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  * James P. Ketrenos <ipw2100-admin@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/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.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 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  73 int iwl3945_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  74
  75 /*
  76  * module name, copyright, version, etc.
  77  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  78  */
  79
  80 #define DRV_DESCRIPTION \
  81 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  82
  83 #ifdef CONFIG_IWL3945_DEBUG
  84 #define VD "d"
  85 #else
  86 #define VD
  87 #endif
  88
  89 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  90 #define VS "s"
  91 #else
  92 #define VS
  93 #endif
  94
  95 #define IWLWIFI_VERSION "1.2.26k" VD VS
  96 #define DRV_COPYRIGHT   "Copyright(c) 2003-2008 Intel Corporation"
  97 #define DRV_VERSION     IWLWIFI_VERSION
  98
  99
 100 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 101 MODULE_VERSION(DRV_VERSION);
 102 MODULE_AUTHOR(DRV_COPYRIGHT);
 103 MODULE_LICENSE("GPL");
 104
 105 static __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 106 {
 107         u16 fc = le16_to_cpu(hdr->frame_control);
 108         int hdr_len = ieee80211_get_hdrlen(fc);
 109
 110         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 111                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 112         return NULL;
 113 }
 114
 115 static const struct ieee80211_supported_band *iwl3945_get_band(
 116                 struct iwl3945_priv *priv, enum ieee80211_band band)
 117 {
 118         return priv->hw->wiphy->bands[band];
 119 }
 120
 121 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 122 {
 123         /* Single white space is for Linksys APs */
 124         if (essid_len == 1 && essid[0] == ' ')
 125                 return 1;
 126
 127         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 128         while (essid_len) {
 129                 essid_len--;
 130                 if (essid[essid_len] != '\0')
 131                         return 0;
 132         }
 133
 134         return 1;
 135 }
 136
 137 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 138 {
 139         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 140         const char *s = essid;
 141         char *d = escaped;
 142
 143         if (iwl3945_is_empty_essid(essid, essid_len)) {
 144                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 145                 return escaped;
 146         }
 147
 148         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 149         while (essid_len--) {
 150                 if (*s == '\0') {
 151                         *d++ = '\\';
 152                         *d++ = '0';
 153                         s++;
 154                 } else
 155                         *d++ = *s++;
 156         }
 157         *d = '\0';
 158         return escaped;
 159 }
 160
 161 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 162  * DMA services
 163  *
 164  * Theory of operation
 165  *
 166  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 167  * of buffer descriptors, each of which points to one or more data buffers for
 168  * the device to read from or fill.  Driver and device exchange status of each
 169  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 170  * entries in each circular buffer, to protect against confusing empty and full
 171  * queue states.
 172  *
 173  * The device reads or writes the data in the queues via the device's several
 174  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 175  *
 176  * For Tx queue, there are low mark and high mark limits. If, after queuing
 177  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 178  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 179  * Tx queue resumed.
 180  *
 181  * The 3945 operates with six queues:  One receive queue, one transmit queue
 182  * (#4) for sending commands to the device firmware, and four transmit queues
 183  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 184  ***************************************************/
 185
 186 int iwl3945_queue_space(const struct iwl3945_queue *q)
 187 {
 188         int s = q->read_ptr - q->write_ptr;
 189
 190         if (q->read_ptr > q->write_ptr)
 191                 s -= q->n_bd;
 192
 193         if (s <= 0)
 194                 s += q->n_window;
 195         /* keep some reserve to not confuse empty and full situations */
 196         s -= 2;
 197         if (s < 0)
 198                 s = 0;
 199         return s;
 200 }
 201
 202 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 203 {
 204         return q->write_ptr > q->read_ptr ?
 205                 (i >= q->read_ptr && i < q->write_ptr) :
 206                 !(i < q->read_ptr && i >= q->write_ptr);
 207 }
 208
 209
 210 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 211 {
 212         /* This is for scan command, the big buffer at end of command array */
 213         if (is_huge)
 214                 return q->n_window;     /* must be power of 2 */
 215
 216         /* Otherwise, use normal size buffers */
 217         return index & (q->n_window - 1);
 218 }
 219
 220 /**
 221  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 222  */
 223 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 224                           int count, int slots_num, u32 id)
 225 {
 226         q->n_bd = count;
 227         q->n_window = slots_num;
 228         q->id = id;
 229
 230         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 231          * and iwl_queue_dec_wrap are broken. */
 232         BUG_ON(!is_power_of_2(count));
 233
 234         /* slots_num must be power-of-two size, otherwise
 235          * get_cmd_index is broken. */
 236         BUG_ON(!is_power_of_2(slots_num));
 237
 238         q->low_mark = q->n_window / 4;
 239         if (q->low_mark < 4)
 240                 q->low_mark = 4;
 241
 242         q->high_mark = q->n_window / 8;
 243         if (q->high_mark < 2)
 244                 q->high_mark = 2;
 245
 246         q->write_ptr = q->read_ptr = 0;
 247
 248         return 0;
 249 }
 250
 251 /**
 252  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 253  */
 254 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 255                               struct iwl3945_tx_queue *txq, u32 id)
 256 {
 257         struct pci_dev *dev = priv->pci_dev;
 258
 259         /* Driver private data, only for Tx (not command) queues,
 260          * not shared with device. */
 261         if (id != IWL_CMD_QUEUE_NUM) {
 262                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 263                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 264                 if (!txq->txb) {
 265                         IWL_ERROR("kmalloc for auxiliary BD "
 266                                   "structures failed\n");
 267                         goto error;
 268                 }
 269         } else
 270                 txq->txb = NULL;
 271
 272         /* Circular buffer of transmit frame descriptors (TFDs),
 273          * shared with device */
 274         txq->bd = pci_alloc_consistent(dev,
 275                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 276                         &txq->q.dma_addr);
 277
 278         if (!txq->bd) {
 279                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 280                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 281                 goto error;
 282         }
 283         txq->q.id = id;
 284
 285         return 0;
 286
 287  error:
 288         if (txq->txb) {
 289                 kfree(txq->txb);
 290                 txq->txb = NULL;
 291         }
 292
 293         return -ENOMEM;
 294 }
 295
 296 /**
 297  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 298  */
 299 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 300                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 301 {
 302         struct pci_dev *dev = priv->pci_dev;
 303         int len;
 304         int rc = 0;
 305
 306         /*
 307          * Alloc buffer array for commands (Tx or other types of commands).
 308          * For the command queue (#4), allocate command space + one big
 309          * command for scan, since scan command is very huge; the system will
 310          * not have two scans at the same time, so only one is needed.
 311          * For data Tx queues (all other queues), no super-size command
 312          * space is needed.
 313          */
 314         len = sizeof(struct iwl3945_cmd) * slots_num;
 315         if (txq_id == IWL_CMD_QUEUE_NUM)
 316                 len +=  IWL_MAX_SCAN_SIZE;
 317         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 318         if (!txq->cmd)
 319                 return -ENOMEM;
 320
 321         /* Alloc driver data array and TFD circular buffer */
 322         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 323         if (rc) {
 324                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 325
 326                 return -ENOMEM;
 327         }
 328         txq->need_update = 0;
 329
 330         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 331          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 332         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 333
 334         /* Initialize queue high/low-water, head/tail indexes */
 335         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 336
 337         /* Tell device where to find queue, enable DMA channel. */
 338         iwl3945_hw_tx_queue_init(priv, txq);
 339
 340         return 0;
 341 }
 342
 343 /**
 344  * iwl3945_tx_queue_free - Deallocate DMA queue.
 345  * @txq: Transmit queue to deallocate.
 346  *
 347  * Empty queue by removing and destroying all BD's.
 348  * Free all buffers.
 349  * 0-fill, but do not free "txq" descriptor structure.
 350  */
 351 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 352 {
 353         struct iwl3945_queue *q = &txq->q;
 354         struct pci_dev *dev = priv->pci_dev;
 355         int len;
 356
 357         if (q->n_bd == 0)
 358                 return;
 359
 360         /* first, empty all BD's */
 361         for (; q->write_ptr != q->read_ptr;
 362              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 363                 iwl3945_hw_txq_free_tfd(priv, txq);
 364
 365         len = sizeof(struct iwl3945_cmd) * q->n_window;
 366         if (q->id == IWL_CMD_QUEUE_NUM)
 367                 len += IWL_MAX_SCAN_SIZE;
 368
 369         /* De-alloc array of command/tx buffers */
 370         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 371
 372         /* De-alloc circular buffer of TFDs */
 373         if (txq->q.n_bd)
 374                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 375                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 376
 377         /* De-alloc array of per-TFD driver data */
 378         if (txq->txb) {
 379                 kfree(txq->txb);
 380                 txq->txb = NULL;
 381         }
 382
 383         /* 0-fill queue descriptor structure */
 384         memset(txq, 0, sizeof(*txq));
 385 }
 386
 387 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 388
 389 /*************** STATION TABLE MANAGEMENT ****
 390  * mac80211 should be examined to determine if sta_info is duplicating
 391  * the functionality provided here
 392  */
 393
 394 /**************************************************************/
 395 #if 0 /* temporary disable till we add real remove station */
 396 /**
 397  * iwl3945_remove_station - Remove driver's knowledge of station.
 398  *
 399  * NOTE:  This does not remove station from device's station table.
 400  */
 401 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 402 {
 403         int index = IWL_INVALID_STATION;
 404         int i;
 405         unsigned long flags;
 406
 407         spin_lock_irqsave(&priv->sta_lock, flags);
 408
 409         if (is_ap)
 410                 index = IWL_AP_ID;
 411         else if (is_broadcast_ether_addr(addr))
 412                 index = priv->hw_setting.bcast_sta_id;
 413         else
 414                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 415                         if (priv->stations[i].used &&
 416                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 417                                                 addr)) {
 418                                 index = i;
 419                                 break;
 420                         }
 421
 422         if (unlikely(index == IWL_INVALID_STATION))
 423                 goto out;
 424
 425         if (priv->stations[index].used) {
 426                 priv->stations[index].used = 0;
 427                 priv->num_stations--;
 428         }
 429
 430         BUG_ON(priv->num_stations < 0);
 431
 432 out:
 433         spin_unlock_irqrestore(&priv->sta_lock, flags);
 434         return 0;
 435 }
 436 #endif
 437
 438 /**
 439  * iwl3945_clear_stations_table - Clear the driver's station table
 440  *
 441  * NOTE:  This does not clear or otherwise alter the device's station table.
 442  */
 443 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 444 {
 445         unsigned long flags;
 446
 447         spin_lock_irqsave(&priv->sta_lock, flags);
 448
 449         priv->num_stations = 0;
 450         memset(priv->stations, 0, sizeof(priv->stations));
 451
 452         spin_unlock_irqrestore(&priv->sta_lock, flags);
 453 }
 454
 455 /**
 456  * iwl3945_add_station - Add station to station tables in driver and device
 457  */
 458 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 459 {
 460         int i;
 461         int index = IWL_INVALID_STATION;
 462         struct iwl3945_station_entry *station;
 463         unsigned long flags_spin;
 464         DECLARE_MAC_BUF(mac);
 465         u8 rate;
 466
 467         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 468         if (is_ap)
 469                 index = IWL_AP_ID;
 470         else if (is_broadcast_ether_addr(addr))
 471                 index = priv->hw_setting.bcast_sta_id;
 472         else
 473                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 474                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 475                                                 addr)) {
 476                                 index = i;
 477                                 break;
 478                         }
 479
 480                         if (!priv->stations[i].used &&
 481                             index == IWL_INVALID_STATION)
 482                                 index = i;
 483                 }
 484
 485         /* These two conditions has the same outcome but keep them separate
 486           since they have different meaning */
 487         if (unlikely(index == IWL_INVALID_STATION)) {
 488                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 489                 return index;
 490         }
 491
 492         if (priv->stations[index].used &&
 493            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 494                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 495                 return index;
 496         }
 497
 498         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 499         station = &priv->stations[index];
 500         station->used = 1;
 501         priv->num_stations++;
 502
 503         /* Set up the REPLY_ADD_STA command to send to device */
 504         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 505         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 506         station->sta.mode = 0;
 507         station->sta.sta.sta_id = index;
 508         station->sta.station_flags = 0;
 509
 510         if (priv->band == IEEE80211_BAND_5GHZ)
 511                 rate = IWL_RATE_6M_PLCP;
 512         else
 513                 rate =  IWL_RATE_1M_PLCP;
 514
 515         /* Turn on both antennas for the station... */
 516         station->sta.rate_n_flags =
 517                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 518         station->current_rate.rate_n_flags =
 519                         le16_to_cpu(station->sta.rate_n_flags);
 520
 521         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 522
 523         /* Add station to device's station table */
 524         iwl3945_send_add_station(priv, &station->sta, flags);
 525         return index;
 526
 527 }
 528
 529 /*************** DRIVER STATUS FUNCTIONS   *****/
 530
 531 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 532 {
 533         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 534          * set but EXIT_PENDING is not */
 535         return test_bit(STATUS_READY, &priv->status) &&
 536                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 537                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 538 }
 539
 540 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 541 {
 542         return test_bit(STATUS_ALIVE, &priv->status);
 543 }
 544
 545 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 546 {
 547         return test_bit(STATUS_INIT, &priv->status);
 548 }
 549
 550 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 551 {
 552         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 553                test_bit(STATUS_RF_KILL_SW, &priv->status);
 554 }
 555
 556 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 557 {
 558
 559         if (iwl3945_is_rfkill(priv))
 560                 return 0;
 561
 562         return iwl3945_is_ready(priv);
 563 }
 564
 565 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 566
 567 #define IWL_CMD(x) case x : return #x
 568
 569 static const char *get_cmd_string(u8 cmd)
 570 {
 571         switch (cmd) {
 572                 IWL_CMD(REPLY_ALIVE);
 573                 IWL_CMD(REPLY_ERROR);
 574                 IWL_CMD(REPLY_RXON);
 575                 IWL_CMD(REPLY_RXON_ASSOC);
 576                 IWL_CMD(REPLY_QOS_PARAM);
 577                 IWL_CMD(REPLY_RXON_TIMING);
 578                 IWL_CMD(REPLY_ADD_STA);
 579                 IWL_CMD(REPLY_REMOVE_STA);
 580                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 581                 IWL_CMD(REPLY_3945_RX);
 582                 IWL_CMD(REPLY_TX);
 583                 IWL_CMD(REPLY_RATE_SCALE);
 584                 IWL_CMD(REPLY_LEDS_CMD);
 585                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 586                 IWL_CMD(RADAR_NOTIFICATION);
 587                 IWL_CMD(REPLY_QUIET_CMD);
 588                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 589                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 590                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 591                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 592                 IWL_CMD(POWER_TABLE_CMD);
 593                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 594                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 595                 IWL_CMD(REPLY_SCAN_CMD);
 596                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 597                 IWL_CMD(SCAN_START_NOTIFICATION);
 598                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 599                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 600                 IWL_CMD(BEACON_NOTIFICATION);
 601                 IWL_CMD(REPLY_TX_BEACON);
 602                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 603                 IWL_CMD(QUIET_NOTIFICATION);
 604                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 605                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 606                 IWL_CMD(REPLY_BT_CONFIG);
 607                 IWL_CMD(REPLY_STATISTICS_CMD);
 608                 IWL_CMD(STATISTICS_NOTIFICATION);
 609                 IWL_CMD(REPLY_CARD_STATE_CMD);
 610                 IWL_CMD(CARD_STATE_NOTIFICATION);
 611                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 612         default:
 613                 return "UNKNOWN";
 614
 615         }
 616 }
 617
 618 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 619
 620 /**
 621  * iwl3945_enqueue_hcmd - enqueue a uCode command
 622  * @priv: device private data point
 623  * @cmd: a point to the ucode command structure
 624  *
 625  * The function returns < 0 values to indicate the operation is
 626  * failed. On success, it turns the index (> 0) of command in the
 627  * command queue.
 628  */
 629 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 630 {
 631         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 632         struct iwl3945_queue *q = &txq->q;
 633         struct iwl3945_tfd_frame *tfd;
 634         u32 *control_flags;
 635         struct iwl3945_cmd *out_cmd;
 636         u32 idx;
 637         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 638         dma_addr_t phys_addr;
 639         int pad;
 640         u16 count;
 641         int ret;
 642         unsigned long flags;
 643
 644         /* If any of the command structures end up being larger than
 645          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 646          * we will need to increase the size of the TFD entries */
 647         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 648                !(cmd->meta.flags & CMD_SIZE_HUGE));
 649
 650
 651         if (iwl3945_is_rfkill(priv)) {
 652                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 653                 return -EIO;
 654         }
 655
 656         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 657                 IWL_ERROR("No space for Tx\n");
 658                 return -ENOSPC;
 659         }
 660
 661         spin_lock_irqsave(&priv->hcmd_lock, flags);
 662
 663         tfd = &txq->bd[q->write_ptr];
 664         memset(tfd, 0, sizeof(*tfd));
 665
 666         control_flags = (u32 *) tfd;
 667
 668         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 669         out_cmd = &txq->cmd[idx];
 670
 671         out_cmd->hdr.cmd = cmd->id;
 672         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 673         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 674
 675         /* At this point, the out_cmd now has all of the incoming cmd
 676          * information */
 677
 678         out_cmd->hdr.flags = 0;
 679         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 680                         INDEX_TO_SEQ(q->write_ptr));
 681         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 682                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 683
 684         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 685                         offsetof(struct iwl3945_cmd, hdr);
 686         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 687
 688         pad = U32_PAD(cmd->len);
 689         count = TFD_CTL_COUNT_GET(*control_flags);
 690         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 691
 692         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 693                      "%d bytes at %d[%d]:%d\n",
 694                      get_cmd_string(out_cmd->hdr.cmd),
 695                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 696                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 697
 698         txq->need_update = 1;
 699
 700         /* Increment and update queue's write index */
 701         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 702         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 703
 704         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 705         return ret ? ret : idx;
 706 }
 707
 708 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 709 {
 710         int ret;
 711
 712         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 713
 714         /* An asynchronous command can not expect an SKB to be set. */
 715         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 716
 717         /* An asynchronous command MUST have a callback. */
 718         BUG_ON(!cmd->meta.u.callback);
 719
 720         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 721                 return -EBUSY;
 722
 723         ret = iwl3945_enqueue_hcmd(priv, cmd);
 724         if (ret < 0) {
 725                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 726                           get_cmd_string(cmd->id), ret);
 727                 return ret;
 728         }
 729         return 0;
 730 }
 731
 732 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 733 {
 734         int cmd_idx;
 735         int ret;
 736         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 737
 738         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 739
 740          /* A synchronous command can not have a callback set. */
 741         BUG_ON(cmd->meta.u.callback != NULL);
 742
 743         if (atomic_xchg(&entry, 1)) {
 744                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 745                           get_cmd_string(cmd->id));
 746                 return -EBUSY;
 747         }
 748
 749         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 750
 751         if (cmd->meta.flags & CMD_WANT_SKB)
 752                 cmd->meta.source = &cmd->meta;
 753
 754         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 755         if (cmd_idx < 0) {
 756                 ret = cmd_idx;
 757                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 758                           get_cmd_string(cmd->id), ret);
 759                 goto out;
 760         }
 761
 762         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 763                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 764                         HOST_COMPLETE_TIMEOUT);
 765         if (!ret) {
 766                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 767                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 768                                   get_cmd_string(cmd->id),
 769                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 770
 771                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 772                         ret = -ETIMEDOUT;
 773                         goto cancel;
 774                 }
 775         }
 776
 777         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 778                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 779                                get_cmd_string(cmd->id));
 780                 ret = -ECANCELED;
 781                 goto fail;
 782         }
 783         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 784                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 785                                get_cmd_string(cmd->id));
 786                 ret = -EIO;
 787                 goto fail;
 788         }
 789         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 790                 IWL_ERROR("Error: Response NULL in '%s'\n",
 791                           get_cmd_string(cmd->id));
 792                 ret = -EIO;
 793                 goto out;
 794         }
 795
 796         ret = 0;
 797         goto out;
 798
 799 cancel:
 800         if (cmd->meta.flags & CMD_WANT_SKB) {
 801                 struct iwl3945_cmd *qcmd;
 802
 803                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 804                  * TX cmd queue. Otherwise in case the cmd comes
 805                  * in later, it will possibly set an invalid
 806                  * address (cmd->meta.source). */
 807                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 808                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 809         }
 810 fail:
 811         if (cmd->meta.u.skb) {
 812                 dev_kfree_skb_any(cmd->meta.u.skb);
 813                 cmd->meta.u.skb = NULL;
 814         }
 815 out:
 816         atomic_set(&entry, 0);
 817         return ret;
 818 }
 819
 820 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 821 {
 822         if (cmd->meta.flags & CMD_ASYNC)
 823                 return iwl3945_send_cmd_async(priv, cmd);
 824
 825         return iwl3945_send_cmd_sync(priv, cmd);
 826 }
 827
 828 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 829 {
 830         struct iwl3945_host_cmd cmd = {
 831                 .id = id,
 832                 .len = len,
 833                 .data = data,
 834         };
 835
 836         return iwl3945_send_cmd_sync(priv, &cmd);
 837 }
 838
 839 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 840 {
 841         struct iwl3945_host_cmd cmd = {
 842                 .id = id,
 843                 .len = sizeof(val),
 844                 .data = &val,
 845         };
 846
 847         return iwl3945_send_cmd_sync(priv, &cmd);
 848 }
 849
 850 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 851 {
 852         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 853 }
 854
 855 /**
 856  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 857  * @band: 2.4 or 5 GHz band
 858  * @channel: Any channel valid for the requested band
 859
 860  * In addition to setting the staging RXON, priv->band is also set.
 861  *
 862  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 863  * in the staging RXON flag structure based on the band
 864  */
 865 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 866                                     enum ieee80211_band band,
 867                                     u16 channel)
 868 {
 869         if (!iwl3945_get_channel_info(priv, band, channel)) {
 870                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 871                                channel, band);
 872                 return -EINVAL;
 873         }
 874
 875         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 876             (priv->band == band))
 877                 return 0;
 878
 879         priv->staging_rxon.channel = cpu_to_le16(channel);
 880         if (band == IEEE80211_BAND_5GHZ)
 881                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 882         else
 883                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 884
 885         priv->band = band;
 886
 887         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 888
 889         return 0;
 890 }
 891
 892 /**
 893  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 894  *
 895  * NOTE:  This is really only useful during development and can eventually
 896  * be #ifdef'd out once the driver is stable and folks aren't actively
 897  * making changes
 898  */
 899 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 900 {
 901         int error = 0;
 902         int counter = 1;
 903
 904         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 905                 error |= le32_to_cpu(rxon->flags &
 906                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 907                                  RXON_FLG_RADAR_DETECT_MSK));
 908                 if (error)
 909                         IWL_WARNING("check 24G fields %d | %d\n",
 910                                     counter++, error);
 911         } else {
 912                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 913                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 914                 if (error)
 915                         IWL_WARNING("check 52 fields %d | %d\n",
 916                                     counter++, error);
 917                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 918                 if (error)
 919                         IWL_WARNING("check 52 CCK %d | %d\n",
 920                                     counter++, error);
 921         }
 922         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 923         if (error)
 924                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 925
 926         /* make sure basic rates 6Mbps and 1Mbps are supported */
 927         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 928                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 929         if (error)
 930                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 931
 932         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 933         if (error)
 934                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 935
 936         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 937                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 938         if (error)
 939                 IWL_WARNING("check CCK and short slot %d | %d\n",
 940                             counter++, error);
 941
 942         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 943                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 944         if (error)
 945                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 946                             counter++, error);
 947
 948         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 949                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 950         if (error)
 951                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 952                             counter++, error);
 953
 954         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 955                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 956                                 RXON_FLG_ANT_A_MSK)) == 0);
 957         if (error)
 958                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 959
 960         if (error)
 961                 IWL_WARNING("Tuning to channel %d\n",
 962                             le16_to_cpu(rxon->channel));
 963
 964         if (error) {
 965                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 966                 return -1;
 967         }
 968         return 0;
 969 }
 970
 971 /**
 972  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 973  * @priv: staging_rxon is compared to active_rxon
 974  *
 975  * If the RXON structure is changing enough to require a new tune,
 976  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 977  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 978  */
 979 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
 980 {
 981
 982         /* These items are only settable from the full RXON command */
 983         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 984             compare_ether_addr(priv->staging_rxon.bssid_addr,
 985                                priv->active_rxon.bssid_addr) ||
 986             compare_ether_addr(priv->staging_rxon.node_addr,
 987                                priv->active_rxon.node_addr) ||
 988             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 989                                priv->active_rxon.wlap_bssid_addr) ||
 990             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 991             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 992             (priv->staging_rxon.air_propagation !=
 993              priv->active_rxon.air_propagation) ||
 994             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 995                 return 1;
 996
 997         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 998          * be updated with the RXON_ASSOC command -- however only some
 999          * flag transitions are allowed using RXON_ASSOC */
1000
1001         /* Check if we are not switching bands */
1002         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1003             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1004                 return 1;
1005
1006         /* Check if we are switching association toggle */
1007         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1008                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1009                 return 1;
1010
1011         return 0;
1012 }
1013
1014 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1015 {
1016         int rc = 0;
1017         struct iwl3945_rx_packet *res = NULL;
1018         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1019         struct iwl3945_host_cmd cmd = {
1020                 .id = REPLY_RXON_ASSOC,
1021                 .len = sizeof(rxon_assoc),
1022                 .meta.flags = CMD_WANT_SKB,
1023                 .data = &rxon_assoc,
1024         };
1025         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1026         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1027
1028         if ((rxon1->flags == rxon2->flags) &&
1029             (rxon1->filter_flags == rxon2->filter_flags) &&
1030             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1031             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1032                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1033                 return 0;
1034         }
1035
1036         rxon_assoc.flags = priv->staging_rxon.flags;
1037         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1038         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1039         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1040         rxon_assoc.reserved = 0;
1041
1042         rc = iwl3945_send_cmd_sync(priv, &cmd);
1043         if (rc)
1044                 return rc;
1045
1046         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1047         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1048                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1049                 rc = -EIO;
1050         }
1051
1052         priv->alloc_rxb_skb--;
1053         dev_kfree_skb_any(cmd.meta.u.skb);
1054
1055         return rc;
1056 }
1057
1058 /**
1059  * iwl3945_commit_rxon - commit staging_rxon to hardware
1060  *
1061  * The RXON command in staging_rxon is committed to the hardware and
1062  * the active_rxon structure is updated with the new data.  This
1063  * function correctly transitions out of the RXON_ASSOC_MSK state if
1064  * a HW tune is required based on the RXON structure changes.
1065  */
1066 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1067 {
1068         /* cast away the const for active_rxon in this function */
1069         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1070         int rc = 0;
1071         DECLARE_MAC_BUF(mac);
1072
1073         if (!iwl3945_is_alive(priv))
1074                 return -1;
1075
1076         /* always get timestamp with Rx frame */
1077         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1078
1079         /* select antenna */
1080         priv->staging_rxon.flags &=
1081             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1082         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1083
1084         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1085         if (rc) {
1086                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1087                 return -EINVAL;
1088         }
1089
1090         /* If we don't need to send a full RXON, we can use
1091          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1092          * and other flags for the current radio configuration. */
1093         if (!iwl3945_full_rxon_required(priv)) {
1094                 rc = iwl3945_send_rxon_assoc(priv);
1095                 if (rc) {
1096                         IWL_ERROR("Error setting RXON_ASSOC "
1097                                   "configuration (%d).\n", rc);
1098                         return rc;
1099                 }
1100
1101                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1102
1103                 return 0;
1104         }
1105
1106         /* If we are currently associated and the new config requires
1107          * an RXON_ASSOC and the new config wants the associated mask enabled,
1108          * we must clear the associated from the active configuration
1109          * before we apply the new config */
1110         if (iwl3945_is_associated(priv) &&
1111             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1112                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1113                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1114
1115                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1116                                       sizeof(struct iwl3945_rxon_cmd),
1117                                       &priv->active_rxon);
1118
1119                 /* If the mask clearing failed then we set
1120                  * active_rxon back to what it was previously */
1121                 if (rc) {
1122                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1123                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1124                                   "configuration (%d).\n", rc);
1125                         return rc;
1126                 }
1127         }
1128
1129         IWL_DEBUG_INFO("Sending RXON\n"
1130                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1131                        "* channel = %d\n"
1132                        "* bssid = %s\n",
1133                        ((priv->staging_rxon.filter_flags &
1134                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1135                        le16_to_cpu(priv->staging_rxon.channel),
1136                        print_mac(mac, priv->staging_rxon.bssid_addr));
1137
1138         /* Apply the new configuration */
1139         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1140                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1141         if (rc) {
1142                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1143                 return rc;
1144         }
1145
1146         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1147
1148         iwl3945_clear_stations_table(priv);
1149
1150         /* If we issue a new RXON command which required a tune then we must
1151          * send a new TXPOWER command or we won't be able to Tx any frames */
1152         rc = iwl3945_hw_reg_send_txpower(priv);
1153         if (rc) {
1154                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1155                 return rc;
1156         }
1157
1158         /* Add the broadcast address so we can send broadcast frames */
1159         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1160             IWL_INVALID_STATION) {
1161                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1162                 return -EIO;
1163         }
1164
1165         /* If we have set the ASSOC_MSK and we are in BSS mode then
1166          * add the IWL_AP_ID to the station rate table */
1167         if (iwl3945_is_associated(priv) &&
1168             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1169                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1170                     == IWL_INVALID_STATION) {
1171                         IWL_ERROR("Error adding AP address for transmit.\n");
1172                         return -EIO;
1173                 }
1174
1175         /* Init the hardware's rate fallback order based on the band */
1176         rc = iwl3945_init_hw_rate_table(priv);
1177         if (rc) {
1178                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1179                 return -EIO;
1180         }
1181
1182         return 0;
1183 }
1184
1185 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1186 {
1187         struct iwl3945_bt_cmd bt_cmd = {
1188                 .flags = 3,
1189                 .lead_time = 0xAA,
1190                 .max_kill = 1,
1191                 .kill_ack_mask = 0,
1192                 .kill_cts_mask = 0,
1193         };
1194
1195         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1196                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1197 }
1198
1199 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1200 {
1201         int rc = 0;
1202         struct iwl3945_rx_packet *res;
1203         struct iwl3945_host_cmd cmd = {
1204                 .id = REPLY_SCAN_ABORT_CMD,
1205                 .meta.flags = CMD_WANT_SKB,
1206         };
1207
1208         /* If there isn't a scan actively going on in the hardware
1209          * then we are in between scan bands and not actually
1210          * actively scanning, so don't send the abort command */
1211         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1212                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1213                 return 0;
1214         }
1215
1216         rc = iwl3945_send_cmd_sync(priv, &cmd);
1217         if (rc) {
1218                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1219                 return rc;
1220         }
1221
1222         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1223         if (res->u.status != CAN_ABORT_STATUS) {
1224                 /* The scan abort will return 1 for success or
1225                  * 2 for "failure".  A failure condition can be
1226                  * due to simply not being in an active scan which
1227                  * can occur if we send the scan abort before we
1228                  * the microcode has notified us that a scan is
1229                  * completed. */
1230                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1231                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1232                 clear_bit(STATUS_SCAN_HW, &priv->status);
1233         }
1234
1235         dev_kfree_skb_any(cmd.meta.u.skb);
1236
1237         return rc;
1238 }
1239
1240 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1241                                         struct iwl3945_cmd *cmd,
1242                                         struct sk_buff *skb)
1243 {
1244         return 1;
1245 }
1246
1247 /*
1248  * CARD_STATE_CMD
1249  *
1250  * Use: Sets the device's internal card state to enable, disable, or halt
1251  *
1252  * When in the 'enable' state the card operates as normal.
1253  * When in the 'disable' state, the card enters into a low power mode.
1254  * When in the 'halt' state, the card is shut down and must be fully
1255  * restarted to come back on.
1256  */
1257 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1258 {
1259         struct iwl3945_host_cmd cmd = {
1260                 .id = REPLY_CARD_STATE_CMD,
1261                 .len = sizeof(u32),
1262                 .data = &flags,
1263                 .meta.flags = meta_flag,
1264         };
1265
1266         if (meta_flag & CMD_ASYNC)
1267                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1268
1269         return iwl3945_send_cmd(priv, &cmd);
1270 }
1271
1272 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1273                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1274 {
1275         struct iwl3945_rx_packet *res = NULL;
1276
1277         if (!skb) {
1278                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1279                 return 1;
1280         }
1281
1282         res = (struct iwl3945_rx_packet *)skb->data;
1283         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1284                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1285                           res->hdr.flags);
1286                 return 1;
1287         }
1288
1289         switch (res->u.add_sta.status) {
1290         case ADD_STA_SUCCESS_MSK:
1291                 break;
1292         default:
1293                 break;
1294         }
1295
1296         /* We didn't cache the SKB; let the caller free it */
1297         return 1;
1298 }
1299
1300 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1301                          struct iwl3945_addsta_cmd *sta, u8 flags)
1302 {
1303         struct iwl3945_rx_packet *res = NULL;
1304         int rc = 0;
1305         struct iwl3945_host_cmd cmd = {
1306                 .id = REPLY_ADD_STA,
1307                 .len = sizeof(struct iwl3945_addsta_cmd),
1308                 .meta.flags = flags,
1309                 .data = sta,
1310         };
1311
1312         if (flags & CMD_ASYNC)
1313                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1314         else
1315                 cmd.meta.flags |= CMD_WANT_SKB;
1316
1317         rc = iwl3945_send_cmd(priv, &cmd);
1318
1319         if (rc || (flags & CMD_ASYNC))
1320                 return rc;
1321
1322         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1323         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1324                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1325                           res->hdr.flags);
1326                 rc = -EIO;
1327         }
1328
1329         if (rc == 0) {
1330                 switch (res->u.add_sta.status) {
1331                 case ADD_STA_SUCCESS_MSK:
1332                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1333                         break;
1334                 default:
1335                         rc = -EIO;
1336                         IWL_WARNING("REPLY_ADD_STA failed\n");
1337                         break;
1338                 }
1339         }
1340
1341         priv->alloc_rxb_skb--;
1342         dev_kfree_skb_any(cmd.meta.u.skb);
1343
1344         return rc;
1345 }
1346
1347 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1348                                    struct ieee80211_key_conf *keyconf,
1349                                    u8 sta_id)
1350 {
1351         unsigned long flags;
1352         __le16 key_flags = 0;
1353
1354         switch (keyconf->alg) {
1355         case ALG_CCMP:
1356                 key_flags |= STA_KEY_FLG_CCMP;
1357                 key_flags |= cpu_to_le16(
1358                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1359                 key_flags &= ~STA_KEY_FLG_INVALID;
1360                 break;
1361         case ALG_TKIP:
1362         case ALG_WEP:
1363         default:
1364                 return -EINVAL;
1365         }
1366         spin_lock_irqsave(&priv->sta_lock, flags);
1367         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1368         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1369         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1370                keyconf->keylen);
1371
1372         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1373                keyconf->keylen);
1374         priv->stations[sta_id].sta.key.key_flags = key_flags;
1375         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1376         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1377
1378         spin_unlock_irqrestore(&priv->sta_lock, flags);
1379
1380         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1381         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1382         return 0;
1383 }
1384
1385 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1386 {
1387         unsigned long flags;
1388
1389         spin_lock_irqsave(&priv->sta_lock, flags);
1390         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1391         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1392         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1393         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1394         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1395         spin_unlock_irqrestore(&priv->sta_lock, flags);
1396
1397         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1398         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1399         return 0;
1400 }
1401
1402 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1403 {
1404         struct list_head *element;
1405
1406         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1407                        priv->frames_count);
1408
1409         while (!list_empty(&priv->free_frames)) {
1410                 element = priv->free_frames.next;
1411                 list_del(element);
1412                 kfree(list_entry(element, struct iwl3945_frame, list));
1413                 priv->frames_count--;
1414         }
1415
1416         if (priv->frames_count) {
1417                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1418                             priv->frames_count);
1419                 priv->frames_count = 0;
1420         }
1421 }
1422
1423 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1424 {
1425         struct iwl3945_frame *frame;
1426         struct list_head *element;
1427         if (list_empty(&priv->free_frames)) {
1428                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1429                 if (!frame) {
1430                         IWL_ERROR("Could not allocate frame!\n");
1431                         return NULL;
1432                 }
1433
1434                 priv->frames_count++;
1435                 return frame;
1436         }
1437
1438         element = priv->free_frames.next;
1439         list_del(element);
1440         return list_entry(element, struct iwl3945_frame, list);
1441 }
1442
1443 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1444 {
1445         memset(frame, 0, sizeof(*frame));
1446         list_add(&frame->list, &priv->free_frames);
1447 }
1448
1449 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1450                                 struct ieee80211_hdr *hdr,
1451                                 const u8 *dest, int left)
1452 {
1453
1454         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1455             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1456              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1457                 return 0;
1458
1459         if (priv->ibss_beacon->len > left)
1460                 return 0;
1461
1462         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1463
1464         return priv->ibss_beacon->len;
1465 }
1466
1467 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1468 {
1469         u8 i;
1470
1471         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1472              i = iwl3945_rates[i].next_ieee) {
1473                 if (rate_mask & (1 << i))
1474                         return iwl3945_rates[i].plcp;
1475         }
1476
1477         return IWL_RATE_INVALID;
1478 }
1479
1480 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1481 {
1482         struct iwl3945_frame *frame;
1483         unsigned int frame_size;
1484         int rc;
1485         u8 rate;
1486
1487         frame = iwl3945_get_free_frame(priv);
1488
1489         if (!frame) {
1490                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1491                           "command.\n");
1492                 return -ENOMEM;
1493         }
1494
1495         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1496                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1497                                                 0xFF0);
1498                 if (rate == IWL_INVALID_RATE)
1499                         rate = IWL_RATE_6M_PLCP;
1500         } else {
1501                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1502                 if (rate == IWL_INVALID_RATE)
1503                         rate = IWL_RATE_1M_PLCP;
1504         }
1505
1506         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1507
1508         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1509                               &frame->u.cmd[0]);
1510
1511         iwl3945_free_frame(priv, frame);
1512
1513         return rc;
1514 }
1515
1516 /******************************************************************************
1517  *
1518  * EEPROM related functions
1519  *
1520  ******************************************************************************/
1521
1522 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1523 {
1524         memcpy(mac, priv->eeprom.mac_address, 6);
1525 }
1526
1527 /*
1528  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1529  * embedded controller) as EEPROM reader; each read is a series of pulses
1530  * to/from the EEPROM chip, not a single event, so even reads could conflict
1531  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1532  * simply claims ownership, which should be safe when this function is called
1533  * (i.e. before loading uCode!).
1534  */
1535 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1536 {
1537         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1538         return 0;
1539 }
1540
1541 /**
1542  * iwl3945_eeprom_init - read EEPROM contents
1543  *
1544  * Load the EEPROM contents from adapter into priv->eeprom
1545  *
1546  * NOTE:  This routine uses the non-debug IO access functions.
1547  */
1548 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1549 {
1550         u16 *e = (u16 *)&priv->eeprom;
1551         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1552         u32 r;
1553         int sz = sizeof(priv->eeprom);
1554         int rc;
1555         int i;
1556         u16 addr;
1557
1558         /* The EEPROM structure has several padding buffers within it
1559          * and when adding new EEPROM maps is subject to programmer errors
1560          * which may be very difficult to identify without explicitly
1561          * checking the resulting size of the eeprom map. */
1562         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1563
1564         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1565                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1566                 return -ENOENT;
1567         }
1568
1569         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1570         rc = iwl3945_eeprom_acquire_semaphore(priv);
1571         if (rc < 0) {
1572                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1573                 return -ENOENT;
1574         }
1575
1576         /* eeprom is an array of 16bit values */
1577         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1578                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1579                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1580
1581                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1582                                         i += IWL_EEPROM_ACCESS_DELAY) {
1583                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1584                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1585                                 break;
1586                         udelay(IWL_EEPROM_ACCESS_DELAY);
1587                 }
1588
1589                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1590                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1591                         return -ETIMEDOUT;
1592                 }
1593                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1594         }
1595
1596         return 0;
1597 }
1598
1599 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1600 {
1601         if (priv->hw_setting.shared_virt)
1602                 pci_free_consistent(priv->pci_dev,
1603                                     sizeof(struct iwl3945_shared),
1604                                     priv->hw_setting.shared_virt,
1605                                     priv->hw_setting.shared_phys);
1606 }
1607
1608 /**
1609  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1610  *
1611  * return : set the bit for each supported rate insert in ie
1612  */
1613 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1614                                     u16 basic_rate, int *left)
1615 {
1616         u16 ret_rates = 0, bit;
1617         int i;
1618         u8 *cnt = ie;
1619         u8 *rates = ie + 1;
1620
1621         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1622                 if (bit & supported_rate) {
1623                         ret_rates |= bit;
1624                         rates[*cnt] = iwl3945_rates[i].ieee |
1625                                 ((bit & basic_rate) ? 0x80 : 0x00);
1626                         (*cnt)++;
1627                         (*left)--;
1628                         if ((*left <= 0) ||
1629                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1630                                 break;
1631                 }
1632         }
1633
1634         return ret_rates;
1635 }
1636
1637 /**
1638  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1639  */
1640 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1641                               struct ieee80211_mgmt *frame,
1642                               int left, int is_direct)
1643 {
1644         int len = 0;
1645         u8 *pos = NULL;
1646         u16 active_rates, ret_rates, cck_rates;
1647
1648         /* Make sure there is enough space for the probe request,
1649          * two mandatory IEs and the data */
1650         left -= 24;
1651         if (left < 0)
1652                 return 0;
1653         len += 24;
1654
1655         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1656         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1657         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1658         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1659         frame->seq_ctrl = 0;
1660
1661         /* fill in our indirect SSID IE */
1662         /* ...next IE... */
1663
1664         left -= 2;
1665         if (left < 0)
1666                 return 0;
1667         len += 2;
1668         pos = &(frame->u.probe_req.variable[0]);
1669         *pos++ = WLAN_EID_SSID;
1670         *pos++ = 0;
1671
1672         /* fill in our direct SSID IE... */
1673         if (is_direct) {
1674                 /* ...next IE... */
1675                 left -= 2 + priv->essid_len;
1676                 if (left < 0)
1677                         return 0;
1678                 /* ... fill it in... */
1679                 *pos++ = WLAN_EID_SSID;
1680                 *pos++ = priv->essid_len;
1681                 memcpy(pos, priv->essid, priv->essid_len);
1682                 pos += priv->essid_len;
1683                 len += 2 + priv->essid_len;
1684         }
1685
1686         /* fill in supported rate */
1687         /* ...next IE... */
1688         left -= 2;
1689         if (left < 0)
1690                 return 0;
1691
1692         /* ... fill it in... */
1693         *pos++ = WLAN_EID_SUPP_RATES;
1694         *pos = 0;
1695
1696         priv->active_rate = priv->rates_mask;
1697         active_rates = priv->active_rate;
1698         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1699
1700         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1701         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1702                         priv->active_rate_basic, &left);
1703         active_rates &= ~ret_rates;
1704
1705         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1706                                  priv->active_rate_basic, &left);
1707         active_rates &= ~ret_rates;
1708
1709         len += 2 + *pos;
1710         pos += (*pos) + 1;
1711         if (active_rates == 0)
1712                 goto fill_end;
1713
1714         /* fill in supported extended rate */
1715         /* ...next IE... */
1716         left -= 2;
1717         if (left < 0)
1718                 return 0;
1719         /* ... fill it in... */
1720         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1721         *pos = 0;
1722         iwl3945_supported_rate_to_ie(pos, active_rates,
1723                                  priv->active_rate_basic, &left);
1724         if (*pos > 0)
1725                 len += 2 + *pos;
1726
1727  fill_end:
1728         return (u16)len;
1729 }
1730
1731 /*
1732  * QoS  support
1733 */
1734 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1735                                        struct iwl3945_qosparam_cmd *qos)
1736 {
1737
1738         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1739                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1740 }
1741
1742 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1743 {
1744         u16 cw_min = 15;
1745         u16 cw_max = 1023;
1746         u8 aifs = 2;
1747         u8 is_legacy = 0;
1748         unsigned long flags;
1749         int i;
1750
1751         spin_lock_irqsave(&priv->lock, flags);
1752         priv->qos_data.qos_active = 0;
1753
1754         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1755                 if (priv->qos_data.qos_enable)
1756                         priv->qos_data.qos_active = 1;
1757                 if (!(priv->active_rate & 0xfff0)) {
1758                         cw_min = 31;
1759                         is_legacy = 1;
1760                 }
1761         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1762                 if (priv->qos_data.qos_enable)
1763                         priv->qos_data.qos_active = 1;
1764         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1765                 cw_min = 31;
1766                 is_legacy = 1;
1767         }
1768
1769         if (priv->qos_data.qos_active)
1770                 aifs = 3;
1771
1772         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1773         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1774         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1775         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1776         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1777
1778         if (priv->qos_data.qos_active) {
1779                 i = 1;
1780                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1781                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1782                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1783                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1784                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1785
1786                 i = 2;
1787                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1788                         cpu_to_le16((cw_min + 1) / 2 - 1);
1789                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1790                         cpu_to_le16(cw_max);
1791                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1792                 if (is_legacy)
1793                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1794                                 cpu_to_le16(6016);
1795                 else
1796                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1797                                 cpu_to_le16(3008);
1798                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1799
1800                 i = 3;
1801                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1802                         cpu_to_le16((cw_min + 1) / 4 - 1);
1803                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1804                         cpu_to_le16((cw_max + 1) / 2 - 1);
1805                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1806                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1807                 if (is_legacy)
1808                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1809                                 cpu_to_le16(3264);
1810                 else
1811                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1812                                 cpu_to_le16(1504);
1813         } else {
1814                 for (i = 1; i < 4; i++) {
1815                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1816                                 cpu_to_le16(cw_min);
1817                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1818                                 cpu_to_le16(cw_max);
1819                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1820                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1821                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1822                 }
1823         }
1824         IWL_DEBUG_QOS("set QoS to default \n");
1825
1826         spin_unlock_irqrestore(&priv->lock, flags);
1827 }
1828
1829 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
1830 {
1831         unsigned long flags;
1832
1833         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1834                 return;
1835
1836         if (!priv->qos_data.qos_enable)
1837                 return;
1838
1839         spin_lock_irqsave(&priv->lock, flags);
1840         priv->qos_data.def_qos_parm.qos_flags = 0;
1841
1842         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1843             !priv->qos_data.qos_cap.q_AP.txop_request)
1844                 priv->qos_data.def_qos_parm.qos_flags |=
1845                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1846
1847         if (priv->qos_data.qos_active)
1848                 priv->qos_data.def_qos_parm.qos_flags |=
1849                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1850
1851         spin_unlock_irqrestore(&priv->lock, flags);
1852
1853         if (force || iwl3945_is_associated(priv)) {
1854                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1855                               priv->qos_data.qos_active);
1856
1857                 iwl3945_send_qos_params_command(priv,
1858                                 &(priv->qos_data.def_qos_parm));
1859         }
1860 }
1861
1862 /*
1863  * Power management (not Tx power!) functions
1864  */
1865 #define MSEC_TO_USEC 1024
1866
1867 #define NOSLP __constant_cpu_to_le32(0)
1868 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
1869 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1870 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1871                                      __constant_cpu_to_le32(X1), \
1872                                      __constant_cpu_to_le32(X2), \
1873                                      __constant_cpu_to_le32(X3), \
1874                                      __constant_cpu_to_le32(X4)}
1875
1876
1877 /* default power management (not Tx power) table values */
1878 /* for tim  0-10 */
1879 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
1880         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1881         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1882         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1883         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1884         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1885         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1886 };
1887
1888 /* for tim > 10 */
1889 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
1890         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1891         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1892                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1893         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1894                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1895         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1896                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1897         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1898         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1899                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1900 };
1901
1902 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
1903 {
1904         int rc = 0, i;
1905         struct iwl3945_power_mgr *pow_data;
1906         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
1907         u16 pci_pm;
1908
1909         IWL_DEBUG_POWER("Initialize power \n");
1910
1911         pow_data = &(priv->power_data);
1912
1913         memset(pow_data, 0, sizeof(*pow_data));
1914
1915         pow_data->active_index = IWL_POWER_RANGE_0;
1916         pow_data->dtim_val = 0xffff;
1917
1918         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1919         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1920
1921         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1922         if (rc != 0)
1923                 return 0;
1924         else {
1925                 struct iwl3945_powertable_cmd *cmd;
1926
1927                 IWL_DEBUG_POWER("adjust power command flags\n");
1928
1929                 for (i = 0; i < IWL_POWER_AC; i++) {
1930                         cmd = &pow_data->pwr_range_0[i].cmd;
1931
1932                         if (pci_pm & 0x1)
1933                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1934                         else
1935                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1936                 }
1937         }
1938         return rc;
1939 }
1940
1941 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
1942                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
1943 {
1944         int rc = 0, i;
1945         u8 skip;
1946         u32 max_sleep = 0;
1947         struct iwl3945_power_vec_entry *range;
1948         u8 period = 0;
1949         struct iwl3945_power_mgr *pow_data;
1950
1951         if (mode > IWL_POWER_INDEX_5) {
1952                 IWL_DEBUG_POWER("Error invalid power mode \n");
1953                 return -1;
1954         }
1955         pow_data = &(priv->power_data);
1956
1957         if (pow_data->active_index == IWL_POWER_RANGE_0)
1958                 range = &pow_data->pwr_range_0[0];
1959         else
1960                 range = &pow_data->pwr_range_1[1];
1961
1962         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1963
1964 #ifdef IWL_MAC80211_DISABLE
1965         if (priv->assoc_network != NULL) {
1966                 unsigned long flags;
1967
1968                 period = priv->assoc_network->tim.tim_period;
1969         }
1970 #endif  /*IWL_MAC80211_DISABLE */
1971         skip = range[mode].no_dtim;
1972
1973         if (period == 0) {
1974                 period = 1;
1975                 skip = 0;
1976         }
1977
1978         if (skip == 0) {
1979                 max_sleep = period;
1980                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1981         } else {
1982                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1983                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1984                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1985         }
1986
1987         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1988                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1989                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1990         }
1991
1992         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1993         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1994         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1995         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1996                         le32_to_cpu(cmd->sleep_interval[0]),
1997                         le32_to_cpu(cmd->sleep_interval[1]),
1998                         le32_to_cpu(cmd->sleep_interval[2]),
1999                         le32_to_cpu(cmd->sleep_interval[3]),
2000                         le32_to_cpu(cmd->sleep_interval[4]));
2001
2002         return rc;
2003 }
2004
2005 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2006 {
2007         u32 uninitialized_var(final_mode);
2008         int rc;
2009         struct iwl3945_powertable_cmd cmd;
2010
2011         /* If on battery, set to 3,
2012          * if plugged into AC power, set to CAM ("continuously aware mode"),
2013          * else user level */
2014         switch (mode) {
2015         case IWL_POWER_BATTERY:
2016                 final_mode = IWL_POWER_INDEX_3;
2017                 break;
2018         case IWL_POWER_AC:
2019                 final_mode = IWL_POWER_MODE_CAM;
2020                 break;
2021         default:
2022                 final_mode = mode;
2023                 break;
2024         }
2025
2026         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2027
2028         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2029
2030         if (final_mode == IWL_POWER_MODE_CAM)
2031                 clear_bit(STATUS_POWER_PMI, &priv->status);
2032         else
2033                 set_bit(STATUS_POWER_PMI, &priv->status);
2034
2035         return rc;
2036 }
2037
2038 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2039 {
2040         /* Filter incoming packets to determine if they are targeted toward
2041          * this network, discarding packets coming from ourselves */
2042         switch (priv->iw_mode) {
2043         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2044                 /* packets from our adapter are dropped (echo) */
2045                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2046                         return 0;
2047                 /* {broad,multi}cast packets to our IBSS go through */
2048                 if (is_multicast_ether_addr(header->addr1))
2049                         return !compare_ether_addr(header->addr3, priv->bssid);
2050                 /* packets to our adapter go through */
2051                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2052         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2053                 /* packets from our adapter are dropped (echo) */
2054                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2055                         return 0;
2056                 /* {broad,multi}cast packets to our BSS go through */
2057                 if (is_multicast_ether_addr(header->addr1))
2058                         return !compare_ether_addr(header->addr2, priv->bssid);
2059                 /* packets to our adapter go through */
2060                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2061         }
2062
2063         return 1;
2064 }
2065
2066 /**
2067  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2068  *
2069  * NOTE: priv->mutex is not required before calling this function
2070  */
2071 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2072 {
2073         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2074                 clear_bit(STATUS_SCANNING, &priv->status);
2075                 return 0;
2076         }
2077
2078         if (test_bit(STATUS_SCANNING, &priv->status)) {
2079                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2080                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2081                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2082                         queue_work(priv->workqueue, &priv->abort_scan);
2083
2084                 } else
2085                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2086
2087                 return test_bit(STATUS_SCANNING, &priv->status);
2088         }
2089
2090         return 0;
2091 }
2092
2093 /**
2094  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2095  * @ms: amount of time to wait (in milliseconds) for scan to abort
2096  *
2097  * NOTE: priv->mutex must be held before calling this function
2098  */
2099 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2100 {
2101         unsigned long now = jiffies;
2102         int ret;
2103
2104         ret = iwl3945_scan_cancel(priv);
2105         if (ret && ms) {
2106                 mutex_unlock(&priv->mutex);
2107                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2108                                 test_bit(STATUS_SCANNING, &priv->status))
2109                         msleep(1);
2110                 mutex_lock(&priv->mutex);
2111
2112                 return test_bit(STATUS_SCANNING, &priv->status);
2113         }
2114
2115         return ret;
2116 }
2117
2118 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2119 {
2120         /* Reset ieee stats */
2121
2122         /* We don't reset the net_device_stats (ieee->stats) on
2123          * re-association */
2124
2125         priv->last_seq_num = -1;
2126         priv->last_frag_num = -1;
2127         priv->last_packet_time = 0;
2128
2129         iwl3945_scan_cancel(priv);
2130 }
2131
2132 #define MAX_UCODE_BEACON_INTERVAL       1024
2133 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2134
2135 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2136 {
2137         u16 new_val = 0;
2138         u16 beacon_factor = 0;
2139
2140         beacon_factor =
2141             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2142                 / MAX_UCODE_BEACON_INTERVAL;
2143         new_val = beacon_val / beacon_factor;
2144
2145         return cpu_to_le16(new_val);
2146 }
2147
2148 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2149 {
2150         u64 interval_tm_unit;
2151         u64 tsf, result;
2152         unsigned long flags;
2153         struct ieee80211_conf *conf = NULL;
2154         u16 beacon_int = 0;
2155
2156         conf = ieee80211_get_hw_conf(priv->hw);
2157
2158         spin_lock_irqsave(&priv->lock, flags);
2159         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2160         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2161
2162         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2163
2164         tsf = priv->timestamp1;
2165         tsf = ((tsf << 32) | priv->timestamp0);
2166
2167         beacon_int = priv->beacon_int;
2168         spin_unlock_irqrestore(&priv->lock, flags);
2169
2170         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2171                 if (beacon_int == 0) {
2172                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2173                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2174                 } else {
2175                         priv->rxon_timing.beacon_interval =
2176                                 cpu_to_le16(beacon_int);
2177                         priv->rxon_timing.beacon_interval =
2178                             iwl3945_adjust_beacon_interval(
2179                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2180                 }
2181
2182                 priv->rxon_timing.atim_window = 0;
2183         } else {
2184                 priv->rxon_timing.beacon_interval =
2185                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2186                 /* TODO: we need to get atim_window from upper stack
2187                  * for now we set to 0 */
2188                 priv->rxon_timing.atim_window = 0;
2189         }
2190
2191         interval_tm_unit =
2192                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2193         result = do_div(tsf, interval_tm_unit);
2194         priv->rxon_timing.beacon_init_val =
2195             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2196
2197         IWL_DEBUG_ASSOC
2198             ("beacon interval %d beacon timer %d beacon tim %d\n",
2199                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2200                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2201                 le16_to_cpu(priv->rxon_timing.atim_window));
2202 }
2203
2204 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2205 {
2206         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2207                 IWL_ERROR("APs don't scan.\n");
2208                 return 0;
2209         }
2210
2211         if (!iwl3945_is_ready_rf(priv)) {
2212                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2213                 return -EIO;
2214         }
2215
2216         if (test_bit(STATUS_SCANNING, &priv->status)) {
2217                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2218                 return -EAGAIN;
2219         }
2220
2221         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2222                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2223                                "Queuing.\n");
2224                 return -EAGAIN;
2225         }
2226
2227         IWL_DEBUG_INFO("Starting scan...\n");
2228         priv->scan_bands = 2;
2229         set_bit(STATUS_SCANNING, &priv->status);
2230         priv->scan_start = jiffies;
2231         priv->scan_pass_start = priv->scan_start;
2232
2233         queue_work(priv->workqueue, &priv->request_scan);
2234
2235         return 0;
2236 }
2237
2238 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2239 {
2240         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2241
2242         if (hw_decrypt)
2243                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2244         else
2245                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2246
2247         return 0;
2248 }
2249
2250 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2251                                           enum ieee80211_band band)
2252 {
2253         if (band == IEEE80211_BAND_5GHZ) {
2254                 priv->staging_rxon.flags &=
2255                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2256                       | RXON_FLG_CCK_MSK);
2257                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2258         } else {
2259                 /* Copied from iwl3945_bg_post_associate() */
2260                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2261                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2262                 else
2263                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2264
2265                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2266                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2267
2268                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2269                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2270                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2271         }
2272 }
2273
2274 /*
2275  * initialize rxon structure with default values from eeprom
2276  */
2277 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2278 {
2279         const struct iwl3945_channel_info *ch_info;
2280
2281         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2282
2283         switch (priv->iw_mode) {
2284         case IEEE80211_IF_TYPE_AP:
2285                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2286                 break;
2287
2288         case IEEE80211_IF_TYPE_STA:
2289                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2290                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2291                 break;
2292
2293         case IEEE80211_IF_TYPE_IBSS:
2294                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2295                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2296                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2297                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2298                 break;
2299
2300         case IEEE80211_IF_TYPE_MNTR:
2301                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2302                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2303                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2304                 break;
2305         }
2306
2307 #if 0
2308         /* TODO:  Figure out when short_preamble would be set and cache from
2309          * that */
2310         if (!hw_to_local(priv->hw)->short_preamble)
2311                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2312         else
2313                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2314 #endif
2315
2316         ch_info = iwl3945_get_channel_info(priv, priv->band,
2317                                        le16_to_cpu(priv->staging_rxon.channel));
2318
2319         if (!ch_info)
2320                 ch_info = &priv->channel_info[0];
2321
2322         /*
2323          * in some case A channels are all non IBSS
2324          * in this case force B/G channel
2325          */
2326         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2327             !(is_channel_ibss(ch_info)))
2328                 ch_info = &priv->channel_info[0];
2329
2330         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2331         if (is_channel_a_band(ch_info))
2332                 priv->band = IEEE80211_BAND_5GHZ;
2333         else
2334                 priv->band = IEEE80211_BAND_2GHZ;
2335
2336         iwl3945_set_flags_for_phymode(priv, priv->band);
2337
2338         priv->staging_rxon.ofdm_basic_rates =
2339             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2340         priv->staging_rxon.cck_basic_rates =
2341             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2342 }
2343
2344 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2345 {
2346         if (mode == IEEE80211_IF_TYPE_IBSS) {
2347                 const struct iwl3945_channel_info *ch_info;
2348
2349                 ch_info = iwl3945_get_channel_info(priv,
2350                         priv->band,
2351                         le16_to_cpu(priv->staging_rxon.channel));
2352
2353                 if (!ch_info || !is_channel_ibss(ch_info)) {
2354                         IWL_ERROR("channel %d not IBSS channel\n",
2355                                   le16_to_cpu(priv->staging_rxon.channel));
2356                         return -EINVAL;
2357                 }
2358         }
2359
2360         priv->iw_mode = mode;
2361
2362         iwl3945_connection_init_rx_config(priv);
2363         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2364
2365         iwl3945_clear_stations_table(priv);
2366
2367         /* dont commit rxon if rf-kill is on*/
2368         if (!iwl3945_is_ready_rf(priv))
2369                 return -EAGAIN;
2370
2371         cancel_delayed_work(&priv->scan_check);
2372         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2373                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2374                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2375                 return -EAGAIN;
2376         }
2377
2378         iwl3945_commit_rxon(priv);
2379
2380         return 0;
2381 }
2382
2383 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2384                                       struct ieee80211_tx_control *ctl,
2385                                       struct iwl3945_cmd *cmd,
2386                                       struct sk_buff *skb_frag,
2387                                       int last_frag)
2388 {
2389         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2390
2391         switch (keyinfo->alg) {
2392         case ALG_CCMP:
2393                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2394                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2395                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2396                 break;
2397
2398         case ALG_TKIP:
2399 #if 0
2400                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2401
2402                 if (last_frag)
2403                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2404                                8);
2405                 else
2406                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2407 #endif
2408                 break;
2409
2410         case ALG_WEP:
2411                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2412                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2413
2414                 if (keyinfo->keylen == 13)
2415                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2416
2417                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2418
2419                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2420                              "with key %d\n", ctl->key_idx);
2421                 break;
2422
2423         default:
2424                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2425                 break;
2426         }
2427 }
2428
2429 /*
2430  * handle build REPLY_TX command notification.
2431  */
2432 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2433                                   struct iwl3945_cmd *cmd,
2434                                   struct ieee80211_tx_control *ctrl,
2435                                   struct ieee80211_hdr *hdr,
2436                                   int is_unicast, u8 std_id)
2437 {
2438         __le16 *qc;
2439         u16 fc = le16_to_cpu(hdr->frame_control);
2440         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2441
2442         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2443         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2444                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2445                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2446                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2447                 if (ieee80211_is_probe_response(fc) &&
2448                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2449                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2450         } else {
2451                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2452                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2453         }
2454
2455         cmd->cmd.tx.sta_id = std_id;
2456         if (ieee80211_get_morefrag(hdr))
2457                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2458
2459         qc = ieee80211_get_qos_ctrl(hdr);
2460         if (qc) {
2461                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2462                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2463         } else
2464                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2465
2466         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2467                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2468                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2469         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2470                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2471                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2472         }
2473
2474         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2475                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2476
2477         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2478         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2479                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2480                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2481                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2482                 else
2483                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2484         } else
2485                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2486
2487         cmd->cmd.tx.driver_txop = 0;
2488         cmd->cmd.tx.tx_flags = tx_flags;
2489         cmd->cmd.tx.next_frame_len = 0;
2490 }
2491
2492 /**
2493  * iwl3945_get_sta_id - Find station's index within station table
2494  */
2495 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2496 {
2497         int sta_id;
2498         u16 fc = le16_to_cpu(hdr->frame_control);
2499
2500         /* If this frame is broadcast or management, use broadcast station id */
2501         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2502             is_multicast_ether_addr(hdr->addr1))
2503                 return priv->hw_setting.bcast_sta_id;
2504
2505         switch (priv->iw_mode) {
2506
2507         /* If we are a client station in a BSS network, use the special
2508          * AP station entry (that's the only station we communicate with) */
2509         case IEEE80211_IF_TYPE_STA:
2510                 return IWL_AP_ID;
2511
2512         /* If we are an AP, then find the station, or use BCAST */
2513         case IEEE80211_IF_TYPE_AP:
2514                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2515                 if (sta_id != IWL_INVALID_STATION)
2516                         return sta_id;
2517                 return priv->hw_setting.bcast_sta_id;
2518
2519         /* If this frame is going out to an IBSS network, find the station,
2520          * or create a new station table entry */
2521         case IEEE80211_IF_TYPE_IBSS: {
2522                 DECLARE_MAC_BUF(mac);
2523
2524                 /* Create new station table entry */
2525                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2526                 if (sta_id != IWL_INVALID_STATION)
2527                         return sta_id;
2528
2529                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2530
2531                 if (sta_id != IWL_INVALID_STATION)
2532                         return sta_id;
2533
2534                 IWL_DEBUG_DROP("Station %s not in station map. "
2535                                "Defaulting to broadcast...\n",
2536                                print_mac(mac, hdr->addr1));
2537                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2538                 return priv->hw_setting.bcast_sta_id;
2539         }
2540         default:
2541                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2542                 return priv->hw_setting.bcast_sta_id;
2543         }
2544 }
2545
2546 /*
2547  * start REPLY_TX command process
2548  */
2549 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2550                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2551 {
2552         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2553         struct iwl3945_tfd_frame *tfd;
2554         u32 *control_flags;
2555         int txq_id = ctl->queue;
2556         struct iwl3945_tx_queue *txq = NULL;
2557         struct iwl3945_queue *q = NULL;
2558         dma_addr_t phys_addr;
2559         dma_addr_t txcmd_phys;
2560         struct iwl3945_cmd *out_cmd = NULL;
2561         u16 len, idx, len_org;
2562         u8 id, hdr_len, unicast;
2563         u8 sta_id;
2564         u16 seq_number = 0;
2565         u16 fc;
2566         __le16 *qc;
2567         u8 wait_write_ptr = 0;
2568         unsigned long flags;
2569         int rc;
2570
2571         spin_lock_irqsave(&priv->lock, flags);
2572         if (iwl3945_is_rfkill(priv)) {
2573                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2574                 goto drop_unlock;
2575         }
2576
2577         if (!priv->vif) {
2578                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2579                 goto drop_unlock;
2580         }
2581
2582         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2583                 IWL_ERROR("ERROR: No TX rate available.\n");
2584                 goto drop_unlock;
2585         }
2586
2587         unicast = !is_multicast_ether_addr(hdr->addr1);
2588         id = 0;
2589
2590         fc = le16_to_cpu(hdr->frame_control);
2591
2592 #ifdef CONFIG_IWL3945_DEBUG
2593         if (ieee80211_is_auth(fc))
2594                 IWL_DEBUG_TX("Sending AUTH frame\n");
2595         else if (ieee80211_is_assoc_request(fc))
2596                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2597         else if (ieee80211_is_reassoc_request(fc))
2598                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2599 #endif
2600
2601         /* drop all data frame if we are not associated */
2602         if ((!iwl3945_is_associated(priv) ||
2603              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id)) &&
2604             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2605                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2606                 goto drop_unlock;
2607         }
2608
2609         spin_unlock_irqrestore(&priv->lock, flags);
2610
2611         hdr_len = ieee80211_get_hdrlen(fc);
2612
2613         /* Find (or create) index into station table for destination station */
2614         sta_id = iwl3945_get_sta_id(priv, hdr);
2615         if (sta_id == IWL_INVALID_STATION) {
2616                 DECLARE_MAC_BUF(mac);
2617
2618                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2619                                print_mac(mac, hdr->addr1));
2620                 goto drop;
2621         }
2622
2623         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2624
2625         qc = ieee80211_get_qos_ctrl(hdr);
2626         if (qc) {
2627                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2628                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2629                                 IEEE80211_SCTL_SEQ;
2630                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2631                         (hdr->seq_ctrl &
2632                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2633                 seq_number += 0x10;
2634         }
2635
2636         /* Descriptor for chosen Tx queue */
2637         txq = &priv->txq[txq_id];
2638         q = &txq->q;
2639
2640         spin_lock_irqsave(&priv->lock, flags);
2641
2642         /* Set up first empty TFD within this queue's circular TFD buffer */
2643         tfd = &txq->bd[q->write_ptr];
2644         memset(tfd, 0, sizeof(*tfd));
2645         control_flags = (u32 *) tfd;
2646         idx = get_cmd_index(q, q->write_ptr, 0);
2647
2648         /* Set up driver data for this TFD */
2649         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2650         txq->txb[q->write_ptr].skb[0] = skb;
2651         memcpy(&(txq->txb[q->write_ptr].status.control),
2652                ctl, sizeof(struct ieee80211_tx_control));
2653
2654         /* Init first empty entry in queue's array of Tx/cmd buffers */
2655         out_cmd = &txq->cmd[idx];
2656         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2657         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2658
2659         /*
2660          * Set up the Tx-command (not MAC!) header.
2661          * Store the chosen Tx queue and TFD index within the sequence field;
2662          * after Tx, uCode's Tx response will return this value so driver can
2663          * locate the frame within the tx queue and do post-tx processing.
2664          */
2665         out_cmd->hdr.cmd = REPLY_TX;
2666         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2667                                 INDEX_TO_SEQ(q->write_ptr)));
2668
2669         /* Copy MAC header from skb into command buffer */
2670         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2671
2672         /*
2673          * Use the first empty entry in this queue's command buffer array
2674          * to contain the Tx command and MAC header concatenated together
2675          * (payload data will be in another buffer).
2676          * Size of this varies, due to varying MAC header length.
2677          * If end is not dword aligned, we'll have 2 extra bytes at the end
2678          * of the MAC header (device reads on dword boundaries).
2679          * We'll tell device about this padding later.
2680          */
2681         len = priv->hw_setting.tx_cmd_len +
2682                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2683
2684         len_org = len;
2685         len = (len + 3) & ~3;
2686
2687         if (len_org != len)
2688                 len_org = 1;
2689         else
2690                 len_org = 0;
2691
2692         /* Physical address of this Tx command's header (not MAC header!),
2693          * within command buffer array. */
2694         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2695                      offsetof(struct iwl3945_cmd, hdr);
2696
2697         /* Add buffer containing Tx command and MAC(!) header to TFD's
2698          * first entry */
2699         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2700
2701         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2702                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2703
2704         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2705          * if any (802.11 null frames have no payload). */
2706         len = skb->len - hdr_len;
2707         if (len) {
2708                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2709                                            len, PCI_DMA_TODEVICE);
2710                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2711         }
2712
2713         if (!len)
2714                 /* If there is no payload, then we use only one Tx buffer */
2715                 *control_flags = TFD_CTL_COUNT_SET(1);
2716         else
2717                 /* Else use 2 buffers.
2718                  * Tell 3945 about any padding after MAC header */
2719                 *control_flags = TFD_CTL_COUNT_SET(2) |
2720                         TFD_CTL_PAD_SET(U32_PAD(len));
2721
2722         /* Total # bytes to be transmitted */
2723         len = (u16)skb->len;
2724         out_cmd->cmd.tx.len = cpu_to_le16(len);
2725
2726         /* TODO need this for burst mode later on */
2727         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2728
2729         /* set is_hcca to 0; it probably will never be implemented */
2730         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2731
2732         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2733         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2734
2735         if (!ieee80211_get_morefrag(hdr)) {
2736                 txq->need_update = 1;
2737                 if (qc) {
2738                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2739                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2740                 }
2741         } else {
2742                 wait_write_ptr = 1;
2743                 txq->need_update = 0;
2744         }
2745
2746         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2747                            sizeof(out_cmd->cmd.tx));
2748
2749         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2750                            ieee80211_get_hdrlen(fc));
2751
2752         /* Tell device the write index *just past* this latest filled TFD */
2753         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2754         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2755         spin_unlock_irqrestore(&priv->lock, flags);
2756
2757         if (rc)
2758                 return rc;
2759
2760         if ((iwl3945_queue_space(q) < q->high_mark)
2761             && priv->mac80211_registered) {
2762                 if (wait_write_ptr) {
2763                         spin_lock_irqsave(&priv->lock, flags);
2764                         txq->need_update = 1;
2765                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2766                         spin_unlock_irqrestore(&priv->lock, flags);
2767                 }
2768
2769                 ieee80211_stop_queue(priv->hw, ctl->queue);
2770         }
2771
2772         return 0;
2773
2774 drop_unlock:
2775         spin_unlock_irqrestore(&priv->lock, flags);
2776 drop:
2777         return -1;
2778 }
2779
2780 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2781 {
2782         const struct ieee80211_supported_band *sband = NULL;
2783         struct ieee80211_rate *rate;
2784         int i;
2785
2786         sband = iwl3945_get_band(priv, priv->band);
2787         if (!sband) {
2788                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2789                 return;
2790         }
2791
2792         priv->active_rate = 0;
2793         priv->active_rate_basic = 0;
2794
2795         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2796                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2797
2798         for (i = 0; i < sband->n_bitrates; i++) {
2799                 rate = &sband->bitrates[i];
2800                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2801                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2802                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2803                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2804                         priv->active_rate |= (1 << rate->hw_value);
2805                 }
2806         }
2807
2808         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2809                        priv->active_rate, priv->active_rate_basic);
2810
2811         /*
2812          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2813          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2814          * OFDM
2815          */
2816         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2817                 priv->staging_rxon.cck_basic_rates =
2818                     ((priv->active_rate_basic &
2819                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2820         else
2821                 priv->staging_rxon.cck_basic_rates =
2822                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2823
2824         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2825                 priv->staging_rxon.ofdm_basic_rates =
2826                     ((priv->active_rate_basic &
2827                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2828                       IWL_FIRST_OFDM_RATE) & 0xFF;
2829         else
2830                 priv->staging_rxon.ofdm_basic_rates =
2831                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2832 }
2833
2834 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2835 {
2836         unsigned long flags;
2837
2838         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2839                 return;
2840
2841         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2842                           disable_radio ? "OFF" : "ON");
2843
2844         if (disable_radio) {
2845                 iwl3945_scan_cancel(priv);
2846                 /* FIXME: This is a workaround for AP */
2847                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2848                         spin_lock_irqsave(&priv->lock, flags);
2849                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2850                                     CSR_UCODE_SW_BIT_RFKILL);
2851                         spin_unlock_irqrestore(&priv->lock, flags);
2852                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2853                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2854                 }
2855                 return;
2856         }
2857
2858         spin_lock_irqsave(&priv->lock, flags);
2859         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2860
2861         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2862         spin_unlock_irqrestore(&priv->lock, flags);
2863
2864         /* wake up ucode */
2865         msleep(10);
2866
2867         spin_lock_irqsave(&priv->lock, flags);
2868         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2869         if (!iwl3945_grab_nic_access(priv))
2870                 iwl3945_release_nic_access(priv);
2871         spin_unlock_irqrestore(&priv->lock, flags);
2872
2873         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2874                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2875                                   "disabled by HW switch\n");
2876                 return;
2877         }
2878
2879         queue_work(priv->workqueue, &priv->restart);
2880         return;
2881 }
2882
2883 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2884                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2885 {
2886         u16 fc =
2887             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2888
2889         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2890                 return;
2891
2892         if (!(fc & IEEE80211_FCTL_PROTECTED))
2893                 return;
2894
2895         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2896         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2897         case RX_RES_STATUS_SEC_TYPE_TKIP:
2898                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2899                     RX_RES_STATUS_BAD_ICV_MIC)
2900                         stats->flag |= RX_FLAG_MMIC_ERROR;
2901         case RX_RES_STATUS_SEC_TYPE_WEP:
2902         case RX_RES_STATUS_SEC_TYPE_CCMP:
2903                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2904                     RX_RES_STATUS_DECRYPT_OK) {
2905                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2906                         stats->flag |= RX_FLAG_DECRYPTED;
2907                 }
2908                 break;
2909
2910         default:
2911                 break;
2912         }
2913 }
2914
2915 #define IWL_PACKET_RETRY_TIME HZ
2916
2917 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2918 {
2919         u16 sc = le16_to_cpu(header->seq_ctrl);
2920         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2921         u16 frag = sc & IEEE80211_SCTL_FRAG;
2922         u16 *last_seq, *last_frag;
2923         unsigned long *last_time;
2924
2925         switch (priv->iw_mode) {
2926         case IEEE80211_IF_TYPE_IBSS:{
2927                 struct list_head *p;
2928                 struct iwl3945_ibss_seq *entry = NULL;
2929                 u8 *mac = header->addr2;
2930                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2931
2932                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2933                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
2934                         if (!compare_ether_addr(entry->mac, mac))
2935                                 break;
2936                 }
2937                 if (p == &priv->ibss_mac_hash[index]) {
2938                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2939                         if (!entry) {
2940                                 IWL_ERROR("Cannot malloc new mac entry\n");
2941                                 return 0;
2942                         }
2943                         memcpy(entry->mac, mac, ETH_ALEN);
2944                         entry->seq_num = seq;
2945                         entry->frag_num = frag;
2946                         entry->packet_time = jiffies;
2947                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2948                         return 0;
2949                 }
2950                 last_seq = &entry->seq_num;
2951                 last_frag = &entry->frag_num;
2952                 last_time = &entry->packet_time;
2953                 break;
2954         }
2955         case IEEE80211_IF_TYPE_STA:
2956                 last_seq = &priv->last_seq_num;
2957                 last_frag = &priv->last_frag_num;
2958                 last_time = &priv->last_packet_time;
2959                 break;
2960         default:
2961                 return 0;
2962         }
2963         if ((*last_seq == seq) &&
2964             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2965                 if (*last_frag == frag)
2966                         goto drop;
2967                 if (*last_frag + 1 != frag)
2968                         /* out-of-order fragment */
2969                         goto drop;
2970         } else
2971                 *last_seq = seq;
2972
2973         *last_frag = frag;
2974         *last_time = jiffies;
2975         return 0;
2976
2977  drop:
2978         return 1;
2979 }
2980
2981 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2982
2983 #include "iwl-spectrum.h"
2984
2985 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2986 #define BEACON_TIME_MASK_HIGH   0xFF000000
2987 #define TIME_UNIT               1024
2988
2989 /*
2990  * extended beacon time format
2991  * time in usec will be changed into a 32-bit value in 8:24 format
2992  * the high 1 byte is the beacon counts
2993  * the lower 3 bytes is the time in usec within one beacon interval
2994  */
2995
2996 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2997 {
2998         u32 quot;
2999         u32 rem;
3000         u32 interval = beacon_interval * 1024;
3001
3002         if (!interval || !usec)
3003                 return 0;
3004
3005         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3006         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3007
3008         return (quot << 24) + rem;
3009 }
3010
3011 /* base is usually what we get from ucode with each received frame,
3012  * the same as HW timer counter counting down
3013  */
3014
3015 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3016 {
3017         u32 base_low = base & BEACON_TIME_MASK_LOW;
3018         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3019         u32 interval = beacon_interval * TIME_UNIT;
3020         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3021             (addon & BEACON_TIME_MASK_HIGH);
3022
3023         if (base_low > addon_low)
3024                 res += base_low - addon_low;
3025         else if (base_low < addon_low) {
3026                 res += interval + base_low - addon_low;
3027                 res += (1 << 24);
3028         } else
3029                 res += (1 << 24);
3030
3031         return cpu_to_le32(res);
3032 }
3033
3034 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3035                                struct ieee80211_measurement_params *params,
3036                                u8 type)
3037 {
3038         struct iwl3945_spectrum_cmd spectrum;
3039         struct iwl3945_rx_packet *res;
3040         struct iwl3945_host_cmd cmd = {
3041                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3042                 .data = (void *)&spectrum,
3043                 .meta.flags = CMD_WANT_SKB,
3044         };
3045         u32 add_time = le64_to_cpu(params->start_time);
3046         int rc;
3047         int spectrum_resp_status;
3048         int duration = le16_to_cpu(params->duration);
3049
3050         if (iwl3945_is_associated(priv))
3051                 add_time =
3052                     iwl3945_usecs_to_beacons(
3053                         le64_to_cpu(params->start_time) - priv->last_tsf,
3054                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3055
3056         memset(&spectrum, 0, sizeof(spectrum));
3057
3058         spectrum.channel_count = cpu_to_le16(1);
3059         spectrum.flags =
3060             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3061         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3062         cmd.len = sizeof(spectrum);
3063         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3064
3065         if (iwl3945_is_associated(priv))
3066                 spectrum.start_time =
3067                     iwl3945_add_beacon_time(priv->last_beacon_time,
3068                                 add_time,
3069                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3070         else
3071                 spectrum.start_time = 0;
3072
3073         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3074         spectrum.channels[0].channel = params->channel;
3075         spectrum.channels[0].type = type;
3076         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3077                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3078                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3079
3080         rc = iwl3945_send_cmd_sync(priv, &cmd);
3081         if (rc)
3082                 return rc;
3083
3084         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3085         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3086                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3087                 rc = -EIO;
3088         }
3089
3090         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3091         switch (spectrum_resp_status) {
3092         case 0:         /* Command will be handled */
3093                 if (res->u.spectrum.id != 0xff) {
3094                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3095                                                 res->u.spectrum.id);
3096                         priv->measurement_status &= ~MEASUREMENT_READY;
3097                 }
3098                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3099                 rc = 0;
3100                 break;
3101
3102         case 1:         /* Command will not be handled */
3103                 rc = -EAGAIN;
3104                 break;
3105         }
3106
3107         dev_kfree_skb_any(cmd.meta.u.skb);
3108
3109         return rc;
3110 }
3111 #endif
3112
3113 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3114                                struct iwl3945_rx_mem_buffer *rxb)
3115 {
3116         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3117         struct iwl3945_alive_resp *palive;
3118         struct delayed_work *pwork;
3119
3120         palive = &pkt->u.alive_frame;
3121
3122         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3123                        "0x%01X 0x%01X\n",
3124                        palive->is_valid, palive->ver_type,
3125                        palive->ver_subtype);
3126
3127         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3128                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3129                 memcpy(&priv->card_alive_init,
3130                        &pkt->u.alive_frame,
3131                        sizeof(struct iwl3945_init_alive_resp));
3132                 pwork = &priv->init_alive_start;
3133         } else {
3134                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3135                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3136                        sizeof(struct iwl3945_alive_resp));
3137                 pwork = &priv->alive_start;
3138                 iwl3945_disable_events(priv);
3139         }
3140
3141         /* We delay the ALIVE response by 5ms to
3142          * give the HW RF Kill time to activate... */
3143         if (palive->is_valid == UCODE_VALID_OK)
3144                 queue_delayed_work(priv->workqueue, pwork,
3145                                    msecs_to_jiffies(5));
3146         else
3147                 IWL_WARNING("uCode did not respond OK.\n");
3148 }
3149
3150 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3151                                  struct iwl3945_rx_mem_buffer *rxb)
3152 {
3153         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3154
3155         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3156         return;
3157 }
3158
3159 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3160                                struct iwl3945_rx_mem_buffer *rxb)
3161 {
3162         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3163
3164         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3165                 "seq 0x%04X ser 0x%08X\n",
3166                 le32_to_cpu(pkt->u.err_resp.error_type),
3167                 get_cmd_string(pkt->u.err_resp.cmd_id),
3168                 pkt->u.err_resp.cmd_id,
3169                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3170                 le32_to_cpu(pkt->u.err_resp.error_info));
3171 }
3172
3173 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3174
3175 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3176 {
3177         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3178         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3179         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3180         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3181                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3182         rxon->channel = csa->channel;
3183         priv->staging_rxon.channel = csa->channel;
3184 }
3185
3186 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3187                                           struct iwl3945_rx_mem_buffer *rxb)
3188 {
3189 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3190         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3191         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3192
3193         if (!report->state) {
3194                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3195                           "Spectrum Measure Notification: Start\n");
3196                 return;
3197         }
3198
3199         memcpy(&priv->measure_report, report, sizeof(*report));
3200         priv->measurement_status |= MEASUREMENT_READY;
3201 #endif
3202 }
3203
3204 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3205                                   struct iwl3945_rx_mem_buffer *rxb)
3206 {
3207 #ifdef CONFIG_IWL3945_DEBUG
3208         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3209         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3210         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3211                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3212 #endif
3213 }
3214
3215 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3216                                              struct iwl3945_rx_mem_buffer *rxb)
3217 {
3218         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3219         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3220                         "notification for %s:\n",
3221                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3222         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3223 }
3224
3225 static void iwl3945_bg_beacon_update(struct work_struct *work)
3226 {
3227         struct iwl3945_priv *priv =
3228                 container_of(work, struct iwl3945_priv, beacon_update);
3229         struct sk_buff *beacon;
3230
3231         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3232         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3233
3234         if (!beacon) {
3235                 IWL_ERROR("update beacon failed\n");
3236                 return;
3237         }
3238
3239         mutex_lock(&priv->mutex);
3240         /* new beacon skb is allocated every time; dispose previous.*/
3241         if (priv->ibss_beacon)
3242                 dev_kfree_skb(priv->ibss_beacon);
3243
3244         priv->ibss_beacon = beacon;
3245         mutex_unlock(&priv->mutex);
3246
3247         iwl3945_send_beacon_cmd(priv);
3248 }
3249
3250 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3251                                 struct iwl3945_rx_mem_buffer *rxb)
3252 {
3253 #ifdef CONFIG_IWL3945_DEBUG
3254         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3255         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3256         u8 rate = beacon->beacon_notify_hdr.rate;
3257
3258         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3259                 "tsf %d %d rate %d\n",
3260                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3261                 beacon->beacon_notify_hdr.failure_frame,
3262                 le32_to_cpu(beacon->ibss_mgr_status),
3263                 le32_to_cpu(beacon->high_tsf),
3264                 le32_to_cpu(beacon->low_tsf), rate);
3265 #endif
3266
3267         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3268             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3269                 queue_work(priv->workqueue, &priv->beacon_update);
3270 }
3271
3272 /* Service response to REPLY_SCAN_CMD (0x80) */
3273 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3274                               struct iwl3945_rx_mem_buffer *rxb)
3275 {
3276 #ifdef CONFIG_IWL3945_DEBUG
3277         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3278         struct iwl3945_scanreq_notification *notif =
3279             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3280
3281         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3282 #endif
3283 }
3284
3285 /* Service SCAN_START_NOTIFICATION (0x82) */
3286 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3287                                     struct iwl3945_rx_mem_buffer *rxb)
3288 {
3289         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3290         struct iwl3945_scanstart_notification *notif =
3291             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3292         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3293         IWL_DEBUG_SCAN("Scan start: "
3294                        "%d [802.11%s] "
3295                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3296                        notif->channel,
3297                        notif->band ? "bg" : "a",
3298                        notif->tsf_high,
3299                        notif->tsf_low, notif->status, notif->beacon_timer);
3300 }
3301
3302 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3303 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3304                                       struct iwl3945_rx_mem_buffer *rxb)
3305 {
3306         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3307         struct iwl3945_scanresults_notification *notif =
3308             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3309
3310         IWL_DEBUG_SCAN("Scan ch.res: "
3311                        "%d [802.11%s] "
3312                        "(TSF: 0x%08X:%08X) - %d "
3313                        "elapsed=%lu usec (%dms since last)\n",
3314                        notif->channel,
3315                        notif->band ? "bg" : "a",
3316                        le32_to_cpu(notif->tsf_high),
3317                        le32_to_cpu(notif->tsf_low),
3318                        le32_to_cpu(notif->statistics[0]),
3319                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3320                        jiffies_to_msecs(elapsed_jiffies
3321                                         (priv->last_scan_jiffies, jiffies)));
3322
3323         priv->last_scan_jiffies = jiffies;
3324         priv->next_scan_jiffies = 0;
3325 }
3326
3327 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3328 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3329                                        struct iwl3945_rx_mem_buffer *rxb)
3330 {
3331         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3332         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3333
3334         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3335                        scan_notif->scanned_channels,
3336                        scan_notif->tsf_low,
3337                        scan_notif->tsf_high, scan_notif->status);
3338
3339         /* The HW is no longer scanning */
3340         clear_bit(STATUS_SCAN_HW, &priv->status);
3341
3342         /* The scan completion notification came in, so kill that timer... */
3343         cancel_delayed_work(&priv->scan_check);
3344
3345         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3346                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3347                        jiffies_to_msecs(elapsed_jiffies
3348                                         (priv->scan_pass_start, jiffies)));
3349
3350         /* Remove this scanned band from the list
3351          * of pending bands to scan */
3352         priv->scan_bands--;
3353
3354         /* If a request to abort was given, or the scan did not succeed
3355          * then we reset the scan state machine and terminate,
3356          * re-queuing another scan if one has been requested */
3357         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3358                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3359                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3360         } else {
3361                 /* If there are more bands on this scan pass reschedule */
3362                 if (priv->scan_bands > 0)
3363                         goto reschedule;
3364         }
3365
3366         priv->last_scan_jiffies = jiffies;
3367         priv->next_scan_jiffies = 0;
3368         IWL_DEBUG_INFO("Setting scan to off\n");
3369
3370         clear_bit(STATUS_SCANNING, &priv->status);
3371
3372         IWL_DEBUG_INFO("Scan took %dms\n",
3373                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3374
3375         queue_work(priv->workqueue, &priv->scan_completed);
3376
3377         return;
3378
3379 reschedule:
3380         priv->scan_pass_start = jiffies;
3381         queue_work(priv->workqueue, &priv->request_scan);
3382 }
3383
3384 /* Handle notification from uCode that card's power state is changing
3385  * due to software, hardware, or critical temperature RFKILL */
3386 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3387                                     struct iwl3945_rx_mem_buffer *rxb)
3388 {
3389         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3390         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3391         unsigned long status = priv->status;
3392
3393         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3394                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3395                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3396
3397         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3398                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3399
3400         if (flags & HW_CARD_DISABLED)
3401                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3402         else
3403                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3404
3405
3406         if (flags & SW_CARD_DISABLED)
3407                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3408         else
3409                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3410
3411         iwl3945_scan_cancel(priv);
3412
3413         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3414              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3415             (test_bit(STATUS_RF_KILL_SW, &status) !=
3416              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3417                 queue_work(priv->workqueue, &priv->rf_kill);
3418         else
3419                 wake_up_interruptible(&priv->wait_command_queue);
3420 }
3421
3422 /**
3423  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3424  *
3425  * Setup the RX handlers for each of the reply types sent from the uCode
3426  * to the host.
3427  *
3428  * This function chains into the hardware specific files for them to setup
3429  * any hardware specific handlers as well.
3430  */
3431 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3432 {
3433         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3434         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3435         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3436         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3437         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3438             iwl3945_rx_spectrum_measure_notif;
3439         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3440         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3441             iwl3945_rx_pm_debug_statistics_notif;
3442         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3443
3444         /*
3445          * The same handler is used for both the REPLY to a discrete
3446          * statistics request from the host as well as for the periodic
3447          * statistics notifications (after received beacons) from the uCode.
3448          */
3449         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3450         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3451
3452         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3453         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3454         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3455             iwl3945_rx_scan_results_notif;
3456         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3457             iwl3945_rx_scan_complete_notif;
3458         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3459
3460         /* Set up hardware specific Rx handlers */
3461         iwl3945_hw_rx_handler_setup(priv);
3462 }
3463
3464 /**
3465  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3466  * When FW advances 'R' index, all entries between old and new 'R' index
3467  * need to be reclaimed.
3468  */
3469 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3470                                       int txq_id, int index)
3471 {
3472         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3473         struct iwl3945_queue *q = &txq->q;
3474         int nfreed = 0;
3475
3476         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3477                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3478                           "is out of range [0-%d] %d %d.\n", txq_id,
3479                           index, q->n_bd, q->write_ptr, q->read_ptr);
3480                 return;
3481         }
3482
3483         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3484                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3485                 if (nfreed > 1) {
3486                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3487                                         q->write_ptr, q->read_ptr);
3488                         queue_work(priv->workqueue, &priv->restart);
3489                         break;
3490                 }
3491                 nfreed++;
3492         }
3493 }
3494
3495
3496 /**
3497  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3498  * @rxb: Rx buffer to reclaim
3499  *
3500  * If an Rx buffer has an async callback associated with it the callback
3501  * will be executed.  The attached skb (if present) will only be freed
3502  * if the callback returns 1
3503  */
3504 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3505                                 struct iwl3945_rx_mem_buffer *rxb)
3506 {
3507         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3508         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3509         int txq_id = SEQ_TO_QUEUE(sequence);
3510         int index = SEQ_TO_INDEX(sequence);
3511         int huge = sequence & SEQ_HUGE_FRAME;
3512         int cmd_index;
3513         struct iwl3945_cmd *cmd;
3514
3515         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3516
3517         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3518         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3519
3520         /* Input error checking is done when commands are added to queue. */
3521         if (cmd->meta.flags & CMD_WANT_SKB) {
3522                 cmd->meta.source->u.skb = rxb->skb;
3523                 rxb->skb = NULL;
3524         } else if (cmd->meta.u.callback &&
3525                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3526                 rxb->skb = NULL;
3527
3528         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3529
3530         if (!(cmd->meta.flags & CMD_ASYNC)) {
3531                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3532                 wake_up_interruptible(&priv->wait_command_queue);
3533         }
3534 }
3535
3536 /************************** RX-FUNCTIONS ****************************/
3537 /*
3538  * Rx theory of operation
3539  *
3540  * The host allocates 32 DMA target addresses and passes the host address
3541  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3542  * 0 to 31
3543  *
3544  * Rx Queue Indexes
3545  * The host/firmware share two index registers for managing the Rx buffers.
3546  *
3547  * The READ index maps to the first position that the firmware may be writing
3548  * to -- the driver can read up to (but not including) this position and get
3549  * good data.
3550  * The READ index is managed by the firmware once the card is enabled.
3551  *
3552  * The WRITE index maps to the last position the driver has read from -- the
3553  * position preceding WRITE is the last slot the firmware can place a packet.
3554  *
3555  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3556  * WRITE = READ.
3557  *
3558  * During initialization, the host sets up the READ queue position to the first
3559  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3560  *
3561  * When the firmware places a packet in a buffer, it will advance the READ index
3562  * and fire the RX interrupt.  The driver can then query the READ index and
3563  * process as many packets as possible, moving the WRITE index forward as it
3564  * resets the Rx queue buffers with new memory.
3565  *
3566  * The management in the driver is as follows:
3567  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3568  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3569  *   to replenish the iwl->rxq->rx_free.
3570  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3571  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3572  *   'processed' and 'read' driver indexes as well)
3573  * + A received packet is processed and handed to the kernel network stack,
3574  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3575  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3576  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3577  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3578  *   were enough free buffers and RX_STALLED is set it is cleared.
3579  *
3580  *
3581  * Driver sequence:
3582  *
3583  * iwl3945_rx_queue_alloc()   Allocates rx_free
3584  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3585  *                            iwl3945_rx_queue_restock
3586  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3587  *                            queue, updates firmware pointers, and updates
3588  *                            the WRITE index.  If insufficient rx_free buffers
3589  *                            are available, schedules iwl3945_rx_replenish
3590  *
3591  * -- enable interrupts --
3592  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3593  *                            READ INDEX, detaching the SKB from the pool.
3594  *                            Moves the packet buffer from queue to rx_used.
3595  *                            Calls iwl3945_rx_queue_restock to refill any empty
3596  *                            slots.
3597  * ...
3598  *
3599  */
3600
3601 /**
3602  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3603  */
3604 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3605 {
3606         int s = q->read - q->write;
3607         if (s <= 0)
3608                 s += RX_QUEUE_SIZE;
3609         /* keep some buffer to not confuse full and empty queue */
3610         s -= 2;
3611         if (s < 0)
3612                 s = 0;
3613         return s;
3614 }
3615
3616 /**
3617  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3618  */
3619 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3620 {
3621         u32 reg = 0;
3622         int rc = 0;
3623         unsigned long flags;
3624
3625         spin_lock_irqsave(&q->lock, flags);
3626
3627         if (q->need_update == 0)
3628                 goto exit_unlock;
3629
3630         /* If power-saving is in use, make sure device is awake */
3631         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3632                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3633
3634                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3635                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3636                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3637                         goto exit_unlock;
3638                 }
3639
3640                 rc = iwl3945_grab_nic_access(priv);
3641                 if (rc)
3642                         goto exit_unlock;
3643
3644                 /* Device expects a multiple of 8 */
3645                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3646                                      q->write & ~0x7);
3647                 iwl3945_release_nic_access(priv);
3648
3649         /* Else device is assumed to be awake */
3650         } else
3651                 /* Device expects a multiple of 8 */
3652                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3653
3654
3655         q->need_update = 0;
3656
3657  exit_unlock:
3658         spin_unlock_irqrestore(&q->lock, flags);
3659         return rc;
3660 }
3661
3662 /**
3663  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3664  */
3665 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3666                                           dma_addr_t dma_addr)
3667 {
3668         return cpu_to_le32((u32)dma_addr);
3669 }
3670
3671 /**
3672  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3673  *
3674  * If there are slots in the RX queue that need to be restocked,
3675  * and we have free pre-allocated buffers, fill the ranks as much
3676  * as we can, pulling from rx_free.
3677  *
3678  * This moves the 'write' index forward to catch up with 'processed', and
3679  * also updates the memory address in the firmware to reference the new
3680  * target buffer.
3681  */
3682 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3683 {
3684         struct iwl3945_rx_queue *rxq = &priv->rxq;
3685         struct list_head *element;
3686         struct iwl3945_rx_mem_buffer *rxb;
3687         unsigned long flags;
3688         int write, rc;
3689
3690         spin_lock_irqsave(&rxq->lock, flags);
3691         write = rxq->write & ~0x7;
3692         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3693                 /* Get next free Rx buffer, remove from free list */
3694                 element = rxq->rx_free.next;
3695                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3696                 list_del(element);
3697
3698                 /* Point to Rx buffer via next RBD in circular buffer */
3699                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3700                 rxq->queue[rxq->write] = rxb;
3701                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3702                 rxq->free_count--;
3703         }
3704         spin_unlock_irqrestore(&rxq->lock, flags);
3705         /* If the pre-allocated buffer pool is dropping low, schedule to
3706          * refill it */
3707         if (rxq->free_count <= RX_LOW_WATERMARK)
3708                 queue_work(priv->workqueue, &priv->rx_replenish);
3709
3710
3711         /* If we've added more space for the firmware to place data, tell it.
3712          * Increment device's write pointer in multiples of 8. */
3713         if ((write != (rxq->write & ~0x7))
3714             || (abs(rxq->write - rxq->read) > 7)) {
3715                 spin_lock_irqsave(&rxq->lock, flags);
3716                 rxq->need_update = 1;
3717                 spin_unlock_irqrestore(&rxq->lock, flags);
3718                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3719                 if (rc)
3720                         return rc;
3721         }
3722
3723         return 0;
3724 }
3725
3726 /**
3727  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3728  *
3729  * When moving to rx_free an SKB is allocated for the slot.
3730  *
3731  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3732  * This is called as a scheduled work item (except for during initialization)
3733  */
3734 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3735 {
3736         struct iwl3945_rx_queue *rxq = &priv->rxq;
3737         struct list_head *element;
3738         struct iwl3945_rx_mem_buffer *rxb;
3739         unsigned long flags;
3740         spin_lock_irqsave(&rxq->lock, flags);
3741         while (!list_empty(&rxq->rx_used)) {
3742                 element = rxq->rx_used.next;
3743                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3744
3745                 /* Alloc a new receive buffer */
3746                 rxb->skb =
3747                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3748                 if (!rxb->skb) {
3749                         if (net_ratelimit())
3750                                 printk(KERN_CRIT DRV_NAME
3751                                        ": Can not allocate SKB buffers\n");
3752                         /* We don't reschedule replenish work here -- we will
3753                          * call the restock method and if it still needs
3754                          * more buffers it will schedule replenish */
3755                         break;
3756                 }
3757
3758                 /* If radiotap head is required, reserve some headroom here.
3759                  * The physical head count is a variable rx_stats->phy_count.
3760                  * We reserve 4 bytes here. Plus these extra bytes, the
3761                  * headroom of the physical head should be enough for the
3762                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3763                  */
3764                 skb_reserve(rxb->skb, 4);
3765
3766                 priv->alloc_rxb_skb++;
3767                 list_del(element);
3768
3769                 /* Get physical address of RB/SKB */
3770                 rxb->dma_addr =
3771                     pci_map_single(priv->pci_dev, rxb->skb->data,
3772                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3773                 list_add_tail(&rxb->list, &rxq->rx_free);
3774                 rxq->free_count++;
3775         }
3776         spin_unlock_irqrestore(&rxq->lock, flags);
3777 }
3778
3779 /*
3780  * this should be called while priv->lock is locked
3781  */
3782 static void __iwl3945_rx_replenish(void *data)
3783 {
3784         struct iwl3945_priv *priv = data;
3785
3786         iwl3945_rx_allocate(priv);
3787         iwl3945_rx_queue_restock(priv);
3788 }
3789
3790
3791 void iwl3945_rx_replenish(void *data)
3792 {
3793         struct iwl3945_priv *priv = data;
3794         unsigned long flags;
3795
3796         iwl3945_rx_allocate(priv);
3797
3798         spin_lock_irqsave(&priv->lock, flags);
3799         iwl3945_rx_queue_restock(priv);
3800         spin_unlock_irqrestore(&priv->lock, flags);
3801 }
3802
3803 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3804  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3805  * This free routine walks the list of POOL entries and if SKB is set to
3806  * non NULL it is unmapped and freed
3807  */
3808 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3809 {
3810         int i;
3811         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3812                 if (rxq->pool[i].skb != NULL) {
3813                         pci_unmap_single(priv->pci_dev,
3814                                          rxq->pool[i].dma_addr,
3815                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3816                         dev_kfree_skb(rxq->pool[i].skb);
3817                 }
3818         }
3819
3820         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3821                             rxq->dma_addr);
3822         rxq->bd = NULL;
3823 }
3824
3825 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3826 {
3827         struct iwl3945_rx_queue *rxq = &priv->rxq;
3828         struct pci_dev *dev = priv->pci_dev;
3829         int i;
3830
3831         spin_lock_init(&rxq->lock);
3832         INIT_LIST_HEAD(&rxq->rx_free);
3833         INIT_LIST_HEAD(&rxq->rx_used);
3834
3835         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3836         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3837         if (!rxq->bd)
3838                 return -ENOMEM;
3839
3840         /* Fill the rx_used queue with _all_ of the Rx buffers */
3841         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3842                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3843
3844         /* Set us so that we have processed and used all buffers, but have
3845          * not restocked the Rx queue with fresh buffers */
3846         rxq->read = rxq->write = 0;
3847         rxq->free_count = 0;
3848         rxq->need_update = 0;
3849         return 0;
3850 }
3851
3852 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3853 {
3854         unsigned long flags;
3855         int i;
3856         spin_lock_irqsave(&rxq->lock, flags);
3857         INIT_LIST_HEAD(&rxq->rx_free);
3858         INIT_LIST_HEAD(&rxq->rx_used);
3859         /* Fill the rx_used queue with _all_ of the Rx buffers */
3860         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3861                 /* In the reset function, these buffers may have been allocated
3862                  * to an SKB, so we need to unmap and free potential storage */
3863                 if (rxq->pool[i].skb != NULL) {
3864                         pci_unmap_single(priv->pci_dev,
3865                                          rxq->pool[i].dma_addr,
3866                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3867                         priv->alloc_rxb_skb--;
3868                         dev_kfree_skb(rxq->pool[i].skb);
3869                         rxq->pool[i].skb = NULL;
3870                 }
3871                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3872         }
3873
3874         /* Set us so that we have processed and used all buffers, but have
3875          * not restocked the Rx queue with fresh buffers */
3876         rxq->read = rxq->write = 0;
3877         rxq->free_count = 0;
3878         spin_unlock_irqrestore(&rxq->lock, flags);
3879 }
3880
3881 /* Convert linear signal-to-noise ratio into dB */
3882 static u8 ratio2dB[100] = {
3883 /*       0   1   2   3   4   5   6   7   8   9 */
3884          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3885         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3886         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3887         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3888         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3889         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3890         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3891         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3892         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3893         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3894 };
3895
3896 /* Calculates a relative dB value from a ratio of linear
3897  *   (i.e. not dB) signal levels.
3898  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3899 int iwl3945_calc_db_from_ratio(int sig_ratio)
3900 {
3901         /* 1000:1 or higher just report as 60 dB */
3902         if (sig_ratio >= 1000)
3903                 return 60;
3904
3905         /* 100:1 or higher, divide by 10 and use table,
3906          *   add 20 dB to make up for divide by 10 */
3907         if (sig_ratio >= 100)
3908                 return (20 + (int)ratio2dB[sig_ratio/10]);
3909
3910         /* We shouldn't see this */
3911         if (sig_ratio < 1)
3912                 return 0;
3913
3914         /* Use table for ratios 1:1 - 99:1 */
3915         return (int)ratio2dB[sig_ratio];
3916 }
3917
3918 #define PERFECT_RSSI (-20) /* dBm */
3919 #define WORST_RSSI (-95)   /* dBm */
3920 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3921
3922 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3923  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3924  *   about formulas used below. */
3925 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3926 {
3927         int sig_qual;
3928         int degradation = PERFECT_RSSI - rssi_dbm;
3929
3930         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3931          * as indicator; formula is (signal dbm - noise dbm).
3932          * SNR at or above 40 is a great signal (100%).
3933          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3934          * Weakest usable signal is usually 10 - 15 dB SNR. */
3935         if (noise_dbm) {
3936                 if (rssi_dbm - noise_dbm >= 40)
3937                         return 100;
3938                 else if (rssi_dbm < noise_dbm)
3939                         return 0;
3940                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3941
3942         /* Else use just the signal level.
3943          * This formula is a least squares fit of data points collected and
3944          *   compared with a reference system that had a percentage (%) display
3945          *   for signal quality. */
3946         } else
3947                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3948                             (15 * RSSI_RANGE + 62 * degradation)) /
3949                            (RSSI_RANGE * RSSI_RANGE);
3950
3951         if (sig_qual > 100)
3952                 sig_qual = 100;
3953         else if (sig_qual < 1)
3954                 sig_qual = 0;
3955
3956         return sig_qual;
3957 }
3958
3959 /**
3960  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3961  *
3962  * Uses the priv->rx_handlers callback function array to invoke
3963  * the appropriate handlers, including command responses,
3964  * frame-received notifications, and other notifications.
3965  */
3966 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3967 {
3968         struct iwl3945_rx_mem_buffer *rxb;
3969         struct iwl3945_rx_packet *pkt;
3970         struct iwl3945_rx_queue *rxq = &priv->rxq;
3971         u32 r, i;
3972         int reclaim;
3973         unsigned long flags;
3974         u8 fill_rx = 0;
3975         u32 count = 8;
3976
3977         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3978          * buffer that the driver may process (last buffer filled by ucode). */
3979         r = iwl3945_hw_get_rx_read(priv);
3980         i = rxq->read;
3981
3982         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3983                 fill_rx = 1;
3984         /* Rx interrupt, but nothing sent from uCode */
3985         if (i == r)
3986                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3987
3988         while (i != r) {
3989                 rxb = rxq->queue[i];
3990
3991                 /* If an RXB doesn't have a Rx queue slot associated with it,
3992                  * then a bug has been introduced in the queue refilling
3993                  * routines -- catch it here */
3994                 BUG_ON(rxb == NULL);
3995
3996                 rxq->queue[i] = NULL;
3997
3998                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3999                                             IWL_RX_BUF_SIZE,
4000                                             PCI_DMA_FROMDEVICE);
4001                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4002
4003                 /* Reclaim a command buffer only if this packet is a response
4004                  *   to a (driver-originated) command.
4005                  * If the packet (e.g. Rx frame) originated from uCode,
4006                  *   there is no command buffer to reclaim.
4007                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4008                  *   but apparently a few don't get set; catch them here. */
4009                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4010                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4011                         (pkt->hdr.cmd != REPLY_TX);
4012
4013                 /* Based on type of command response or notification,
4014                  *   handle those that need handling via function in
4015                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4016                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4017                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4018                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4019                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4020                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4021                 } else {
4022                         /* No handling needed */
4023                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4024                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4025                                 r, i, get_cmd_string(pkt->hdr.cmd),
4026                                 pkt->hdr.cmd);
4027                 }
4028
4029                 if (reclaim) {
4030                         /* Invoke any callbacks, transfer the skb to caller, and
4031                          * fire off the (possibly) blocking iwl3945_send_cmd()
4032                          * as we reclaim the driver command queue */
4033                         if (rxb && rxb->skb)
4034                                 iwl3945_tx_cmd_complete(priv, rxb);
4035                         else
4036                                 IWL_WARNING("Claim null rxb?\n");
4037                 }
4038
4039                 /* For now we just don't re-use anything.  We can tweak this
4040                  * later to try and re-use notification packets and SKBs that
4041                  * fail to Rx correctly */
4042                 if (rxb->skb != NULL) {
4043                         priv->alloc_rxb_skb--;
4044                         dev_kfree_skb_any(rxb->skb);
4045                         rxb->skb = NULL;
4046                 }
4047
4048                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4049                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4050                 spin_lock_irqsave(&rxq->lock, flags);
4051                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4052                 spin_unlock_irqrestore(&rxq->lock, flags);
4053                 i = (i + 1) & RX_QUEUE_MASK;
4054                 /* If there are a lot of unused frames,
4055                  * restock the Rx queue so ucode won't assert. */
4056                 if (fill_rx) {
4057                         count++;
4058                         if (count >= 8) {
4059                                 priv->rxq.read = i;
4060                                 __iwl3945_rx_replenish(priv);
4061                                 count = 0;
4062                         }
4063                 }
4064         }
4065
4066         /* Backtrack one entry */
4067         priv->rxq.read = i;
4068         iwl3945_rx_queue_restock(priv);
4069 }
4070
4071 /**
4072  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4073  */
4074 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4075                                   struct iwl3945_tx_queue *txq)
4076 {
4077         u32 reg = 0;
4078         int rc = 0;
4079         int txq_id = txq->q.id;
4080
4081         if (txq->need_update == 0)
4082                 return rc;
4083
4084         /* if we're trying to save power */
4085         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4086                 /* wake up nic if it's powered down ...
4087                  * uCode will wake up, and interrupt us again, so next
4088                  * time we'll skip this part. */
4089                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4090
4091                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4092                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4093                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4094                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4095                         return rc;
4096                 }
4097
4098                 /* restore this queue's parameters in nic hardware. */
4099                 rc = iwl3945_grab_nic_access(priv);
4100                 if (rc)
4101                         return rc;
4102                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4103                                      txq->q.write_ptr | (txq_id << 8));
4104                 iwl3945_release_nic_access(priv);
4105
4106         /* else not in power-save mode, uCode will never sleep when we're
4107          * trying to tx (during RFKILL, we're not trying to tx). */
4108         } else
4109                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4110                             txq->q.write_ptr | (txq_id << 8));
4111
4112         txq->need_update = 0;
4113
4114         return rc;
4115 }
4116
4117 #ifdef CONFIG_IWL3945_DEBUG
4118 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4119 {
4120         DECLARE_MAC_BUF(mac);
4121
4122         IWL_DEBUG_RADIO("RX CONFIG:\n");
4123         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4124         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4125         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4126         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4127                         le32_to_cpu(rxon->filter_flags));
4128         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4129         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4130                         rxon->ofdm_basic_rates);
4131         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4132         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4133                         print_mac(mac, rxon->node_addr));
4134         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4135                         print_mac(mac, rxon->bssid_addr));
4136         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4137 }
4138 #endif
4139
4140 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4141 {
4142         IWL_DEBUG_ISR("Enabling interrupts\n");
4143         set_bit(STATUS_INT_ENABLED, &priv->status);
4144         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4145 }
4146
4147 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4148 {
4149         clear_bit(STATUS_INT_ENABLED, &priv->status);
4150
4151         /* disable interrupts from uCode/NIC to host */
4152         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4153
4154         /* acknowledge/clear/reset any interrupts still pending
4155          * from uCode or flow handler (Rx/Tx DMA) */
4156         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4157         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4158         IWL_DEBUG_ISR("Disabled interrupts\n");
4159 }
4160
4161 static const char *desc_lookup(int i)
4162 {
4163         switch (i) {
4164         case 1:
4165                 return "FAIL";
4166         case 2:
4167                 return "BAD_PARAM";
4168         case 3:
4169                 return "BAD_CHECKSUM";
4170         case 4:
4171                 return "NMI_INTERRUPT";
4172         case 5:
4173                 return "SYSASSERT";
4174         case 6:
4175                 return "FATAL_ERROR";
4176         }
4177
4178         return "UNKNOWN";
4179 }
4180
4181 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4182 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4183
4184 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4185 {
4186         u32 i;
4187         u32 desc, time, count, base, data1;
4188         u32 blink1, blink2, ilink1, ilink2;
4189         int rc;
4190
4191         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4192
4193         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4194                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4195                 return;
4196         }
4197
4198         rc = iwl3945_grab_nic_access(priv);
4199         if (rc) {
4200                 IWL_WARNING("Can not read from adapter at this time.\n");
4201                 return;
4202         }
4203
4204         count = iwl3945_read_targ_mem(priv, base);
4205
4206         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4207                 IWL_ERROR("Start IWL Error Log Dump:\n");
4208                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4209         }
4210
4211         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4212                   "ilink1  nmiPC   Line\n");
4213         for (i = ERROR_START_OFFSET;
4214              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4215              i += ERROR_ELEM_SIZE) {
4216                 desc = iwl3945_read_targ_mem(priv, base + i);
4217                 time =
4218                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4219                 blink1 =
4220                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4221                 blink2 =
4222                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4223                 ilink1 =
4224                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4225                 ilink2 =
4226                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4227                 data1 =
4228                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4229
4230                 IWL_ERROR
4231                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4232                      desc_lookup(desc), desc, time, blink1, blink2,
4233                      ilink1, ilink2, data1);
4234         }
4235
4236         iwl3945_release_nic_access(priv);
4237
4238 }
4239
4240 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4241
4242 /**
4243  * iwl3945_print_event_log - Dump error event log to syslog
4244  *
4245  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4246  */
4247 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4248                                 u32 num_events, u32 mode)
4249 {
4250         u32 i;
4251         u32 base;       /* SRAM byte address of event log header */
4252         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4253         u32 ptr;        /* SRAM byte address of log data */
4254         u32 ev, time, data; /* event log data */
4255
4256         if (num_events == 0)
4257                 return;
4258
4259         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4260
4261         if (mode == 0)
4262                 event_size = 2 * sizeof(u32);
4263         else
4264                 event_size = 3 * sizeof(u32);
4265
4266         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4267
4268         /* "time" is actually "data" for mode 0 (no timestamp).
4269          * place event id # at far right for easier visual parsing. */
4270         for (i = 0; i < num_events; i++) {
4271                 ev = iwl3945_read_targ_mem(priv, ptr);
4272                 ptr += sizeof(u32);
4273                 time = iwl3945_read_targ_mem(priv, ptr);
4274                 ptr += sizeof(u32);
4275                 if (mode == 0)
4276                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4277                 else {
4278                         data = iwl3945_read_targ_mem(priv, ptr);
4279                         ptr += sizeof(u32);
4280                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4281                 }
4282         }
4283 }
4284
4285 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4286 {
4287         int rc;
4288         u32 base;       /* SRAM byte address of event log header */
4289         u32 capacity;   /* event log capacity in # entries */
4290         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4291         u32 num_wraps;  /* # times uCode wrapped to top of log */
4292         u32 next_entry; /* index of next entry to be written by uCode */
4293         u32 size;       /* # entries that we'll print */
4294
4295         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4296         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4297                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4298                 return;
4299         }
4300
4301         rc = iwl3945_grab_nic_access(priv);
4302         if (rc) {
4303                 IWL_WARNING("Can not read from adapter at this time.\n");
4304                 return;
4305         }
4306
4307         /* event log header */
4308         capacity = iwl3945_read_targ_mem(priv, base);
4309         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4310         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4311         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4312
4313         size = num_wraps ? capacity : next_entry;
4314
4315         /* bail out if nothing in log */
4316         if (size == 0) {
4317                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4318                 iwl3945_release_nic_access(priv);
4319                 return;
4320         }
4321
4322         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4323                   size, num_wraps);
4324
4325         /* if uCode has wrapped back to top of log, start at the oldest entry,
4326          * i.e the next one that uCode would fill. */
4327         if (num_wraps)
4328                 iwl3945_print_event_log(priv, next_entry,
4329                                     capacity - next_entry, mode);
4330
4331         /* (then/else) start at top of log */
4332         iwl3945_print_event_log(priv, 0, next_entry, mode);
4333
4334         iwl3945_release_nic_access(priv);
4335 }
4336
4337 /**
4338  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4339  */
4340 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4341 {
4342         /* Set the FW error flag -- cleared on iwl3945_down */
4343         set_bit(STATUS_FW_ERROR, &priv->status);
4344
4345         /* Cancel currently queued command. */
4346         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4347
4348 #ifdef CONFIG_IWL3945_DEBUG
4349         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4350                 iwl3945_dump_nic_error_log(priv);
4351                 iwl3945_dump_nic_event_log(priv);
4352                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4353         }
4354 #endif
4355
4356         wake_up_interruptible(&priv->wait_command_queue);
4357
4358         /* Keep the restart process from trying to send host
4359          * commands by clearing the INIT status bit */
4360         clear_bit(STATUS_READY, &priv->status);
4361
4362         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4363                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4364                           "Restarting adapter due to uCode error.\n");
4365
4366                 if (iwl3945_is_associated(priv)) {
4367                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4368                                sizeof(priv->recovery_rxon));
4369                         priv->error_recovering = 1;
4370                 }
4371                 queue_work(priv->workqueue, &priv->restart);
4372         }
4373 }
4374
4375 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4376 {
4377         unsigned long flags;
4378
4379         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4380                sizeof(priv->staging_rxon));
4381         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4382         iwl3945_commit_rxon(priv);
4383
4384         iwl3945_add_station(priv, priv->bssid, 1, 0);
4385
4386         spin_lock_irqsave(&priv->lock, flags);
4387         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4388         priv->error_recovering = 0;
4389         spin_unlock_irqrestore(&priv->lock, flags);
4390 }
4391
4392 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4393 {
4394         u32 inta, handled = 0;
4395         u32 inta_fh;
4396         unsigned long flags;
4397 #ifdef CONFIG_IWL3945_DEBUG
4398         u32 inta_mask;
4399 #endif
4400
4401         spin_lock_irqsave(&priv->lock, flags);
4402
4403         /* Ack/clear/reset pending uCode interrupts.
4404          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4405          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4406         inta = iwl3945_read32(priv, CSR_INT);
4407         iwl3945_write32(priv, CSR_INT, inta);
4408
4409         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4410          * Any new interrupts that happen after this, either while we're
4411          * in this tasklet, or later, will show up in next ISR/tasklet. */
4412         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4413         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4414
4415 #ifdef CONFIG_IWL3945_DEBUG
4416         if (iwl3945_debug_level & IWL_DL_ISR) {
4417                 /* just for debug */
4418                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4419                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4420                               inta, inta_mask, inta_fh);
4421         }
4422 #endif
4423
4424         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4425          * atomic, make sure that inta covers all the interrupts that
4426          * we've discovered, even if FH interrupt came in just after
4427          * reading CSR_INT. */
4428         if (inta_fh & CSR39_FH_INT_RX_MASK)
4429                 inta |= CSR_INT_BIT_FH_RX;
4430         if (inta_fh & CSR39_FH_INT_TX_MASK)
4431                 inta |= CSR_INT_BIT_FH_TX;
4432
4433         /* Now service all interrupt bits discovered above. */
4434         if (inta & CSR_INT_BIT_HW_ERR) {
4435                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4436
4437                 /* Tell the device to stop sending interrupts */
4438                 iwl3945_disable_interrupts(priv);
4439
4440                 iwl3945_irq_handle_error(priv);
4441
4442                 handled |= CSR_INT_BIT_HW_ERR;
4443
4444                 spin_unlock_irqrestore(&priv->lock, flags);
4445
4446                 return;
4447         }
4448
4449 #ifdef CONFIG_IWL3945_DEBUG
4450         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4451                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4452                 if (inta & CSR_INT_BIT_SCD)
4453                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4454                                       "the frame/frames.\n");
4455
4456                 /* Alive notification via Rx interrupt will do the real work */
4457                 if (inta & CSR_INT_BIT_ALIVE)
4458                         IWL_DEBUG_ISR("Alive interrupt\n");
4459         }
4460 #endif
4461         /* Safely ignore these bits for debug checks below */
4462         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4463
4464         /* HW RF KILL switch toggled (4965 only) */
4465         if (inta & CSR_INT_BIT_RF_KILL) {
4466                 int hw_rf_kill = 0;
4467                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4468                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4469                         hw_rf_kill = 1;
4470
4471                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4472                                 "RF_KILL bit toggled to %s.\n",
4473                                 hw_rf_kill ? "disable radio":"enable radio");
4474
4475                 /* Queue restart only if RF_KILL switch was set to "kill"
4476                  *   when we loaded driver, and is now set to "enable".
4477                  * After we're Alive, RF_KILL gets handled by
4478                  *   iwl3945_rx_card_state_notif() */
4479                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4480                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4481                         queue_work(priv->workqueue, &priv->restart);
4482                 }
4483
4484                 handled |= CSR_INT_BIT_RF_KILL;
4485         }
4486
4487         /* Chip got too hot and stopped itself (4965 only) */
4488         if (inta & CSR_INT_BIT_CT_KILL) {
4489                 IWL_ERROR("Microcode CT kill error detected.\n");
4490                 handled |= CSR_INT_BIT_CT_KILL;
4491         }
4492
4493         /* Error detected by uCode */
4494         if (inta & CSR_INT_BIT_SW_ERR) {
4495                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4496                           inta);
4497                 iwl3945_irq_handle_error(priv);
4498                 handled |= CSR_INT_BIT_SW_ERR;
4499         }
4500
4501         /* uCode wakes up after power-down sleep */
4502         if (inta & CSR_INT_BIT_WAKEUP) {
4503                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4504                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4505                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4506                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4507                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4508                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4509                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4510                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4511
4512                 handled |= CSR_INT_BIT_WAKEUP;
4513         }
4514
4515         /* All uCode command responses, including Tx command responses,
4516          * Rx "responses" (frame-received notification), and other
4517          * notifications from uCode come through here*/
4518         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4519                 iwl3945_rx_handle(priv);
4520                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4521         }
4522
4523         if (inta & CSR_INT_BIT_FH_TX) {
4524                 IWL_DEBUG_ISR("Tx interrupt\n");
4525
4526                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4527                 if (!iwl3945_grab_nic_access(priv)) {
4528                         iwl3945_write_direct32(priv,
4529                                              FH_TCSR_CREDIT
4530                                              (ALM_FH_SRVC_CHNL), 0x0);
4531                         iwl3945_release_nic_access(priv);
4532                 }
4533                 handled |= CSR_INT_BIT_FH_TX;
4534         }
4535
4536         if (inta & ~handled)
4537                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4538
4539         if (inta & ~CSR_INI_SET_MASK) {
4540                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4541                          inta & ~CSR_INI_SET_MASK);
4542                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4543         }
4544
4545         /* Re-enable all interrupts */
4546         iwl3945_enable_interrupts(priv);
4547
4548 #ifdef CONFIG_IWL3945_DEBUG
4549         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4550                 inta = iwl3945_read32(priv, CSR_INT);
4551                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4552                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4553                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4554                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4555         }
4556 #endif
4557         spin_unlock_irqrestore(&priv->lock, flags);
4558 }
4559
4560 static irqreturn_t iwl3945_isr(int irq, void *data)
4561 {
4562         struct iwl3945_priv *priv = data;
4563         u32 inta, inta_mask;
4564         u32 inta_fh;
4565         if (!priv)
4566                 return IRQ_NONE;
4567
4568         spin_lock(&priv->lock);
4569
4570         /* Disable (but don't clear!) interrupts here to avoid
4571          *    back-to-back ISRs and sporadic interrupts from our NIC.
4572          * If we have something to service, the tasklet will re-enable ints.
4573          * If we *don't* have something, we'll re-enable before leaving here. */
4574         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4575         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4576
4577         /* Discover which interrupts are active/pending */
4578         inta = iwl3945_read32(priv, CSR_INT);
4579         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4580
4581         /* Ignore interrupt if there's nothing in NIC to service.
4582          * This may be due to IRQ shared with another device,
4583          * or due to sporadic interrupts thrown from our NIC. */
4584         if (!inta && !inta_fh) {
4585                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4586                 goto none;
4587         }
4588
4589         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4590                 /* Hardware disappeared */
4591                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4592                 goto unplugged;
4593         }
4594
4595         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4596                       inta, inta_mask, inta_fh);
4597
4598         inta &= ~CSR_INT_BIT_SCD;
4599
4600         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4601         if (likely(inta || inta_fh))
4602                 tasklet_schedule(&priv->irq_tasklet);
4603 unplugged:
4604         spin_unlock(&priv->lock);
4605
4606         return IRQ_HANDLED;
4607
4608  none:
4609         /* re-enable interrupts here since we don't have anything to service. */
4610         iwl3945_enable_interrupts(priv);
4611         spin_unlock(&priv->lock);
4612         return IRQ_NONE;
4613 }
4614
4615 /************************** EEPROM BANDS ****************************
4616  *
4617  * The iwl3945_eeprom_band definitions below provide the mapping from the
4618  * EEPROM contents to the specific channel number supported for each
4619  * band.
4620  *
4621  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4622  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4623  * The specific geography and calibration information for that channel
4624  * is contained in the eeprom map itself.
4625  *
4626  * During init, we copy the eeprom information and channel map
4627  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4628  *
4629  * channel_map_24/52 provides the index in the channel_info array for a
4630  * given channel.  We have to have two separate maps as there is channel
4631  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4632  * band_2
4633  *
4634  * A value of 0xff stored in the channel_map indicates that the channel
4635  * is not supported by the hardware at all.
4636  *
4637  * A value of 0xfe in the channel_map indicates that the channel is not
4638  * valid for Tx with the current hardware.  This means that
4639  * while the system can tune and receive on a given channel, it may not
4640  * be able to associate or transmit any frames on that
4641  * channel.  There is no corresponding channel information for that
4642  * entry.
4643  *
4644  *********************************************************************/
4645
4646 /* 2.4 GHz */
4647 static const u8 iwl3945_eeprom_band_1[14] = {
4648         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4649 };
4650
4651 /* 5.2 GHz bands */
4652 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4653         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4654 };
4655
4656 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4657         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4658 };
4659
4660 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4661         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4662 };
4663
4664 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4665         145, 149, 153, 157, 161, 165
4666 };
4667
4668 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4669                                     int *eeprom_ch_count,
4670                                     const struct iwl3945_eeprom_channel
4671                                     **eeprom_ch_info,
4672                                     const u8 **eeprom_ch_index)
4673 {
4674         switch (band) {
4675         case 1:         /* 2.4GHz band */
4676                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4677                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4678                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4679                 break;
4680         case 2:         /* 4.9GHz band */
4681                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4682                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4683                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4684                 break;
4685         case 3:         /* 5.2GHz band */
4686                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4687                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4688                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4689                 break;
4690         case 4:         /* 5.5GHz band */
4691                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4692                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4693                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4694                 break;
4695         case 5:         /* 5.7GHz band */
4696                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4697                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4698                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4699                 break;
4700         default:
4701                 BUG();
4702                 return;
4703         }
4704 }
4705
4706 /**
4707  * iwl3945_get_channel_info - Find driver's private channel info
4708  *
4709  * Based on band and channel number.
4710  */
4711 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4712                                                     enum ieee80211_band band, u16 channel)
4713 {
4714         int i;
4715
4716         switch (band) {
4717         case IEEE80211_BAND_5GHZ:
4718                 for (i = 14; i < priv->channel_count; i++) {
4719                         if (priv->channel_info[i].channel == channel)
4720                                 return &priv->channel_info[i];
4721                 }
4722                 break;
4723
4724         case IEEE80211_BAND_2GHZ:
4725                 if (channel >= 1 && channel <= 14)
4726                         return &priv->channel_info[channel - 1];
4727                 break;
4728         case IEEE80211_NUM_BANDS:
4729                 WARN_ON(1);
4730         }
4731
4732         return NULL;
4733 }
4734
4735 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4736                             ? # x " " : "")
4737
4738 /**
4739  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4740  */
4741 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4742 {
4743         int eeprom_ch_count = 0;
4744         const u8 *eeprom_ch_index = NULL;
4745         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4746         int band, ch;
4747         struct iwl3945_channel_info *ch_info;
4748
4749         if (priv->channel_count) {
4750                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4751                 return 0;
4752         }
4753
4754         if (priv->eeprom.version < 0x2f) {
4755                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4756                             priv->eeprom.version);
4757                 return -EINVAL;
4758         }
4759
4760         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4761
4762         priv->channel_count =
4763             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4764             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4765             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4766             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4767             ARRAY_SIZE(iwl3945_eeprom_band_5);
4768
4769         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4770
4771         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4772                                      priv->channel_count, GFP_KERNEL);
4773         if (!priv->channel_info) {
4774                 IWL_ERROR("Could not allocate channel_info\n");
4775                 priv->channel_count = 0;
4776                 return -ENOMEM;
4777         }
4778
4779         ch_info = priv->channel_info;
4780
4781         /* Loop through the 5 EEPROM bands adding them in order to the
4782          * channel map we maintain (that contains additional information than
4783          * what just in the EEPROM) */
4784         for (band = 1; band <= 5; band++) {
4785
4786                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4787                                         &eeprom_ch_info, &eeprom_ch_index);
4788
4789                 /* Loop through each band adding each of the channels */
4790                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4791                         ch_info->channel = eeprom_ch_index[ch];
4792                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4793                             IEEE80211_BAND_5GHZ;
4794
4795                         /* permanently store EEPROM's channel regulatory flags
4796                          *   and max power in channel info database. */
4797                         ch_info->eeprom = eeprom_ch_info[ch];
4798
4799                         /* Copy the run-time flags so they are there even on
4800                          * invalid channels */
4801                         ch_info->flags = eeprom_ch_info[ch].flags;
4802
4803                         if (!(is_channel_valid(ch_info))) {
4804                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4805                                                "No traffic\n",
4806                                                ch_info->channel,
4807                                                ch_info->flags,
4808                                                is_channel_a_band(ch_info) ?
4809                                                "5.2" : "2.4");
4810                                 ch_info++;
4811                                 continue;
4812                         }
4813
4814                         /* Initialize regulatory-based run-time data */
4815                         ch_info->max_power_avg = ch_info->curr_txpow =
4816                             eeprom_ch_info[ch].max_power_avg;
4817                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4818                         ch_info->min_power = 0;
4819
4820                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s%s(0x%02x"
4821                                        " %ddBm): Ad-Hoc %ssupported\n",
4822                                        ch_info->channel,
4823                                        is_channel_a_band(ch_info) ?
4824                                        "5.2" : "2.4",
4825                                        CHECK_AND_PRINT(VALID),
4826                                        CHECK_AND_PRINT(IBSS),
4827                                        CHECK_AND_PRINT(ACTIVE),
4828                                        CHECK_AND_PRINT(RADAR),
4829                                        CHECK_AND_PRINT(WIDE),
4830                                        CHECK_AND_PRINT(NARROW),
4831                                        CHECK_AND_PRINT(DFS),
4832                                        eeprom_ch_info[ch].flags,
4833                                        eeprom_ch_info[ch].max_power_avg,
4834                                        ((eeprom_ch_info[ch].
4835                                          flags & EEPROM_CHANNEL_IBSS)
4836                                         && !(eeprom_ch_info[ch].
4837                                              flags & EEPROM_CHANNEL_RADAR))
4838                                        ? "" : "not ");
4839
4840                         /* Set the user_txpower_limit to the highest power
4841                          * supported by any channel */
4842                         if (eeprom_ch_info[ch].max_power_avg >
4843                             priv->user_txpower_limit)
4844                                 priv->user_txpower_limit =
4845                                     eeprom_ch_info[ch].max_power_avg;
4846
4847                         ch_info++;
4848                 }
4849         }
4850
4851         /* Set up txpower settings in driver for all channels */
4852         if (iwl3945_txpower_set_from_eeprom(priv))
4853                 return -EIO;
4854
4855         return 0;
4856 }
4857
4858 /*
4859  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4860  */
4861 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4862 {
4863         kfree(priv->channel_info);
4864         priv->channel_count = 0;
4865 }
4866
4867 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4868  * sending probe req.  This should be set long enough to hear probe responses
4869  * from more than one AP.  */
4870 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4871 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4872
4873 /* For faster active scanning, scan will move to the next channel if fewer than
4874  * PLCP_QUIET_THRESH packets are heard on this channel within
4875  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4876  * time if it's a quiet channel (nothing responded to our probe, and there's
4877  * no other traffic).
4878  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4879 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4880 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4881
4882 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4883  * Must be set longer than active dwell time.
4884  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4885 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4886 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4887 #define IWL_PASSIVE_DWELL_BASE      (100)
4888 #define IWL_CHANNEL_TUNE_TIME       5
4889
4890 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4891                                                 enum ieee80211_band band)
4892 {
4893         if (band == IEEE80211_BAND_5GHZ)
4894                 return IWL_ACTIVE_DWELL_TIME_52;
4895         else
4896                 return IWL_ACTIVE_DWELL_TIME_24;
4897 }
4898
4899 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4900                                           enum ieee80211_band band)
4901 {
4902         u16 active = iwl3945_get_active_dwell_time(priv, band);
4903         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4904             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4905             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4906
4907         if (iwl3945_is_associated(priv)) {
4908                 /* If we're associated, we clamp the maximum passive
4909                  * dwell time to be 98% of the beacon interval (minus
4910                  * 2 * channel tune time) */
4911                 passive = priv->beacon_int;
4912                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4913                         passive = IWL_PASSIVE_DWELL_BASE;
4914                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4915         }
4916
4917         if (passive <= active)
4918                 passive = active + 1;
4919
4920         return passive;
4921 }
4922
4923 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4924                                          enum ieee80211_band band,
4925                                      u8 is_active, u8 direct_mask,
4926                                      struct iwl3945_scan_channel *scan_ch)
4927 {
4928         const struct ieee80211_channel *channels = NULL;
4929         const struct ieee80211_supported_band *sband;
4930         const struct iwl3945_channel_info *ch_info;
4931         u16 passive_dwell = 0;
4932         u16 active_dwell = 0;
4933         int added, i;
4934
4935         sband = iwl3945_get_band(priv, band);
4936         if (!sband)
4937                 return 0;
4938
4939         channels = sband->channels;
4940
4941         active_dwell = iwl3945_get_active_dwell_time(priv, band);
4942         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4943
4944         for (i = 0, added = 0; i < sband->n_channels; i++) {
4945                 if (channels[i].hw_value ==
4946                     le16_to_cpu(priv->active_rxon.channel)) {
4947                         if (iwl3945_is_associated(priv)) {
4948                                 IWL_DEBUG_SCAN
4949                                     ("Skipping current channel %d\n",
4950                                      le16_to_cpu(priv->active_rxon.channel));
4951                                 continue;
4952                         }
4953                 } else if (priv->only_active_channel)
4954                         continue;
4955
4956                 scan_ch->channel = channels[i].hw_value;
4957
4958                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4959                 if (!is_channel_valid(ch_info)) {
4960                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4961                                        scan_ch->channel);
4962                         continue;
4963                 }
4964
4965                 if (!is_active || is_channel_passive(ch_info) ||
4966                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4967                         scan_ch->type = 0;      /* passive */
4968                 else
4969                         scan_ch->type = 1;      /* active */
4970
4971                 if (scan_ch->type & 1)
4972                         scan_ch->type |= (direct_mask << 1);
4973
4974                 if (is_channel_narrow(ch_info))
4975                         scan_ch->type |= (1 << 7);
4976
4977                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4978                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4979
4980                 /* Set txpower levels to defaults */
4981                 scan_ch->tpc.dsp_atten = 110;
4982                 /* scan_pwr_info->tpc.dsp_atten; */
4983
4984                 /*scan_pwr_info->tpc.tx_gain; */
4985                 if (band == IEEE80211_BAND_5GHZ)
4986                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4987                 else {
4988                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4989                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4990                          * power level:
4991                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4992                          */
4993                 }
4994
4995                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4996                                scan_ch->channel,
4997                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4998                                (scan_ch->type & 1) ?
4999                                active_dwell : passive_dwell);
5000
5001                 scan_ch++;
5002                 added++;
5003         }
5004
5005         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5006         return added;
5007 }
5008
5009 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5010                               struct ieee80211_rate *rates)
5011 {
5012         int i;
5013
5014         for (i = 0; i < IWL_RATE_COUNT; i++) {
5015                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
5016                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5017                 rates[i].hw_value_short = i;
5018                 rates[i].flags = 0;
5019                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5020                         /*
5021                          * If CCK != 1M then set short preamble rate flag.
5022                          */
5023                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5024                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5025                 }
5026         }
5027 }
5028
5029 /**
5030  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5031  */
5032 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5033 {
5034         struct iwl3945_channel_info *ch;
5035         struct ieee80211_supported_band *sband;
5036         struct ieee80211_channel *channels;
5037         struct ieee80211_channel *geo_ch;
5038         struct ieee80211_rate *rates;
5039         int i = 0;
5040
5041         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5042             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5043                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5044                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5045                 return 0;
5046         }
5047
5048         channels = kzalloc(sizeof(struct ieee80211_channel) *
5049                            priv->channel_count, GFP_KERNEL);
5050         if (!channels)
5051                 return -ENOMEM;
5052
5053         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5054                         GFP_KERNEL);
5055         if (!rates) {
5056                 kfree(channels);
5057                 return -ENOMEM;
5058         }
5059
5060         /* 5.2GHz channels start after the 2.4GHz channels */
5061         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5062         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5063         /* just OFDM */
5064         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5065         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5066
5067         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5068         sband->channels = channels;
5069         /* OFDM & CCK */
5070         sband->bitrates = rates;
5071         sband->n_bitrates = IWL_RATE_COUNT;
5072
5073         priv->ieee_channels = channels;
5074         priv->ieee_rates = rates;
5075
5076         iwl3945_init_hw_rates(priv, rates);
5077
5078         for (i = 0;  i < priv->channel_count; i++) {
5079                 ch = &priv->channel_info[i];
5080
5081                 /* FIXME: might be removed if scan is OK*/
5082                 if (!is_channel_valid(ch))
5083                         continue;
5084
5085                 if (is_channel_a_band(ch))
5086                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5087                 else
5088                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5089
5090                 geo_ch = &sband->channels[sband->n_channels++];
5091
5092                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5093                 geo_ch->max_power = ch->max_power_avg;
5094                 geo_ch->max_antenna_gain = 0xff;
5095                 geo_ch->hw_value = ch->channel;
5096
5097                 if (is_channel_valid(ch)) {
5098                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5099                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5100
5101                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5102                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5103
5104                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5105                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5106
5107                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5108                                 priv->max_channel_txpower_limit =
5109                                     ch->max_power_avg;
5110                 } else {
5111                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5112                 }
5113
5114                 /* Save flags for reg domain usage */
5115                 geo_ch->orig_flags = geo_ch->flags;
5116
5117                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5118                                 ch->channel, geo_ch->center_freq,
5119                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5120                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5121                                 "restricted" : "valid",
5122                                  geo_ch->flags);
5123         }
5124
5125         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5126              priv->cfg->sku & IWL_SKU_A) {
5127                 printk(KERN_INFO DRV_NAME
5128                        ": Incorrectly detected BG card as ABG.  Please send "
5129                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5130                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5131                  priv->cfg->sku &= ~IWL_SKU_A;
5132         }
5133
5134         printk(KERN_INFO DRV_NAME
5135                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5136                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5137                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5138
5139         priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ];
5140         priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ];
5141
5142         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5143
5144         return 0;
5145 }
5146
5147 /*
5148  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5149  */
5150 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5151 {
5152         kfree(priv->ieee_channels);
5153         kfree(priv->ieee_rates);
5154         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5155 }
5156
5157 /******************************************************************************
5158  *
5159  * uCode download functions
5160  *
5161  ******************************************************************************/
5162
5163 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5164 {
5165         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5166         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5167         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5168         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5169         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5170         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5171 }
5172
5173 /**
5174  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5175  *     looking at all data.
5176  */
5177 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5178 {
5179         u32 val;
5180         u32 save_len = len;
5181         int rc = 0;
5182         u32 errcnt;
5183
5184         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5185
5186         rc = iwl3945_grab_nic_access(priv);
5187         if (rc)
5188                 return rc;
5189
5190         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5191
5192         errcnt = 0;
5193         for (; len > 0; len -= sizeof(u32), image++) {
5194                 /* read data comes through single port, auto-incr addr */
5195                 /* NOTE: Use the debugless read so we don't flood kernel log
5196                  * if IWL_DL_IO is set */
5197                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5198                 if (val != le32_to_cpu(*image)) {
5199                         IWL_ERROR("uCode INST section is invalid at "
5200                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5201                                   save_len - len, val, le32_to_cpu(*image));
5202                         rc = -EIO;
5203                         errcnt++;
5204                         if (errcnt >= 20)
5205                                 break;
5206                 }
5207         }
5208
5209         iwl3945_release_nic_access(priv);
5210
5211         if (!errcnt)
5212                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5213
5214         return rc;
5215 }
5216
5217
5218 /**
5219  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5220  *   using sample data 100 bytes apart.  If these sample points are good,
5221  *   it's a pretty good bet that everything between them is good, too.
5222  */
5223 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5224 {
5225         u32 val;
5226         int rc = 0;
5227         u32 errcnt = 0;
5228         u32 i;
5229
5230         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5231
5232         rc = iwl3945_grab_nic_access(priv);
5233         if (rc)
5234                 return rc;
5235
5236         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5237                 /* read data comes through single port, auto-incr addr */
5238                 /* NOTE: Use the debugless read so we don't flood kernel log
5239                  * if IWL_DL_IO is set */
5240                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5241                         i + RTC_INST_LOWER_BOUND);
5242                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5243                 if (val != le32_to_cpu(*image)) {
5244 #if 0 /* Enable this if you want to see details */
5245                         IWL_ERROR("uCode INST section is invalid at "
5246                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5247                                   i, val, *image);
5248 #endif
5249                         rc = -EIO;
5250                         errcnt++;
5251                         if (errcnt >= 3)
5252                                 break;
5253                 }
5254         }
5255
5256         iwl3945_release_nic_access(priv);
5257
5258         return rc;
5259 }
5260
5261
5262 /**
5263  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5264  *    and verify its contents
5265  */
5266 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5267 {
5268         __le32 *image;
5269         u32 len;
5270         int rc = 0;
5271
5272         /* Try bootstrap */
5273         image = (__le32 *)priv->ucode_boot.v_addr;
5274         len = priv->ucode_boot.len;
5275         rc = iwl3945_verify_inst_sparse(priv, image, len);
5276         if (rc == 0) {
5277                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5278                 return 0;
5279         }
5280
5281         /* Try initialize */
5282         image = (__le32 *)priv->ucode_init.v_addr;
5283         len = priv->ucode_init.len;
5284         rc = iwl3945_verify_inst_sparse(priv, image, len);
5285         if (rc == 0) {
5286                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5287                 return 0;
5288         }
5289
5290         /* Try runtime/protocol */
5291         image = (__le32 *)priv->ucode_code.v_addr;
5292         len = priv->ucode_code.len;
5293         rc = iwl3945_verify_inst_sparse(priv, image, len);
5294         if (rc == 0) {
5295                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5296                 return 0;
5297         }
5298
5299         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5300
5301         /* Since nothing seems to match, show first several data entries in
5302          * instruction SRAM, so maybe visual inspection will give a clue.
5303          * Selection of bootstrap image (vs. other images) is arbitrary. */
5304         image = (__le32 *)priv->ucode_boot.v_addr;
5305         len = priv->ucode_boot.len;
5306         rc = iwl3945_verify_inst_full(priv, image, len);
5307
5308         return rc;
5309 }
5310
5311
5312 /* check contents of special bootstrap uCode SRAM */
5313 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5314 {
5315         __le32 *image = priv->ucode_boot.v_addr;
5316         u32 len = priv->ucode_boot.len;
5317         u32 reg;
5318         u32 val;
5319
5320         IWL_DEBUG_INFO("Begin verify bsm\n");
5321
5322         /* verify BSM SRAM contents */
5323         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5324         for (reg = BSM_SRAM_LOWER_BOUND;
5325              reg < BSM_SRAM_LOWER_BOUND + len;
5326              reg += sizeof(u32), image ++) {
5327                 val = iwl3945_read_prph(priv, reg);
5328                 if (val != le32_to_cpu(*image)) {
5329                         IWL_ERROR("BSM uCode verification failed at "
5330                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5331                                   BSM_SRAM_LOWER_BOUND,
5332                                   reg - BSM_SRAM_LOWER_BOUND, len,
5333                                   val, le32_to_cpu(*image));
5334                         return -EIO;
5335                 }
5336         }
5337
5338         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5339
5340         return 0;
5341 }
5342
5343 /**
5344  * iwl3945_load_bsm - Load bootstrap instructions
5345  *
5346  * BSM operation:
5347  *
5348  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5349  * in special SRAM that does not power down during RFKILL.  When powering back
5350  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5351  * the bootstrap program into the on-board processor, and starts it.
5352  *
5353  * The bootstrap program loads (via DMA) instructions and data for a new
5354  * program from host DRAM locations indicated by the host driver in the
5355  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5356  * automatically.
5357  *
5358  * When initializing the NIC, the host driver points the BSM to the
5359  * "initialize" uCode image.  This uCode sets up some internal data, then
5360  * notifies host via "initialize alive" that it is complete.
5361  *
5362  * The host then replaces the BSM_DRAM_* pointer values to point to the
5363  * normal runtime uCode instructions and a backup uCode data cache buffer
5364  * (filled initially with starting data values for the on-board processor),
5365  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5366  * which begins normal operation.
5367  *
5368  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5369  * the backup data cache in DRAM before SRAM is powered down.
5370  *
5371  * When powering back up, the BSM loads the bootstrap program.  This reloads
5372  * the runtime uCode instructions and the backup data cache into SRAM,
5373  * and re-launches the runtime uCode from where it left off.
5374  */
5375 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5376 {
5377         __le32 *image = priv->ucode_boot.v_addr;
5378         u32 len = priv->ucode_boot.len;
5379         dma_addr_t pinst;
5380         dma_addr_t pdata;
5381         u32 inst_len;
5382         u32 data_len;
5383         int rc;
5384         int i;
5385         u32 done;
5386         u32 reg_offset;
5387
5388         IWL_DEBUG_INFO("Begin load bsm\n");
5389
5390         /* make sure bootstrap program is no larger than BSM's SRAM size */
5391         if (len > IWL_MAX_BSM_SIZE)
5392                 return -EINVAL;
5393
5394         /* Tell bootstrap uCode where to find the "Initialize" uCode
5395          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5396          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5397          *        after the "initialize" uCode has run, to point to
5398          *        runtime/protocol instructions and backup data cache. */
5399         pinst = priv->ucode_init.p_addr;
5400         pdata = priv->ucode_init_data.p_addr;
5401         inst_len = priv->ucode_init.len;
5402         data_len = priv->ucode_init_data.len;
5403
5404         rc = iwl3945_grab_nic_access(priv);
5405         if (rc)
5406                 return rc;
5407
5408         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5409         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5410         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5411         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5412
5413         /* Fill BSM memory with bootstrap instructions */
5414         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5415              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5416              reg_offset += sizeof(u32), image++)
5417                 _iwl3945_write_prph(priv, reg_offset,
5418                                           le32_to_cpu(*image));
5419
5420         rc = iwl3945_verify_bsm(priv);
5421         if (rc) {
5422                 iwl3945_release_nic_access(priv);
5423                 return rc;
5424         }
5425
5426         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5427         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5428         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5429                                  RTC_INST_LOWER_BOUND);
5430         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5431
5432         /* Load bootstrap code into instruction SRAM now,
5433          *   to prepare to load "initialize" uCode */
5434         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5435                 BSM_WR_CTRL_REG_BIT_START);
5436
5437         /* Wait for load of bootstrap uCode to finish */
5438         for (i = 0; i < 100; i++) {
5439                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5440                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5441                         break;
5442                 udelay(10);
5443         }
5444         if (i < 100)
5445                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5446         else {
5447                 IWL_ERROR("BSM write did not complete!\n");
5448                 return -EIO;
5449         }
5450
5451         /* Enable future boot loads whenever power management unit triggers it
5452          *   (e.g. when powering back up after power-save shutdown) */
5453         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5454                 BSM_WR_CTRL_REG_BIT_START_EN);
5455
5456         iwl3945_release_nic_access(priv);
5457
5458         return 0;
5459 }
5460
5461 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5462 {
5463         /* Remove all resets to allow NIC to operate */
5464         iwl3945_write32(priv, CSR_RESET, 0);
5465 }
5466
5467 /**
5468  * iwl3945_read_ucode - Read uCode images from disk file.
5469  *
5470  * Copy into buffers for card to fetch via bus-mastering
5471  */
5472 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5473 {
5474         struct iwl3945_ucode *ucode;
5475         int ret = 0;
5476         const struct firmware *ucode_raw;
5477         /* firmware file name contains uCode/driver compatibility version */
5478         const char *name = priv->cfg->fw_name;
5479         u8 *src;
5480         size_t len;
5481         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5482
5483         /* Ask kernel firmware_class module to get the boot firmware off disk.
5484          * request_firmware() is synchronous, file is in memory on return. */
5485         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5486         if (ret < 0) {
5487                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5488                                 name, ret);
5489                 goto error;
5490         }
5491
5492         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5493                        name, ucode_raw->size);
5494
5495         /* Make sure that we got at least our header! */
5496         if (ucode_raw->size < sizeof(*ucode)) {
5497                 IWL_ERROR("File size way too small!\n");
5498                 ret = -EINVAL;
5499                 goto err_release;
5500         }
5501
5502         /* Data from ucode file:  header followed by uCode images */
5503         ucode = (void *)ucode_raw->data;
5504
5505         ver = le32_to_cpu(ucode->ver);
5506         inst_size = le32_to_cpu(ucode->inst_size);
5507         data_size = le32_to_cpu(ucode->data_size);
5508         init_size = le32_to_cpu(ucode->init_size);
5509         init_data_size = le32_to_cpu(ucode->init_data_size);
5510         boot_size = le32_to_cpu(ucode->boot_size);
5511
5512         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5513         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5514         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5515         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5516         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5517         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5518
5519         /* Verify size of file vs. image size info in file's header */
5520         if (ucode_raw->size < sizeof(*ucode) +
5521                 inst_size + data_size + init_size +
5522                 init_data_size + boot_size) {
5523
5524                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5525                                (int)ucode_raw->size);
5526                 ret = -EINVAL;
5527                 goto err_release;
5528         }
5529
5530         /* Verify that uCode images will fit in card's SRAM */
5531         if (inst_size > IWL_MAX_INST_SIZE) {
5532                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5533                                inst_size);
5534                 ret = -EINVAL;
5535                 goto err_release;
5536         }
5537
5538         if (data_size > IWL_MAX_DATA_SIZE) {
5539                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5540                                data_size);
5541                 ret = -EINVAL;
5542                 goto err_release;
5543         }
5544         if (init_size > IWL_MAX_INST_SIZE) {
5545                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5546                                 init_size);
5547                 ret = -EINVAL;
5548                 goto err_release;
5549         }
5550         if (init_data_size > IWL_MAX_DATA_SIZE) {
5551                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5552                                 init_data_size);
5553                 ret = -EINVAL;
5554                 goto err_release;
5555         }
5556         if (boot_size > IWL_MAX_BSM_SIZE) {
5557                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5558                                 boot_size);
5559                 ret = -EINVAL;
5560                 goto err_release;
5561         }
5562
5563         /* Allocate ucode buffers for card's bus-master loading ... */
5564
5565         /* Runtime instructions and 2 copies of data:
5566          * 1) unmodified from disk
5567          * 2) backup cache for save/restore during power-downs */
5568         priv->ucode_code.len = inst_size;
5569         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5570
5571         priv->ucode_data.len = data_size;
5572         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5573
5574         priv->ucode_data_backup.len = data_size;
5575         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5576
5577         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5578             !priv->ucode_data_backup.v_addr)
5579                 goto err_pci_alloc;
5580
5581         /* Initialization instructions and data */
5582         if (init_size && init_data_size) {
5583                 priv->ucode_init.len = init_size;
5584                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5585
5586                 priv->ucode_init_data.len = init_data_size;
5587                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5588
5589                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5590                         goto err_pci_alloc;
5591         }
5592
5593         /* Bootstrap (instructions only, no data) */
5594         if (boot_size) {
5595                 priv->ucode_boot.len = boot_size;
5596                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5597
5598                 if (!priv->ucode_boot.v_addr)
5599                         goto err_pci_alloc;
5600         }
5601
5602         /* Copy images into buffers for card's bus-master reads ... */
5603
5604         /* Runtime instructions (first block of data in file) */
5605         src = &ucode->data[0];
5606         len = priv->ucode_code.len;
5607         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5608         memcpy(priv->ucode_code.v_addr, src, len);
5609         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5610                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5611
5612         /* Runtime data (2nd block)
5613          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5614         src = &ucode->data[inst_size];
5615         len = priv->ucode_data.len;
5616         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5617         memcpy(priv->ucode_data.v_addr, src, len);
5618         memcpy(priv->ucode_data_backup.v_addr, src, len);
5619
5620         /* Initialization instructions (3rd block) */
5621         if (init_size) {
5622                 src = &ucode->data[inst_size + data_size];
5623                 len = priv->ucode_init.len;
5624                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5625                                len);
5626                 memcpy(priv->ucode_init.v_addr, src, len);
5627         }
5628
5629         /* Initialization data (4th block) */
5630         if (init_data_size) {
5631                 src = &ucode->data[inst_size + data_size + init_size];
5632                 len = priv->ucode_init_data.len;
5633                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5634                                (int)len);
5635                 memcpy(priv->ucode_init_data.v_addr, src, len);
5636         }
5637
5638         /* Bootstrap instructions (5th block) */
5639         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5640         len = priv->ucode_boot.len;
5641         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5642                        (int)len);
5643         memcpy(priv->ucode_boot.v_addr, src, len);
5644
5645         /* We have our copies now, allow OS release its copies */
5646         release_firmware(ucode_raw);
5647         return 0;
5648
5649  err_pci_alloc:
5650         IWL_ERROR("failed to allocate pci memory\n");
5651         ret = -ENOMEM;
5652         iwl3945_dealloc_ucode_pci(priv);
5653
5654  err_release:
5655         release_firmware(ucode_raw);
5656
5657  error:
5658         return ret;
5659 }
5660
5661
5662 /**
5663  * iwl3945_set_ucode_ptrs - Set uCode address location
5664  *
5665  * Tell initialization uCode where to find runtime uCode.
5666  *
5667  * BSM registers initially contain pointers to initialization uCode.
5668  * We need to replace them to load runtime uCode inst and data,
5669  * and to save runtime data when powering down.
5670  */
5671 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5672 {
5673         dma_addr_t pinst;
5674         dma_addr_t pdata;
5675         int rc = 0;
5676         unsigned long flags;
5677
5678         /* bits 31:0 for 3945 */
5679         pinst = priv->ucode_code.p_addr;
5680         pdata = priv->ucode_data_backup.p_addr;
5681
5682         spin_lock_irqsave(&priv->lock, flags);
5683         rc = iwl3945_grab_nic_access(priv);
5684         if (rc) {
5685                 spin_unlock_irqrestore(&priv->lock, flags);
5686                 return rc;
5687         }
5688
5689         /* Tell bootstrap uCode where to find image to load */
5690         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5691         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5692         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5693                                  priv->ucode_data.len);
5694
5695         /* Inst bytecount must be last to set up, bit 31 signals uCode
5696          *   that all new ptr/size info is in place */
5697         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5698                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5699
5700         iwl3945_release_nic_access(priv);
5701
5702         spin_unlock_irqrestore(&priv->lock, flags);
5703
5704         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5705
5706         return rc;
5707 }
5708
5709 /**
5710  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5711  *
5712  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5713  *
5714  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5715  */
5716 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5717 {
5718         /* Check alive response for "valid" sign from uCode */
5719         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5720                 /* We had an error bringing up the hardware, so take it
5721                  * all the way back down so we can try again */
5722                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5723                 goto restart;
5724         }
5725
5726         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5727          * This is a paranoid check, because we would not have gotten the
5728          * "initialize" alive if code weren't properly loaded.  */
5729         if (iwl3945_verify_ucode(priv)) {
5730                 /* Runtime instruction load was bad;
5731                  * take it all the way back down so we can try again */
5732                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5733                 goto restart;
5734         }
5735
5736         /* Send pointers to protocol/runtime uCode image ... init code will
5737          * load and launch runtime uCode, which will send us another "Alive"
5738          * notification. */
5739         IWL_DEBUG_INFO("Initialization Alive received.\n");
5740         if (iwl3945_set_ucode_ptrs(priv)) {
5741                 /* Runtime instruction load won't happen;
5742                  * take it all the way back down so we can try again */
5743                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5744                 goto restart;
5745         }
5746         return;
5747
5748  restart:
5749         queue_work(priv->workqueue, &priv->restart);
5750 }
5751
5752
5753 /**
5754  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5755  *                   from protocol/runtime uCode (initialization uCode's
5756  *                   Alive gets handled by iwl3945_init_alive_start()).
5757  */
5758 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5759 {
5760         int rc = 0;
5761         int thermal_spin = 0;
5762         u32 rfkill;
5763
5764         IWL_DEBUG_INFO("Runtime Alive received.\n");
5765
5766         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5767                 /* We had an error bringing up the hardware, so take it
5768                  * all the way back down so we can try again */
5769                 IWL_DEBUG_INFO("Alive failed.\n");
5770                 goto restart;
5771         }
5772
5773         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5774          * This is a paranoid check, because we would not have gotten the
5775          * "runtime" alive if code weren't properly loaded.  */
5776         if (iwl3945_verify_ucode(priv)) {
5777                 /* Runtime instruction load was bad;
5778                  * take it all the way back down so we can try again */
5779                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5780                 goto restart;
5781         }
5782
5783         iwl3945_clear_stations_table(priv);
5784
5785         rc = iwl3945_grab_nic_access(priv);
5786         if (rc) {
5787                 IWL_WARNING("Can not read rfkill status from adapter\n");
5788                 return;
5789         }
5790
5791         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5792         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5793         iwl3945_release_nic_access(priv);
5794
5795         if (rfkill & 0x1) {
5796                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5797                 /* if rfkill is not on, then wait for thermal
5798                  * sensor in adapter to kick in */
5799                 while (iwl3945_hw_get_temperature(priv) == 0) {
5800                         thermal_spin++;
5801                         udelay(10);
5802                 }
5803
5804                 if (thermal_spin)
5805                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5806                                        thermal_spin * 10);
5807         } else
5808                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5809
5810         /* After the ALIVE response, we can send commands to 3945 uCode */
5811         set_bit(STATUS_ALIVE, &priv->status);
5812
5813         /* Clear out the uCode error bit if it is set */
5814         clear_bit(STATUS_FW_ERROR, &priv->status);
5815
5816         if (iwl3945_is_rfkill(priv))
5817                 return;
5818
5819         ieee80211_start_queues(priv->hw);
5820
5821         priv->active_rate = priv->rates_mask;
5822         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5823
5824         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5825
5826         if (iwl3945_is_associated(priv)) {
5827                 struct iwl3945_rxon_cmd *active_rxon =
5828                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5829
5830                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5831                        sizeof(priv->staging_rxon));
5832                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5833         } else {
5834                 /* Initialize our rx_config data */
5835                 iwl3945_connection_init_rx_config(priv);
5836                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5837         }
5838
5839         /* Configure Bluetooth device coexistence support */
5840         iwl3945_send_bt_config(priv);
5841
5842         /* Configure the adapter for unassociated operation */
5843         iwl3945_commit_rxon(priv);
5844
5845         /* At this point, the NIC is initialized and operational */
5846         priv->notif_missed_beacons = 0;
5847         set_bit(STATUS_READY, &priv->status);
5848
5849         iwl3945_reg_txpower_periodic(priv);
5850
5851         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5852         wake_up_interruptible(&priv->wait_command_queue);
5853
5854         if (priv->error_recovering)
5855                 iwl3945_error_recovery(priv);
5856
5857         return;
5858
5859  restart:
5860         queue_work(priv->workqueue, &priv->restart);
5861 }
5862
5863 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5864
5865 static void __iwl3945_down(struct iwl3945_priv *priv)
5866 {
5867         unsigned long flags;
5868         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5869         struct ieee80211_conf *conf = NULL;
5870
5871         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5872
5873         conf = ieee80211_get_hw_conf(priv->hw);
5874
5875         if (!exit_pending)
5876                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5877
5878         iwl3945_clear_stations_table(priv);
5879
5880         /* Unblock any waiting calls */
5881         wake_up_interruptible_all(&priv->wait_command_queue);
5882
5883         /* Wipe out the EXIT_PENDING status bit if we are not actually
5884          * exiting the module */
5885         if (!exit_pending)
5886                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5887
5888         /* stop and reset the on-board processor */
5889         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5890
5891         /* tell the device to stop sending interrupts */
5892         iwl3945_disable_interrupts(priv);
5893
5894         if (priv->mac80211_registered)
5895                 ieee80211_stop_queues(priv->hw);
5896
5897         /* If we have not previously called iwl3945_init() then
5898          * clear all bits but the RF Kill and SUSPEND bits and return */
5899         if (!iwl3945_is_init(priv)) {
5900                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5901                                         STATUS_RF_KILL_HW |
5902                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5903                                         STATUS_RF_KILL_SW |
5904                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5905                                         STATUS_GEO_CONFIGURED |
5906                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5907                                         STATUS_IN_SUSPEND;
5908                 goto exit;
5909         }
5910
5911         /* ...otherwise clear out all the status bits but the RF Kill and
5912          * SUSPEND bits and continue taking the NIC down. */
5913         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5914                                 STATUS_RF_KILL_HW |
5915                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5916                                 STATUS_RF_KILL_SW |
5917                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5918                                 STATUS_GEO_CONFIGURED |
5919                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5920                                 STATUS_IN_SUSPEND |
5921                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5922                                 STATUS_FW_ERROR;
5923
5924         spin_lock_irqsave(&priv->lock, flags);
5925         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5926         spin_unlock_irqrestore(&priv->lock, flags);
5927
5928         iwl3945_hw_txq_ctx_stop(priv);
5929         iwl3945_hw_rxq_stop(priv);
5930
5931         spin_lock_irqsave(&priv->lock, flags);
5932         if (!iwl3945_grab_nic_access(priv)) {
5933                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5934                                          APMG_CLK_VAL_DMA_CLK_RQT);
5935                 iwl3945_release_nic_access(priv);
5936         }
5937         spin_unlock_irqrestore(&priv->lock, flags);
5938
5939         udelay(5);
5940
5941         iwl3945_hw_nic_stop_master(priv);
5942         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5943         iwl3945_hw_nic_reset(priv);
5944
5945  exit:
5946         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5947
5948         if (priv->ibss_beacon)
5949                 dev_kfree_skb(priv->ibss_beacon);
5950         priv->ibss_beacon = NULL;
5951
5952         /* clear out any free frames */
5953         iwl3945_clear_free_frames(priv);
5954 }
5955
5956 static void iwl3945_down(struct iwl3945_priv *priv)
5957 {
5958         mutex_lock(&priv->mutex);
5959         __iwl3945_down(priv);
5960         mutex_unlock(&priv->mutex);
5961
5962         iwl3945_cancel_deferred_work(priv);
5963 }
5964
5965 #define MAX_HW_RESTARTS 5
5966
5967 static int __iwl3945_up(struct iwl3945_priv *priv)
5968 {
5969         int rc, i;
5970
5971         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5972                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5973                 return -EIO;
5974         }
5975
5976         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5977                 IWL_WARNING("Radio disabled by SW RF kill (module "
5978                             "parameter)\n");
5979                 return -ENODEV;
5980         }
5981
5982         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5983                 IWL_ERROR("ucode not available for device bringup\n");
5984                 return -EIO;
5985         }
5986
5987         /* If platform's RF_KILL switch is NOT set to KILL */
5988         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
5989                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5990                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5991         else {
5992                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5993                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5994                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5995                         return -ENODEV;
5996                 }
5997         }
5998
5999         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6000
6001         rc = iwl3945_hw_nic_init(priv);
6002         if (rc) {
6003                 IWL_ERROR("Unable to int nic\n");
6004                 return rc;
6005         }
6006
6007         /* make sure rfkill handshake bits are cleared */
6008         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6009         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6010                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6011
6012         /* clear (again), then enable host interrupts */
6013         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6014         iwl3945_enable_interrupts(priv);
6015
6016         /* really make sure rfkill handshake bits are cleared */
6017         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6018         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6019
6020         /* Copy original ucode data image from disk into backup cache.
6021          * This will be used to initialize the on-board processor's
6022          * data SRAM for a clean start when the runtime program first loads. */
6023         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6024                priv->ucode_data.len);
6025
6026         /* We return success when we resume from suspend and rf_kill is on. */
6027         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6028                 return 0;
6029
6030         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6031
6032                 iwl3945_clear_stations_table(priv);
6033
6034                 /* load bootstrap state machine,
6035                  * load bootstrap program into processor's memory,
6036                  * prepare to load the "initialize" uCode */
6037                 rc = iwl3945_load_bsm(priv);
6038
6039                 if (rc) {
6040                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6041                         continue;
6042                 }
6043
6044                 /* start card; "initialize" will load runtime ucode */
6045                 iwl3945_nic_start(priv);
6046
6047                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6048
6049                 return 0;
6050         }
6051
6052         set_bit(STATUS_EXIT_PENDING, &priv->status);
6053         __iwl3945_down(priv);
6054
6055         /* tried to restart and config the device for as long as our
6056          * patience could withstand */
6057         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6058         return -EIO;
6059 }
6060
6061
6062 /*****************************************************************************
6063  *
6064  * Workqueue callbacks
6065  *
6066  *****************************************************************************/
6067
6068 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6069 {
6070         struct iwl3945_priv *priv =
6071             container_of(data, struct iwl3945_priv, init_alive_start.work);
6072
6073         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6074                 return;
6075
6076         mutex_lock(&priv->mutex);
6077         iwl3945_init_alive_start(priv);
6078         mutex_unlock(&priv->mutex);
6079 }
6080
6081 static void iwl3945_bg_alive_start(struct work_struct *data)
6082 {
6083         struct iwl3945_priv *priv =
6084             container_of(data, struct iwl3945_priv, alive_start.work);
6085
6086         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6087                 return;
6088
6089         mutex_lock(&priv->mutex);
6090         iwl3945_alive_start(priv);
6091         mutex_unlock(&priv->mutex);
6092 }
6093
6094 static void iwl3945_bg_rf_kill(struct work_struct *work)
6095 {
6096         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6097
6098         wake_up_interruptible(&priv->wait_command_queue);
6099
6100         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6101                 return;
6102
6103         mutex_lock(&priv->mutex);
6104
6105         if (!iwl3945_is_rfkill(priv)) {
6106                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6107                           "HW and/or SW RF Kill no longer active, restarting "
6108                           "device\n");
6109                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6110                         queue_work(priv->workqueue, &priv->restart);
6111         } else {
6112
6113                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6114                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6115                                           "disabled by SW switch\n");
6116                 else
6117                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6118                                     "Kill switch must be turned off for "
6119                                     "wireless networking to work.\n");
6120         }
6121         mutex_unlock(&priv->mutex);
6122 }
6123
6124 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6125
6126 static void iwl3945_bg_scan_check(struct work_struct *data)
6127 {
6128         struct iwl3945_priv *priv =
6129             container_of(data, struct iwl3945_priv, scan_check.work);
6130
6131         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6132                 return;
6133
6134         mutex_lock(&priv->mutex);
6135         if (test_bit(STATUS_SCANNING, &priv->status) ||
6136             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6137                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6138                           "Scan completion watchdog resetting adapter (%dms)\n",
6139                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6140
6141                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6142                         iwl3945_send_scan_abort(priv);
6143         }
6144         mutex_unlock(&priv->mutex);
6145 }
6146
6147 static void iwl3945_bg_request_scan(struct work_struct *data)
6148 {
6149         struct iwl3945_priv *priv =
6150             container_of(data, struct iwl3945_priv, request_scan);
6151         struct iwl3945_host_cmd cmd = {
6152                 .id = REPLY_SCAN_CMD,
6153                 .len = sizeof(struct iwl3945_scan_cmd),
6154                 .meta.flags = CMD_SIZE_HUGE,
6155         };
6156         int rc = 0;
6157         struct iwl3945_scan_cmd *scan;
6158         struct ieee80211_conf *conf = NULL;
6159         u8 direct_mask;
6160         enum ieee80211_band band;
6161
6162         conf = ieee80211_get_hw_conf(priv->hw);
6163
6164         mutex_lock(&priv->mutex);
6165
6166         if (!iwl3945_is_ready(priv)) {
6167                 IWL_WARNING("request scan called when driver not ready.\n");
6168                 goto done;
6169         }
6170
6171         /* Make sure the scan wasn't cancelled before this queued work
6172          * was given the chance to run... */
6173         if (!test_bit(STATUS_SCANNING, &priv->status))
6174                 goto done;
6175
6176         /* This should never be called or scheduled if there is currently
6177          * a scan active in the hardware. */
6178         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6179                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6180                                "Ignoring second request.\n");
6181                 rc = -EIO;
6182                 goto done;
6183         }
6184
6185         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6186                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6187                 goto done;
6188         }
6189
6190         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6191                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6192                 goto done;
6193         }
6194
6195         if (iwl3945_is_rfkill(priv)) {
6196                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6197                 goto done;
6198         }
6199
6200         if (!test_bit(STATUS_READY, &priv->status)) {
6201                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6202                 goto done;
6203         }
6204
6205         if (!priv->scan_bands) {
6206                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6207                 goto done;
6208         }
6209
6210         if (!priv->scan) {
6211                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6212                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6213                 if (!priv->scan) {
6214                         rc = -ENOMEM;
6215                         goto done;
6216                 }
6217         }
6218         scan = priv->scan;
6219         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6220
6221         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6222         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6223
6224         if (iwl3945_is_associated(priv)) {
6225                 u16 interval = 0;
6226                 u32 extra;
6227                 u32 suspend_time = 100;
6228                 u32 scan_suspend_time = 100;
6229                 unsigned long flags;
6230
6231                 IWL_DEBUG_INFO("Scanning while associated...\n");
6232
6233                 spin_lock_irqsave(&priv->lock, flags);
6234                 interval = priv->beacon_int;
6235                 spin_unlock_irqrestore(&priv->lock, flags);
6236
6237                 scan->suspend_time = 0;
6238                 scan->max_out_time = cpu_to_le32(200 * 1024);
6239                 if (!interval)
6240                         interval = suspend_time;
6241                 /*
6242                  * suspend time format:
6243                  *  0-19: beacon interval in usec (time before exec.)
6244                  * 20-23: 0
6245                  * 24-31: number of beacons (suspend between channels)
6246                  */
6247
6248                 extra = (suspend_time / interval) << 24;
6249                 scan_suspend_time = 0xFF0FFFFF &
6250                     (extra | ((suspend_time % interval) * 1024));
6251
6252                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6253                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6254                                scan_suspend_time, interval);
6255         }
6256
6257         /* We should add the ability for user to lock to PASSIVE ONLY */
6258         if (priv->one_direct_scan) {
6259                 IWL_DEBUG_SCAN
6260                     ("Kicking off one direct scan for '%s'\n",
6261                      iwl3945_escape_essid(priv->direct_ssid,
6262                                       priv->direct_ssid_len));
6263                 scan->direct_scan[0].id = WLAN_EID_SSID;
6264                 scan->direct_scan[0].len = priv->direct_ssid_len;
6265                 memcpy(scan->direct_scan[0].ssid,
6266                        priv->direct_ssid, priv->direct_ssid_len);
6267                 direct_mask = 1;
6268         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6269                 scan->direct_scan[0].id = WLAN_EID_SSID;
6270                 scan->direct_scan[0].len = priv->essid_len;
6271                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6272                 direct_mask = 1;
6273         } else
6274                 direct_mask = 0;
6275
6276         /* We don't build a direct scan probe request; the uCode will do
6277          * that based on the direct_mask added to each channel entry */
6278         scan->tx_cmd.len = cpu_to_le16(
6279                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6280                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6281         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6282         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6283         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6284
6285         /* flags + rate selection */
6286
6287         switch (priv->scan_bands) {
6288         case 2:
6289                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6290                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6291                 scan->good_CRC_th = 0;
6292                 band = IEEE80211_BAND_2GHZ;
6293                 break;
6294
6295         case 1:
6296                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6297                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6298                 band = IEEE80211_BAND_5GHZ;
6299                 break;
6300
6301         default:
6302                 IWL_WARNING("Invalid scan band count\n");
6303                 goto done;
6304         }
6305
6306         /* select Rx antennas */
6307         scan->flags |= iwl3945_get_antenna_flags(priv);
6308
6309         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6310                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6311
6312         if (direct_mask) {
6313                 IWL_DEBUG_SCAN
6314                     ("Initiating direct scan for %s.\n",
6315                      iwl3945_escape_essid(priv->essid, priv->essid_len));
6316                 scan->channel_count =
6317                         iwl3945_get_channels_for_scan(
6318                                 priv, band, 1, /* active */
6319                                 direct_mask,
6320                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6321         } else {
6322                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6323                 scan->channel_count =
6324                         iwl3945_get_channels_for_scan(
6325                                 priv, band, 0, /* passive */
6326                                 direct_mask,
6327                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6328         }
6329
6330         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6331             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6332         cmd.data = scan;
6333         scan->len = cpu_to_le16(cmd.len);
6334
6335         set_bit(STATUS_SCAN_HW, &priv->status);
6336         rc = iwl3945_send_cmd_sync(priv, &cmd);
6337         if (rc)
6338                 goto done;
6339
6340         queue_delayed_work(priv->workqueue, &priv->scan_check,
6341                            IWL_SCAN_CHECK_WATCHDOG);
6342
6343         mutex_unlock(&priv->mutex);
6344         return;
6345
6346  done:
6347         /* inform mac80211 scan aborted */
6348         queue_work(priv->workqueue, &priv->scan_completed);
6349         mutex_unlock(&priv->mutex);
6350 }
6351
6352 static void iwl3945_bg_up(struct work_struct *data)
6353 {
6354         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6355
6356         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6357                 return;
6358
6359         mutex_lock(&priv->mutex);
6360         __iwl3945_up(priv);
6361         mutex_unlock(&priv->mutex);
6362 }
6363
6364 static void iwl3945_bg_restart(struct work_struct *data)
6365 {
6366         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6367
6368         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6369                 return;
6370
6371         iwl3945_down(priv);
6372         queue_work(priv->workqueue, &priv->up);
6373 }
6374
6375 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6376 {
6377         struct iwl3945_priv *priv =
6378             container_of(data, struct iwl3945_priv, rx_replenish);
6379
6380         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6381                 return;
6382
6383         mutex_lock(&priv->mutex);
6384         iwl3945_rx_replenish(priv);
6385         mutex_unlock(&priv->mutex);
6386 }
6387
6388 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6389
6390 static void iwl3945_bg_post_associate(struct work_struct *data)
6391 {
6392         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6393                                              post_associate.work);
6394
6395         int rc = 0;
6396         struct ieee80211_conf *conf = NULL;
6397         DECLARE_MAC_BUF(mac);
6398
6399         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6400                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6401                 return;
6402         }
6403
6404
6405         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6406                         priv->assoc_id,
6407                         print_mac(mac, priv->active_rxon.bssid_addr));
6408
6409         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6410                 return;
6411
6412         mutex_lock(&priv->mutex);
6413
6414         if (!priv->vif || !priv->is_open) {
6415                 mutex_unlock(&priv->mutex);
6416                 return;
6417         }
6418         iwl3945_scan_cancel_timeout(priv, 200);
6419
6420         conf = ieee80211_get_hw_conf(priv->hw);
6421
6422         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6423         iwl3945_commit_rxon(priv);
6424
6425         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6426         iwl3945_setup_rxon_timing(priv);
6427         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6428                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6429         if (rc)
6430                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6431                             "Attempting to continue.\n");
6432
6433         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6434
6435         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6436
6437         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6438                         priv->assoc_id, priv->beacon_int);
6439
6440         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6441                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6442         else
6443                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6444
6445         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6446                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6447                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6448                 else
6449                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6450
6451                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6452                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6453
6454         }
6455
6456         iwl3945_commit_rxon(priv);
6457
6458         switch (priv->iw_mode) {
6459         case IEEE80211_IF_TYPE_STA:
6460                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6461                 break;
6462
6463         case IEEE80211_IF_TYPE_IBSS:
6464
6465                 /* clear out the station table */
6466                 iwl3945_clear_stations_table(priv);
6467
6468                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6469                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6470                 iwl3945_sync_sta(priv, IWL_STA_ID,
6471                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6472                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6473                                  CMD_ASYNC);
6474                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6475                 iwl3945_send_beacon_cmd(priv);
6476
6477                 break;
6478
6479         default:
6480                  IWL_ERROR("%s Should not be called in %d mode\n",
6481                            __FUNCTION__, priv->iw_mode);
6482                 break;
6483         }
6484
6485         iwl3945_sequence_reset(priv);
6486
6487         iwl3945_activate_qos(priv, 0);
6488
6489         /* we have just associated, don't start scan too early */
6490         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6491         mutex_unlock(&priv->mutex);
6492 }
6493
6494 static void iwl3945_bg_abort_scan(struct work_struct *work)
6495 {
6496         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6497
6498         if (!iwl3945_is_ready(priv))
6499                 return;
6500
6501         mutex_lock(&priv->mutex);
6502
6503         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6504         iwl3945_send_scan_abort(priv);
6505
6506         mutex_unlock(&priv->mutex);
6507 }
6508
6509 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6510
6511 static void iwl3945_bg_scan_completed(struct work_struct *work)
6512 {
6513         struct iwl3945_priv *priv =
6514             container_of(work, struct iwl3945_priv, scan_completed);
6515
6516         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6517
6518         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6519                 return;
6520
6521         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6522                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6523
6524         ieee80211_scan_completed(priv->hw);
6525
6526         /* Since setting the TXPOWER may have been deferred while
6527          * performing the scan, fire one off */
6528         mutex_lock(&priv->mutex);
6529         iwl3945_hw_reg_send_txpower(priv);
6530         mutex_unlock(&priv->mutex);
6531 }
6532
6533 /*****************************************************************************
6534  *
6535  * mac80211 entry point functions
6536  *
6537  *****************************************************************************/
6538
6539 #define UCODE_READY_TIMEOUT     (2 * HZ)
6540
6541 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6542 {
6543         struct iwl3945_priv *priv = hw->priv;
6544         int ret;
6545
6546         IWL_DEBUG_MAC80211("enter\n");
6547
6548         if (pci_enable_device(priv->pci_dev)) {
6549                 IWL_ERROR("Fail to pci_enable_device\n");
6550                 return -ENODEV;
6551         }
6552         pci_restore_state(priv->pci_dev);
6553         pci_enable_msi(priv->pci_dev);
6554
6555         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6556                           DRV_NAME, priv);
6557         if (ret) {
6558                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6559                 goto out_disable_msi;
6560         }
6561
6562         /* we should be verifying the device is ready to be opened */
6563         mutex_lock(&priv->mutex);
6564
6565         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6566         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6567          * ucode filename and max sizes are card-specific. */
6568
6569         if (!priv->ucode_code.len) {
6570                 ret = iwl3945_read_ucode(priv);
6571                 if (ret) {
6572                         IWL_ERROR("Could not read microcode: %d\n", ret);
6573                         mutex_unlock(&priv->mutex);
6574                         goto out_release_irq;
6575                 }
6576         }
6577
6578         ret = __iwl3945_up(priv);
6579
6580         mutex_unlock(&priv->mutex);
6581
6582         if (ret)
6583                 goto out_release_irq;
6584
6585         IWL_DEBUG_INFO("Start UP work.\n");
6586
6587         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6588                 return 0;
6589
6590         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6591          * mac80211 will not be run successfully. */
6592         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6593                         test_bit(STATUS_READY, &priv->status),
6594                         UCODE_READY_TIMEOUT);
6595         if (!ret) {
6596                 if (!test_bit(STATUS_READY, &priv->status)) {
6597                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6598                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6599                         ret = -ETIMEDOUT;
6600                         goto out_release_irq;
6601                 }
6602         }
6603
6604         priv->is_open = 1;
6605         IWL_DEBUG_MAC80211("leave\n");
6606         return 0;
6607
6608 out_release_irq:
6609         free_irq(priv->pci_dev->irq, priv);
6610 out_disable_msi:
6611         pci_disable_msi(priv->pci_dev);
6612         pci_disable_device(priv->pci_dev);
6613         priv->is_open = 0;
6614         IWL_DEBUG_MAC80211("leave - failed\n");
6615         return ret;
6616 }
6617
6618 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6619 {
6620         struct iwl3945_priv *priv = hw->priv;
6621
6622         IWL_DEBUG_MAC80211("enter\n");
6623
6624         if (!priv->is_open) {
6625                 IWL_DEBUG_MAC80211("leave - skip\n");
6626                 return;
6627         }
6628
6629         priv->is_open = 0;
6630
6631         if (iwl3945_is_ready_rf(priv)) {
6632                 /* stop mac, cancel any scan request and clear
6633                  * RXON_FILTER_ASSOC_MSK BIT
6634                  */
6635                 mutex_lock(&priv->mutex);
6636                 iwl3945_scan_cancel_timeout(priv, 100);
6637                 cancel_delayed_work(&priv->post_associate);
6638                 mutex_unlock(&priv->mutex);
6639         }
6640
6641         iwl3945_down(priv);
6642
6643         flush_workqueue(priv->workqueue);
6644         free_irq(priv->pci_dev->irq, priv);
6645         pci_disable_msi(priv->pci_dev);
6646         pci_save_state(priv->pci_dev);
6647         pci_disable_device(priv->pci_dev);
6648
6649         IWL_DEBUG_MAC80211("leave\n");
6650 }
6651
6652 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6653                       struct ieee80211_tx_control *ctl)
6654 {
6655         struct iwl3945_priv *priv = hw->priv;
6656
6657         IWL_DEBUG_MAC80211("enter\n");
6658
6659         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6660                 IWL_DEBUG_MAC80211("leave - monitor\n");
6661                 return -1;
6662         }
6663
6664         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6665                      ctl->tx_rate->bitrate);
6666
6667         if (iwl3945_tx_skb(priv, skb, ctl))
6668                 dev_kfree_skb_any(skb);
6669
6670         IWL_DEBUG_MAC80211("leave\n");
6671         return 0;
6672 }
6673
6674 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6675                                  struct ieee80211_if_init_conf *conf)
6676 {
6677         struct iwl3945_priv *priv = hw->priv;
6678         unsigned long flags;
6679         DECLARE_MAC_BUF(mac);
6680
6681         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6682
6683         if (priv->vif) {
6684                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6685                 return -EOPNOTSUPP;
6686         }
6687
6688         spin_lock_irqsave(&priv->lock, flags);
6689         priv->vif = conf->vif;
6690
6691         spin_unlock_irqrestore(&priv->lock, flags);
6692
6693         mutex_lock(&priv->mutex);
6694
6695         if (conf->mac_addr) {
6696                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6697                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6698         }
6699
6700         if (iwl3945_is_ready(priv))
6701                 iwl3945_set_mode(priv, conf->type);
6702
6703         mutex_unlock(&priv->mutex);
6704
6705         IWL_DEBUG_MAC80211("leave\n");
6706         return 0;
6707 }
6708
6709 /**
6710  * iwl3945_mac_config - mac80211 config callback
6711  *
6712  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6713  * be set inappropriately and the driver currently sets the hardware up to
6714  * use it whenever needed.
6715  */
6716 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6717 {
6718         struct iwl3945_priv *priv = hw->priv;
6719         const struct iwl3945_channel_info *ch_info;
6720         unsigned long flags;
6721         int ret = 0;
6722
6723         mutex_lock(&priv->mutex);
6724         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6725
6726         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6727
6728         if (!iwl3945_is_ready(priv)) {
6729                 IWL_DEBUG_MAC80211("leave - not ready\n");
6730                 ret = -EIO;
6731                 goto out;
6732         }
6733
6734         if (unlikely(!iwl3945_param_disable_hw_scan &&
6735                      test_bit(STATUS_SCANNING, &priv->status))) {
6736                 IWL_DEBUG_MAC80211("leave - scanning\n");
6737                 set_bit(STATUS_CONF_PENDING, &priv->status);
6738                 mutex_unlock(&priv->mutex);
6739                 return 0;
6740         }
6741
6742         spin_lock_irqsave(&priv->lock, flags);
6743
6744         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6745                                            conf->channel->hw_value);
6746         if (!is_channel_valid(ch_info)) {
6747                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6748                                conf->channel->hw_value, conf->channel->band);
6749                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6750                 spin_unlock_irqrestore(&priv->lock, flags);
6751                 ret = -EINVAL;
6752                 goto out;
6753         }
6754
6755         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6756
6757         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6758
6759         /* The list of supported rates and rate mask can be different
6760          * for each phymode; since the phymode may have changed, reset
6761          * the rate mask to what mac80211 lists */
6762         iwl3945_set_rate(priv);
6763
6764         spin_unlock_irqrestore(&priv->lock, flags);
6765
6766 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6767         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6768                 iwl3945_hw_channel_switch(priv, conf->channel);
6769                 goto out;
6770         }
6771 #endif
6772
6773         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6774
6775         if (!conf->radio_enabled) {
6776                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6777                 goto out;
6778         }
6779
6780         if (iwl3945_is_rfkill(priv)) {
6781                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6782                 ret = -EIO;
6783                 goto out;
6784         }
6785
6786         iwl3945_set_rate(priv);
6787
6788         if (memcmp(&priv->active_rxon,
6789                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6790                 iwl3945_commit_rxon(priv);
6791         else
6792                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6793
6794         IWL_DEBUG_MAC80211("leave\n");
6795
6796 out:
6797         clear_bit(STATUS_CONF_PENDING, &priv->status);
6798         mutex_unlock(&priv->mutex);
6799         return ret;
6800 }
6801
6802 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6803 {
6804         int rc = 0;
6805
6806         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6807                 return;
6808
6809         /* The following should be done only at AP bring up */
6810         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6811
6812                 /* RXON - unassoc (to set timing command) */
6813                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6814                 iwl3945_commit_rxon(priv);
6815
6816                 /* RXON Timing */
6817                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6818                 iwl3945_setup_rxon_timing(priv);
6819                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6820                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6821                 if (rc)
6822                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6823                                         "Attempting to continue.\n");
6824
6825                 /* FIXME: what should be the assoc_id for AP? */
6826                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6827                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6828                         priv->staging_rxon.flags |=
6829                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6830                 else
6831                         priv->staging_rxon.flags &=
6832                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6833
6834                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6835                         if (priv->assoc_capability &
6836                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6837                                 priv->staging_rxon.flags |=
6838                                         RXON_FLG_SHORT_SLOT_MSK;
6839                         else
6840                                 priv->staging_rxon.flags &=
6841                                         ~RXON_FLG_SHORT_SLOT_MSK;
6842
6843                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6844                                 priv->staging_rxon.flags &=
6845                                         ~RXON_FLG_SHORT_SLOT_MSK;
6846                 }
6847                 /* restore RXON assoc */
6848                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6849                 iwl3945_commit_rxon(priv);
6850                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6851         }
6852         iwl3945_send_beacon_cmd(priv);
6853
6854         /* FIXME - we need to add code here to detect a totally new
6855          * configuration, reset the AP, unassoc, rxon timing, assoc,
6856          * clear sta table, add BCAST sta... */
6857 }
6858
6859 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6860                                         struct ieee80211_vif *vif,
6861                                     struct ieee80211_if_conf *conf)
6862 {
6863         struct iwl3945_priv *priv = hw->priv;
6864         DECLARE_MAC_BUF(mac);
6865         unsigned long flags;
6866         int rc;
6867
6868         if (conf == NULL)
6869                 return -EIO;
6870
6871         if (priv->vif != vif) {
6872                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6873                 mutex_unlock(&priv->mutex);
6874                 return 0;
6875         }
6876
6877         /* XXX: this MUST use conf->mac_addr */
6878
6879         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6880             (!conf->beacon || !conf->ssid_len)) {
6881                 IWL_DEBUG_MAC80211
6882                     ("Leaving in AP mode because HostAPD is not ready.\n");
6883                 return 0;
6884         }
6885
6886         if (!iwl3945_is_alive(priv))
6887                 return -EAGAIN;
6888
6889         mutex_lock(&priv->mutex);
6890
6891         if (conf->bssid)
6892                 IWL_DEBUG_MAC80211("bssid: %s\n",
6893                                    print_mac(mac, conf->bssid));
6894
6895 /*
6896  * very dubious code was here; the probe filtering flag is never set:
6897  *
6898         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6899             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6900  */
6901
6902         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6903                 if (!conf->bssid) {
6904                         conf->bssid = priv->mac_addr;
6905                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6906                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6907                                            print_mac(mac, conf->bssid));
6908                 }
6909                 if (priv->ibss_beacon)
6910                         dev_kfree_skb(priv->ibss_beacon);
6911
6912                 priv->ibss_beacon = conf->beacon;
6913         }
6914
6915         if (iwl3945_is_rfkill(priv))
6916                 goto done;
6917
6918         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6919             !is_multicast_ether_addr(conf->bssid)) {
6920                 /* If there is currently a HW scan going on in the background
6921                  * then we need to cancel it else the RXON below will fail. */
6922                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6923                         IWL_WARNING("Aborted scan still in progress "
6924                                     "after 100ms\n");
6925                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6926                         mutex_unlock(&priv->mutex);
6927                         return -EAGAIN;
6928                 }
6929                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6930
6931                 /* TODO: Audit driver for usage of these members and see
6932                  * if mac80211 deprecates them (priv->bssid looks like it
6933                  * shouldn't be there, but I haven't scanned the IBSS code
6934                  * to verify) - jpk */
6935                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6936
6937                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6938                         iwl3945_config_ap(priv);
6939                 else {
6940                         rc = iwl3945_commit_rxon(priv);
6941                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6942                                 iwl3945_add_station(priv,
6943                                         priv->active_rxon.bssid_addr, 1, 0);
6944                 }
6945
6946         } else {
6947                 iwl3945_scan_cancel_timeout(priv, 100);
6948                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6949                 iwl3945_commit_rxon(priv);
6950         }
6951
6952  done:
6953         spin_lock_irqsave(&priv->lock, flags);
6954         if (!conf->ssid_len)
6955                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6956         else
6957                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6958
6959         priv->essid_len = conf->ssid_len;
6960         spin_unlock_irqrestore(&priv->lock, flags);
6961
6962         IWL_DEBUG_MAC80211("leave\n");
6963         mutex_unlock(&priv->mutex);
6964
6965         return 0;
6966 }
6967
6968 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6969                                  unsigned int changed_flags,
6970                                  unsigned int *total_flags,
6971                                  int mc_count, struct dev_addr_list *mc_list)
6972 {
6973         /*
6974          * XXX: dummy
6975          * see also iwl3945_connection_init_rx_config
6976          */
6977         *total_flags = 0;
6978 }
6979
6980 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
6981                                      struct ieee80211_if_init_conf *conf)
6982 {
6983         struct iwl3945_priv *priv = hw->priv;
6984
6985         IWL_DEBUG_MAC80211("enter\n");
6986
6987         mutex_lock(&priv->mutex);
6988
6989         if (iwl3945_is_ready_rf(priv)) {
6990                 iwl3945_scan_cancel_timeout(priv, 100);
6991                 cancel_delayed_work(&priv->post_associate);
6992                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6993                 iwl3945_commit_rxon(priv);
6994         }
6995         if (priv->vif == conf->vif) {
6996                 priv->vif = NULL;
6997                 memset(priv->bssid, 0, ETH_ALEN);
6998                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6999                 priv->essid_len = 0;
7000         }
7001         mutex_unlock(&priv->mutex);
7002
7003         IWL_DEBUG_MAC80211("leave\n");
7004 }
7005
7006 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7007 {
7008         int rc = 0;
7009         unsigned long flags;
7010         struct iwl3945_priv *priv = hw->priv;
7011
7012         IWL_DEBUG_MAC80211("enter\n");
7013
7014         mutex_lock(&priv->mutex);
7015         spin_lock_irqsave(&priv->lock, flags);
7016
7017         if (!iwl3945_is_ready_rf(priv)) {
7018                 rc = -EIO;
7019                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7020                 goto out_unlock;
7021         }
7022
7023         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7024                 rc = -EIO;
7025                 IWL_ERROR("ERROR: APs don't scan\n");
7026                 goto out_unlock;
7027         }
7028
7029         /* we don't schedule scan within next_scan_jiffies period */
7030         if (priv->next_scan_jiffies &&
7031                         time_after(priv->next_scan_jiffies, jiffies)) {
7032                 rc = -EAGAIN;
7033                 goto out_unlock;
7034         }
7035         /* if we just finished scan ask for delay */
7036         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7037                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7038                 rc = -EAGAIN;
7039                 goto out_unlock;
7040         }
7041         if (len) {
7042                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7043                                iwl3945_escape_essid(ssid, len), (int)len);
7044
7045                 priv->one_direct_scan = 1;
7046                 priv->direct_ssid_len = (u8)
7047                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7048                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7049         } else
7050                 priv->one_direct_scan = 0;
7051
7052         rc = iwl3945_scan_initiate(priv);
7053
7054         IWL_DEBUG_MAC80211("leave\n");
7055
7056 out_unlock:
7057         spin_unlock_irqrestore(&priv->lock, flags);
7058         mutex_unlock(&priv->mutex);
7059
7060         return rc;
7061 }
7062
7063 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7064                            const u8 *local_addr, const u8 *addr,
7065                            struct ieee80211_key_conf *key)
7066 {
7067         struct iwl3945_priv *priv = hw->priv;
7068         int rc = 0;
7069         u8 sta_id;
7070
7071         IWL_DEBUG_MAC80211("enter\n");
7072
7073         if (!iwl3945_param_hwcrypto) {
7074                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7075                 return -EOPNOTSUPP;
7076         }
7077
7078         if (is_zero_ether_addr(addr))
7079                 /* only support pairwise keys */
7080                 return -EOPNOTSUPP;
7081
7082         sta_id = iwl3945_hw_find_station(priv, addr);
7083         if (sta_id == IWL_INVALID_STATION) {
7084                 DECLARE_MAC_BUF(mac);
7085
7086                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7087                                    print_mac(mac, addr));
7088                 return -EINVAL;
7089         }
7090
7091         mutex_lock(&priv->mutex);
7092
7093         iwl3945_scan_cancel_timeout(priv, 100);
7094
7095         switch (cmd) {
7096         case  SET_KEY:
7097                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7098                 if (!rc) {
7099                         iwl3945_set_rxon_hwcrypto(priv, 1);
7100                         iwl3945_commit_rxon(priv);
7101                         key->hw_key_idx = sta_id;
7102                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7103                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7104                 }
7105                 break;
7106         case DISABLE_KEY:
7107                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7108                 if (!rc) {
7109                         iwl3945_set_rxon_hwcrypto(priv, 0);
7110                         iwl3945_commit_rxon(priv);
7111                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7112                 }
7113                 break;
7114         default:
7115                 rc = -EINVAL;
7116         }
7117
7118         IWL_DEBUG_MAC80211("leave\n");
7119         mutex_unlock(&priv->mutex);
7120
7121         return rc;
7122 }
7123
7124 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7125                            const struct ieee80211_tx_queue_params *params)
7126 {
7127         struct iwl3945_priv *priv = hw->priv;
7128         unsigned long flags;
7129         int q;
7130
7131         IWL_DEBUG_MAC80211("enter\n");
7132
7133         if (!iwl3945_is_ready_rf(priv)) {
7134                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7135                 return -EIO;
7136         }
7137
7138         if (queue >= AC_NUM) {
7139                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7140                 return 0;
7141         }
7142
7143         if (!priv->qos_data.qos_enable) {
7144                 priv->qos_data.qos_active = 0;
7145                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7146                 return 0;
7147         }
7148         q = AC_NUM - 1 - queue;
7149
7150         spin_lock_irqsave(&priv->lock, flags);
7151
7152         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7153         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7154         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7155         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7156                         cpu_to_le16((params->txop * 32));
7157
7158         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7159         priv->qos_data.qos_active = 1;
7160
7161         spin_unlock_irqrestore(&priv->lock, flags);
7162
7163         mutex_lock(&priv->mutex);
7164         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7165                 iwl3945_activate_qos(priv, 1);
7166         else if (priv->assoc_id && iwl3945_is_associated(priv))
7167                 iwl3945_activate_qos(priv, 0);
7168
7169         mutex_unlock(&priv->mutex);
7170
7171         IWL_DEBUG_MAC80211("leave\n");
7172         return 0;
7173 }
7174
7175 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7176                                 struct ieee80211_tx_queue_stats *stats)
7177 {
7178         struct iwl3945_priv *priv = hw->priv;
7179         int i, avail;
7180         struct iwl3945_tx_queue *txq;
7181         struct iwl3945_queue *q;
7182         unsigned long flags;
7183
7184         IWL_DEBUG_MAC80211("enter\n");
7185
7186         if (!iwl3945_is_ready_rf(priv)) {
7187                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7188                 return -EIO;
7189         }
7190
7191         spin_lock_irqsave(&priv->lock, flags);
7192
7193         for (i = 0; i < AC_NUM; i++) {
7194                 txq = &priv->txq[i];
7195                 q = &txq->q;
7196                 avail = iwl3945_queue_space(q);
7197
7198                 stats->data[i].len = q->n_window - avail;
7199                 stats->data[i].limit = q->n_window - q->high_mark;
7200                 stats->data[i].count = q->n_window;
7201
7202         }
7203         spin_unlock_irqrestore(&priv->lock, flags);
7204
7205         IWL_DEBUG_MAC80211("leave\n");
7206
7207         return 0;
7208 }
7209
7210 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7211                              struct ieee80211_low_level_stats *stats)
7212 {
7213         IWL_DEBUG_MAC80211("enter\n");
7214         IWL_DEBUG_MAC80211("leave\n");
7215
7216         return 0;
7217 }
7218
7219 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7220 {
7221         IWL_DEBUG_MAC80211("enter\n");
7222         IWL_DEBUG_MAC80211("leave\n");
7223
7224         return 0;
7225 }
7226
7227 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7228 {
7229         struct iwl3945_priv *priv = hw->priv;
7230         unsigned long flags;
7231
7232         mutex_lock(&priv->mutex);
7233         IWL_DEBUG_MAC80211("enter\n");
7234
7235         iwl3945_reset_qos(priv);
7236
7237         cancel_delayed_work(&priv->post_associate);
7238
7239         spin_lock_irqsave(&priv->lock, flags);
7240         priv->assoc_id = 0;
7241         priv->assoc_capability = 0;
7242         priv->call_post_assoc_from_beacon = 0;
7243
7244         /* new association get rid of ibss beacon skb */
7245         if (priv->ibss_beacon)
7246                 dev_kfree_skb(priv->ibss_beacon);
7247
7248         priv->ibss_beacon = NULL;
7249
7250         priv->beacon_int = priv->hw->conf.beacon_int;
7251         priv->timestamp1 = 0;
7252         priv->timestamp0 = 0;
7253         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7254                 priv->beacon_int = 0;
7255
7256         spin_unlock_irqrestore(&priv->lock, flags);
7257
7258         if (!iwl3945_is_ready_rf(priv)) {
7259                 IWL_DEBUG_MAC80211("leave - not ready\n");
7260                 mutex_unlock(&priv->mutex);
7261                 return;
7262         }
7263
7264         /* we are restarting association process
7265          * clear RXON_FILTER_ASSOC_MSK bit
7266         */
7267         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7268                 iwl3945_scan_cancel_timeout(priv, 100);
7269                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7270                 iwl3945_commit_rxon(priv);
7271         }
7272
7273         /* Per mac80211.h: This is only used in IBSS mode... */
7274         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7275
7276                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7277                 mutex_unlock(&priv->mutex);
7278                 return;
7279         }
7280
7281         priv->only_active_channel = 0;
7282
7283         iwl3945_set_rate(priv);
7284
7285         mutex_unlock(&priv->mutex);
7286
7287         IWL_DEBUG_MAC80211("leave\n");
7288
7289 }
7290
7291 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7292                                  struct ieee80211_tx_control *control)
7293 {
7294         struct iwl3945_priv *priv = hw->priv;
7295         unsigned long flags;
7296
7297         mutex_lock(&priv->mutex);
7298         IWL_DEBUG_MAC80211("enter\n");
7299
7300         if (!iwl3945_is_ready_rf(priv)) {
7301                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7302                 mutex_unlock(&priv->mutex);
7303                 return -EIO;
7304         }
7305
7306         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7307                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7308                 mutex_unlock(&priv->mutex);
7309                 return -EIO;
7310         }
7311
7312         spin_lock_irqsave(&priv->lock, flags);
7313
7314         if (priv->ibss_beacon)
7315                 dev_kfree_skb(priv->ibss_beacon);
7316
7317         priv->ibss_beacon = skb;
7318
7319         priv->assoc_id = 0;
7320
7321         IWL_DEBUG_MAC80211("leave\n");
7322         spin_unlock_irqrestore(&priv->lock, flags);
7323
7324         iwl3945_reset_qos(priv);
7325
7326         queue_work(priv->workqueue, &priv->post_associate.work);
7327
7328         mutex_unlock(&priv->mutex);
7329
7330         return 0;
7331 }
7332
7333 /*****************************************************************************
7334  *
7335  * sysfs attributes
7336  *
7337  *****************************************************************************/
7338
7339 #ifdef CONFIG_IWL3945_DEBUG
7340
7341 /*
7342  * The following adds a new attribute to the sysfs representation
7343  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7344  * used for controlling the debug level.
7345  *
7346  * See the level definitions in iwl for details.
7347  */
7348
7349 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7350 {
7351         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7352 }
7353 static ssize_t store_debug_level(struct device_driver *d,
7354                                  const char *buf, size_t count)
7355 {
7356         char *p = (char *)buf;
7357         u32 val;
7358
7359         val = simple_strtoul(p, &p, 0);
7360         if (p == buf)
7361                 printk(KERN_INFO DRV_NAME
7362                        ": %s is not in hex or decimal form.\n", buf);
7363         else
7364                 iwl3945_debug_level = val;
7365
7366         return strnlen(buf, count);
7367 }
7368
7369 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7370                    show_debug_level, store_debug_level);
7371
7372 #endif /* CONFIG_IWL3945_DEBUG */
7373
7374 static ssize_t show_rf_kill(struct device *d,
7375                             struct device_attribute *attr, char *buf)
7376 {
7377         /*
7378          * 0 - RF kill not enabled
7379          * 1 - SW based RF kill active (sysfs)
7380          * 2 - HW based RF kill active
7381          * 3 - Both HW and SW based RF kill active
7382          */
7383         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7384         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7385                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7386
7387         return sprintf(buf, "%i\n", val);
7388 }
7389
7390 static ssize_t store_rf_kill(struct device *d,
7391                              struct device_attribute *attr,
7392                              const char *buf, size_t count)
7393 {
7394         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7395
7396         mutex_lock(&priv->mutex);
7397         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7398         mutex_unlock(&priv->mutex);
7399
7400         return count;
7401 }
7402
7403 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7404
7405 static ssize_t show_temperature(struct device *d,
7406                                 struct device_attribute *attr, char *buf)
7407 {
7408         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7409
7410         if (!iwl3945_is_alive(priv))
7411                 return -EAGAIN;
7412
7413         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7414 }
7415
7416 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7417
7418 static ssize_t show_rs_window(struct device *d,
7419                               struct device_attribute *attr,
7420                               char *buf)
7421 {
7422         struct iwl3945_priv *priv = d->driver_data;
7423         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7424 }
7425 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7426
7427 static ssize_t show_tx_power(struct device *d,
7428                              struct device_attribute *attr, char *buf)
7429 {
7430         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7431         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7432 }
7433
7434 static ssize_t store_tx_power(struct device *d,
7435                               struct device_attribute *attr,
7436                               const char *buf, size_t count)
7437 {
7438         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7439         char *p = (char *)buf;
7440         u32 val;
7441
7442         val = simple_strtoul(p, &p, 10);
7443         if (p == buf)
7444                 printk(KERN_INFO DRV_NAME
7445                        ": %s is not in decimal form.\n", buf);
7446         else
7447                 iwl3945_hw_reg_set_txpower(priv, val);
7448
7449         return count;
7450 }
7451
7452 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7453
7454 static ssize_t show_flags(struct device *d,
7455                           struct device_attribute *attr, char *buf)
7456 {
7457         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7458
7459         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7460 }
7461
7462 static ssize_t store_flags(struct device *d,
7463                            struct device_attribute *attr,
7464                            const char *buf, size_t count)
7465 {
7466         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7467         u32 flags = simple_strtoul(buf, NULL, 0);
7468
7469         mutex_lock(&priv->mutex);
7470         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7471                 /* Cancel any currently running scans... */
7472                 if (iwl3945_scan_cancel_timeout(priv, 100))
7473                         IWL_WARNING("Could not cancel scan.\n");
7474                 else {
7475                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7476                                        flags);
7477                         priv->staging_rxon.flags = cpu_to_le32(flags);
7478                         iwl3945_commit_rxon(priv);
7479                 }
7480         }
7481         mutex_unlock(&priv->mutex);
7482
7483         return count;
7484 }
7485
7486 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7487
7488 static ssize_t show_filter_flags(struct device *d,
7489                                  struct device_attribute *attr, char *buf)
7490 {
7491         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7492
7493         return sprintf(buf, "0x%04X\n",
7494                 le32_to_cpu(priv->active_rxon.filter_flags));
7495 }
7496
7497 static ssize_t store_filter_flags(struct device *d,
7498                                   struct device_attribute *attr,
7499                                   const char *buf, size_t count)
7500 {
7501         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7502         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7503
7504         mutex_lock(&priv->mutex);
7505         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7506                 /* Cancel any currently running scans... */
7507                 if (iwl3945_scan_cancel_timeout(priv, 100))
7508                         IWL_WARNING("Could not cancel scan.\n");
7509                 else {
7510                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7511                                        "0x%04X\n", filter_flags);
7512                         priv->staging_rxon.filter_flags =
7513                                 cpu_to_le32(filter_flags);
7514                         iwl3945_commit_rxon(priv);
7515                 }
7516         }
7517         mutex_unlock(&priv->mutex);
7518
7519         return count;
7520 }
7521
7522 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7523                    store_filter_flags);
7524
7525 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7526
7527 static ssize_t show_measurement(struct device *d,
7528                                 struct device_attribute *attr, char *buf)
7529 {
7530         struct iwl3945_priv *priv = dev_get_drvdata(d);
7531         struct iwl3945_spectrum_notification measure_report;
7532         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7533         u8 *data = (u8 *) & measure_report;
7534         unsigned long flags;
7535
7536         spin_lock_irqsave(&priv->lock, flags);
7537         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7538                 spin_unlock_irqrestore(&priv->lock, flags);
7539                 return 0;
7540         }
7541         memcpy(&measure_report, &priv->measure_report, size);
7542         priv->measurement_status = 0;
7543         spin_unlock_irqrestore(&priv->lock, flags);
7544
7545         while (size && (PAGE_SIZE - len)) {
7546                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7547                                    PAGE_SIZE - len, 1);
7548                 len = strlen(buf);
7549                 if (PAGE_SIZE - len)
7550                         buf[len++] = '\n';
7551
7552                 ofs += 16;
7553                 size -= min(size, 16U);
7554         }
7555
7556         return len;
7557 }
7558
7559 static ssize_t store_measurement(struct device *d,
7560                                  struct device_attribute *attr,
7561                                  const char *buf, size_t count)
7562 {
7563         struct iwl3945_priv *priv = dev_get_drvdata(d);
7564         struct ieee80211_measurement_params params = {
7565                 .channel = le16_to_cpu(priv->active_rxon.channel),
7566                 .start_time = cpu_to_le64(priv->last_tsf),
7567                 .duration = cpu_to_le16(1),
7568         };
7569         u8 type = IWL_MEASURE_BASIC;
7570         u8 buffer[32];
7571         u8 channel;
7572
7573         if (count) {
7574                 char *p = buffer;
7575                 strncpy(buffer, buf, min(sizeof(buffer), count));
7576                 channel = simple_strtoul(p, NULL, 0);
7577                 if (channel)
7578                         params.channel = channel;
7579
7580                 p = buffer;
7581                 while (*p && *p != ' ')
7582                         p++;
7583                 if (*p)
7584                         type = simple_strtoul(p + 1, NULL, 0);
7585         }
7586
7587         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7588                        "channel %d (for '%s')\n", type, params.channel, buf);
7589         iwl3945_get_measurement(priv, &params, type);
7590
7591         return count;
7592 }
7593
7594 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7595                    show_measurement, store_measurement);
7596 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7597
7598 static ssize_t store_retry_rate(struct device *d,
7599                                 struct device_attribute *attr,
7600                                 const char *buf, size_t count)
7601 {
7602         struct iwl3945_priv *priv = dev_get_drvdata(d);
7603
7604         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7605         if (priv->retry_rate <= 0)
7606                 priv->retry_rate = 1;
7607
7608         return count;
7609 }
7610
7611 static ssize_t show_retry_rate(struct device *d,
7612                                struct device_attribute *attr, char *buf)
7613 {
7614         struct iwl3945_priv *priv = dev_get_drvdata(d);
7615         return sprintf(buf, "%d", priv->retry_rate);
7616 }
7617
7618 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7619                    store_retry_rate);
7620
7621 static ssize_t store_power_level(struct device *d,
7622                                  struct device_attribute *attr,
7623                                  const char *buf, size_t count)
7624 {
7625         struct iwl3945_priv *priv = dev_get_drvdata(d);
7626         int rc;
7627         int mode;
7628
7629         mode = simple_strtoul(buf, NULL, 0);
7630         mutex_lock(&priv->mutex);
7631
7632         if (!iwl3945_is_ready(priv)) {
7633                 rc = -EAGAIN;
7634                 goto out;
7635         }
7636
7637         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7638                 mode = IWL_POWER_AC;
7639         else
7640                 mode |= IWL_POWER_ENABLED;
7641
7642         if (mode != priv->power_mode) {
7643                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7644                 if (rc) {
7645                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7646                         goto out;
7647                 }
7648                 priv->power_mode = mode;
7649         }
7650
7651         rc = count;
7652
7653  out:
7654         mutex_unlock(&priv->mutex);
7655         return rc;
7656 }
7657
7658 #define MAX_WX_STRING 80
7659
7660 /* Values are in microsecond */
7661 static const s32 timeout_duration[] = {
7662         350000,
7663         250000,
7664         75000,
7665         37000,
7666         25000,
7667 };
7668 static const s32 period_duration[] = {
7669         400000,
7670         700000,
7671         1000000,
7672         1000000,
7673         1000000
7674 };
7675
7676 static ssize_t show_power_level(struct device *d,
7677                                 struct device_attribute *attr, char *buf)
7678 {
7679         struct iwl3945_priv *priv = dev_get_drvdata(d);
7680         int level = IWL_POWER_LEVEL(priv->power_mode);
7681         char *p = buf;
7682
7683         p += sprintf(p, "%d ", level);
7684         switch (level) {
7685         case IWL_POWER_MODE_CAM:
7686         case IWL_POWER_AC:
7687                 p += sprintf(p, "(AC)");
7688                 break;
7689         case IWL_POWER_BATTERY:
7690                 p += sprintf(p, "(BATTERY)");
7691                 break;
7692         default:
7693                 p += sprintf(p,
7694                              "(Timeout %dms, Period %dms)",
7695                              timeout_duration[level - 1] / 1000,
7696                              period_duration[level - 1] / 1000);
7697         }
7698
7699         if (!(priv->power_mode & IWL_POWER_ENABLED))
7700                 p += sprintf(p, " OFF\n");
7701         else
7702                 p += sprintf(p, " \n");
7703
7704         return (p - buf + 1);
7705
7706 }
7707
7708 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7709                    store_power_level);
7710
7711 static ssize_t show_channels(struct device *d,
7712                              struct device_attribute *attr, char *buf)
7713 {
7714         /* all this shit doesn't belong into sysfs anyway */
7715         return 0;
7716 }
7717
7718 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7719
7720 static ssize_t show_statistics(struct device *d,
7721                                struct device_attribute *attr, char *buf)
7722 {
7723         struct iwl3945_priv *priv = dev_get_drvdata(d);
7724         u32 size = sizeof(struct iwl3945_notif_statistics);
7725         u32 len = 0, ofs = 0;
7726         u8 *data = (u8 *) & priv->statistics;
7727         int rc = 0;
7728
7729         if (!iwl3945_is_alive(priv))
7730                 return -EAGAIN;
7731
7732         mutex_lock(&priv->mutex);
7733         rc = iwl3945_send_statistics_request(priv);
7734         mutex_unlock(&priv->mutex);
7735
7736         if (rc) {
7737                 len = sprintf(buf,
7738                               "Error sending statistics request: 0x%08X\n", rc);
7739                 return len;
7740         }
7741
7742         while (size && (PAGE_SIZE - len)) {
7743                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7744                                    PAGE_SIZE - len, 1);
7745                 len = strlen(buf);
7746                 if (PAGE_SIZE - len)
7747                         buf[len++] = '\n';
7748
7749                 ofs += 16;
7750                 size -= min(size, 16U);
7751         }
7752
7753         return len;
7754 }
7755
7756 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7757
7758 static ssize_t show_antenna(struct device *d,
7759                             struct device_attribute *attr, char *buf)
7760 {
7761         struct iwl3945_priv *priv = dev_get_drvdata(d);
7762
7763         if (!iwl3945_is_alive(priv))
7764                 return -EAGAIN;
7765
7766         return sprintf(buf, "%d\n", priv->antenna);
7767 }
7768
7769 static ssize_t store_antenna(struct device *d,
7770                              struct device_attribute *attr,
7771                              const char *buf, size_t count)
7772 {
7773         int ant;
7774         struct iwl3945_priv *priv = dev_get_drvdata(d);
7775
7776         if (count == 0)
7777                 return 0;
7778
7779         if (sscanf(buf, "%1i", &ant) != 1) {
7780                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7781                 return count;
7782         }
7783
7784         if ((ant >= 0) && (ant <= 2)) {
7785                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7786                 priv->antenna = (enum iwl3945_antenna)ant;
7787         } else
7788                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7789
7790
7791         return count;
7792 }
7793
7794 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7795
7796 static ssize_t show_status(struct device *d,
7797                            struct device_attribute *attr, char *buf)
7798 {
7799         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7800         if (!iwl3945_is_alive(priv))
7801                 return -EAGAIN;
7802         return sprintf(buf, "0x%08x\n", (int)priv->status);
7803 }
7804
7805 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7806
7807 static ssize_t dump_error_log(struct device *d,
7808                               struct device_attribute *attr,
7809                               const char *buf, size_t count)
7810 {
7811         char *p = (char *)buf;
7812
7813         if (p[0] == '1')
7814                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7815
7816         return strnlen(buf, count);
7817 }
7818
7819 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7820
7821 static ssize_t dump_event_log(struct device *d,
7822                               struct device_attribute *attr,
7823                               const char *buf, size_t count)
7824 {
7825         char *p = (char *)buf;
7826
7827         if (p[0] == '1')
7828                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7829
7830         return strnlen(buf, count);
7831 }
7832
7833 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7834
7835 /*****************************************************************************
7836  *
7837  * driver setup and teardown
7838  *
7839  *****************************************************************************/
7840
7841 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7842 {
7843         priv->workqueue = create_workqueue(DRV_NAME);
7844
7845         init_waitqueue_head(&priv->wait_command_queue);
7846
7847         INIT_WORK(&priv->up, iwl3945_bg_up);
7848         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7849         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7850         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7851         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7852         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7853         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7854         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7855         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
7856         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7857         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7858         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7859
7860         iwl3945_hw_setup_deferred_work(priv);
7861
7862         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7863                      iwl3945_irq_tasklet, (unsigned long)priv);
7864 }
7865
7866 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7867 {
7868         iwl3945_hw_cancel_deferred_work(priv);
7869
7870         cancel_delayed_work_sync(&priv->init_alive_start);
7871         cancel_delayed_work(&priv->scan_check);
7872         cancel_delayed_work(&priv->alive_start);
7873         cancel_delayed_work(&priv->post_associate);
7874         cancel_work_sync(&priv->beacon_update);
7875 }
7876
7877 static struct attribute *iwl3945_sysfs_entries[] = {
7878         &dev_attr_antenna.attr,
7879         &dev_attr_channels.attr,
7880         &dev_attr_dump_errors.attr,
7881         &dev_attr_dump_events.attr,
7882         &dev_attr_flags.attr,
7883         &dev_attr_filter_flags.attr,
7884 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7885         &dev_attr_measurement.attr,
7886 #endif
7887         &dev_attr_power_level.attr,
7888         &dev_attr_retry_rate.attr,
7889         &dev_attr_rf_kill.attr,
7890         &dev_attr_rs_window.attr,
7891         &dev_attr_statistics.attr,
7892         &dev_attr_status.attr,
7893         &dev_attr_temperature.attr,
7894         &dev_attr_tx_power.attr,
7895
7896         NULL
7897 };
7898
7899 static struct attribute_group iwl3945_attribute_group = {
7900         .name = NULL,           /* put in device directory */
7901         .attrs = iwl3945_sysfs_entries,
7902 };
7903
7904 static struct ieee80211_ops iwl3945_hw_ops = {
7905         .tx = iwl3945_mac_tx,
7906         .start = iwl3945_mac_start,
7907         .stop = iwl3945_mac_stop,
7908         .add_interface = iwl3945_mac_add_interface,
7909         .remove_interface = iwl3945_mac_remove_interface,
7910         .config = iwl3945_mac_config,
7911         .config_interface = iwl3945_mac_config_interface,
7912         .configure_filter = iwl3945_configure_filter,
7913         .set_key = iwl3945_mac_set_key,
7914         .get_stats = iwl3945_mac_get_stats,
7915         .get_tx_stats = iwl3945_mac_get_tx_stats,
7916         .conf_tx = iwl3945_mac_conf_tx,
7917         .get_tsf = iwl3945_mac_get_tsf,
7918         .reset_tsf = iwl3945_mac_reset_tsf,
7919         .beacon_update = iwl3945_mac_beacon_update,
7920         .hw_scan = iwl3945_mac_hw_scan
7921 };
7922
7923 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7924 {
7925         int err = 0;
7926         struct iwl3945_priv *priv;
7927         struct ieee80211_hw *hw;
7928         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7929         int i;
7930         DECLARE_MAC_BUF(mac);
7931
7932         /* Disabling hardware scan means that mac80211 will perform scans
7933          * "the hard way", rather than using device's scan. */
7934         if (iwl3945_param_disable_hw_scan) {
7935                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7936                 iwl3945_hw_ops.hw_scan = NULL;
7937         }
7938
7939         if ((iwl3945_param_queues_num > IWL_MAX_NUM_QUEUES) ||
7940             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7941                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7942                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
7943                 err = -EINVAL;
7944                 goto out;
7945         }
7946
7947         /* mac80211 allocates memory for this device instance, including
7948          *   space for this driver's private structure */
7949         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7950         if (hw == NULL) {
7951                 IWL_ERROR("Can not allocate network device\n");
7952                 err = -ENOMEM;
7953                 goto out;
7954         }
7955         SET_IEEE80211_DEV(hw, &pdev->dev);
7956
7957         hw->rate_control_algorithm = "iwl-3945-rs";
7958
7959         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7960         priv = hw->priv;
7961         priv->hw = hw;
7962
7963         priv->pci_dev = pdev;
7964         priv->cfg = cfg;
7965
7966         /* Select antenna (may be helpful if only one antenna is connected) */
7967         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7968 #ifdef CONFIG_IWL3945_DEBUG
7969         iwl3945_debug_level = iwl3945_param_debug;
7970         atomic_set(&priv->restrict_refcnt, 0);
7971 #endif
7972         priv->retry_rate = 1;
7973
7974         priv->ibss_beacon = NULL;
7975
7976         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
7977          *   the range of signal quality values that we'll provide.
7978          * Negative values for level/noise indicate that we'll provide dBm.
7979          * For WE, at least, non-0 values here *enable* display of values
7980          *   in app (iwconfig). */
7981         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
7982         hw->max_noise = -20;    /* noise level, negative indicates dBm */
7983         hw->max_signal = 100;   /* link quality indication (%) */
7984
7985         /* Tell mac80211 our Tx characteristics */
7986         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
7987
7988         /* 4 EDCA QOS priorities */
7989         hw->queues = 4;
7990
7991         spin_lock_init(&priv->lock);
7992         spin_lock_init(&priv->power_data.lock);
7993         spin_lock_init(&priv->sta_lock);
7994         spin_lock_init(&priv->hcmd_lock);
7995
7996         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
7997                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
7998
7999         INIT_LIST_HEAD(&priv->free_frames);
8000
8001         mutex_init(&priv->mutex);
8002         if (pci_enable_device(pdev)) {
8003                 err = -ENODEV;
8004                 goto out_ieee80211_free_hw;
8005         }
8006
8007         pci_set_master(pdev);
8008
8009         /* Clear the driver's (not device's) station table */
8010         iwl3945_clear_stations_table(priv);
8011
8012         priv->data_retry_limit = -1;
8013         priv->ieee_channels = NULL;
8014         priv->ieee_rates = NULL;
8015         priv->band = IEEE80211_BAND_2GHZ;
8016
8017         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8018         if (!err)
8019                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8020         if (err) {
8021                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8022                 goto out_pci_disable_device;
8023         }
8024
8025         pci_set_drvdata(pdev, priv);
8026         err = pci_request_regions(pdev, DRV_NAME);
8027         if (err)
8028                 goto out_pci_disable_device;
8029
8030         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8031          * PCI Tx retries from interfering with C3 CPU state */
8032         pci_write_config_byte(pdev, 0x41, 0x00);
8033
8034         priv->hw_base = pci_iomap(pdev, 0, 0);
8035         if (!priv->hw_base) {
8036                 err = -ENODEV;
8037                 goto out_pci_release_regions;
8038         }
8039
8040         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8041                         (unsigned long long) pci_resource_len(pdev, 0));
8042         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8043
8044         /* Initialize module parameter values here */
8045
8046         /* Disable radio (SW RF KILL) via parameter when loading driver */
8047         if (iwl3945_param_disable) {
8048                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8049                 IWL_DEBUG_INFO("Radio disabled.\n");
8050         }
8051
8052         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8053
8054         printk(KERN_INFO DRV_NAME
8055                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8056
8057         /* Device-specific setup */
8058         if (iwl3945_hw_set_hw_setting(priv)) {
8059                 IWL_ERROR("failed to set hw settings\n");
8060                 goto out_iounmap;
8061         }
8062
8063         if (iwl3945_param_qos_enable)
8064                 priv->qos_data.qos_enable = 1;
8065
8066         iwl3945_reset_qos(priv);
8067
8068         priv->qos_data.qos_active = 0;
8069         priv->qos_data.qos_cap.val = 0;
8070
8071         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8072         iwl3945_setup_deferred_work(priv);
8073         iwl3945_setup_rx_handlers(priv);
8074
8075         priv->rates_mask = IWL_RATES_MASK;
8076         /* If power management is turned on, default to AC mode */
8077         priv->power_mode = IWL_POWER_AC;
8078         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8079
8080         iwl3945_disable_interrupts(priv);
8081
8082         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8083         if (err) {
8084                 IWL_ERROR("failed to create sysfs device attributes\n");
8085                 goto out_release_irq;
8086         }
8087
8088         /* nic init */
8089         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8090                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8091
8092         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8093         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8094                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8095                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8096         if (err < 0) {
8097                 IWL_DEBUG_INFO("Failed to init the card\n");
8098                 goto out_remove_sysfs;
8099         }
8100         /* Read the EEPROM */
8101         err = iwl3945_eeprom_init(priv);
8102         if (err) {
8103                 IWL_ERROR("Unable to init EEPROM\n");
8104                 goto out_remove_sysfs;
8105         }
8106         /* MAC Address location in EEPROM same for 3945/4965 */
8107         get_eeprom_mac(priv, priv->mac_addr);
8108         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8109         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8110
8111         err = iwl3945_init_channel_map(priv);
8112         if (err) {
8113                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8114                 goto out_remove_sysfs;
8115         }
8116
8117         err = iwl3945_init_geos(priv);
8118         if (err) {
8119                 IWL_ERROR("initializing geos failed: %d\n", err);
8120                 goto out_free_channel_map;
8121         }
8122
8123         iwl3945_rate_control_register(priv->hw);
8124         err = ieee80211_register_hw(priv->hw);
8125         if (err) {
8126                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8127                 goto out_free_geos;
8128         }
8129
8130         priv->hw->conf.beacon_int = 100;
8131         priv->mac80211_registered = 1;
8132         pci_save_state(pdev);
8133         pci_disable_device(pdev);
8134
8135         return 0;
8136
8137  out_free_geos:
8138         iwl3945_free_geos(priv);
8139  out_free_channel_map:
8140         iwl3945_free_channel_map(priv);
8141  out_remove_sysfs:
8142         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8143
8144  out_release_irq:
8145         destroy_workqueue(priv->workqueue);
8146         priv->workqueue = NULL;
8147         iwl3945_unset_hw_setting(priv);
8148
8149  out_iounmap:
8150         pci_iounmap(pdev, priv->hw_base);
8151  out_pci_release_regions:
8152         pci_release_regions(pdev);
8153  out_pci_disable_device:
8154         pci_disable_device(pdev);
8155         pci_set_drvdata(pdev, NULL);
8156  out_ieee80211_free_hw:
8157         ieee80211_free_hw(priv->hw);
8158  out:
8159         return err;
8160 }
8161
8162 static void iwl3945_pci_remove(struct pci_dev *pdev)
8163 {
8164         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8165         struct list_head *p, *q;
8166         int i;
8167
8168         if (!priv)
8169                 return;
8170
8171         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8172
8173         set_bit(STATUS_EXIT_PENDING, &priv->status);
8174
8175         iwl3945_down(priv);
8176
8177         /* Free MAC hash list for ADHOC */
8178         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8179                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8180                         list_del(p);
8181                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8182                 }
8183         }
8184
8185         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8186
8187         iwl3945_dealloc_ucode_pci(priv);
8188
8189         if (priv->rxq.bd)
8190                 iwl3945_rx_queue_free(priv, &priv->rxq);
8191         iwl3945_hw_txq_ctx_free(priv);
8192
8193         iwl3945_unset_hw_setting(priv);
8194         iwl3945_clear_stations_table(priv);
8195
8196         if (priv->mac80211_registered) {
8197                 ieee80211_unregister_hw(priv->hw);
8198                 iwl3945_rate_control_unregister(priv->hw);
8199         }
8200
8201         /*netif_stop_queue(dev); */
8202         flush_workqueue(priv->workqueue);
8203
8204         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8205          * priv->workqueue... so we can't take down the workqueue
8206          * until now... */
8207         destroy_workqueue(priv->workqueue);
8208         priv->workqueue = NULL;
8209
8210         pci_iounmap(pdev, priv->hw_base);
8211         pci_release_regions(pdev);
8212         pci_disable_device(pdev);
8213         pci_set_drvdata(pdev, NULL);
8214
8215         iwl3945_free_channel_map(priv);
8216         iwl3945_free_geos(priv);
8217
8218         if (priv->ibss_beacon)
8219                 dev_kfree_skb(priv->ibss_beacon);
8220
8221         ieee80211_free_hw(priv->hw);
8222 }
8223
8224 #ifdef CONFIG_PM
8225
8226 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8227 {
8228         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8229
8230         if (priv->is_open) {
8231                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8232                 iwl3945_mac_stop(priv->hw);
8233                 priv->is_open = 1;
8234         }
8235
8236         pci_set_power_state(pdev, PCI_D3hot);
8237
8238         return 0;
8239 }
8240
8241 static int iwl3945_pci_resume(struct pci_dev *pdev)
8242 {
8243         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8244
8245         pci_set_power_state(pdev, PCI_D0);
8246
8247         if (priv->is_open)
8248                 iwl3945_mac_start(priv->hw);
8249
8250         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8251         return 0;
8252 }
8253
8254 #endif /* CONFIG_PM */
8255
8256 /*****************************************************************************
8257  *
8258  * driver and module entry point
8259  *
8260  *****************************************************************************/
8261
8262 static struct pci_driver iwl3945_driver = {
8263         .name = DRV_NAME,
8264         .id_table = iwl3945_hw_card_ids,
8265         .probe = iwl3945_pci_probe,
8266         .remove = __devexit_p(iwl3945_pci_remove),
8267 #ifdef CONFIG_PM
8268         .suspend = iwl3945_pci_suspend,
8269         .resume = iwl3945_pci_resume,
8270 #endif
8271 };
8272
8273 static int __init iwl3945_init(void)
8274 {
8275
8276         int ret;
8277         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8278         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8279         ret = pci_register_driver(&iwl3945_driver);
8280         if (ret) {
8281                 IWL_ERROR("Unable to initialize PCI module\n");
8282                 return ret;
8283         }
8284 #ifdef CONFIG_IWL3945_DEBUG
8285         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8286         if (ret) {
8287                 IWL_ERROR("Unable to create driver sysfs file\n");
8288                 pci_unregister_driver(&iwl3945_driver);
8289                 return ret;
8290         }
8291 #endif
8292
8293         return ret;
8294 }
8295
8296 static void __exit iwl3945_exit(void)
8297 {
8298 #ifdef CONFIG_IWL3945_DEBUG
8299         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8300 #endif
8301         pci_unregister_driver(&iwl3945_driver);
8302 }
8303
8304 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8305 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8306 module_param_named(disable, iwl3945_param_disable, int, 0444);
8307 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8308 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8309 MODULE_PARM_DESC(hwcrypto,
8310                  "using hardware crypto engine (default 0 [software])\n");
8311 module_param_named(debug, iwl3945_param_debug, int, 0444);
8312 MODULE_PARM_DESC(debug, "debug output mask");
8313 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8314 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8315
8316 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8317 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8318
8319 /* QoS */
8320 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8321 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8322
8323 module_exit(iwl3945_exit);
8324 module_init(iwl3945_init);