <= RX_LOW_WATERMARK)
3547                 queue_work(priv->workqueue, &priv->rx_replenish);
3548
3549
3550         /* If we've added more space for the firmware to place data, tell it.
3551          * Increment device's write pointer in multiples of 8. */
3552         if ((write != (rxq->write & ~0x7))
3553             || (abs(rxq->write - rxq->read) > 7)) {
3554                 spin_lock_irqsave(&rxq->lock, flags);
3555                 rxq->need_update = 1;
3556                 spin_unlock_irqrestore(&rxq->lock, flags);
3557                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3558                 if (rc)
3559                         return rc;
3560         }
3561
3562         return 0;
3563 }
3564
3565 /**
3566  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3567  *
3568  * When moving to rx_free an SKB is allocated for the slot.
3569  *
3570  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3571  * This is called as a scheduled work item (except for during initialization)
3572  */
3573 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3574 {
3575         struct iwl3945_rx_queue *rxq = &priv->rxq;
3576         struct list_head *element;
3577         struct iwl3945_rx_mem_buffer *rxb;
3578         unsigned long flags;
3579         spin_lock_irqsave(&rxq->lock, flags);
3580         while (!list_empty(&rxq->rx_used)) {
3581                 element = rxq->rx_used.next;
3582                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3583
3584                 /* Alloc a new receive buffer */
3585                 rxb->skb =
3586                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3587                 if (!rxb->skb) {
3588                         if (net_ratelimit())
3589                                 printk(KERN_CRIT DRV_NAME
3590                                        ": Can not allocate SKB buffers\n");
3591                         /* We don't reschedule replenish work here -- we will
3592                          * call the restock method and if it still needs
3593                          * more buffers it will schedule replenish */
3594                         break;
3595                 }
3596
3597                 /* If radiotap head is required, reserve some headroom here.
3598                  * The physical head count is a variable rx_stats->phy_count.
3599                  * We reserve 4 bytes here. Plus these extra bytes, the
3600                  * headroom of the physical head should be enough for the
3601                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3602                  */
3603                 skb_reserve(rxb->skb, 4);
3604
3605                 priv->alloc_rxb_skb++;
3606                 list_del(element);
3607
3608                 /* Get physical address of RB/SKB */
3609                 rxb->dma_addr =
3610                     pci_map_single(priv->pci_dev, rxb->skb->data,
3611                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3612                 list_add_tail(&rxb->list, &rxq->rx_free);
3613                 rxq->free_count++;
3614         }
3615         spin_unlock_irqrestore(&rxq->lock, flags);
3616 }
3617
3618 /*
3619  * this should be called while priv->lock is locked
3620  */
3621 static void __iwl3945_rx_replenish(void *data)
3622 {
3623         struct iwl3945_priv *priv = data;
3624
3625         iwl3945_rx_allocate(priv);
3626         iwl3945_rx_queue_restock(priv);
3627 }
3628
3629
3630 void iwl3945_rx_replenish(void *data)
3631 {
3632         struct iwl3945_priv *priv = data;
3633         unsigned long flags;
3634
3635         iwl3945_rx_allocate(priv);
3636
3637         spin_lock_irqsave(&priv->lock, flags);
3638         iwl3945_rx_queue_restock(priv);
3639         spin_unlock_irqrestore(&priv->lock, flags);
3640 }
3641
3642 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3643  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3644  * This free routine walks the list of POOL entries and if SKB is set to
3645  * non NULL it is unmapped and freed
3646  */
3647 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3648 {
3649         int i;
3650         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3651                 if (rxq->pool[i].skb != NULL) {
3652                         pci_unmap_single(priv->pci_dev,
3653                                          rxq->pool[i].dma_addr,
3654                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3655                         dev_kfree_skb(rxq->pool[i].skb);
3656                 }
3657         }
3658
3659         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3660                             rxq->dma_addr);
3661         rxq->bd = NULL;
3662 }
3663
3664 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3665 {
3666         struct iwl3945_rx_queue *rxq = &priv->rxq;
3667         struct pci_dev *dev = priv->pci_dev;
3668         int i;
3669
3670         spin_lock_init(&rxq->lock);
3671         INIT_LIST_HEAD(&rxq->rx_free);
3672         INIT_LIST_HEAD(&rxq->rx_used);
3673
3674         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3675         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3676         if (!rxq->bd)
3677                 return -ENOMEM;
3678
3679         /* Fill the rx_used queue with _all_ of the Rx buffers */
3680         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3681                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3682
3683         /* Set us so that we have processed and used all buffers, but have
3684          * not restocked the Rx queue with fresh buffers */
3685         rxq->read = rxq->write = 0;
3686         rxq->free_count = 0;
3687         rxq->need_update = 0;
3688         return 0;
3689 }
3690
3691 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3692 {
3693         unsigned long flags;
3694         int i;
3695         spin_lock_irqsave(&rxq->lock, flags);
3696         INIT_LIST_HEAD(&rxq->rx_free);
3697         INIT_LIST_HEAD(&rxq->rx_used);
3698         /* Fill the rx_used queue with _all_ of the Rx buffers */
3699         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3700                 /* In the reset function, these buffers may have been allocated
3701                  * to an SKB, so we need to unmap and free potential storage */
3702                 if (rxq->pool[i].skb != NULL) {
3703                         pci_unmap_single(priv->pci_dev,
3704                                          rxq->pool[i].dma_addr,
3705                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3706                         priv->alloc_rxb_skb--;
3707                         dev_kfree_skb(rxq->pool[i].skb);
3708                         rxq->pool[i].skb = NULL;
3709                 }
3710                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3711         }
3712
3713         /* Set us so that we have processed and used all buffers, but have
3714          * not restocked the Rx queue with fresh buffers */
3715         rxq->read = rxq->write = 0;
3716         rxq->free_count = 0;
3717         spin_unlock_irqrestore(&rxq->lock, flags);
3718 }
3719
3720 /* Convert linear signal-to-noise ratio into dB */
3721 static u8 ratio2dB[100] = {
3722 /*       0   1   2   3   4   5   6   7   8   9 */
3723          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3724         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3725         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3726         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3727         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3728         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3729         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3730         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3731         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3732         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3733 };
3734
3735 /* Calculates a relative dB value from a ratio of linear
3736  *   (i.e. not dB) signal levels.
3737  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3738 int iwl3945_calc_db_from_ratio(int sig_ratio)
3739 {
3740         /* 1000:1 or higher just report as 60 dB */
3741         if (sig_ratio >= 1000)
3742                 return 60;
3743
3744         /* 100:1 or higher, divide by 10 and use table,
3745          *   add 20 dB to make up for divide by 10 */
3746         if (sig_ratio >= 100)
3747                 return 20 + (int)ratio2dB[sig_ratio/10];
3748
3749         /* We shouldn't see this */
3750         if (sig_ratio < 1)
3751                 return 0;
3752
3753         /* Use table for ratios 1:1 - 99:1 */
3754         return (int)ratio2dB[sig_ratio];
3755 }
3756
3757 #define PERFECT_RSSI (-20) /* dBm */
3758 #define WORST_RSSI (-95)   /* dBm */
3759 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3760
3761 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3762  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3763  *   about formulas used below. */
3764 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3765 {
3766         int sig_qual;
3767         int degradation = PERFECT_RSSI - rssi_dbm;
3768
3769         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3770          * as indicator; formula is (signal dbm - noise dbm).
3771          * SNR at or above 40 is a great signal (100%).
3772          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3773          * Weakest usable signal is usually 10 - 15 dB SNR. */
3774         if (noise_dbm) {
3775                 if (rssi_dbm - noise_dbm >= 40)
3776                         return 100;
3777                 else if (rssi_dbm < noise_dbm)
3778                         return 0;
3779                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3780
3781         /* Else use just the signal level.
3782          * This formula is a least squares fit of data points collected and
3783          *   compared with a reference system that had a percentage (%) display
3784          *   for signal quality. */
3785         } else
3786                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3787                             (15 * RSSI_RANGE + 62 * degradation)) /
3788                            (RSSI_RANGE * RSSI_RANGE);
3789
3790         if (sig_qual > 100)
3791                 sig_qual = 100;
3792         else if (sig_qual < 1)
3793                 sig_qual = 0;
3794
3795         return sig_qual;
3796 }
3797
3798 /**
3799  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3800  *
3801  * Uses the priv->rx_handlers callback function array to invoke
3802  * the appropriate handlers, including command responses,
3803  * frame-received notifications, and other notifications.
3804  */
3805 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3806 {
3807         struct iwl3945_rx_mem_buffer *rxb;
3808         struct iwl3945_rx_packet *pkt;
3809         struct iwl3945_rx_queue *rxq = &priv->rxq;
3810         u32 r, i;
3811         int reclaim;
3812         unsigned long flags;
3813         u8 fill_rx = 0;
3814         u32 count = 8;
3815
3816         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3817          * buffer that the driver may process (last buffer filled by ucode). */
3818         r = iwl3945_hw_get_rx_read(priv);
3819         i = rxq->read;
3820
3821         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3822                 fill_rx = 1;
3823         /* Rx interrupt, but nothing sent from uCode */
3824         if (i == r)
3825                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3826
3827         while (i != r) {
3828                 rxb = rxq->queue[i];
3829
3830                 /* If an RXB doesn't have a Rx queue slot associated with it,
3831                  * then a bug has been introduced in the queue refilling
3832                  * routines -- catch it here */
3833                 BUG_ON(rxb == NULL);
3834
3835                 rxq->queue[i] = NULL;
3836
3837                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3838                                             IWL_RX_BUF_SIZE,
3839                                             PCI_DMA_FROMDEVICE);
3840                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3841
3842                 /* Reclaim a command buffer only if this packet is a response
3843                  *   to a (driver-originated) command.
3844                  * If the packet (e.g. Rx frame) originated from uCode,
3845                  *   there is no command buffer to reclaim.
3846                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3847                  *   but apparently a few don't get set; catch them here. */
3848                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3849                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3850                         (pkt->hdr.cmd != REPLY_TX);
3851
3852                 /* Based on type of command response or notification,
3853                  *   handle those that need handling via function in
3854                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
3855                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3856                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3857                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3858                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3859                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3860                 } else {
3861                         /* No handling needed */
3862                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3863                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3864                                 r, i, get_cmd_string(pkt->hdr.cmd),
3865                                 pkt->hdr.cmd);
3866                 }
3867
3868                 if (reclaim) {
3869                         /* Invoke any callbacks, transfer the skb to caller, and
3870                          * fire off the (possibly) blocking iwl3945_send_cmd()
3871                          * as we reclaim the driver command queue */
3872                         if (rxb && rxb->skb)
3873                                 iwl3945_tx_cmd_complete(priv, rxb);
3874                         else
3875                                 IWL_WARNING("Claim null rxb?\n");
3876                 }
3877
3878                 /* For now we just don't re-use anything.  We can tweak this
3879                  * later to try and re-use notification packets and SKBs that
3880                  * fail to Rx correctly */
3881                 if (rxb->skb != NULL) {
3882                         priv->alloc_rxb_skb--;
3883                         dev_kfree_skb_any(rxb->skb);
3884                         rxb->skb = NULL;
3885                 }
3886
3887                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3888                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3889                 spin_lock_irqsave(&rxq->lock, flags);
3890                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3891                 spin_unlock_irqrestore(&rxq->lock, flags);
3892                 i = (i + 1) & RX_QUEUE_MASK;
3893                 /* If there are a lot of unused frames,
3894                  * restock the Rx queue so ucode won't assert. */
3895                 if (fill_rx) {
3896                         count++;
3897                         if (count >= 8) {
3898                                 priv->rxq.read = i;
3899                                 __iwl3945_rx_replenish(priv);
3900                                 count = 0;
3901                         }
3902                 }
3903         }
3904
3905         /* Backtrack one entry */
3906         priv->rxq.read = i;
3907         iwl3945_rx_queue_restock(priv);
3908 }
3909
3910 /**
3911  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
3912  */
3913 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
3914                                   struct iwl3945_tx_queue *txq)
3915 {
3916         u32 reg = 0;
3917         int rc = 0;
3918         int txq_id = txq->q.id;
3919
3920         if (txq->need_update == 0)
3921                 return rc;
3922
3923         /* if we're trying to save power */
3924         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3925                 /* wake up nic if it's powered down ...
3926                  * uCode will wake up, and interrupt us again, so next
3927                  * time we'll skip this part. */
3928                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3929
3930                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3931                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3932                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3933                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3934                         return rc;
3935                 }
3936
3937                 /* restore this queue's parameters in nic hardware. */
3938                 rc = iwl3945_grab_nic_access(priv);
3939                 if (rc)
3940                         return rc;
3941                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
3942                                      txq->q.write_ptr | (txq_id << 8));
3943                 iwl3945_release_nic_access(priv);
3944
3945         /* else not in power-save mode, uCode will never sleep when we're
3946          * trying to tx (during RFKILL, we're not trying to tx). */
3947         } else
3948                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
3949                             txq->q.write_ptr | (txq_id << 8));
3950
3951         txq->need_update = 0;
3952
3953         return rc;
3954 }
3955
3956 #ifdef CONFIG_IWL3945_DEBUG
3957 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
3958 {
3959         IWL_DEBUG_RADIO("RX CONFIG:\n");
3960         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3961         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3962         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3963         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3964                         le32_to_cpu(rxon->filter_flags));
3965         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3966         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3967                         rxon->ofdm_basic_rates);
3968         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3969         IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
3970         IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
3971         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3972 }
3973 #endif
3974
3975 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
3976 {
3977         IWL_DEBUG_ISR("Enabling interrupts\n");
3978         set_bit(STATUS_INT_ENABLED, &priv->status);
3979         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3980 }
3981
3982
3983 /* call this function to flush any scheduled tasklet */
3984 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
3985 {
3986         /* wait to make sure we flush pending tasklet*/
3987         synchronize_irq(priv->pci_dev->irq);
3988         tasklet_kill(&priv->irq_tasklet);
3989 }
3990
3991
3992 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
3993 {
3994         clear_bit(STATUS_INT_ENABLED, &priv->status);
3995
3996         /* disable interrupts from uCode/NIC to host */
3997         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
3998
3999         /* acknowledge/clear/reset any interrupts still pending
4000          * from uCode or flow handler (Rx/Tx DMA) */
4001         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4002         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4003         IWL_DEBUG_ISR("Disabled interrupts\n");
4004 }
4005
4006 static const char *desc_lookup(int i)
4007 {
4008         switch (i) {
4009         case 1:
4010                 return "FAIL";
4011         case 2:
4012                 return "BAD_PARAM";
4013         case 3:
4014                 return "BAD_CHECKSUM";
4015         case 4:
4016                 return "NMI_INTERRUPT";
4017         case 5:
4018                 return "SYSASSERT";
4019         case 6:
4020                 return "FATAL_ERROR";
4021         }
4022
4023         return "UNKNOWN";
4024 }
4025
4026 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4027 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4028
4029 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4030 {
4031         u32 i;
4032         u32 desc, time, count, base, data1;
4033         u32 blink1, blink2, ilink1, ilink2;
4034         int rc;
4035
4036         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4037
4038         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4039                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4040                 return;
4041         }
4042
4043         rc = iwl3945_grab_nic_access(priv);
4044         if (rc) {
4045                 IWL_WARNING("Can not read from adapter at this time.\n");
4046                 return;
4047         }
4048
4049         count = iwl3945_read_targ_mem(priv, base);
4050
4051         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4052                 IWL_ERROR("Start IWL Error Log Dump:\n");
4053                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4054         }
4055
4056         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4057                   "ilink1  nmiPC   Line\n");
4058         for (i = ERROR_START_OFFSET;
4059              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4060              i += ERROR_ELEM_SIZE) {
4061                 desc = iwl3945_read_targ_mem(priv, base + i);
4062                 time =
4063                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4064                 blink1 =
4065                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4066                 blink2 =
4067                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4068                 ilink1 =
4069                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4070                 ilink2 =
4071                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4072                 data1 =
4073                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4074
4075                 IWL_ERROR
4076                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4077                      desc_lookup(desc), desc, time, blink1, blink2,
4078                      ilink1, ilink2, data1);
4079         }
4080
4081         iwl3945_release_nic_access(priv);
4082
4083 }
4084
4085 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4086
4087 /**
4088  * iwl3945_print_event_log - Dump error event log to syslog
4089  *
4090  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4091  */
4092 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4093                                 u32 num_events, u32 mode)
4094 {
4095         u32 i;
4096         u32 base;       /* SRAM byte address of event log header */
4097         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4098         u32 ptr;        /* SRAM byte address of log data */
4099         u32 ev, time, data; /* event log data */
4100
4101         if (num_events == 0)
4102                 return;
4103
4104         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4105
4106         if (mode == 0)
4107                 event_size = 2 * sizeof(u32);
4108         else
4109                 event_size = 3 * sizeof(u32);
4110
4111         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4112
4113         /* "time" is actually "data" for mode 0 (no timestamp).
4114          * place event id # at far right for easier visual parsing. */
4115         for (i = 0; i < num_events; i++) {
4116                 ev = iwl3945_read_targ_mem(priv, ptr);
4117                 ptr += sizeof(u32);
4118                 time = iwl3945_read_targ_mem(priv, ptr);
4119                 ptr += sizeof(u32);
4120                 if (mode == 0)
4121                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4122                 else {
4123                         data = iwl3945_read_targ_mem(priv, ptr);
4124                         ptr += sizeof(u32);
4125                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4126                 }
4127         }
4128 }
4129
4130 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4131 {
4132         int rc;
4133         u32 base;       /* SRAM byte address of event log header */
4134         u32 capacity;   /* event log capacity in # entries */
4135         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4136         u32 num_wraps;  /* # times uCode wrapped to top of log */
4137         u32 next_entry; /* index of next entry to be written by uCode */
4138         u32 size;       /* # entries that we'll print */
4139
4140         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4141         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4142                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4143                 return;
4144         }
4145
4146         rc = iwl3945_grab_nic_access(priv);
4147         if (rc) {
4148                 IWL_WARNING("Can not read from adapter at this time.\n");
4149                 return;
4150         }
4151
4152         /* event log header */
4153         capacity = iwl3945_read_targ_mem(priv, base);
4154         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4155         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4156         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4157
4158         size = num_wraps ? capacity : next_entry;
4159
4160         /* bail out if nothing in log */
4161         if (size == 0) {
4162                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4163                 iwl3945_release_nic_access(priv);
4164                 return;
4165         }
4166
4167         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4168                   size, num_wraps);
4169
4170         /* if uCode has wrapped back to top of log, start at the oldest entry,
4171          * i.e the next one that uCode would fill. */
4172         if (num_wraps)
4173                 iwl3945_print_event_log(priv, next_entry,
4174                                     capacity - next_entry, mode);
4175
4176         /* (then/else) start at top of log */
4177         iwl3945_print_event_log(priv, 0, next_entry, mode);
4178
4179         iwl3945_release_nic_access(priv);
4180 }
4181
4182 /**
4183  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4184  */
4185 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4186 {
4187         /* Set the FW error flag -- cleared on iwl3945_down */
4188         set_bit(STATUS_FW_ERROR, &priv->status);
4189
4190         /* Cancel currently queued command. */
4191         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4192
4193 #ifdef CONFIG_IWL3945_DEBUG
4194         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4195                 iwl3945_dump_nic_error_log(priv);
4196                 iwl3945_dump_nic_event_log(priv);
4197                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4198         }
4199 #endif
4200
4201         wake_up_interruptible(&priv->wait_command_queue);
4202
4203         /* Keep the restart process from trying to send host
4204          * commands by clearing the INIT status bit */
4205         clear_bit(STATUS_READY, &priv->status);
4206
4207         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4208                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4209                           "Restarting adapter due to uCode error.\n");
4210
4211                 if (iwl3945_is_associated(priv)) {
4212                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4213                                sizeof(priv->recovery_rxon));
4214                         priv->error_recovering = 1;
4215                 }
4216                 queue_work(priv->workqueue, &priv->restart);
4217         }
4218 }
4219
4220 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4221 {
4222         unsigned long flags;
4223
4224         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4225                sizeof(priv->staging_rxon));
4226         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4227         iwl3945_commit_rxon(priv);
4228
4229         iwl3945_add_station(priv, priv->bssid, 1, 0);
4230
4231         spin_lock_irqsave(&priv->lock, flags);
4232         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4233         priv->error_recovering = 0;
4234         spin_unlock_irqrestore(&priv->lock, flags);
4235 }
4236
4237 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4238 {
4239         u32 inta, handled = 0;
4240         u32 inta_fh;
4241         unsigned long flags;
4242 #ifdef CONFIG_IWL3945_DEBUG
4243         u32 inta_mask;
4244 #endif
4245
4246         spin_lock_irqsave(&priv->lock, flags);
4247
4248         /* Ack/clear/reset pending uCode interrupts.
4249          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4250          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4251         inta = iwl3945_read32(priv, CSR_INT);
4252         iwl3945_write32(priv, CSR_INT, inta);
4253
4254         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4255          * Any new interrupts that happen after this, either while we're
4256          * in this tasklet, or later, will show up in next ISR/tasklet. */
4257         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4258         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4259
4260 #ifdef CONFIG_IWL3945_DEBUG
4261         if (iwl3945_debug_level & IWL_DL_ISR) {
4262                 /* just for debug */
4263                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4264                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4265                               inta, inta_mask, inta_fh);
4266         }
4267 #endif
4268
4269         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4270          * atomic, make sure that inta covers all the interrupts that
4271          * we've discovered, even if FH interrupt came in just after
4272          * reading CSR_INT. */
4273         if (inta_fh & CSR39_FH_INT_RX_MASK)
4274                 inta |= CSR_INT_BIT_FH_RX;
4275         if (inta_fh & CSR39_FH_INT_TX_MASK)
4276                 inta |= CSR_INT_BIT_FH_TX;
4277
4278         /* Now service all interrupt bits discovered above. */
4279         if (inta & CSR_INT_BIT_HW_ERR) {
4280                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4281
4282                 /* Tell the device to stop sending interrupts */
4283                 iwl3945_disable_interrupts(priv);
4284
4285                 iwl3945_irq_handle_error(priv);
4286
4287                 handled |= CSR_INT_BIT_HW_ERR;
4288
4289                 spin_unlock_irqrestore(&priv->lock, flags);
4290
4291                 return;
4292         }
4293
4294 #ifdef CONFIG_IWL3945_DEBUG
4295         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4296                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4297                 if (inta & CSR_INT_BIT_SCD)
4298                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4299                                       "the frame/frames.\n");
4300
4301                 /* Alive notification via Rx interrupt will do the real work */
4302                 if (inta & CSR_INT_BIT_ALIVE)
4303                         IWL_DEBUG_ISR("Alive interrupt\n");
4304         }
4305 #endif
4306         /* Safely ignore these bits for debug checks below */
4307         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4308
4309         /* Error detected by uCode */
4310         if (inta & CSR_INT_BIT_SW_ERR) {
4311                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4312                           inta);
4313                 iwl3945_irq_handle_error(priv);
4314                 handled |= CSR_INT_BIT_SW_ERR;
4315         }
4316
4317         /* uCode wakes up after power-down sleep */
4318         if (inta & CSR_INT_BIT_WAKEUP) {
4319                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4320                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4321                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4322                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4323                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4324                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4325                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4326                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4327
4328                 handled |= CSR_INT_BIT_WAKEUP;
4329         }
4330
4331         /* All uCode command responses, including Tx command responses,
4332          * Rx "responses" (frame-received notification), and other
4333          * notifications from uCode come through here*/
4334         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4335                 iwl3945_rx_handle(priv);
4336                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4337         }
4338
4339         if (inta & CSR_INT_BIT_FH_TX) {
4340                 IWL_DEBUG_ISR("Tx interrupt\n");
4341
4342                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4343                 if (!iwl3945_grab_nic_access(priv)) {
4344                         iwl3945_write_direct32(priv,
4345                                              FH_TCSR_CREDIT
4346                                              (ALM_FH_SRVC_CHNL), 0x0);
4347                         iwl3945_release_nic_access(priv);
4348                 }
4349                 handled |= CSR_INT_BIT_FH_TX;
4350         }
4351
4352         if (inta & ~handled)
4353                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4354
4355         if (inta & ~CSR_INI_SET_MASK) {
4356                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4357                          inta & ~CSR_INI_SET_MASK);
4358                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4359         }
4360
4361         /* Re-enable all interrupts */
4362         /* only Re-enable if disabled by irq */
4363         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4364                 iwl3945_enable_interrupts(priv);
4365
4366 #ifdef CONFIG_IWL3945_DEBUG
4367         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4368                 inta = iwl3945_read32(priv, CSR_INT);
4369                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4370                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4371                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4372                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4373         }
4374 #endif
4375         spin_unlock_irqrestore(&priv->lock, flags);
4376 }
4377
4378 static irqreturn_t iwl3945_isr(int irq, void *data)
4379 {
4380         struct iwl3945_priv *priv = data;
4381         u32 inta, inta_mask;
4382         u32 inta_fh;
4383         if (!priv)
4384                 return IRQ_NONE;
4385
4386         spin_lock(&priv->lock);
4387
4388         /* Disable (but don't clear!) interrupts here to avoid
4389          *    back-to-back ISRs and sporadic interrupts from our NIC.
4390          * If we have something to service, the tasklet will re-enable ints.
4391          * If we *don't* have something, we'll re-enable before leaving here. */
4392         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4393         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4394
4395         /* Discover which interrupts are active/pending */
4396         inta = iwl3945_read32(priv, CSR_INT);
4397         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4398
4399         /* Ignore interrupt if there's nothing in NIC to service.
4400          * This may be due to IRQ shared with another device,
4401          * or due to sporadic interrupts thrown from our NIC. */
4402         if (!inta && !inta_fh) {
4403                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4404                 goto none;
4405         }
4406
4407         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4408                 /* Hardware disappeared */
4409                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%08x\n", inta);
4410                 goto unplugged;
4411         }
4412
4413         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4414                       inta, inta_mask, inta_fh);
4415
4416         inta &= ~CSR_INT_BIT_SCD;
4417
4418         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4419         if (likely(inta || inta_fh))
4420                 tasklet_schedule(&priv->irq_tasklet);
4421 unplugged:
4422         spin_unlock(&priv->lock);
4423
4424         return IRQ_HANDLED;
4425
4426  none:
4427         /* re-enable interrupts here since we don't have anything to service. */
4428         /* only Re-enable if disabled by irq */
4429         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4430                 iwl3945_enable_interrupts(priv);
4431         spin_unlock(&priv->lock);
4432         return IRQ_NONE;
4433 }
4434
4435 /************************** EEPROM BANDS ****************************
4436  *
4437  * The iwl3945_eeprom_band definitions below provide the mapping from the
4438  * EEPROM contents to the specific channel number supported for each
4439  * band.
4440  *
4441  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4442  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4443  * The specific geography and calibration information for that channel
4444  * is contained in the eeprom map itself.
4445  *
4446  * During init, we copy the eeprom information and channel map
4447  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4448  *
4449  * channel_map_24/52 provides the index in the channel_info array for a
4450  * given channel.  We have to have two separate maps as there is channel
4451  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4452  * band_2
4453  *
4454  * A value of 0xff stored in the channel_map indicates that the channel
4455  * is not supported by the hardware at all.
4456  *
4457  * A value of 0xfe in the channel_map indicates that the channel is not
4458  * valid for Tx with the current hardware.  This means that
4459  * while the system can tune and receive on a given channel, it may not
4460  * be able to associate or transmit any frames on that
4461  * channel.  There is no corresponding channel information for that
4462  * entry.
4463  *
4464  *********************************************************************/
4465
4466 /* 2.4 GHz */
4467 static const u8 iwl3945_eeprom_band_1[14] = {
4468         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4469 };
4470
4471 /* 5.2 GHz bands */
4472 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4473         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4474 };
4475
4476 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4477         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4478 };
4479
4480 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4481         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4482 };
4483
4484 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4485         145, 149, 153, 157, 161, 165
4486 };
4487
4488 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4489                                     int *eeprom_ch_count,
4490                                     const struct iwl3945_eeprom_channel
4491                                     **eeprom_ch_info,
4492                                     const u8 **eeprom_ch_index)
4493 {
4494         switch (band) {
4495         case 1:         /* 2.4GHz band */
4496                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4497                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4498                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4499                 break;
4500         case 2:         /* 4.9GHz band */
4501                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4502                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4503                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4504                 break;
4505         case 3:         /* 5.2GHz band */
4506                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4507                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4508                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4509                 break;
4510         case 4:         /* 5.5GHz band */
4511                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4512                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4513                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4514                 break;
4515         case 5:         /* 5.7GHz band */
4516                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4517                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4518                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4519                 break;
4520         default:
4521                 BUG();
4522                 return;
4523         }
4524 }
4525
4526 /**
4527  * iwl3945_get_channel_info - Find driver's private channel info
4528  *
4529  * Based on band and channel number.
4530  */
4531 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4532                                                     enum ieee80211_band band, u16 channel)
4533 {
4534         int i;
4535
4536         switch (band) {
4537         case IEEE80211_BAND_5GHZ:
4538                 for (i = 14; i < priv->channel_count; i++) {
4539                         if (priv->channel_info[i].channel == channel)
4540                                 return &priv->channel_info[i];
4541                 }
4542                 break;
4543
4544         case IEEE80211_BAND_2GHZ:
4545                 if (channel >= 1 && channel <= 14)
4546                         return &priv->channel_info[channel - 1];
4547                 break;
4548         case IEEE80211_NUM_BANDS:
4549                 WARN_ON(1);
4550         }
4551
4552         return NULL;
4553 }
4554
4555 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4556                             ? # x " " : "")
4557
4558 /**
4559  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4560  */
4561 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4562 {
4563         int eeprom_ch_count = 0;
4564         const u8 *eeprom_ch_index = NULL;
4565         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4566         int band, ch;
4567         struct iwl3945_channel_info *ch_info;
4568
4569         if (priv->channel_count) {
4570                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4571                 return 0;
4572         }
4573
4574         if (priv->eeprom.version < 0x2f) {
4575                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4576                             priv->eeprom.version);
4577                 return -EINVAL;
4578         }
4579
4580         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4581
4582         priv->channel_count =
4583             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4584             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4585             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4586             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4587             ARRAY_SIZE(iwl3945_eeprom_band_5);
4588
4589         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4590
4591         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4592                                      priv->channel_count, GFP_KERNEL);
4593         if (!priv->channel_info) {
4594                 IWL_ERROR("Could not allocate channel_info\n");
4595                 priv->channel_count = 0;
4596                 return -ENOMEM;
4597         }
4598
4599         ch_info = priv->channel_info;
4600
4601         /* Loop through the 5 EEPROM bands adding them in order to the
4602          * channel map we maintain (that contains additional information than
4603          * what just in the EEPROM) */
4604         for (band = 1; band <= 5; band++) {
4605
4606                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4607                                         &eeprom_ch_info, &eeprom_ch_index);
4608
4609                 /* Loop through each band adding each of the channels */
4610                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4611                         ch_info->channel = eeprom_ch_index[ch];
4612                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4613                             IEEE80211_BAND_5GHZ;
4614
4615                         /* permanently store EEPROM's channel regulatory flags
4616                          *   and max power in channel info database. */
4617                         ch_info->eeprom = eeprom_ch_info[ch];
4618
4619                         /* Copy the run-time flags so they are there even on
4620                          * invalid channels */
4621                         ch_info->flags = eeprom_ch_info[ch].flags;
4622
4623                         if (!(is_channel_valid(ch_info))) {
4624                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4625                                                "No traffic\n",
4626                                                ch_info->channel,
4627                                                ch_info->flags,
4628                                                is_channel_a_band(ch_info) ?
4629                                                "5.2" : "2.4");
4630                                 ch_info++;
4631                                 continue;
4632                         }
4633
4634                         /* Initialize regulatory-based run-time data */
4635                         ch_info->max_power_avg = ch_info->curr_txpow =
4636                             eeprom_ch_info[ch].max_power_avg;
4637                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4638                         ch_info->min_power = 0;
4639
4640                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
4641                                        " %ddBm): Ad-Hoc %ssupported\n",
4642                                        ch_info->channel,
4643                                        is_channel_a_band(ch_info) ?
4644                                        "5.2" : "2.4",
4645                                        CHECK_AND_PRINT(VALID),
4646                                        CHECK_AND_PRINT(IBSS),
4647                                        CHECK_AND_PRINT(ACTIVE),
4648                                        CHECK_AND_PRINT(RADAR),
4649                                        CHECK_AND_PRINT(WIDE),
4650                                        CHECK_AND_PRINT(DFS),
4651                                        eeprom_ch_info[ch].flags,
4652                                        eeprom_ch_info[ch].max_power_avg,
4653                                        ((eeprom_ch_info[ch].
4654                                          flags & EEPROM_CHANNEL_IBSS)
4655                                         && !(eeprom_ch_info[ch].
4656                                              flags & EEPROM_CHANNEL_RADAR))
4657                                        ? "" : "not ");
4658
4659                         /* Set the user_txpower_limit to the highest power
4660                          * supported by any channel */
4661                         if (eeprom_ch_info[ch].max_power_avg >
4662                             priv->user_txpower_limit)
4663                                 priv->user_txpower_limit =
4664                                     eeprom_ch_info[ch].max_power_avg;
4665
4666                         ch_info++;
4667                 }
4668         }
4669
4670         /* Set up txpower settings in driver for all channels */
4671         if (iwl3945_txpower_set_from_eeprom(priv))
4672                 return -EIO;
4673
4674         return 0;
4675 }
4676
4677 /*
4678  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4679  */
4680 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4681 {
4682         kfree(priv->channel_info);
4683         priv->channel_count = 0;
4684 }
4685
4686 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4687  * sending probe req.  This should be set long enough to hear probe responses
4688  * from more than one AP.  */
4689 #define IWL_ACTIVE_DWELL_TIME_24    (30)        /* all times in msec */
4690 #define IWL_ACTIVE_DWELL_TIME_52    (20)
4691
4692 #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
4693 #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
4694
4695 /* For faster active scanning, scan will move to the next channel if fewer than
4696  * PLCP_QUIET_THRESH packets are heard on this channel within
4697  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4698  * time if it's a quiet channel (nothing responded to our probe, and there's
4699  * no other traffic).
4700  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4701 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4702 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(10)  /* msec */
4703
4704 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4705  * Must be set longer than active dwell time.
4706  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4707 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4708 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4709 #define IWL_PASSIVE_DWELL_BASE      (100)
4710 #define IWL_CHANNEL_TUNE_TIME       5
4711
4712 #define IWL_SCAN_PROBE_MASK(n)   (BIT(n) | (BIT(n) - BIT(1)))
4713
4714 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4715                                                 enum ieee80211_band band,
4716                                                 u8 n_probes)
4717 {
4718         if (band == IEEE80211_BAND_5GHZ)
4719                 return IWL_ACTIVE_DWELL_TIME_52 +
4720                         IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
4721         else
4722                 return IWL_ACTIVE_DWELL_TIME_24 +
4723                         IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
4724 }
4725
4726 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4727                                           enum ieee80211_band band)
4728 {
4729         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4730             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4731             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4732
4733         if (iwl3945_is_associated(priv)) {
4734                 /* If we're associated, we clamp the maximum passive
4735                  * dwell time to be 98% of the beacon interval (minus
4736                  * 2 * channel tune time) */
4737                 passive = priv->beacon_int;
4738                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4739                         passive = IWL_PASSIVE_DWELL_BASE;
4740                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4741         }
4742
4743         return passive;
4744 }
4745
4746 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4747                                          enum ieee80211_band band,
4748                                      u8 is_active, u8 n_probes,
4749                                      struct iwl3945_scan_channel *scan_ch)
4750 {
4751         const struct ieee80211_channel *channels = NULL;
4752         const struct ieee80211_supported_band *sband;
4753         const struct iwl3945_channel_info *ch_info;
4754         u16 passive_dwell = 0;
4755         u16 active_dwell = 0;
4756         int added, i;
4757
4758         sband = iwl3945_get_band(priv, band);
4759         if (!sband)
4760                 return 0;
4761
4762         channels = sband->channels;
4763
4764         active_dwell = iwl3945_get_active_dwell_time(priv, band, n_probes);
4765         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4766
4767         if (passive_dwell <= active_dwell)
4768                 passive_dwell = active_dwell + 1;
4769
4770         for (i = 0, added = 0; i < sband->n_channels; i++) {
4771                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4772                         continue;
4773
4774                 scan_ch->channel = channels[i].hw_value;
4775
4776                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4777                 if (!is_channel_valid(ch_info)) {
4778                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
4779                                        scan_ch->channel);
4780                         continue;
4781                 }
4782
4783                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4784                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4785                 /* If passive , set up for auto-switch
4786                  *  and use long active_dwell time.
4787                  */
4788                 if (!is_active || is_channel_passive(ch_info) ||
4789                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
4790                         scan_ch->type = 0;      /* passive */
4791                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
4792                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
4793                 } else {
4794                         scan_ch->type = 1;      /* active */
4795                 }
4796
4797                 /* Set direct probe bits. These may be used both for active
4798                  * scan channels (probes gets sent right away),
4799                  * or for passive channels (probes get se sent only after
4800                  * hearing clear Rx packet).*/
4801                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
4802                         if (n_probes)
4803                                 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4804                 } else {
4805                         /* uCode v1 does not allow setting direct probe bits on
4806                          * passive channel. */
4807                         if ((scan_ch->type & 1) && n_probes)
4808                                 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4809                 }
4810
4811                 /* Set txpower levels to defaults */
4812                 scan_ch->tpc.dsp_atten = 110;
4813                 /* scan_pwr_info->tpc.dsp_atten; */
4814
4815                 /*scan_pwr_info->tpc.tx_gain; */
4816                 if (band == IEEE80211_BAND_5GHZ)
4817                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4818                 else {
4819                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4820                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4821                          * power level:
4822                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4823                          */
4824                 }
4825
4826                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4827                                scan_ch->channel,
4828                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4829                                (scan_ch->type & 1) ?
4830                                active_dwell : passive_dwell);
4831
4832                 scan_ch++;
4833                 added++;
4834         }
4835
4836         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4837         return added;
4838 }
4839
4840 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
4841                               struct ieee80211_rate *rates)
4842 {
4843         int i;
4844
4845         for (i = 0; i < IWL_RATE_COUNT; i++) {
4846                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
4847                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4848                 rates[i].hw_value_short = i;
4849                 rates[i].flags = 0;
4850                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4851                         /*
4852                          * If CCK != 1M then set short preamble rate flag.
4853                          */
4854                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
4855                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4856                 }
4857         }
4858 }
4859
4860 /**
4861  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
4862  */
4863 static int iwl3945_init_geos(struct iwl3945_priv *priv)
4864 {
4865         struct iwl3945_channel_info *ch;
4866         struct ieee80211_supported_band *sband;
4867         struct ieee80211_channel *channels;
4868         struct ieee80211_channel *geo_ch;
4869         struct ieee80211_rate *rates;
4870         int i = 0;
4871
4872         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4873             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4874                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4875                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4876                 return 0;
4877         }
4878
4879         channels = kzalloc(sizeof(struct ieee80211_channel) *
4880                            priv->channel_count, GFP_KERNEL);
4881         if (!channels)
4882                 return -ENOMEM;
4883
4884         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4885                         GFP_KERNEL);
4886         if (!rates) {
4887                 kfree(channels);
4888                 return -ENOMEM;
4889         }
4890
4891         /* 5.2GHz channels start after the 2.4GHz channels */
4892         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4893         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
4894         /* just OFDM */
4895         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4896         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4897
4898         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4899         sband->channels = channels;
4900         /* OFDM & CCK */
4901         sband->bitrates = rates;
4902         sband->n_bitrates = IWL_RATE_COUNT;
4903
4904         priv->ieee_channels = channels;
4905         priv->ieee_rates = rates;
4906
4907         iwl3945_init_hw_rates(priv, rates);
4908
4909         for (i = 0;  i < priv->channel_count; i++) {
4910                 ch = &priv->channel_info[i];
4911
4912                 /* FIXME: might be removed if scan is OK*/
4913                 if (!is_channel_valid(ch))
4914                         continue;
4915
4916                 if (is_channel_a_band(ch))
4917                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4918                 else
4919                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4920
4921                 geo_ch = &sband->channels[sband->n_channels++];
4922
4923                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4924                 geo_ch->max_power = ch->max_power_avg;
4925                 geo_ch->max_antenna_gain = 0xff;
4926                 geo_ch->hw_value = ch->channel;
4927
4928                 if (is_channel_valid(ch)) {
4929                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4930                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4931
4932                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4933                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4934
4935                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4936                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4937
4938                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4939                                 priv->max_channel_txpower_limit =
4940                                     ch->max_power_avg;
4941                 } else {
4942                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4943                 }
4944
4945                 /* Save flags for reg domain usage */
4946                 geo_ch->orig_flags = geo_ch->flags;
4947
4948                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4949                                 ch->channel, geo_ch->center_freq,
4950                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4951                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4952                                 "restricted" : "valid",
4953                                  geo_ch->flags);
4954         }
4955
4956         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4957              priv->cfg->sku & IWL_SKU_A) {
4958                 printk(KERN_INFO DRV_NAME
4959                        ": Incorrectly detected BG card as ABG.  Please send "
4960                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4961                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4962                  priv->cfg->sku &= ~IWL_SKU_A;
4963         }
4964
4965         printk(KERN_INFO DRV_NAME
4966                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4967                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4968                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4969
4970         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4971                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4972                         &priv->bands[IEEE80211_BAND_2GHZ];
4973         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4974                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4975                         &priv->bands[IEEE80211_BAND_5GHZ];
4976
4977         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4978
4979         return 0;
4980 }
4981
4982 /*
4983  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
4984  */
4985 static void iwl3945_free_geos(struct iwl3945_priv *priv)
4986 {
4987         kfree(priv->ieee_channels);
4988         kfree(priv->ieee_rates);
4989         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4990 }
4991
4992 /******************************************************************************
4993  *
4994  * uCode download functions
4995  *
4996  ******************************************************************************/
4997
4998 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
4999 {
5000         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5001         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5002         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5003         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5004         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5005         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5006 }
5007
5008 /**
5009  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5010  *     looking at all data.
5011  */
5012 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 *image, u32 len)
5013 {
5014         u32 val;
5015         u32 save_len = len;
5016         int rc = 0;
5017         u32 errcnt;
5018
5019         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5020
5021         rc = iwl3945_grab_nic_access(priv);
5022         if (rc)
5023                 return rc;
5024
5025         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5026
5027         errcnt = 0;
5028         for (; len > 0; len -= sizeof(u32), image++) {
5029                 /* read data comes through single port, auto-incr addr */
5030                 /* NOTE: Use the debugless read so we don't flood kernel log
5031                  * if IWL_DL_IO is set */
5032                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5033                 if (val != le32_to_cpu(*image)) {
5034                         IWL_ERROR("uCode INST section is invalid at "
5035                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5036                                   save_len - len, val, le32_to_cpu(*image));
5037                         rc = -EIO;
5038                         errcnt++;
5039                         if (errcnt >= 20)
5040                                 break;
5041                 }
5042         }
5043
5044         iwl3945_release_nic_access(priv);
5045
5046         if (!errcnt)
5047                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5048
5049         return rc;
5050 }
5051
5052
5053 /**
5054  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5055  *   using sample data 100 bytes apart.  If these sample points are good,
5056  *   it's a pretty good bet that everything between them is good, too.
5057  */
5058 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5059 {
5060         u32 val;
5061         int rc = 0;
5062         u32 errcnt = 0;
5063         u32 i;
5064
5065         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5066
5067         rc = iwl3945_grab_nic_access(priv);
5068         if (rc)
5069                 return rc;
5070
5071         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5072                 /* read data comes through single port, auto-incr addr */
5073                 /* NOTE: Use the debugless read so we don't flood kernel log
5074                  * if IWL_DL_IO is set */
5075                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5076                         i + RTC_INST_LOWER_BOUND);
5077                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5078                 if (val != le32_to_cpu(*image)) {
5079 #if 0 /* Enable this if you want to see details */
5080                         IWL_ERROR("uCode INST section is invalid at "
5081                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5082                                   i, val, *image);
5083 #endif
5084                         rc = -EIO;
5085                         errcnt++;
5086                         if (errcnt >= 3)
5087                                 break;
5088                 }
5089         }
5090
5091         iwl3945_release_nic_access(priv);
5092
5093         return rc;
5094 }
5095
5096
5097 /**
5098  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5099  *    and verify its contents
5100  */
5101 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5102 {
5103         __le32 *image;
5104         u32 len;
5105         int rc = 0;
5106
5107         /* Try bootstrap */
5108         image = (__le32 *)priv->ucode_boot.v_addr;
5109         len = priv->ucode_boot.len;
5110         rc = iwl3945_verify_inst_sparse(priv, image, len);
5111         if (rc == 0) {
5112                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5113                 return 0;
5114         }
5115
5116         /* Try initialize */
5117         image = (__le32 *)priv->ucode_init.v_addr;
5118         len = priv->ucode_init.len;
5119         rc = iwl3945_verify_inst_sparse(priv, image, len);
5120         if (rc == 0) {
5121                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5122                 return 0;
5123         }
5124
5125         /* Try runtime/protocol */
5126         image = (__le32 *)priv->ucode_code.v_addr;
5127         len = priv->ucode_code.len;
5128         rc = iwl3945_verify_inst_sparse(priv, image, len);
5129         if (rc == 0) {
5130                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5131                 return 0;
5132         }
5133
5134         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5135
5136         /* Since nothing seems to match, show first several data entries in
5137          * instruction SRAM, so maybe visual inspection will give a clue.
5138          * Selection of bootstrap image (vs. other images) is arbitrary. */
5139         image = (__le32 *)priv->ucode_boot.v_addr;
5140         len = priv->ucode_boot.len;
5141         rc = iwl3945_verify_inst_full(priv, image, len);
5142
5143         return rc;
5144 }
5145
5146
5147 /* check contents of special bootstrap uCode SRAM */
5148 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5149 {
5150         __le32 *image = priv->ucode_boot.v_addr;
5151         u32 len = priv->ucode_boot.len;
5152         u32 reg;
5153         u32 val;
5154
5155         IWL_DEBUG_INFO("Begin verify bsm\n");
5156
5157         /* verify BSM SRAM contents */
5158         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5159         for (reg = BSM_SRAM_LOWER_BOUND;
5160              reg < BSM_SRAM_LOWER_BOUND + len;
5161              reg += sizeof(u32), image++) {
5162                 val = iwl3945_read_prph(priv, reg);
5163                 if (val != le32_to_cpu(*image)) {
5164                         IWL_ERROR("BSM uCode verification failed at "
5165                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5166                                   BSM_SRAM_LOWER_BOUND,
5167                                   reg - BSM_SRAM_LOWER_BOUND, len,
5168                                   val, le32_to_cpu(*image));
5169                         return -EIO;
5170                 }
5171         }
5172
5173         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5174
5175         return 0;
5176 }
5177
5178 /**
5179  * iwl3945_load_bsm - Load bootstrap instructions
5180  *
5181  * BSM operation:
5182  *
5183  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5184  * in special SRAM that does not power down during RFKILL.  When powering back
5185  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5186  * the bootstrap program into the on-board processor, and starts it.
5187  *
5188  * The bootstrap program loads (via DMA) instructions and data for a new
5189  * program from host DRAM locations indicated by the host driver in the
5190  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5191  * automatically.
5192  *
5193  * When initializing the NIC, the host driver points the BSM to the
5194  * "initialize" uCode image.  This uCode sets up some internal data, then
5195  * notifies host via "initialize alive" that it is complete.
5196  *
5197  * The host then replaces the BSM_DRAM_* pointer values to point to the
5198  * normal runtime uCode instructions and a backup uCode data cache buffer
5199  * (filled initially with starting data values for the on-board processor),
5200  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5201  * which begins normal operation.
5202  *
5203  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5204  * the backup data cache in DRAM before SRAM is powered down.
5205  *
5206  * When powering back up, the BSM loads the bootstrap program.  This reloads
5207  * the runtime uCode instructions and the backup data cache into SRAM,
5208  * and re-launches the runtime uCode from where it left off.
5209  */
5210 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5211 {
5212         __le32 *image = priv->ucode_boot.v_addr;
5213         u32 len = priv->ucode_boot.len;
5214         dma_addr_t pinst;
5215         dma_addr_t pdata;
5216         u32 inst_len;
5217         u32 data_len;
5218         int rc;
5219         int i;
5220         u32 done;
5221         u32 reg_offset;
5222
5223         IWL_DEBUG_INFO("Begin load bsm\n");
5224
5225         /* make sure bootstrap program is no larger than BSM's SRAM size */
5226         if (len > IWL_MAX_BSM_SIZE)
5227                 return -EINVAL;
5228
5229         /* Tell bootstrap uCode where to find the "Initialize" uCode
5230          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5231          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5232          *        after the "initialize" uCode has run, to point to
5233          *        runtime/protocol instructions and backup data cache. */
5234         pinst = priv->ucode_init.p_addr;
5235         pdata = priv->ucode_init_data.p_addr;
5236         inst_len = priv->ucode_init.len;
5237         data_len = priv->ucode_init_data.len;
5238
5239         rc = iwl3945_grab_nic_access(priv);
5240         if (rc)
5241                 return rc;
5242
5243         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5244         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5245         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5246         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5247
5248         /* Fill BSM memory with bootstrap instructions */
5249         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5250              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5251              reg_offset += sizeof(u32), image++)
5252                 _iwl3945_write_prph(priv, reg_offset,
5253                                           le32_to_cpu(*image));
5254
5255         rc = iwl3945_verify_bsm(priv);
5256         if (rc) {
5257                 iwl3945_release_nic_access(priv);
5258                 return rc;
5259         }
5260
5261         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5262         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5263         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5264                                  RTC_INST_LOWER_BOUND);
5265         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5266
5267         /* Load bootstrap code into instruction SRAM now,
5268          *   to prepare to load "initialize" uCode */
5269         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5270                 BSM_WR_CTRL_REG_BIT_START);
5271
5272         /* Wait for load of bootstrap uCode to finish */
5273         for (i = 0; i < 100; i++) {
5274                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5275                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5276                         break;
5277                 udelay(10);
5278         }
5279         if (i < 100)
5280                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5281         else {
5282                 IWL_ERROR("BSM write did not complete!\n");
5283                 return -EIO;
5284         }
5285
5286         /* Enable future boot loads whenever power management unit triggers it
5287          *   (e.g. when powering back up after power-save shutdown) */
5288         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5289                 BSM_WR_CTRL_REG_BIT_START_EN);
5290
5291         iwl3945_release_nic_access(priv);
5292
5293         return 0;
5294 }
5295
5296 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5297 {
5298         /* Remove all resets to allow NIC to operate */
5299         iwl3945_write32(priv, CSR_RESET, 0);
5300 }
5301
5302 /**
5303  * iwl3945_read_ucode - Read uCode images from disk file.
5304  *
5305  * Copy into buffers for card to fetch via bus-mastering
5306  */
5307 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5308 {
5309         struct iwl3945_ucode *ucode;
5310         int ret = -EINVAL, index;
5311         const struct firmware *ucode_raw;
5312         /* firmware file name contains uCode/driver compatibility version */
5313         const char *name_pre = priv->cfg->fw_name_pre;
5314         const unsigned int api_max = priv->cfg->ucode_api_max;
5315         const unsigned int api_min = priv->cfg->ucode_api_min;
5316         char buf[25];
5317         u8 *src;
5318         size_t len;
5319         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
5320
5321         /* Ask kernel firmware_class module to get the boot firmware off disk.
5322          * request_firmware() is synchronous, file is in memory on return. */
5323         for (index = api_max; index >= api_min; index--) {
5324                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
5325                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
5326                 if (ret < 0) {
5327                         IWL_ERROR("%s firmware file req failed: Reason %d\n",
5328                                   buf, ret);
5329                         if (ret == -ENOENT)
5330                                 continue;
5331                         else
5332                                 goto error;
5333                 } else {
5334                         if (index < api_max)
5335                                 IWL_ERROR("Loaded firmware %s, which is deprecated. Please use API v%u instead.\n",
5336                                           buf, api_max);
5337                         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5338                                        buf, ucode_raw->size);
5339                         break;
5340                 }
5341         }
5342
5343         if (ret < 0)
5344                 goto error;
5345
5346         /* Make sure that we got at least our header! */
5347         if (ucode_raw->size < sizeof(*ucode)) {
5348                 IWL_ERROR("File size way too small!\n");
5349                 ret = -EINVAL;
5350                 goto err_release;
5351         }
5352
5353         /* Data from ucode file:  header followed by uCode images */
5354         ucode = (void *)ucode_raw->data;
5355
5356         priv->ucode_ver = le32_to_cpu(ucode->ver);
5357         api_ver = IWL_UCODE_API(priv->ucode_ver);
5358         inst_size = le32_to_cpu(ucode->inst_size);
5359         data_size = le32_to_cpu(ucode->data_size);
5360         init_size = le32_to_cpu(ucode->init_size);
5361         init_data_size = le32_to_cpu(ucode->init_data_size);
5362         boot_size = le32_to_cpu(ucode->boot_size);
5363
5364         /* api_ver should match the api version forming part of the
5365          * firmware filename ... but we don't check for that and only rely
5366          * on the API version read from firware header from here on forward */
5367
5368         if (api_ver < api_min || api_ver > api_max) {
5369                 IWL_ERROR("Driver unable to support your firmware API. "
5370                           "Driver supports v%u, firmware is v%u.\n",
5371                           api_max, api_ver);
5372                 priv->ucode_ver = 0;
5373                 ret = -EINVAL;
5374                 goto err_release;
5375         }
5376         if (api_ver != api_max)
5377                 IWL_ERROR("Firmware has old API version. Expected %u, "
5378                           "got %u. New firmware can be obtained "
5379                           "from http://www.intellinuxwireless.org.\n",
5380                           api_max, api_ver);
5381
5382         printk(KERN_INFO DRV_NAME " loaded firmware version %u.%u.%u.%u\n",
5383                        IWL_UCODE_MAJOR(priv->ucode_ver),
5384                        IWL_UCODE_MINOR(priv->ucode_ver),
5385                        IWL_UCODE_API(priv->ucode_ver),
5386                        IWL_UCODE_SERIAL(priv->ucode_ver));
5387         IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
5388                        priv->ucode_ver);
5389         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5390         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5391         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5392         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5393         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5394
5395
5396         /* Verify size of file vs. image size info in file's header */
5397         if (ucode_raw->size < sizeof(*ucode) +
5398                 inst_size + data_size + init_size +
5399                 init_data_size + boot_size) {
5400
5401                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5402                                (int)ucode_raw->size);
5403                 ret = -EINVAL;
5404                 goto err_release;
5405         }
5406
5407         /* Verify that uCode images will fit in card's SRAM */
5408         if (inst_size > IWL_MAX_INST_SIZE) {
5409                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5410                                inst_size);
5411                 ret = -EINVAL;
5412                 goto err_release;
5413         }
5414
5415         if (data_size > IWL_MAX_DATA_SIZE) {
5416                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5417                                data_size);
5418                 ret = -EINVAL;
5419                 goto err_release;
5420         }
5421         if (init_size > IWL_MAX_INST_SIZE) {
5422                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5423                                 init_size);
5424                 ret = -EINVAL;
5425                 goto err_release;
5426         }
5427         if (init_data_size > IWL_MAX_DATA_SIZE) {
5428                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5429                                 init_data_size);
5430                 ret = -EINVAL;
5431                 goto err_release;
5432         }
5433         if (boot_size > IWL_MAX_BSM_SIZE) {
5434                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5435                                 boot_size);
5436                 ret = -EINVAL;
5437                 goto err_release;
5438         }
5439
5440         /* Allocate ucode buffers for card's bus-master loading ... */
5441
5442         /* Runtime instructions and 2 copies of data:
5443          * 1) unmodified from disk
5444          * 2) backup cache for save/restore during power-downs */
5445         priv->ucode_code.len = inst_size;
5446         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5447
5448         priv->ucode_data.len = data_size;
5449         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5450
5451         priv->ucode_data_backup.len = data_size;
5452         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5453
5454         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5455             !priv->ucode_data_backup.v_addr)
5456                 goto err_pci_alloc;
5457
5458         /* Initialization instructions and data */
5459         if (init_size && init_data_size) {
5460                 priv->ucode_init.len = init_size;
5461                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5462
5463                 priv->ucode_init_data.len = init_data_size;
5464                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5465
5466                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5467                         goto err_pci_alloc;
5468         }
5469
5470         /* Bootstrap (instructions only, no data) */
5471         if (boot_size) {
5472                 priv->ucode_boot.len = boot_size;
5473                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5474
5475                 if (!priv->ucode_boot.v_addr)
5476                         goto err_pci_alloc;
5477         }
5478
5479         /* Copy images into buffers for card's bus-master reads ... */
5480
5481         /* Runtime instructions (first block of data in file) */
5482         src = &ucode->data[0];
5483         len = priv->ucode_code.len;
5484         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5485         memcpy(priv->ucode_code.v_addr, src, len);
5486         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5487                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5488
5489         /* Runtime data (2nd block)
5490          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5491         src = &ucode->data[inst_size];
5492         len = priv->ucode_data.len;
5493         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5494         memcpy(priv->ucode_data.v_addr, src, len);
5495         memcpy(priv->ucode_data_backup.v_addr, src, len);
5496
5497         /* Initialization instructions (3rd block) */
5498         if (init_size) {
5499                 src = &ucode->data[inst_size + data_size];
5500                 len = priv->ucode_init.len;
5501                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5502                                len);
5503                 memcpy(priv->ucode_init.v_addr, src, len);
5504         }
5505
5506         /* Initialization data (4th block) */
5507         if (init_data_size) {
5508                 src = &ucode->data[inst_size + data_size + init_size];
5509                 len = priv->ucode_init_data.len;
5510                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5511                                (int)len);
5512                 memcpy(priv->ucode_init_data.v_addr, src, len);
5513         }
5514
5515         /* Bootstrap instructions (5th block) */
5516         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5517         len = priv->ucode_boot.len;
5518         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5519                        (int)len);
5520         memcpy(priv->ucode_boot.v_addr, src, len);
5521
5522         /* We have our copies now, allow OS release its copies */
5523         release_firmware(ucode_raw);
5524         return 0;
5525
5526  err_pci_alloc:
5527         IWL_ERROR("failed to allocate pci memory\n");
5528         ret = -ENOMEM;
5529         iwl3945_dealloc_ucode_pci(priv);
5530
5531  err_release:
5532         release_firmware(ucode_raw);
5533
5534  error:
5535         return ret;
5536 }
5537
5538
5539 /**
5540  * iwl3945_set_ucode_ptrs - Set uCode address location
5541  *
5542  * Tell initialization uCode where to find runtime uCode.
5543  *
5544  * BSM registers initially contain pointers to initialization uCode.
5545  * We need to replace them to load runtime uCode inst and data,
5546  * and to save runtime data when powering down.
5547  */
5548 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5549 {
5550         dma_addr_t pinst;
5551         dma_addr_t pdata;
5552         int rc = 0;
5553         unsigned long flags;
5554
5555         /* bits 31:0 for 3945 */
5556         pinst = priv->ucode_code.p_addr;
5557         pdata = priv->ucode_data_backup.p_addr;
5558
5559         spin_lock_irqsave(&priv->lock, flags);
5560         rc = iwl3945_grab_nic_access(priv);
5561         if (rc) {
5562                 spin_unlock_irqrestore(&priv->lock, flags);
5563                 return rc;
5564         }
5565
5566         /* Tell bootstrap uCode where to find image to load */
5567         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5568         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5569         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5570                                  priv->ucode_data.len);
5571
5572         /* Inst byte count must be last to set up, bit 31 signals uCode
5573          *   that all new ptr/size info is in place */
5574         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5575                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5576
5577         iwl3945_release_nic_access(priv);
5578
5579         spin_unlock_irqrestore(&priv->lock, flags);
5580
5581         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5582
5583         return rc;
5584 }
5585
5586 /**
5587  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5588  *
5589  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5590  *
5591  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5592  */
5593 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5594 {
5595         /* Check alive response for "valid" sign from uCode */
5596         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5597                 /* We had an error bringing up the hardware, so take it
5598                  * all the way back down so we can try again */
5599                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5600                 goto restart;
5601         }
5602
5603         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5604          * This is a paranoid check, because we would not have gotten the
5605          * "initialize" alive if code weren't properly loaded.  */
5606         if (iwl3945_verify_ucode(priv)) {
5607                 /* Runtime instruction load was bad;
5608                  * take it all the way back down so we can try again */
5609                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5610                 goto restart;
5611         }
5612
5613         /* Send pointers to protocol/runtime uCode image ... init code will
5614          * load and launch runtime uCode, which will send us another "Alive"
5615          * notification. */
5616         IWL_DEBUG_INFO("Initialization Alive received.\n");
5617         if (iwl3945_set_ucode_ptrs(priv)) {
5618                 /* Runtime instruction load won't happen;
5619                  * take it all the way back down so we can try again */
5620                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5621                 goto restart;
5622         }
5623         return;
5624
5625  restart:
5626         queue_work(priv->workqueue, &priv->restart);
5627 }
5628
5629
5630 /* temporary */
5631 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw,
5632                                      struct sk_buff *skb);
5633
5634 /**
5635  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5636  *                   from protocol/runtime uCode (initialization uCode's
5637  *                   Alive gets handled by iwl3945_init_alive_start()).
5638  */
5639 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5640 {
5641         int rc = 0;
5642         int thermal_spin = 0;
5643         u32 rfkill;
5644
5645         IWL_DEBUG_INFO("Runtime Alive received.\n");
5646
5647         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5648                 /* We had an error bringing up the hardware, so take it
5649                  * all the way back down so we can try again */
5650                 IWL_DEBUG_INFO("Alive failed.\n");
5651                 goto restart;
5652         }
5653
5654         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5655          * This is a paranoid check, because we would not have gotten the
5656          * "runtime" alive if code weren't properly loaded.  */
5657         if (iwl3945_verify_ucode(priv)) {
5658                 /* Runtime instruction load was bad;
5659                  * take it all the way back down so we can try again */
5660                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5661                 goto restart;
5662         }
5663
5664         iwl3945_clear_stations_table(priv);
5665
5666         rc = iwl3945_grab_nic_access(priv);
5667         if (rc) {
5668                 IWL_WARNING("Can not read RFKILL status from adapter\n");
5669                 return;
5670         }
5671
5672         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5673         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5674         iwl3945_release_nic_access(priv);
5675
5676         if (rfkill & 0x1) {
5677                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5678                 /* if RFKILL is not on, then wait for thermal
5679                  * sensor in adapter to kick in */
5680                 while (iwl3945_hw_get_temperature(priv) == 0) {
5681                         thermal_spin++;
5682                         udelay(10);
5683                 }
5684
5685                 if (thermal_spin)
5686                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5687                                        thermal_spin * 10);
5688         } else
5689                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5690
5691         /* After the ALIVE response, we can send commands to 3945 uCode */
5692         set_bit(STATUS_ALIVE, &priv->status);
5693
5694         /* Clear out the uCode error bit if it is set */
5695         clear_bit(STATUS_FW_ERROR, &priv->status);
5696
5697         if (iwl3945_is_rfkill(priv))
5698                 return;
5699
5700         ieee80211_wake_queues(priv->hw);
5701
5702         priv->active_rate = priv->rates_mask;
5703         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5704
5705         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5706
5707         if (iwl3945_is_associated(priv)) {
5708                 struct iwl3945_rxon_cmd *active_rxon =
5709                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5710
5711                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5712                        sizeof(priv->staging_rxon));
5713                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5714         } else {
5715                 /* Initialize our rx_config data */
5716                 iwl3945_connection_init_rx_config(priv, priv->iw_mode);
5717                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5718         }
5719
5720         /* Configure Bluetooth device coexistence support */
5721         iwl3945_send_bt_config(priv);
5722
5723         /* Configure the adapter for unassociated operation */
5724         iwl3945_commit_rxon(priv);
5725
5726         iwl3945_reg_txpower_periodic(priv);
5727
5728         iwl3945_led_register(priv);
5729
5730         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5731         set_bit(STATUS_READY, &priv->status);
5732         wake_up_interruptible(&priv->wait_command_queue);
5733
5734         if (priv->error_recovering)
5735                 iwl3945_error_recovery(priv);
5736
5737         /* reassociate for ADHOC mode */
5738         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
5739                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
5740                                                                 priv->vif);
5741                 if (beacon)
5742                         iwl3945_mac_beacon_update(priv->hw, beacon);
5743         }
5744
5745         return;
5746
5747  restart:
5748         queue_work(priv->workqueue, &priv->restart);
5749 }
5750
5751 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5752
5753 static void __iwl3945_down(struct iwl3945_priv *priv)
5754 {
5755         unsigned long flags;
5756         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5757         struct ieee80211_conf *conf = NULL;
5758
5759         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5760
5761         conf = ieee80211_get_hw_conf(priv->hw);
5762
5763         if (!exit_pending)
5764                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5765
5766         iwl3945_led_unregister(priv);
5767         iwl3945_clear_stations_table(priv);
5768
5769         /* Unblock any waiting calls */
5770         wake_up_interruptible_all(&priv->wait_command_queue);
5771
5772         /* Wipe out the EXIT_PENDING status bit if we are not actually
5773          * exiting the module */
5774         if (!exit_pending)
5775                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5776
5777         /* stop and reset the on-board processor */
5778         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5779
5780         /* tell the device to stop sending interrupts */
5781         spin_lock_irqsave(&priv->lock, flags);
5782         iwl3945_disable_interrupts(priv);
5783         spin_unlock_irqrestore(&priv->lock, flags);
5784         iwl_synchronize_irq(priv);
5785
5786         if (priv->mac80211_registered)
5787                 ieee80211_stop_queues(priv->hw);
5788
5789         /* If we have not previously called iwl3945_init() then
5790          * clear all bits but the RF Kill and SUSPEND bits and return */
5791         if (!iwl3945_is_init(priv)) {
5792                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5793                                         STATUS_RF_KILL_HW |
5794                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5795                                         STATUS_RF_KILL_SW |
5796                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5797                                         STATUS_GEO_CONFIGURED |
5798                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5799                                         STATUS_IN_SUSPEND |
5800                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5801                                         STATUS_EXIT_PENDING;
5802                 goto exit;
5803         }
5804
5805         /* ...otherwise clear out all the status bits but the RF Kill and
5806          * SUSPEND bits and continue taking the NIC down. */
5807         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5808                                 STATUS_RF_KILL_HW |
5809                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5810                                 STATUS_RF_KILL_SW |
5811                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5812                                 STATUS_GEO_CONFIGURED |
5813                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5814                                 STATUS_IN_SUSPEND |
5815                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5816                                 STATUS_FW_ERROR |
5817                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5818                                 STATUS_EXIT_PENDING;
5819
5820         spin_lock_irqsave(&priv->lock, flags);
5821         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5822         spin_unlock_irqrestore(&priv->lock, flags);
5823
5824         iwl3945_hw_txq_ctx_stop(priv);
5825         iwl3945_hw_rxq_stop(priv);
5826
5827         spin_lock_irqsave(&priv->lock, flags);
5828         if (!iwl3945_grab_nic_access(priv)) {
5829                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5830                                          APMG_CLK_VAL_DMA_CLK_RQT);
5831                 iwl3945_release_nic_access(priv);
5832         }
5833         spin_unlock_irqrestore(&priv->lock, flags);
5834
5835         udelay(5);
5836
5837         iwl3945_hw_nic_stop_master(priv);
5838         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5839         iwl3945_hw_nic_reset(priv);
5840
5841  exit:
5842         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5843
5844         if (priv->ibss_beacon)
5845                 dev_kfree_skb(priv->ibss_beacon);
5846         priv->ibss_beacon = NULL;
5847
5848         /* clear out any free frames */
5849         iwl3945_clear_free_frames(priv);
5850 }
5851
5852 static void iwl3945_down(struct iwl3945_priv *priv)
5853 {
5854         mutex_lock(&priv->mutex);
5855         __iwl3945_down(priv);
5856         mutex_unlock(&priv->mutex);
5857
5858         iwl3945_cancel_deferred_work(priv);
5859 }
5860
5861 #define MAX_HW_RESTARTS 5
5862
5863 static int __iwl3945_up(struct iwl3945_priv *priv)
5864 {
5865         int rc, i;
5866
5867         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5868                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5869                 return -EIO;
5870         }
5871
5872         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5873                 IWL_WARNING("Radio disabled by SW RF kill (module "
5874                             "parameter)\n");
5875                 return -ENODEV;
5876         }
5877
5878         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5879                 IWL_ERROR("ucode not available for device bring up\n");
5880                 return -EIO;
5881         }
5882
5883         /* If platform's RF_KILL switch is NOT set to KILL */
5884         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
5885                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5886                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5887         else {
5888                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5889                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5890                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5891                         return -ENODEV;
5892                 }
5893         }
5894
5895         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5896
5897         rc = iwl3945_hw_nic_init(priv);
5898         if (rc) {
5899                 IWL_ERROR("Unable to int nic\n");
5900                 return rc;
5901         }
5902
5903         /* make sure rfkill handshake bits are cleared */
5904         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5905         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5906                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5907
5908         /* clear (again), then enable host interrupts */
5909         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5910         iwl3945_enable_interrupts(priv);
5911
5912         /* really make sure rfkill handshake bits are cleared */
5913         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5914         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5915
5916         /* Copy original ucode data image from disk into backup cache.
5917          * This will be used to initialize the on-board processor's
5918          * data SRAM for a clean start when the runtime program first loads. */
5919         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5920                priv->ucode_data.len);
5921
5922         /* We return success when we resume from suspend and rf_kill is on. */
5923         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5924                 return 0;
5925
5926         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5927
5928                 iwl3945_clear_stations_table(priv);
5929
5930                 /* load bootstrap state machine,
5931                  * load bootstrap program into processor's memory,
5932                  * prepare to load the "initialize" uCode */
5933                 rc = iwl3945_load_bsm(priv);
5934
5935                 if (rc) {
5936                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
5937                         continue;
5938                 }
5939
5940                 /* start card; "initialize" will load runtime ucode */
5941                 iwl3945_nic_start(priv);
5942
5943                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5944
5945                 return 0;
5946         }
5947
5948         set_bit(STATUS_EXIT_PENDING, &priv->status);
5949         __iwl3945_down(priv);
5950         clear_bit(STATUS_EXIT_PENDING, &priv->status);
5951
5952         /* tried to restart and config the device for as long as our
5953          * patience could withstand */
5954         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5955         return -EIO;
5956 }
5957
5958
5959 /*****************************************************************************
5960  *
5961  * Workqueue callbacks
5962  *
5963  *****************************************************************************/
5964
5965 static void iwl3945_bg_init_alive_start(struct work_struct *data)
5966 {
5967         struct iwl3945_priv *priv =
5968             container_of(data, struct iwl3945_priv, init_alive_start.work);
5969
5970         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5971                 return;
5972
5973         mutex_lock(&priv->mutex);
5974         iwl3945_init_alive_start(priv);
5975         mutex_unlock(&priv->mutex);
5976 }
5977
5978 static void iwl3945_bg_alive_start(struct work_struct *data)
5979 {
5980         struct iwl3945_priv *priv =
5981             container_of(data, struct iwl3945_priv, alive_start.work);
5982
5983         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5984                 return;
5985
5986         mutex_lock(&priv->mutex);
5987         iwl3945_alive_start(priv);
5988         mutex_unlock(&priv->mutex);
5989 }
5990
5991 static void iwl3945_bg_rf_kill(struct work_struct *work)
5992 {
5993         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
5994
5995         wake_up_interruptible(&priv->wait_command_queue);
5996
5997         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5998                 return;
5999
6000         mutex_lock(&priv->mutex);
6001
6002         if (!iwl3945_is_rfkill(priv)) {
6003                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6004                           "HW and/or SW RF Kill no longer active, restarting "
6005                           "device\n");
6006                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6007                         queue_work(priv->workqueue, &priv->restart);
6008         } else {
6009
6010                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6011                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6012                                           "disabled by SW switch\n");
6013                 else
6014                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6015                                     "Kill switch must be turned off for "
6016                                     "wireless networking to work.\n");
6017         }
6018
6019         mutex_unlock(&priv->mutex);
6020         iwl3945_rfkill_set_hw_state(priv);
6021 }
6022
6023 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6024
6025 static void iwl3945_bg_scan_check(struct work_struct *data)
6026 {
6027         struct iwl3945_priv *priv =
6028             container_of(data, struct iwl3945_priv, scan_check.work);
6029
6030         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6031                 return;
6032
6033         mutex_lock(&priv->mutex);
6034         if (test_bit(STATUS_SCANNING, &priv->status) ||
6035             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6036                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6037                           "Scan completion watchdog resetting adapter (%dms)\n",
6038                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6039
6040                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6041                         iwl3945_send_scan_abort(priv);
6042         }
6043         mutex_unlock(&priv->mutex);
6044 }
6045
6046 static void iwl3945_bg_request_scan(struct work_struct *data)
6047 {
6048         struct iwl3945_priv *priv =
6049             container_of(data, struct iwl3945_priv, request_scan);
6050         struct iwl3945_host_cmd cmd = {
6051                 .id = REPLY_SCAN_CMD,
6052                 .len = sizeof(struct iwl3945_scan_cmd),
6053                 .meta.flags = CMD_SIZE_HUGE,
6054         };
6055         int rc = 0;
6056         struct iwl3945_scan_cmd *scan;
6057         struct ieee80211_conf *conf = NULL;
6058         u8 n_probes = 2;
6059         enum ieee80211_band band;
6060         DECLARE_SSID_BUF(ssid);
6061
6062         conf = ieee80211_get_hw_conf(priv->hw);
6063
6064         mutex_lock(&priv->mutex);
6065
6066         if (!iwl3945_is_ready(priv)) {
6067                 IWL_WARNING("request scan called when driver not ready.\n");
6068                 goto done;
6069         }
6070
6071         /* Make sure the scan wasn't canceled before this queued work
6072          * was given the chance to run... */
6073         if (!test_bit(STATUS_SCANNING, &priv->status))
6074                 goto done;
6075
6076         /* This should never be called or scheduled if there is currently
6077          * a scan active in the hardware. */
6078         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6079                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6080                                "Ignoring second request.\n");
6081                 rc = -EIO;
6082                 goto done;
6083         }
6084
6085         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6086                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6087                 goto done;
6088         }
6089
6090         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6091                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6092                 goto done;
6093         }
6094
6095         if (iwl3945_is_rfkill(priv)) {
6096                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6097                 goto done;
6098         }
6099
6100         if (!test_bit(STATUS_READY, &priv->status)) {
6101                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6102                 goto done;
6103         }
6104
6105         if (!priv->scan_bands) {
6106                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6107                 goto done;
6108         }
6109
6110         if (!priv->scan) {
6111                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6112                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6113                 if (!priv->scan) {
6114                         rc = -ENOMEM;
6115                         goto done;
6116                 }
6117         }
6118         scan = priv->scan;
6119         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6120
6121         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6122         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6123
6124         if (iwl3945_is_associated(priv)) {
6125                 u16 interval = 0;
6126                 u32 extra;
6127                 u32 suspend_time = 100;
6128                 u32 scan_suspend_time = 100;
6129                 unsigned long flags;
6130
6131                 IWL_DEBUG_INFO("Scanning while associated...\n");
6132
6133                 spin_lock_irqsave(&priv->lock, flags);
6134                 interval = priv->beacon_int;
6135                 spin_unlock_irqrestore(&priv->lock, flags);
6136
6137                 scan->suspend_time = 0;
6138                 scan->max_out_time = cpu_to_le32(200 * 1024);
6139                 if (!interval)
6140                         interval = suspend_time;
6141                 /*
6142                  * suspend time format:
6143                  *  0-19: beacon interval in usec (time before exec.)
6144                  * 20-23: 0
6145                  * 24-31: number of beacons (suspend between channels)
6146                  */
6147
6148                 extra = (suspend_time / interval) << 24;
6149                 scan_suspend_time = 0xFF0FFFFF &
6150                     (extra | ((suspend_time % interval) * 1024));
6151
6152                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6153                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6154                                scan_suspend_time, interval);
6155         }
6156
6157         /* We should add the ability for user to lock to PASSIVE ONLY */
6158         if (priv->one_direct_scan) {
6159                 IWL_DEBUG_SCAN
6160                     ("Kicking off one direct scan for '%s'\n",
6161                      print_ssid(ssid, priv->direct_ssid,
6162                                 priv->direct_ssid_len));
6163                 scan->direct_scan[0].id = WLAN_EID_SSID;
6164                 scan->direct_scan[0].len = priv->direct_ssid_len;
6165                 memcpy(scan->direct_scan[0].ssid,
6166                        priv->direct_ssid, priv->direct_ssid_len);
6167                 n_probes++;
6168         } else
6169                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6170
6171         /* We don't build a direct scan probe request; the uCode will do
6172          * that based on the direct_mask added to each channel entry */
6173         scan->tx_cmd.len = cpu_to_le16(
6174                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6175                         IWL_MAX_SCAN_SIZE - sizeof(*scan)));
6176         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6177         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6178         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6179
6180         /* flags + rate selection */
6181
6182         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
6183                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6184                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6185                 scan->good_CRC_th = 0;
6186                 band = IEEE80211_BAND_2GHZ;
6187         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
6188                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6189                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6190                 band = IEEE80211_BAND_5GHZ;
6191         } else {
6192                 IWL_WARNING("Invalid scan band count\n");
6193                 goto done;
6194         }
6195
6196         /* select Rx antennas */
6197         scan->flags |= iwl3945_get_antenna_flags(priv);
6198
6199         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
6200                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6201
6202         scan->channel_count =
6203                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
6204                                               n_probes,
6205                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6206
6207         if (scan->channel_count == 0) {
6208                 IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
6209                 goto done;
6210         }
6211
6212         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6213             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6214         cmd.data = scan;
6215         scan->len = cpu_to_le16(cmd.len);
6216
6217         set_bit(STATUS_SCAN_HW, &priv->status);
6218         rc = iwl3945_send_cmd_sync(priv, &cmd);
6219         if (rc)
6220                 goto done;
6221
6222         queue_delayed_work(priv->workqueue, &priv->scan_check,
6223                            IWL_SCAN_CHECK_WATCHDOG);
6224
6225         mutex_unlock(&priv->mutex);
6226         return;
6227
6228  done:
6229         /* can not perform scan make sure we clear scanning
6230          * bits from status so next scan request can be performed.
6231          * if we dont clear scanning status bit here all next scan
6232          * will fail
6233         */
6234         clear_bit(STATUS_SCAN_HW, &priv->status);
6235         clear_bit(STATUS_SCANNING, &priv->status);
6236
6237         /* inform mac80211 scan aborted */
6238         queue_work(priv->workqueue, &priv->scan_completed);
6239         mutex_unlock(&priv->mutex);
6240 }
6241
6242 static void iwl3945_bg_up(struct work_struct *data)
6243 {
6244         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6245
6246         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6247                 return;
6248
6249         mutex_lock(&priv->mutex);
6250         __iwl3945_up(priv);
6251         mutex_unlock(&priv->mutex);
6252         iwl3945_rfkill_set_hw_state(priv);
6253 }
6254
6255 static void iwl3945_bg_restart(struct work_struct *data)
6256 {
6257         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6258
6259         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6260                 return;
6261
6262         iwl3945_down(priv);
6263         queue_work(priv->workqueue, &priv->up);
6264 }
6265
6266 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6267 {
6268         struct iwl3945_priv *priv =
6269             container_of(data, struct iwl3945_priv, rx_replenish);
6270
6271         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6272                 return;
6273
6274         mutex_lock(&priv->mutex);
6275         iwl3945_rx_replenish(priv);
6276         mutex_unlock(&priv->mutex);
6277 }
6278
6279 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6280
6281 static void iwl3945_post_associate(struct iwl3945_priv *priv)
6282 {
6283         int rc = 0;
6284         struct ieee80211_conf *conf = NULL;
6285
6286         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6287                 IWL_ERROR("%s Should not be called in AP mode\n", __func__);
6288                 return;
6289         }
6290
6291
6292         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
6293                         priv->assoc_id, priv->active_rxon.bssid_addr);
6294
6295         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6296                 return;
6297
6298         if (!priv->vif || !priv->is_open)
6299                 return;
6300
6301         iwl3945_scan_cancel_timeout(priv, 200);
6302
6303         conf = ieee80211_get_hw_conf(priv->hw);
6304
6305         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6306         iwl3945_commit_rxon(priv);
6307
6308         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6309         iwl3945_setup_rxon_timing(priv);
6310         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6311                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6312         if (rc)
6313                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6314                             "Attempting to continue.\n");
6315
6316         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6317
6318         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6319
6320         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6321                         priv->assoc_id, priv->beacon_int);
6322
6323         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6324                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6325         else
6326                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6327
6328         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6329                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6330                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6331                 else
6332                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6333
6334                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6335                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6336
6337         }
6338
6339         iwl3945_commit_rxon(priv);
6340
6341         switch (priv->iw_mode) {
6342         case NL80211_IFTYPE_STATION:
6343                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6344                 break;
6345
6346         case NL80211_IFTYPE_ADHOC:
6347
6348                 priv->assoc_id = 1;
6349                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6350                 iwl3945_sync_sta(priv, IWL_STA_ID,
6351                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6352                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6353                                  CMD_ASYNC);
6354                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6355                 iwl3945_send_beacon_cmd(priv);
6356
6357                 break;
6358
6359         default:
6360                  IWL_ERROR("%s Should not be called in %d mode\n",
6361                            __func__, priv->iw_mode);
6362                 break;
6363         }
6364
6365         iwl3945_activate_qos(priv, 0);
6366
6367         /* we have just associated, don't start scan too early */
6368         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6369 }
6370
6371 static void iwl3945_bg_abort_scan(struct work_struct *work)
6372 {
6373         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6374
6375         if (!iwl3945_is_ready(priv))
6376                 return;
6377
6378         mutex_lock(&priv->mutex);
6379
6380         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6381         iwl3945_send_scan_abort(priv);
6382
6383         mutex_unlock(&priv->mutex);
6384 }
6385
6386 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed);
6387
6388 static void iwl3945_bg_scan_completed(struct work_struct *work)
6389 {
6390         struct iwl3945_priv *priv =
6391             container_of(work, struct iwl3945_priv, scan_completed);
6392
6393         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6394
6395         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6396                 return;
6397
6398         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6399                 iwl3945_mac_config(priv->hw, 0);
6400
6401         ieee80211_scan_completed(priv->hw);
6402
6403         /* Since setting the TXPOWER may have been deferred while
6404          * performing the scan, fire one off */
6405         mutex_lock(&priv->mutex);
6406         iwl3945_hw_reg_send_txpower(priv);
6407         mutex_unlock(&priv->mutex);
6408 }
6409
6410 /*****************************************************************************
6411  *
6412  * mac80211 entry point functions
6413  *
6414  *****************************************************************************/
6415
6416 #define UCODE_READY_TIMEOUT     (2 * HZ)
6417
6418 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6419 {
6420         struct iwl3945_priv *priv = hw->priv;
6421         int ret;
6422
6423         IWL_DEBUG_MAC80211("enter\n");
6424
6425         if (pci_enable_device(priv->pci_dev)) {
6426                 IWL_ERROR("Fail to pci_enable_device\n");
6427                 return -ENODEV;
6428         }
6429         pci_restore_state(priv->pci_dev);
6430         pci_enable_msi(priv->pci_dev);
6431
6432         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6433                           DRV_NAME, priv);
6434         if (ret) {
6435                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6436                 goto out_disable_msi;
6437         }
6438
6439         /* we should be verifying the device is ready to be opened */
6440         mutex_lock(&priv->mutex);
6441
6442         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6443         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6444          * ucode filename and max sizes are card-specific. */
6445
6446         if (!priv->ucode_code.len) {
6447                 ret = iwl3945_read_ucode(priv);
6448                 if (ret) {
6449                         IWL_ERROR("Could not read microcode: %d\n", ret);
6450                         mutex_unlock(&priv->mutex);
6451                         goto out_release_irq;
6452                 }
6453         }
6454
6455         ret = __iwl3945_up(priv);
6456
6457         mutex_unlock(&priv->mutex);
6458
6459         iwl3945_rfkill_set_hw_state(priv);
6460
6461         if (ret)
6462                 goto out_release_irq;
6463
6464         IWL_DEBUG_INFO("Start UP work.\n");
6465
6466         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6467                 return 0;
6468
6469         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6470          * mac80211 will not be run successfully. */
6471         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6472                         test_bit(STATUS_READY, &priv->status),
6473                         UCODE_READY_TIMEOUT);
6474         if (!ret) {
6475                 if (!test_bit(STATUS_READY, &priv->status)) {
6476                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6477                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6478                         ret = -ETIMEDOUT;
6479                         goto out_release_irq;
6480                 }
6481         }
6482
6483         priv->is_open = 1;
6484         IWL_DEBUG_MAC80211("leave\n");
6485         return 0;
6486
6487 out_release_irq:
6488         free_irq(priv->pci_dev->irq, priv);
6489 out_disable_msi:
6490         pci_disable_msi(priv->pci_dev);
6491         pci_disable_device(priv->pci_dev);
6492         priv->is_open = 0;
6493         IWL_DEBUG_MAC80211("leave - failed\n");
6494         return ret;
6495 }
6496
6497 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6498 {
6499         struct iwl3945_priv *priv = hw->priv;
6500
6501         IWL_DEBUG_MAC80211("enter\n");
6502
6503         if (!priv->is_open) {
6504                 IWL_DEBUG_MAC80211("leave - skip\n");
6505                 return;
6506         }
6507
6508         priv->is_open = 0;
6509
6510         if (iwl3945_is_ready_rf(priv)) {
6511                 /* stop mac, cancel any scan request and clear
6512                  * RXON_FILTER_ASSOC_MSK BIT
6513                  */
6514                 mutex_lock(&priv->mutex);
6515                 iwl3945_scan_cancel_timeout(priv, 100);
6516                 mutex_unlock(&priv->mutex);
6517         }
6518
6519         iwl3945_down(priv);
6520
6521         flush_workqueue(priv->workqueue);
6522         free_irq(priv->pci_dev->irq, priv);
6523         pci_disable_msi(priv->pci_dev);
6524         pci_save_state(priv->pci_dev);
6525         pci_disable_device(priv->pci_dev);
6526
6527         IWL_DEBUG_MAC80211("leave\n");
6528 }
6529
6530 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
6531 {
6532         struct iwl3945_priv *priv = hw->priv;
6533
6534         IWL_DEBUG_MAC80211("enter\n");
6535
6536         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6537                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
6538
6539         if (iwl3945_tx_skb(priv, skb))
6540                 dev_kfree_skb_any(skb);
6541
6542         IWL_DEBUG_MAC80211("leave\n");
6543         return 0;
6544 }
6545
6546 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6547                                  struct ieee80211_if_init_conf *conf)
6548 {
6549         struct iwl3945_priv *priv = hw->priv;
6550         unsigned long flags;
6551
6552         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6553
6554         if (priv->vif) {
6555                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6556                 return -EOPNOTSUPP;
6557         }
6558
6559         spin_lock_irqsave(&priv->lock, flags);
6560         priv->vif = conf->vif;
6561         priv->iw_mode = conf->type;
6562
6563         spin_unlock_irqrestore(&priv->lock, flags);
6564
6565         mutex_lock(&priv->mutex);
6566
6567         if (conf->mac_addr) {
6568                 IWL_DEBUG_MAC80211("Set: %pM\n", conf->mac_addr);
6569                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6570         }
6571
6572         if (iwl3945_is_ready(priv))
6573                 iwl3945_set_mode(priv, conf->type);
6574
6575         mutex_unlock(&priv->mutex);
6576
6577         IWL_DEBUG_MAC80211("leave\n");
6578         return 0;
6579 }
6580
6581 /**
6582  * iwl3945_mac_config - mac80211 config callback
6583  *
6584  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6585  * be set inappropriately and the driver currently sets the hardware up to
6586  * use it whenever needed.
6587  */
6588 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
6589 {
6590         struct iwl3945_priv *priv = hw->priv;
6591         const struct iwl3945_channel_info *ch_info;
6592         struct ieee80211_conf *conf = &hw->conf;
6593         unsigned long flags;
6594         int ret = 0;
6595
6596         mutex_lock(&priv->mutex);
6597         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6598
6599         if (!iwl3945_is_ready(priv)) {
6600                 IWL_DEBUG_MAC80211("leave - not ready\n");
6601                 ret = -EIO;
6602                 goto out;
6603         }
6604
6605         if (unlikely(!iwl3945_param_disable_hw_scan &&
6606                      test_bit(STATUS_SCANNING, &priv->status))) {
6607                 IWL_DEBUG_MAC80211("leave - scanning\n");
6608                 set_bit(STATUS_CONF_PENDING, &priv->status);
6609                 mutex_unlock(&priv->mutex);
6610                 return 0;
6611         }
6612
6613         spin_lock_irqsave(&priv->lock, flags);
6614
6615         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6616                                            conf->channel->hw_value);
6617         if (!is_channel_valid(ch_info)) {
6618                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
6619                                conf->channel->hw_value, conf->channel->band);
6620                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6621                 spin_unlock_irqrestore(&priv->lock, flags);
6622                 ret = -EINVAL;
6623                 goto out;
6624         }
6625
6626         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6627
6628         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6629
6630         /* The list of supported rates and rate mask can be different
6631          * for each phymode; since the phymode may have changed, reset
6632          * the rate mask to what mac80211 lists */
6633         iwl3945_set_rate(priv);
6634
6635         spin_unlock_irqrestore(&priv->lock, flags);
6636
6637 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6638         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6639                 iwl3945_hw_channel_switch(priv, conf->channel);
6640                 goto out;
6641         }
6642 #endif
6643
6644         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6645
6646         if (!conf->radio_enabled) {
6647                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6648                 goto out;
6649         }
6650
6651         if (iwl3945_is_rfkill(priv)) {
6652                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6653                 ret = -EIO;
6654                 goto out;
6655         }
6656
6657         iwl3945_set_rate(priv);
6658
6659         if (memcmp(&priv->active_rxon,
6660                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6661                 iwl3945_commit_rxon(priv);
6662         else
6663                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6664
6665         IWL_DEBUG_MAC80211("leave\n");
6666
6667 out:
6668         clear_bit(STATUS_CONF_PENDING, &priv->status);
6669         mutex_unlock(&priv->mutex);
6670         return ret;
6671 }
6672
6673 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6674 {
6675         int rc = 0;
6676
6677         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6678                 return;
6679
6680         /* The following should be done only at AP bring up */
6681         if (!(iwl3945_is_associated(priv))) {
6682
6683                 /* RXON - unassoc (to set timing command) */
6684                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6685                 iwl3945_commit_rxon(priv);
6686
6687                 /* RXON Timing */
6688                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6689                 iwl3945_setup_rxon_timing(priv);
6690                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6691                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6692                 if (rc)
6693                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6694                                         "Attempting to continue.\n");
6695
6696                 /* FIXME: what should be the assoc_id for AP? */
6697                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6698                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6699                         priv->staging_rxon.flags |=
6700                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6701                 else
6702                         priv->staging_rxon.flags &=
6703                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6704
6705                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6706                         if (priv->assoc_capability &
6707                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6708                                 priv->staging_rxon.flags |=
6709                                         RXON_FLG_SHORT_SLOT_MSK;
6710                         else
6711                                 priv->staging_rxon.flags &=
6712                                         ~RXON_FLG_SHORT_SLOT_MSK;
6713
6714                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6715                                 priv->staging_rxon.flags &=
6716                                         ~RXON_FLG_SHORT_SLOT_MSK;
6717                 }
6718                 /* restore RXON assoc */
6719                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6720                 iwl3945_commit_rxon(priv);
6721                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6722         }
6723         iwl3945_send_beacon_cmd(priv);
6724
6725         /* FIXME - we need to add code here to detect a totally new
6726          * configuration, reset the AP, unassoc, rxon timing, assoc,
6727          * clear sta table, add BCAST sta... */
6728 }
6729
6730 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6731                                         struct ieee80211_vif *vif,
6732                                     struct ieee80211_if_conf *conf)
6733 {
6734         struct iwl3945_priv *priv = hw->priv;
6735         int rc;
6736
6737         if (conf == NULL)
6738                 return -EIO;
6739
6740         if (priv->vif != vif) {
6741                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6742                 return 0;
6743         }
6744
6745         /* handle this temporarily here */
6746         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
6747             conf->changed & IEEE80211_IFCC_BEACON) {
6748                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
6749                 if (!beacon)
6750                         return -ENOMEM;
6751                 mutex_lock(&priv->mutex);
6752                 rc = iwl3945_mac_beacon_update(hw, beacon);
6753                 mutex_unlock(&priv->mutex);
6754                 if (rc)
6755                         return rc;
6756         }
6757
6758         if (!iwl3945_is_alive(priv))
6759                 return -EAGAIN;
6760
6761         mutex_lock(&priv->mutex);
6762
6763         if (conf->bssid)
6764                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
6765
6766 /*
6767  * very dubious code was here; the probe filtering flag is never set:
6768  *
6769         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6770             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6771  */
6772
6773         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6774                 if (!conf->bssid) {
6775                         conf->bssid = priv->mac_addr;
6776                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6777                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
6778                                            conf->bssid);
6779                 }
6780                 if (priv->ibss_beacon)
6781                         dev_kfree_skb(priv->ibss_beacon);
6782
6783                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
6784         }
6785
6786         if (iwl3945_is_rfkill(priv))
6787                 goto done;
6788
6789         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6790             !is_multicast_ether_addr(conf->bssid)) {
6791                 /* If there is currently a HW scan going on in the background
6792                  * then we need to cancel it else the RXON below will fail. */
6793                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6794                         IWL_WARNING("Aborted scan still in progress "
6795                                     "after 100ms\n");
6796                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6797                         mutex_unlock(&priv->mutex);
6798                         return -EAGAIN;
6799                 }
6800                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6801
6802                 /* TODO: Audit driver for usage of these members and see
6803                  * if mac80211 deprecates them (priv->bssid looks like it
6804                  * shouldn't be there, but I haven't scanned the IBSS code
6805                  * to verify) - jpk */
6806                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6807
6808                 if (priv->iw_mode == NL80211_IFTYPE_AP)
6809                         iwl3945_config_ap(priv);
6810                 else {
6811                         rc = iwl3945_commit_rxon(priv);
6812                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
6813                                 iwl3945_add_station(priv,
6814                                         priv->active_rxon.bssid_addr, 1, 0);
6815                 }
6816
6817         } else {
6818                 iwl3945_scan_cancel_timeout(priv, 100);
6819                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6820                 iwl3945_commit_rxon(priv);
6821         }
6822
6823  done:
6824         IWL_DEBUG_MAC80211("leave\n");
6825         mutex_unlock(&priv->mutex);
6826
6827         return 0;
6828 }
6829
6830 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6831                                  unsigned int changed_flags,
6832                                  unsigned int *total_flags,
6833                                  int mc_count, struct dev_addr_list *mc_list)
6834 {
6835         struct iwl3945_priv *priv = hw->priv;
6836         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
6837
6838         IWL_DEBUG_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
6839                         changed_flags, *total_flags);
6840
6841         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
6842                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
6843                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
6844                 else
6845                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
6846         }
6847         if (changed_flags & FIF_ALLMULTI) {
6848                 if (*total_flags & FIF_ALLMULTI)
6849                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
6850                 else
6851                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
6852         }
6853         if (changed_flags & FIF_CONTROL) {
6854                 if (*total_flags & FIF_CONTROL)
6855                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
6856                 else
6857                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
6858         }
6859         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
6860                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
6861                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
6862                 else
6863                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
6864         }
6865
6866         /* We avoid iwl_commit_rxon here to commit the new filter flags
6867          * since mac80211 will call ieee80211_hw_config immediately.
6868          * (mc_list is not supported at this time). Otherwise, we need to
6869          * queue a background iwl_commit_rxon work.
6870          */
6871
6872         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
6873                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6874 }
6875
6876 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
6877                                      struct ieee80211_if_init_conf *conf)
6878 {
6879         struct iwl3945_priv *priv = hw->priv;
6880
6881         IWL_DEBUG_MAC80211("enter\n");
6882
6883         mutex_lock(&priv->mutex);
6884
6885         if (iwl3945_is_ready_rf(priv)) {
6886                 iwl3945_scan_cancel_timeout(priv, 100);
6887                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6888                 iwl3945_commit_rxon(priv);
6889         }
6890         if (priv->vif == conf->vif) {
6891                 priv->vif = NULL;
6892                 memset(priv->bssid, 0, ETH_ALEN);
6893         }
6894         mutex_unlock(&priv->mutex);
6895
6896         IWL_DEBUG_MAC80211("leave\n");
6897 }
6898
6899 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6900
6901 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
6902                                      struct ieee80211_vif *vif,
6903                                      struct ieee80211_bss_conf *bss_conf,
6904                                      u32 changes)
6905 {
6906         struct iwl3945_priv *priv = hw->priv;
6907
6908         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6909
6910         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6911                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6912                                    bss_conf->use_short_preamble);
6913                 if (bss_conf->use_short_preamble)
6914                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6915                 else
6916                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6917         }
6918
6919         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6920                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6921                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6922                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6923                 else
6924                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6925         }
6926
6927         if (changes & BSS_CHANGED_ASSOC) {
6928                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6929                 /* This should never happen as this function should
6930                  * never be called from interrupt context. */
6931                 if (WARN_ON_ONCE(in_interrupt()))
6932                         return;
6933                 if (bss_conf->assoc) {
6934                         priv->assoc_id = bss_conf->aid;
6935                         priv->beacon_int = bss_conf->beacon_int;
6936                         priv->timestamp0 = bss_conf->timestamp & 0xFFFFFFFF;
6937                         priv->timestamp1 = (bss_conf->timestamp >> 32) &
6938                                              0xFFFFFFFF;
6939                         priv->assoc_capability = bss_conf->assoc_capability;
6940                         priv->next_scan_jiffies = jiffies +
6941                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6942                         mutex_lock(&priv->mutex);
6943                         iwl3945_post_associate(priv);
6944                         mutex_unlock(&priv->mutex);
6945                 } else {
6946                         priv->assoc_id = 0;
6947                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6948                 }
6949         } else if (changes && iwl3945_is_associated(priv) && priv->assoc_id) {
6950                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6951                         iwl3945_send_rxon_assoc(priv);
6952         }
6953
6954 }
6955
6956 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6957 {
6958         int rc = 0;
6959         unsigned long flags;
6960         struct iwl3945_priv *priv = hw->priv;
6961         DECLARE_SSID_BUF(ssid_buf);
6962
6963         IWL_DEBUG_MAC80211("enter\n");
6964
6965         mutex_lock(&priv->mutex);
6966         spin_lock_irqsave(&priv->lock, flags);
6967
6968         if (!iwl3945_is_ready_rf(priv)) {
6969                 rc = -EIO;
6970                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6971                 goto out_unlock;
6972         }
6973
6974         /* we don't schedule scan within next_scan_jiffies period */
6975         if (priv->next_scan_jiffies &&
6976                         time_after(priv->next_scan_jiffies, jiffies)) {
6977                 rc = -EAGAIN;
6978                 goto out_unlock;
6979         }
6980         /* if we just finished scan ask for delay for a broadcast scan */
6981         if ((len == 0) && priv->last_scan_jiffies &&
6982             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
6983                        jiffies)) {
6984                 rc = -EAGAIN;
6985                 goto out_unlock;
6986         }
6987         if (len) {
6988                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6989                                print_ssid(ssid_buf, ssid, len), (int)len);
6990
6991                 priv->one_direct_scan = 1;
6992                 priv->direct_ssid_len = (u8)
6993                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6994                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6995         } else
6996                 priv->one_direct_scan = 0;
6997
6998         rc = iwl3945_scan_initiate(priv);
6999
7000         IWL_DEBUG_MAC80211("leave\n");
7001
7002 out_unlock:
7003         spin_unlock_irqrestore(&priv->lock, flags);
7004         mutex_unlock(&priv->mutex);
7005
7006         return rc;
7007 }
7008
7009 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7010                            const u8 *local_addr, const u8 *addr,
7011                            struct ieee80211_key_conf *key)
7012 {
7013         struct iwl3945_priv *priv = hw->priv;
7014         int rc = 0;
7015         u8 sta_id;
7016
7017         IWL_DEBUG_MAC80211("enter\n");
7018
7019         if (!iwl3945_param_hwcrypto) {
7020                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7021                 return -EOPNOTSUPP;
7022         }
7023
7024         if (is_zero_ether_addr(addr))
7025                 /* only support pairwise keys */
7026                 return -EOPNOTSUPP;
7027
7028         sta_id = iwl3945_hw_find_station(priv, addr);
7029         if (sta_id == IWL_INVALID_STATION) {
7030                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
7031                                    addr);
7032                 return -EINVAL;
7033         }
7034
7035         mutex_lock(&priv->mutex);
7036
7037         iwl3945_scan_cancel_timeout(priv, 100);
7038
7039         switch (cmd) {
7040         case  SET_KEY:
7041                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7042                 if (!rc) {
7043                         iwl3945_set_rxon_hwcrypto(priv, 1);
7044                         iwl3945_commit_rxon(priv);
7045                         key->hw_key_idx = sta_id;
7046                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7047                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7048                 }
7049                 break;
7050         case DISABLE_KEY:
7051                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7052                 if (!rc) {
7053                         iwl3945_set_rxon_hwcrypto(priv, 0);
7054                         iwl3945_commit_rxon(priv);
7055                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7056                 }
7057                 break;
7058         default:
7059                 rc = -EINVAL;
7060         }
7061
7062         IWL_DEBUG_MAC80211("leave\n");
7063         mutex_unlock(&priv->mutex);
7064
7065         return rc;
7066 }
7067
7068 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
7069                            const struct ieee80211_tx_queue_params *params)
7070 {
7071         struct iwl3945_priv *priv = hw->priv;
7072         unsigned long flags;
7073         int q;
7074
7075         IWL_DEBUG_MAC80211("enter\n");
7076
7077         if (!iwl3945_is_ready_rf(priv)) {
7078                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7079                 return -EIO;
7080         }
7081
7082         if (queue >= AC_NUM) {
7083                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7084                 return 0;
7085         }
7086
7087         q = AC_NUM - 1 - queue;
7088
7089         spin_lock_irqsave(&priv->lock, flags);
7090
7091         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7092         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7093         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7094         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7095                         cpu_to_le16((params->txop * 32));
7096
7097         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7098         priv->qos_data.qos_active = 1;
7099
7100         spin_unlock_irqrestore(&priv->lock, flags);
7101
7102         mutex_lock(&priv->mutex);
7103         if (priv->iw_mode == NL80211_IFTYPE_AP)
7104                 iwl3945_activate_qos(priv, 1);
7105         else if (priv->assoc_id && iwl3945_is_associated(priv))
7106                 iwl3945_activate_qos(priv, 0);
7107
7108         mutex_unlock(&priv->mutex);
7109
7110         IWL_DEBUG_MAC80211("leave\n");
7111         return 0;
7112 }
7113
7114 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7115                                 struct ieee80211_tx_queue_stats *stats)
7116 {
7117         struct iwl3945_priv *priv = hw->priv;
7118         int i, avail;
7119         struct iwl3945_tx_queue *txq;
7120         struct iwl3945_queue *q;
7121         unsigned long flags;
7122
7123         IWL_DEBUG_MAC80211("enter\n");
7124
7125         if (!iwl3945_is_ready_rf(priv)) {
7126                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7127                 return -EIO;
7128         }
7129
7130         spin_lock_irqsave(&priv->lock, flags);
7131
7132         for (i = 0; i < AC_NUM; i++) {
7133                 txq = &priv->txq[i];
7134                 q = &txq->q;
7135                 avail = iwl3945_queue_space(q);
7136
7137                 stats[i].len = q->n_window - avail;
7138                 stats[i].limit = q->n_window - q->high_mark;
7139                 stats[i].count = q->n_window;
7140
7141         }
7142         spin_unlock_irqrestore(&priv->lock, flags);
7143
7144         IWL_DEBUG_MAC80211("leave\n");
7145
7146         return 0;
7147 }
7148
7149 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7150                              struct ieee80211_low_level_stats *stats)
7151 {
7152         IWL_DEBUG_MAC80211("enter\n");
7153         IWL_DEBUG_MAC80211("leave\n");
7154
7155         return 0;
7156 }
7157
7158 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7159 {
7160         struct iwl3945_priv *priv = hw->priv;
7161         unsigned long flags;
7162
7163         mutex_lock(&priv->mutex);
7164         IWL_DEBUG_MAC80211("enter\n");
7165
7166         iwl3945_reset_qos(priv);
7167
7168         spin_lock_irqsave(&priv->lock, flags);
7169         priv->assoc_id = 0;
7170         priv->assoc_capability = 0;
7171         priv->call_post_assoc_from_beacon = 0;
7172
7173         /* new association get rid of ibss beacon skb */
7174         if (priv->ibss_beacon)
7175                 dev_kfree_skb(priv->ibss_beacon);
7176
7177         priv->ibss_beacon = NULL;
7178
7179         priv->beacon_int = priv->hw->conf.beacon_int;
7180         priv->timestamp1 = 0;
7181         priv->timestamp0 = 0;
7182         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
7183                 priv->beacon_int = 0;
7184
7185         spin_unlock_irqrestore(&priv->lock, flags);
7186
7187         if (!iwl3945_is_ready_rf(priv)) {
7188                 IWL_DEBUG_MAC80211("leave - not ready\n");
7189                 mutex_unlock(&priv->mutex);
7190                 return;
7191         }
7192
7193         /* we are restarting association process
7194          * clear RXON_FILTER_ASSOC_MSK bit
7195         */
7196         if (priv->iw_mode != NL80211_IFTYPE_AP) {
7197                 iwl3945_scan_cancel_timeout(priv, 100);
7198                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7199                 iwl3945_commit_rxon(priv);
7200         }
7201
7202         /* Per mac80211.h: This is only used in IBSS mode... */
7203         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7204
7205                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7206                 mutex_unlock(&priv->mutex);
7207                 return;
7208         }
7209
7210         iwl3945_set_rate(priv);
7211
7212         mutex_unlock(&priv->mutex);
7213
7214         IWL_DEBUG_MAC80211("leave\n");
7215
7216 }
7217
7218 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
7219 {
7220         struct iwl3945_priv *priv = hw->priv;
7221         unsigned long flags;
7222
7223         IWL_DEBUG_MAC80211("enter\n");
7224
7225         if (!iwl3945_is_ready_rf(priv)) {
7226                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7227                 return -EIO;
7228         }
7229
7230         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7231                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7232                 return -EIO;
7233         }
7234
7235         spin_lock_irqsave(&priv->lock, flags);
7236
7237         if (priv->ibss_beacon)
7238                 dev_kfree_skb(priv->ibss_beacon);
7239
7240         priv->ibss_beacon = skb;
7241
7242         priv->assoc_id = 0;
7243
7244         IWL_DEBUG_MAC80211("leave\n");
7245         spin_unlock_irqrestore(&priv->lock, flags);
7246
7247         iwl3945_reset_qos(priv);
7248
7249         iwl3945_post_associate(priv);
7250
7251
7252         return 0;
7253 }
7254
7255 /*****************************************************************************
7256  *
7257  * sysfs attributes
7258  *
7259  *****************************************************************************/
7260
7261 #ifdef CONFIG_IWL3945_DEBUG
7262
7263 /*
7264  * The following adds a new attribute to the sysfs representation
7265  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7266  * used for controlling the debug level.
7267  *
7268  * See the level definitions in iwl for details.
7269  */
7270
7271 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7272 {
7273         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7274 }
7275 static ssize_t store_debug_level(struct device_driver *d,
7276                                  const char *buf, size_t count)
7277 {
7278         char *p = (char *)buf;
7279         u32 val;
7280
7281         val = simple_strtoul(p, &p, 0);
7282         if (p == buf)
7283                 printk(KERN_INFO DRV_NAME
7284                        ": %s is not in hex or decimal form.\n", buf);
7285         else
7286                 iwl3945_debug_level = val;
7287
7288         return strnlen(buf, count);
7289 }
7290
7291 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7292                    show_debug_level, store_debug_level);
7293
7294 #endif /* CONFIG_IWL3945_DEBUG */
7295
7296 static ssize_t show_temperature(struct device *d,
7297                                 struct device_attribute *attr, char *buf)
7298 {
7299         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7300
7301         if (!iwl3945_is_alive(priv))
7302                 return -EAGAIN;
7303
7304         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7305 }
7306
7307 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7308
7309 static ssize_t show_tx_power(struct device *d,
7310                              struct device_attribute *attr, char *buf)
7311 {
7312         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7313         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7314 }
7315
7316 static ssize_t store_tx_power(struct device *d,
7317                               struct device_attribute *attr,
7318                               const char *buf, size_t count)
7319 {
7320         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7321         char *p = (char *)buf;
7322         u32 val;
7323
7324         val = simple_strtoul(p, &p, 10);
7325         if (p == buf)
7326                 printk(KERN_INFO DRV_NAME
7327                        ": %s is not in decimal form.\n", buf);
7328         else
7329                 iwl3945_hw_reg_set_txpower(priv, val);
7330
7331         return count;
7332 }
7333
7334 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7335
7336 static ssize_t show_flags(struct device *d,
7337                           struct device_attribute *attr, char *buf)
7338 {
7339         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7340
7341         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7342 }
7343
7344 static ssize_t store_flags(struct device *d,
7345                            struct device_attribute *attr,
7346                            const char *buf, size_t count)
7347 {
7348         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7349         u32 flags = simple_strtoul(buf, NULL, 0);
7350
7351         mutex_lock(&priv->mutex);
7352         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7353                 /* Cancel any currently running scans... */
7354                 if (iwl3945_scan_cancel_timeout(priv, 100))
7355                         IWL_WARNING("Could not cancel scan.\n");
7356                 else {
7357                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7358                                        flags);
7359                         priv->staging_rxon.flags = cpu_to_le32(flags);
7360                         iwl3945_commit_rxon(priv);
7361                 }
7362         }
7363         mutex_unlock(&priv->mutex);
7364
7365         return count;
7366 }
7367
7368 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7369
7370 static ssize_t show_filter_flags(struct device *d,
7371                                  struct device_attribute *attr, char *buf)
7372 {
7373         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7374
7375         return sprintf(buf, "0x%04X\n",
7376                 le32_to_cpu(priv->active_rxon.filter_flags));
7377 }
7378
7379 static ssize_t store_filter_flags(struct device *d,
7380                                   struct device_attribute *attr,
7381                                   const char *buf, size_t count)
7382 {
7383         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7384         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7385
7386         mutex_lock(&priv->mutex);
7387         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7388                 /* Cancel any currently running scans... */
7389                 if (iwl3945_scan_cancel_timeout(priv, 100))
7390                         IWL_WARNING("Could not cancel scan.\n");
7391                 else {
7392                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7393                                        "0x%04X\n", filter_flags);
7394                         priv->staging_rxon.filter_flags =
7395                                 cpu_to_le32(filter_flags);
7396                         iwl3945_commit_rxon(priv);
7397                 }
7398         }
7399         mutex_unlock(&priv->mutex);
7400
7401         return count;
7402 }
7403
7404 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7405                    store_filter_flags);
7406
7407 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7408
7409 static ssize_t show_measurement(struct device *d,
7410                                 struct device_attribute *attr, char *buf)
7411 {
7412         struct iwl3945_priv *priv = dev_get_drvdata(d);
7413         struct iwl3945_spectrum_notification measure_report;
7414         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7415         u8 *data = (u8 *)&measure_report;
7416         unsigned long flags;
7417
7418         spin_lock_irqsave(&priv->lock, flags);
7419         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7420                 spin_unlock_irqrestore(&priv->lock, flags);
7421                 return 0;
7422         }
7423         memcpy(&measure_report, &priv->measure_report, size);
7424         priv->measurement_status = 0;
7425         spin_unlock_irqrestore(&priv->lock, flags);
7426
7427         while (size && (PAGE_SIZE - len)) {
7428                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7429                                    PAGE_SIZE - len, 1);
7430                 len = strlen(buf);
7431                 if (PAGE_SIZE - len)
7432                         buf[len++] = '\n';
7433
7434                 ofs += 16;
7435                 size -= min(size, 16U);
7436         }
7437
7438         return len;
7439 }
7440
7441 static ssize_t store_measurement(struct device *d,
7442                                  struct device_attribute *attr,
7443                                  const char *buf, size_t count)
7444 {
7445         struct iwl3945_priv *priv = dev_get_drvdata(d);
7446         struct ieee80211_measurement_params params = {
7447                 .channel = le16_to_cpu(priv->active_rxon.channel),
7448                 .start_time = cpu_to_le64(priv->last_tsf),
7449                 .duration = cpu_to_le16(1),
7450         };
7451         u8 type = IWL_MEASURE_BASIC;
7452         u8 buffer[32];
7453         u8 channel;
7454
7455         if (count) {
7456                 char *p = buffer;
7457                 strncpy(buffer, buf, min(sizeof(buffer), count));
7458                 channel = simple_strtoul(p, NULL, 0);
7459                 if (channel)
7460                         params.channel = channel;
7461
7462                 p = buffer;
7463                 while (*p && *p != ' ')
7464                         p++;
7465                 if (*p)
7466                         type = simple_strtoul(p + 1, NULL, 0);
7467         }
7468
7469         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7470                        "channel %d (for '%s')\n", type, params.channel, buf);
7471         iwl3945_get_measurement(priv, &params, type);
7472
7473         return count;
7474 }
7475
7476 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7477                    show_measurement, store_measurement);
7478 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7479
7480 static ssize_t store_retry_rate(struct device *d,
7481                                 struct device_attribute *attr,
7482                                 const char *buf, size_t count)
7483 {
7484         struct iwl3945_priv *priv = dev_get_drvdata(d);
7485
7486         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7487         if (priv->retry_rate <= 0)
7488                 priv->retry_rate = 1;
7489
7490         return count;
7491 }
7492
7493 static ssize_t show_retry_rate(struct device *d,
7494                                struct device_attribute *attr, char *buf)
7495 {
7496         struct iwl3945_priv *priv = dev_get_drvdata(d);
7497         return sprintf(buf, "%d", priv->retry_rate);
7498 }
7499
7500 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7501                    store_retry_rate);
7502
7503 static ssize_t store_power_level(struct device *d,
7504                                  struct device_attribute *attr,
7505                                  const char *buf, size_t count)
7506 {
7507         struct iwl3945_priv *priv = dev_get_drvdata(d);
7508         int rc;
7509         int mode;
7510
7511         mode = simple_strtoul(buf, NULL, 0);
7512         mutex_lock(&priv->mutex);
7513
7514         if (!iwl3945_is_ready(priv)) {
7515                 rc = -EAGAIN;
7516                 goto out;
7517         }
7518
7519         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7520                 mode = IWL_POWER_AC;
7521         else
7522                 mode |= IWL_POWER_ENABLED;
7523
7524         if (mode != priv->power_mode) {
7525                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7526                 if (rc) {
7527                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7528                         goto out;
7529                 }
7530                 priv->power_mode = mode;
7531         }
7532
7533         rc = count;
7534
7535  out:
7536         mutex_unlock(&priv->mutex);
7537         return rc;
7538 }
7539
7540 #define MAX_WX_STRING 80
7541
7542 /* Values are in microsecond */
7543 static const s32 timeout_duration[] = {
7544         350000,
7545         250000,
7546         75000,
7547         37000,
7548         25000,
7549 };
7550 static const s32 period_duration[] = {
7551         400000,
7552         700000,
7553         1000000,
7554         1000000,
7555         1000000
7556 };
7557
7558 static ssize_t show_power_level(struct device *d,
7559                                 struct device_attribute *attr, char *buf)
7560 {
7561         struct iwl3945_priv *priv = dev_get_drvdata(d);
7562         int level = IWL_POWER_LEVEL(priv->power_mode);
7563         char *p = buf;
7564
7565         p += sprintf(p, "%d ", level);
7566         switch (level) {
7567         case IWL_POWER_MODE_CAM:
7568         case IWL_POWER_AC:
7569                 p += sprintf(p, "(AC)");
7570                 break;
7571         case IWL_POWER_BATTERY:
7572                 p += sprintf(p, "(BATTERY)");
7573                 break;
7574         default:
7575                 p += sprintf(p,
7576                              "(Timeout %dms, Period %dms)",
7577                              timeout_duration[level - 1] / 1000,
7578                              period_duration[level - 1] / 1000);
7579         }
7580
7581         if (!(priv->power_mode & IWL_POWER_ENABLED))
7582                 p += sprintf(p, " OFF\n");
7583         else
7584                 p += sprintf(p, " \n");
7585
7586         return p - buf + 1;
7587
7588 }
7589
7590 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7591                    store_power_level);
7592
7593 static ssize_t show_channels(struct device *d,
7594                              struct device_attribute *attr, char *buf)
7595 {
7596         /* all this shit doesn't belong into sysfs anyway */
7597         return 0;
7598 }
7599
7600 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7601
7602 static ssize_t show_statistics(struct device *d,
7603                                struct device_attribute *attr, char *buf)
7604 {
7605         struct iwl3945_priv *priv = dev_get_drvdata(d);
7606         u32 size = sizeof(struct iwl3945_notif_statistics);
7607         u32 len = 0, ofs = 0;
7608         u8 *data = (u8 *)&priv->statistics;
7609         int rc = 0;
7610
7611         if (!iwl3945_is_alive(priv))
7612                 return -EAGAIN;
7613
7614         mutex_lock(&priv->mutex);
7615         rc = iwl3945_send_statistics_request(priv);
7616         mutex_unlock(&priv->mutex);
7617
7618         if (rc) {
7619                 len = sprintf(buf,
7620                               "Error sending statistics request: 0x%08X\n", rc);
7621                 return len;
7622         }
7623
7624         while (size && (PAGE_SIZE - len)) {
7625                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7626                                    PAGE_SIZE - len, 1);
7627                 len = strlen(buf);
7628                 if (PAGE_SIZE - len)
7629                         buf[len++] = '\n';
7630
7631                 ofs += 16;
7632                 size -= min(size, 16U);
7633         }
7634
7635         return len;
7636 }
7637
7638 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7639
7640 static ssize_t show_antenna(struct device *d,
7641                             struct device_attribute *attr, char *buf)
7642 {
7643         struct iwl3945_priv *priv = dev_get_drvdata(d);
7644
7645         if (!iwl3945_is_alive(priv))
7646                 return -EAGAIN;
7647
7648         return sprintf(buf, "%d\n", priv->antenna);
7649 }
7650
7651 static ssize_t store_antenna(struct device *d,
7652                              struct device_attribute *attr,
7653                              const char *buf, size_t count)
7654 {
7655         int ant;
7656         struct iwl3945_priv *priv = dev_get_drvdata(d);
7657
7658         if (count == 0)
7659                 return 0;
7660
7661         if (sscanf(buf, "%1i", &ant) != 1) {
7662                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7663                 return count;
7664         }
7665
7666         if ((ant >= 0) && (ant <= 2)) {
7667                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7668                 priv->antenna = (enum iwl3945_antenna)ant;
7669         } else
7670                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7671
7672
7673         return count;
7674 }
7675
7676 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7677
7678 static ssize_t show_status(struct device *d,
7679                            struct device_attribute *attr, char *buf)
7680 {
7681         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7682         if (!iwl3945_is_alive(priv))
7683                 return -EAGAIN;
7684         return sprintf(buf, "0x%08x\n", (int)priv->status);
7685 }
7686
7687 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7688
7689 static ssize_t dump_error_log(struct device *d,
7690                               struct device_attribute *attr,
7691                               const char *buf, size_t count)
7692 {
7693         char *p = (char *)buf;
7694
7695         if (p[0] == '1')
7696                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7697
7698         return strnlen(buf, count);
7699 }
7700
7701 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7702
7703 static ssize_t dump_event_log(struct device *d,
7704                               struct device_attribute *attr,
7705                               const char *buf, size_t count)
7706 {
7707         char *p = (char *)buf;
7708
7709         if (p[0] == '1')
7710                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7711
7712         return strnlen(buf, count);
7713 }
7714
7715 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7716
7717 /*****************************************************************************
7718  *
7719  * driver setup and tear down
7720  *
7721  *****************************************************************************/
7722
7723 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7724 {
7725         priv->workqueue = create_workqueue(DRV_NAME);
7726
7727         init_waitqueue_head(&priv->wait_command_queue);
7728
7729         INIT_WORK(&priv->up, iwl3945_bg_up);
7730         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7731         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7732         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7733         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7734         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7735         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7736         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7737         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7738         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7739         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7740
7741         iwl3945_hw_setup_deferred_work(priv);
7742
7743         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7744                      iwl3945_irq_tasklet, (unsigned long)priv);
7745 }
7746
7747 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7748 {
7749         iwl3945_hw_cancel_deferred_work(priv);
7750
7751         cancel_delayed_work_sync(&priv->init_alive_start);
7752         cancel_delayed_work(&priv->scan_check);
7753         cancel_delayed_work(&priv->alive_start);
7754         cancel_work_sync(&priv->beacon_update);
7755 }
7756
7757 static struct attribute *iwl3945_sysfs_entries[] = {
7758         &dev_attr_antenna.attr,
7759         &dev_attr_channels.attr,
7760         &dev_attr_dump_errors.attr,
7761         &dev_attr_dump_events.attr,
7762         &dev_attr_flags.attr,
7763         &dev_attr_filter_flags.attr,
7764 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7765         &dev_attr_measurement.attr,
7766 #endif
7767         &dev_attr_power_level.attr,
7768         &dev_attr_retry_rate.attr,
7769         &dev_attr_statistics.attr,
7770         &dev_attr_status.attr,
7771         &dev_attr_temperature.attr,
7772         &dev_attr_tx_power.attr,
7773
7774         NULL
7775 };
7776
7777 static struct attribute_group iwl3945_attribute_group = {
7778         .name = NULL,           /* put in device directory */
7779         .attrs = iwl3945_sysfs_entries,
7780 };
7781
7782 static struct ieee80211_ops iwl3945_hw_ops = {
7783         .tx = iwl3945_mac_tx,
7784         .start = iwl3945_mac_start,
7785         .stop = iwl3945_mac_stop,
7786         .add_interface = iwl3945_mac_add_interface,
7787         .remove_interface = iwl3945_mac_remove_interface,
7788         .config = iwl3945_mac_config,
7789         .config_interface = iwl3945_mac_config_interface,
7790         .configure_filter = iwl3945_configure_filter,
7791         .set_key = iwl3945_mac_set_key,
7792         .get_stats = iwl3945_mac_get_stats,
7793         .get_tx_stats = iwl3945_mac_get_tx_stats,
7794         .conf_tx = iwl3945_mac_conf_tx,
7795         .reset_tsf = iwl3945_mac_reset_tsf,
7796         .bss_info_changed = iwl3945_bss_info_changed,
7797         .hw_scan = iwl3945_mac_hw_scan
7798 };
7799
7800 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7801 {
7802         int err = 0;
7803         struct iwl3945_priv *priv;
7804         struct ieee80211_hw *hw;
7805         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7806         unsigned long flags;
7807
7808         /***********************
7809          * 1. Allocating HW data
7810          * ********************/
7811
7812         /* Disabling hardware scan means that mac80211 will perform scans
7813          * "the hard way", rather than using device's scan. */
7814         if (iwl3945_param_disable_hw_scan) {
7815                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7816                 iwl3945_hw_ops.hw_scan = NULL;
7817         }
7818
7819         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7820             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7821                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7822                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7823                 err = -EINVAL;
7824                 goto out;
7825         }
7826
7827         /* mac80211 allocates memory for this device instance, including
7828          *   space for this driver's private structure */
7829         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7830         if (hw == NULL) {
7831                 IWL_ERROR("Can not allocate network device\n");
7832                 err = -ENOMEM;
7833                 goto out;
7834         }
7835
7836         SET_IEEE80211_DEV(hw, &pdev->dev);
7837
7838         priv = hw->priv;
7839         priv->hw = hw;
7840         priv->pci_dev = pdev;
7841         priv->cfg = cfg;
7842
7843         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7844         hw->rate_control_algorithm = "iwl-3945-rs";
7845         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
7846
7847         /* Select antenna (may be helpful if only one antenna is connected) */
7848         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7849 #ifdef CONFIG_IWL3945_DEBUG
7850         iwl3945_debug_level = iwl3945_param_debug;
7851         atomic_set(&priv->restrict_refcnt, 0);
7852 #endif
7853
7854         /* Tell mac80211 our characteristics */
7855         hw->flags = IEEE80211_HW_SIGNAL_DBM |
7856                     IEEE80211_HW_NOISE_DBM;
7857
7858         hw->wiphy->interface_modes =
7859                 BIT(NL80211_IFTYPE_STATION) |
7860                 BIT(NL80211_IFTYPE_ADHOC);
7861
7862         hw->wiphy->fw_handles_regulatory = true;
7863
7864         /* 4 EDCA QOS priorities */
7865         hw->queues = 4;
7866
7867         /***************************
7868          * 2. Initializing PCI bus
7869          * *************************/
7870         if (pci_enable_device(pdev)) {
7871                 err = -ENODEV;
7872                 goto out_ieee80211_free_hw;
7873         }
7874
7875         pci_set_master(pdev);
7876
7877         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7878         if (!err)
7879                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7880         if (err) {
7881                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
7882                 goto out_pci_disable_device;
7883         }
7884
7885         pci_set_drvdata(pdev, priv);
7886         err = pci_request_regions(pdev, DRV_NAME);
7887         if (err)
7888                 goto out_pci_disable_device;
7889
7890         /***********************
7891          * 3. Read REV Register
7892          * ********************/
7893         priv->hw_base = pci_iomap(pdev, 0, 0);
7894         if (!priv->hw_base) {
7895                 err = -ENODEV;
7896                 goto out_pci_release_regions;
7897         }
7898
7899         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7900                         (unsigned long long) pci_resource_len(pdev, 0));
7901         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7902
7903         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7904          * PCI Tx retries from interfering with C3 CPU state */
7905         pci_write_config_byte(pdev, 0x41, 0x00);
7906
7907         /* nic init */
7908         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7909                         CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7910
7911         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7912         err = iwl3945_poll_direct_bit(priv, CSR_GP_CNTRL,
7913                                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7914         if (err < 0) {
7915                 IWL_DEBUG_INFO("Failed to init the card\n");
7916                 goto out_remove_sysfs;
7917         }
7918
7919         /***********************
7920          * 4. Read EEPROM
7921          * ********************/
7922         /* Read the EEPROM */
7923         err = iwl3945_eeprom_init(priv);
7924         if (err) {
7925                 IWL_ERROR("Unable to init EEPROM\n");
7926                 goto out_remove_sysfs;
7927         }
7928         /* MAC Address location in EEPROM same for 3945/4965 */
7929         get_eeprom_mac(priv, priv->mac_addr);
7930         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
7931         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7932
7933         /***********************
7934          * 5. Setup HW Constants
7935          * ********************/
7936         /* Device-specific setup */
7937         if (iwl3945_hw_set_hw_setting(priv)) {
7938                 IWL_ERROR("failed to set hw settings\n");
7939                 goto out_iounmap;
7940         }
7941
7942         /***********************
7943          * 6. Setup priv
7944          * ********************/
7945         priv->retry_rate = 1;
7946         priv->ibss_beacon = NULL;
7947
7948         spin_lock_init(&priv->lock);
7949         spin_lock_init(&priv->power_data.lock);
7950         spin_lock_init(&priv->sta_lock);
7951         spin_lock_init(&priv->hcmd_lock);
7952
7953         INIT_LIST_HEAD(&priv->free_frames);
7954         mutex_init(&priv->mutex);
7955
7956         /* Clear the driver's (not device's) station table */
7957         iwl3945_clear_stations_table(priv);
7958
7959         priv->data_retry_limit = -1;
7960         priv->ieee_channels = NULL;
7961         priv->ieee_rates = NULL;
7962         priv->band = IEEE80211_BAND_2GHZ;
7963
7964         priv->iw_mode = NL80211_IFTYPE_STATION;
7965
7966         iwl3945_reset_qos(priv);
7967
7968         priv->qos_data.qos_active = 0;
7969         priv->qos_data.qos_cap.val = 0;
7970
7971
7972         priv->rates_mask = IWL_RATES_MASK;
7973         /* If power management is turned on, default to AC mode */
7974         priv->power_mode = IWL_POWER_AC;
7975         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
7976
7977         err = iwl3945_init_channel_map(priv);
7978         if (err) {
7979                 IWL_ERROR("initializing regulatory failed: %d\n", err);
7980                 goto out_release_irq;
7981         }
7982
7983         err = iwl3945_init_geos(priv);
7984         if (err) {
7985                 IWL_ERROR("initializing geos failed: %d\n", err);
7986                 goto out_free_channel_map;
7987         }
7988
7989         printk(KERN_INFO DRV_NAME
7990                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7991
7992         /***********************************
7993          * 7. Initialize Module Parameters
7994          * **********************************/
7995
7996         /* Initialize module parameter values here */
7997         /* Disable radio (SW RF KILL) via parameter when loading driver */
7998         if (iwl3945_param_disable) {
7999                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8000                 IWL_DEBUG_INFO("Radio disabled.\n");
8001         }
8002
8003
8004         /***********************
8005          * 8. Setup Services
8006          * ********************/
8007
8008         spin_lock_irqsave(&priv->lock, flags);
8009         iwl3945_disable_interrupts(priv);
8010         spin_unlock_irqrestore(&priv->lock, flags);
8011
8012         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8013         if (err) {
8014                 IWL_ERROR("failed to create sysfs device attributes\n");
8015                 goto out_free_geos;
8016         }
8017
8018         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8019         iwl3945_setup_deferred_work(priv);
8020         iwl3945_setup_rx_handlers(priv);
8021
8022         /***********************
8023          * 9. Conclude
8024          * ********************/
8025         pci_save_state(pdev);
8026         pci_disable_device(pdev);
8027
8028         /*********************************
8029          * 10. Setup and Register mac80211
8030          * *******************************/
8031
8032         err = ieee80211_register_hw(priv->hw);
8033         if (err) {
8034                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8035                 goto  out_remove_sysfs;
8036         }
8037
8038         priv->hw->conf.beacon_int = 100;
8039         priv->mac80211_registered = 1;
8040
8041
8042         err = iwl3945_rfkill_init(priv);
8043         if (err)
8044                 IWL_ERROR("Unable to initialize RFKILL system. "
8045                                   "Ignoring error: %d\n", err);
8046
8047         return 0;
8048
8049  out_remove_sysfs:
8050         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8051  out_free_geos:
8052         iwl3945_free_geos(priv);
8053  out_free_channel_map:
8054         iwl3945_free_channel_map(priv);
8055
8056
8057  out_release_irq:
8058         destroy_workqueue(priv->workqueue);
8059         priv->workqueue = NULL;
8060         iwl3945_unset_hw_setting(priv);
8061
8062  out_iounmap:
8063         pci_iounmap(pdev, priv->hw_base);
8064  out_pci_release_regions:
8065         pci_release_regions(pdev);
8066  out_pci_disable_device:
8067         pci_disable_device(pdev);
8068         pci_set_drvdata(pdev, NULL);
8069  out_ieee80211_free_hw:
8070         ieee80211_free_hw(priv->hw);
8071  out:
8072         return err;
8073 }
8074
8075 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8076 {
8077         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8078         unsigned long flags;
8079
8080         if (!priv)
8081                 return;
8082
8083         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8084
8085         set_bit(STATUS_EXIT_PENDING, &priv->status);
8086
8087         iwl3945_down(priv);
8088
8089         /* make sure we flush any pending irq or
8090          * tasklet for the driver
8091          */
8092         spin_lock_irqsave(&priv->lock, flags);
8093         iwl3945_disable_interrupts(priv);
8094         spin_unlock_irqrestore(&priv->lock, flags);
8095
8096         iwl_synchronize_irq(priv);
8097
8098         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8099
8100         iwl3945_rfkill_unregister(priv);
8101         iwl3945_dealloc_ucode_pci(priv);
8102
8103         if (priv->rxq.bd)
8104                 iwl3945_rx_queue_free(priv, &priv->rxq);
8105         iwl3945_hw_txq_ctx_free(priv);
8106
8107         iwl3945_unset_hw_setting(priv);
8108         iwl3945_clear_stations_table(priv);
8109
8110         if (priv->mac80211_registered)
8111                 ieee80211_unregister_hw(priv->hw);
8112
8113         /*netif_stop_queue(dev); */
8114         flush_workqueue(priv->workqueue);
8115
8116         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8117          * priv->workqueue... so we can't take down the workqueue
8118          * until now... */
8119         destroy_workqueue(priv->workqueue);
8120         priv->workqueue = NULL;
8121
8122         pci_iounmap(pdev, priv->hw_base);
8123         pci_release_regions(pdev);
8124         pci_disable_device(pdev);
8125         pci_set_drvdata(pdev, NULL);
8126
8127         iwl3945_free_channel_map(priv);
8128         iwl3945_free_geos(priv);
8129         kfree(priv->scan);
8130         if (priv->ibss_beacon)
8131                 dev_kfree_skb(priv->ibss_beacon);
8132
8133         ieee80211_free_hw(priv->hw);
8134 }
8135
8136 #ifdef CONFIG_PM
8137
8138 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8139 {
8140         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8141
8142         if (priv->is_open) {
8143                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8144                 iwl3945_mac_stop(priv->hw);
8145                 priv->is_open = 1;
8146         }
8147
8148         pci_set_power_state(pdev, PCI_D3hot);
8149
8150         return 0;
8151 }
8152
8153 static int iwl3945_pci_resume(struct pci_dev *pdev)
8154 {
8155         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8156
8157         pci_set_power_state(pdev, PCI_D0);
8158
8159         if (priv->is_open)
8160                 iwl3945_mac_start(priv->hw);
8161
8162         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8163         return 0;
8164 }
8165
8166 #endif /* CONFIG_PM */
8167
8168 /*************** RFKILL FUNCTIONS **********/
8169 #ifdef CONFIG_IWL3945_RFKILL
8170 /* software rf-kill from user */
8171 static int iwl3945_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
8172 {
8173         struct iwl3945_priv *priv = data;
8174         int err = 0;
8175
8176         if (!priv->rfkill)
8177         return 0;
8178
8179         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
8180                 return 0;
8181
8182         IWL_DEBUG_RF_KILL("we received soft RFKILL set to state %d\n", state);
8183         mutex_lock(&priv->mutex);
8184
8185         switch (state) {
8186         case RFKILL_STATE_UNBLOCKED:
8187                 if (iwl3945_is_rfkill_hw(priv)) {
8188                         err = -EBUSY;
8189                         goto out_unlock;
8190                 }
8191                 iwl3945_radio_kill_sw(priv, 0);
8192                 break;
8193         case RFKILL_STATE_SOFT_BLOCKED:
8194                 iwl3945_radio_kill_sw(priv, 1);
8195                 break;
8196         default:
8197                 IWL_WARNING("we received unexpected RFKILL state %d\n", state);
8198                 break;
8199         }
8200 out_unlock:
8201         mutex_unlock(&priv->mutex);
8202
8203         return err;
8204 }
8205
8206 int iwl3945_rfkill_init(struct iwl3945_priv *priv)
8207 {
8208         struct device *device = wiphy_dev(priv->hw->wiphy);
8209         int ret = 0;
8210
8211         BUG_ON(device == NULL);
8212
8213         IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
8214         priv->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
8215         if (!priv->rfkill) {
8216                 IWL_ERROR("Unable to allocate rfkill device.\n");
8217                 ret = -ENOMEM;
8218                 goto error;
8219         }
8220
8221         priv->rfkill->name = priv->cfg->name;
8222         priv->rfkill->data = priv;
8223         priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
8224         priv->rfkill->toggle_radio = iwl3945_rfkill_soft_rf_kill;
8225         priv->rfkill->user_claim_unsupported = 1;
8226
8227         priv->rfkill->dev.class->suspend = NULL;
8228         priv->rfkill->dev.class->resume = NULL;
8229
8230         ret = rfkill_register(priv->rfkill);
8231         if (ret) {
8232                 IWL_ERROR("Unable to register rfkill: %d\n", ret);
8233                 goto freed_rfkill;
8234         }
8235
8236         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8237         return ret;
8238
8239 freed_rfkill:
8240         if (priv->rfkill != NULL)
8241                 rfkill_free(priv->rfkill);
8242         priv->rfkill = NULL;
8243
8244 error:
8245         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8246         return ret;
8247 }
8248
8249 void iwl3945_rfkill_unregister(struct iwl3945_priv *priv)
8250 {
8251         if (priv->rfkill)
8252                 rfkill_unregister(priv->rfkill);
8253
8254         priv->rfkill = NULL;
8255 }
8256
8257 /* set rf-kill to the right state. */
8258 void iwl3945_rfkill_set_hw_state(struct iwl3945_priv *priv)
8259 {
8260
8261         if (!priv->rfkill)
8262                 return;
8263
8264         if (iwl3945_is_rfkill_hw(priv)) {
8265                 rfkill_force_state(priv->rfkill, RFKILL_STATE_HARD_BLOCKED);
8266                 return;
8267         }
8268
8269         if (!iwl3945_is_rfkill_sw(priv))
8270                 rfkill_force_state(priv->rfkill, RFKILL_STATE_UNBLOCKED);
8271         else
8272                 rfkill_force_state(priv->rfkill, RFKILL_STATE_SOFT_BLOCKED);
8273 }
8274 #endif
8275
8276 /*****************************************************************************
8277  *
8278  * driver and module entry point
8279  *
8280  *****************************************************************************/
8281
8282 static struct pci_driver iwl3945_driver = {
8283         .name = DRV_NAME,
8284         .id_table = iwl3945_hw_card_ids,
8285         .probe = iwl3945_pci_probe,
8286         .remove = __devexit_p(iwl3945_pci_remove),
8287 #ifdef CONFIG_PM
8288         .suspend = iwl3945_pci_suspend,
8289         .resume = iwl3945_pci_resume,
8290 #endif
8291 };
8292
8293 static int __init iwl3945_init(void)
8294 {
8295
8296         int ret;
8297         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8298         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8299
8300         ret = iwl3945_rate_control_register();
8301         if (ret) {
8302                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8303                 return ret;
8304         }
8305
8306         ret = pci_register_driver(&iwl3945_driver);
8307         if (ret) {
8308                 IWL_ERROR("Unable to initialize PCI module\n");
8309                 goto error_register;
8310         }
8311 #ifdef CONFIG_IWL3945_DEBUG
8312         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8313         if (ret) {
8314                 IWL_ERROR("Unable to create driver sysfs file\n");
8315                 goto error_debug;
8316         }
8317 #endif
8318
8319         return ret;
8320
8321 #ifdef CONFIG_IWL3945_DEBUG
8322 error_debug:
8323         pci_unregister_driver(&iwl3945_driver);
8324 #endif
8325 error_register:
8326         iwl3945_rate_control_unregister();
8327         return ret;
8328 }
8329
8330 static void __exit iwl3945_exit(void)
8331 {
8332 #ifdef CONFIG_IWL3945_DEBUG
8333         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8334 #endif
8335         pci_unregister_driver(&iwl3945_driver);
8336         iwl3945_rate_control_unregister();
8337 }
8338
8339 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
8340
8341 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8342 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8343 module_param_named(disable, iwl3945_param_disable, int, 0444);
8344 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8345 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8346 MODULE_PARM_DESC(hwcrypto,
8347                  "using hardware crypto engine (default 0 [software])\n");
8348 module_param_named(debug, iwl3945_param_debug, int, 0444);
8349 MODULE_PARM_DESC(debug, "debug output mask");
8350 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8351 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8352
8353 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8354 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8355
8356 module_exit(iwl3945_exit);
8357 module_init(iwl3945_init);