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/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-3945-core.h"
  49 #include "iwl-3945.h"
  50 #include "iwl-helpers.h"
  51
  52 #ifdef CONFIG_IWL3945_DEBUG
  53 u32 iwl3945_debug_level;
  54 #endif
  55
  56 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  57                                   struct iwl3945_tx_queue *txq);
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /* module parameters */
  66 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  67 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  68 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  69 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  70 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  71 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  72 int iwl3945_param_queues_num = IWL39_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION \
  80 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  81
  82 #ifdef CONFIG_IWL3945_DEBUG
  83 #define VD "d"
  84 #else
  85 #define VD
  86 #endif
  87
  88 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  89 #define VS "s"
  90 #else
  91 #define VS
  92 #endif
  93
  94 #define IWLWIFI_VERSION "1.2.26k" VD VS
  95 #define DRV_COPYRIGHT   "Copyright(c) 2003-2008 Intel Corporation"
  96 #define DRV_VERSION     IWLWIFI_VERSION
  97
  98
  99 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 100 MODULE_VERSION(DRV_VERSION);
 101 MODULE_AUTHOR(DRV_COPYRIGHT);
 102 MODULE_LICENSE("GPL");
 103
 104 static const struct ieee80211_supported_band *iwl3945_get_band(
 105                 struct iwl3945_priv *priv, enum ieee80211_band band)
 106 {
 107         return priv->hw->wiphy->bands[band];
 108 }
 109
 110 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 111 {
 112         /* Single white space is for Linksys APs */
 113         if (essid_len == 1 && essid[0] == ' ')
 114                 return 1;
 115
 116         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 117         while (essid_len) {
 118                 essid_len--;
 119                 if (essid[essid_len] != '\0')
 120                         return 0;
 121         }
 122
 123         return 1;
 124 }
 125
 126 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 127 {
 128         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 129         const char *s = essid;
 130         char *d = escaped;
 131
 132         if (iwl3945_is_empty_essid(essid, essid_len)) {
 133                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 134                 return escaped;
 135         }
 136
 137         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 138         while (essid_len--) {
 139                 if (*s == '\0') {
 140                         *d++ = '\\';
 141                         *d++ = '0';
 142                         s++;
 143                 } else
 144                         *d++ = *s++;
 145         }
 146         *d = '\0';
 147         return escaped;
 148 }
 149
 150 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 151  * DMA services
 152  *
 153  * Theory of operation
 154  *
 155  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 156  * of buffer descriptors, each of which points to one or more data buffers for
 157  * the device to read from or fill.  Driver and device exchange status of each
 158  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 159  * entries in each circular buffer, to protect against confusing empty and full
 160  * queue states.
 161  *
 162  * The device reads or writes the data in the queues via the device's several
 163  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 164  *
 165  * For Tx queue, there are low mark and high mark limits. If, after queuing
 166  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 167  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 168  * Tx queue resumed.
 169  *
 170  * The 3945 operates with six queues:  One receive queue, one transmit queue
 171  * (#4) for sending commands to the device firmware, and four transmit queues
 172  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 173  ***************************************************/
 174
 175 int iwl3945_queue_space(const struct iwl3945_queue *q)
 176 {
 177         int s = q->read_ptr - q->write_ptr;
 178
 179         if (q->read_ptr > q->write_ptr)
 180                 s -= q->n_bd;
 181
 182         if (s <= 0)
 183                 s += q->n_window;
 184         /* keep some reserve to not confuse empty and full situations */
 185         s -= 2;
 186         if (s < 0)
 187                 s = 0;
 188         return s;
 189 }
 190
 191 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 192 {
 193         return q->write_ptr > q->read_ptr ?
 194                 (i >= q->read_ptr && i < q->write_ptr) :
 195                 !(i < q->read_ptr && i >= q->write_ptr);
 196 }
 197
 198
 199 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 200 {
 201         /* This is for scan command, the big buffer at end of command array */
 202         if (is_huge)
 203                 return q->n_window;     /* must be power of 2 */
 204
 205         /* Otherwise, use normal size buffers */
 206         return index & (q->n_window - 1);
 207 }
 208
 209 /**
 210  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 211  */
 212 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 213                           int count, int slots_num, u32 id)
 214 {
 215         q->n_bd = count;
 216         q->n_window = slots_num;
 217         q->id = id;
 218
 219         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 220          * and iwl_queue_dec_wrap are broken. */
 221         BUG_ON(!is_power_of_2(count));
 222
 223         /* slots_num must be power-of-two size, otherwise
 224          * get_cmd_index is broken. */
 225         BUG_ON(!is_power_of_2(slots_num));
 226
 227         q->low_mark = q->n_window / 4;
 228         if (q->low_mark < 4)
 229                 q->low_mark = 4;
 230
 231         q->high_mark = q->n_window / 8;
 232         if (q->high_mark < 2)
 233                 q->high_mark = 2;
 234
 235         q->write_ptr = q->read_ptr = 0;
 236
 237         return 0;
 238 }
 239
 240 /**
 241  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 242  */
 243 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 244                               struct iwl3945_tx_queue *txq, u32 id)
 245 {
 246         struct pci_dev *dev = priv->pci_dev;
 247
 248         /* Driver private data, only for Tx (not command) queues,
 249          * not shared with device. */
 250         if (id != IWL_CMD_QUEUE_NUM) {
 251                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 252                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 253                 if (!txq->txb) {
 254                         IWL_ERROR("kmalloc for auxiliary BD "
 255                                   "structures failed\n");
 256                         goto error;
 257                 }
 258         } else
 259                 txq->txb = NULL;
 260
 261         /* Circular buffer of transmit frame descriptors (TFDs),
 262          * shared with device */
 263         txq->bd = pci_alloc_consistent(dev,
 264                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 265                         &txq->q.dma_addr);
 266
 267         if (!txq->bd) {
 268                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 269                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 270                 goto error;
 271         }
 272         txq->q.id = id;
 273
 274         return 0;
 275
 276  error:
 277         kfree(txq->txb);
 278         txq->txb = NULL;
 279
 280         return -ENOMEM;
 281 }
 282
 283 /**
 284  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 285  */
 286 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 287                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 288 {
 289         struct pci_dev *dev = priv->pci_dev;
 290         int len;
 291         int rc = 0;
 292
 293         /*
 294          * Alloc buffer array for commands (Tx or other types of commands).
 295          * For the command queue (#4), allocate command space + one big
 296          * command for scan, since scan command is very huge; the system will
 297          * not have two scans at the same time, so only one is needed.
 298          * For data Tx queues (all other queues), no super-size command
 299          * space is needed.
 300          */
 301         len = sizeof(struct iwl3945_cmd) * slots_num;
 302         if (txq_id == IWL_CMD_QUEUE_NUM)
 303                 len +=  IWL_MAX_SCAN_SIZE;
 304         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 305         if (!txq->cmd)
 306                 return -ENOMEM;
 307
 308         /* Alloc driver data array and TFD circular buffer */
 309         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 310         if (rc) {
 311                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 312
 313                 return -ENOMEM;
 314         }
 315         txq->need_update = 0;
 316
 317         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 318          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 319         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 320
 321         /* Initialize queue high/low-water, head/tail indexes */
 322         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 323
 324         /* Tell device where to find queue, enable DMA channel. */
 325         iwl3945_hw_tx_queue_init(priv, txq);
 326
 327         return 0;
 328 }
 329
 330 /**
 331  * iwl3945_tx_queue_free - Deallocate DMA queue.
 332  * @txq: Transmit queue to deallocate.
 333  *
 334  * Empty queue by removing and destroying all BD's.
 335  * Free all buffers.
 336  * 0-fill, but do not free "txq" descriptor structure.
 337  */
 338 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 339 {
 340         struct iwl3945_queue *q = &txq->q;
 341         struct pci_dev *dev = priv->pci_dev;
 342         int len;
 343
 344         if (q->n_bd == 0)
 345                 return;
 346
 347         /* first, empty all BD's */
 348         for (; q->write_ptr != q->read_ptr;
 349              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 350                 iwl3945_hw_txq_free_tfd(priv, txq);
 351
 352         len = sizeof(struct iwl3945_cmd) * q->n_window;
 353         if (q->id == IWL_CMD_QUEUE_NUM)
 354                 len += IWL_MAX_SCAN_SIZE;
 355
 356         /* De-alloc array of command/tx buffers */
 357         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 358
 359         /* De-alloc circular buffer of TFDs */
 360         if (txq->q.n_bd)
 361                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 362                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 363
 364         /* De-alloc array of per-TFD driver data */
 365         kfree(txq->txb);
 366         txq->txb = NULL;
 367
 368         /* 0-fill queue descriptor structure */
 369         memset(txq, 0, sizeof(*txq));
 370 }
 371
 372 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 373
 374 /*************** STATION TABLE MANAGEMENT ****
 375  * mac80211 should be examined to determine if sta_info is duplicating
 376  * the functionality provided here
 377  */
 378
 379 /**************************************************************/
 380 #if 0 /* temporary disable till we add real remove station */
 381 /**
 382  * iwl3945_remove_station - Remove driver's knowledge of station.
 383  *
 384  * NOTE:  This does not remove station from device's station table.
 385  */
 386 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 387 {
 388         int index = IWL_INVALID_STATION;
 389         int i;
 390         unsigned long flags;
 391
 392         spin_lock_irqsave(&priv->sta_lock, flags);
 393
 394         if (is_ap)
 395                 index = IWL_AP_ID;
 396         else if (is_broadcast_ether_addr(addr))
 397                 index = priv->hw_setting.bcast_sta_id;
 398         else
 399                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 400                         if (priv->stations[i].used &&
 401                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 402                                                 addr)) {
 403                                 index = i;
 404                                 break;
 405                         }
 406
 407         if (unlikely(index == IWL_INVALID_STATION))
 408                 goto out;
 409
 410         if (priv->stations[index].used) {
 411                 priv->stations[index].used = 0;
 412                 priv->num_stations--;
 413         }
 414
 415         BUG_ON(priv->num_stations < 0);
 416
 417 out:
 418         spin_unlock_irqrestore(&priv->sta_lock, flags);
 419         return 0;
 420 }
 421 #endif
 422
 423 /**
 424  * iwl3945_clear_stations_table - Clear the driver's station table
 425  *
 426  * NOTE:  This does not clear or otherwise alter the device's station table.
 427  */
 428 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 429 {
 430         unsigned long flags;
 431
 432         spin_lock_irqsave(&priv->sta_lock, flags);
 433
 434         priv->num_stations = 0;
 435         memset(priv->stations, 0, sizeof(priv->stations));
 436
 437         spin_unlock_irqrestore(&priv->sta_lock, flags);
 438 }
 439
 440 /**
 441  * iwl3945_add_station - Add station to station tables in driver and device
 442  */
 443 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 444 {
 445         int i;
 446         int index = IWL_INVALID_STATION;
 447         struct iwl3945_station_entry *station;
 448         unsigned long flags_spin;
 449         DECLARE_MAC_BUF(mac);
 450         u8 rate;
 451
 452         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 453         if (is_ap)
 454                 index = IWL_AP_ID;
 455         else if (is_broadcast_ether_addr(addr))
 456                 index = priv->hw_setting.bcast_sta_id;
 457         else
 458                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 459                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 460                                                 addr)) {
 461                                 index = i;
 462                                 break;
 463                         }
 464
 465                         if (!priv->stations[i].used &&
 466                             index == IWL_INVALID_STATION)
 467                                 index = i;
 468                 }
 469
 470         /* These two conditions has the same outcome but keep them separate
 471           since they have different meaning */
 472         if (unlikely(index == IWL_INVALID_STATION)) {
 473                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 474                 return index;
 475         }
 476
 477         if (priv->stations[index].used &&
 478            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 479                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 480                 return index;
 481         }
 482
 483         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 484         station = &priv->stations[index];
 485         station->used = 1;
 486         priv->num_stations++;
 487
 488         /* Set up the REPLY_ADD_STA command to send to device */
 489         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 490         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 491         station->sta.mode = 0;
 492         station->sta.sta.sta_id = index;
 493         station->sta.station_flags = 0;
 494
 495         if (priv->band == IEEE80211_BAND_5GHZ)
 496                 rate = IWL_RATE_6M_PLCP;
 497         else
 498                 rate =  IWL_RATE_1M_PLCP;
 499
 500         /* Turn on both antennas for the station... */
 501         station->sta.rate_n_flags =
 502                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 503         station->current_rate.rate_n_flags =
 504                         le16_to_cpu(station->sta.rate_n_flags);
 505
 506         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 507
 508         /* Add station to device's station table */
 509         iwl3945_send_add_station(priv, &station->sta, flags);
 510         return index;
 511
 512 }
 513
 514 /*************** DRIVER STATUS FUNCTIONS   *****/
 515
 516 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 517 {
 518         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 519          * set but EXIT_PENDING is not */
 520         return test_bit(STATUS_READY, &priv->status) &&
 521                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 522                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 523 }
 524
 525 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 526 {
 527         return test_bit(STATUS_ALIVE, &priv->status);
 528 }
 529
 530 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 531 {
 532         return test_bit(STATUS_INIT, &priv->status);
 533 }
 534
 535 static inline int iwl3945_is_rfkill_sw(struct iwl3945_priv *priv)
 536 {
 537         return test_bit(STATUS_RF_KILL_SW, &priv->status);
 538 }
 539
 540 static inline int iwl3945_is_rfkill_hw(struct iwl3945_priv *priv)
 541 {
 542         return test_bit(STATUS_RF_KILL_HW, &priv->status);
 543 }
 544
 545 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 546 {
 547         return iwl3945_is_rfkill_hw(priv) ||
 548                 iwl3945_is_rfkill_sw(priv);
 549 }
 550
 551 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 552 {
 553
 554         if (iwl3945_is_rfkill(priv))
 555                 return 0;
 556
 557         return iwl3945_is_ready(priv);
 558 }
 559
 560 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 561
 562 #define IWL_CMD(x) case x : return #x
 563
 564 static const char *get_cmd_string(u8 cmd)
 565 {
 566         switch (cmd) {
 567                 IWL_CMD(REPLY_ALIVE);
 568                 IWL_CMD(REPLY_ERROR);
 569                 IWL_CMD(REPLY_RXON);
 570                 IWL_CMD(REPLY_RXON_ASSOC);
 571                 IWL_CMD(REPLY_QOS_PARAM);
 572                 IWL_CMD(REPLY_RXON_TIMING);
 573                 IWL_CMD(REPLY_ADD_STA);
 574                 IWL_CMD(REPLY_REMOVE_STA);
 575                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 576                 IWL_CMD(REPLY_3945_RX);
 577                 IWL_CMD(REPLY_TX);
 578                 IWL_CMD(REPLY_RATE_SCALE);
 579                 IWL_CMD(REPLY_LEDS_CMD);
 580                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 581                 IWL_CMD(RADAR_NOTIFICATION);
 582                 IWL_CMD(REPLY_QUIET_CMD);
 583                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 584                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 585                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 586                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 587                 IWL_CMD(POWER_TABLE_CMD);
 588                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 589                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 590                 IWL_CMD(REPLY_SCAN_CMD);
 591                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 592                 IWL_CMD(SCAN_START_NOTIFICATION);
 593                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 594                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 595                 IWL_CMD(BEACON_NOTIFICATION);
 596                 IWL_CMD(REPLY_TX_BEACON);
 597                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 598                 IWL_CMD(QUIET_NOTIFICATION);
 599                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 600                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 601                 IWL_CMD(REPLY_BT_CONFIG);
 602                 IWL_CMD(REPLY_STATISTICS_CMD);
 603                 IWL_CMD(STATISTICS_NOTIFICATION);
 604                 IWL_CMD(REPLY_CARD_STATE_CMD);
 605                 IWL_CMD(CARD_STATE_NOTIFICATION);
 606                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 607         default:
 608                 return "UNKNOWN";
 609
 610         }
 611 }
 612
 613 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 614
 615 /**
 616  * iwl3945_enqueue_hcmd - enqueue a uCode command
 617  * @priv: device private data point
 618  * @cmd: a point to the ucode command structure
 619  *
 620  * The function returns < 0 values to indicate the operation is
 621  * failed. On success, it turns the index (> 0) of command in the
 622  * command queue.
 623  */
 624 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 625 {
 626         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 627         struct iwl3945_queue *q = &txq->q;
 628         struct iwl3945_tfd_frame *tfd;
 629         u32 *control_flags;
 630         struct iwl3945_cmd *out_cmd;
 631         u32 idx;
 632         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 633         dma_addr_t phys_addr;
 634         int pad;
 635         u16 count;
 636         int ret;
 637         unsigned long flags;
 638
 639         /* If any of the command structures end up being larger than
 640          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 641          * we will need to increase the size of the TFD entries */
 642         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 643                !(cmd->meta.flags & CMD_SIZE_HUGE));
 644
 645
 646         if (iwl3945_is_rfkill(priv)) {
 647                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 648                 return -EIO;
 649         }
 650
 651         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 652                 IWL_ERROR("No space for Tx\n");
 653                 return -ENOSPC;
 654         }
 655
 656         spin_lock_irqsave(&priv->hcmd_lock, flags);
 657
 658         tfd = &txq->bd[q->write_ptr];
 659         memset(tfd, 0, sizeof(*tfd));
 660
 661         control_flags = (u32 *) tfd;
 662
 663         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 664         out_cmd = &txq->cmd[idx];
 665
 666         out_cmd->hdr.cmd = cmd->id;
 667         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 668         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 669
 670         /* At this point, the out_cmd now has all of the incoming cmd
 671          * information */
 672
 673         out_cmd->hdr.flags = 0;
 674         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 675                         INDEX_TO_SEQ(q->write_ptr));
 676         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 677                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 678
 679         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 680                         offsetof(struct iwl3945_cmd, hdr);
 681         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 682
 683         pad = U32_PAD(cmd->len);
 684         count = TFD_CTL_COUNT_GET(*control_flags);
 685         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 686
 687         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 688                      "%d bytes at %d[%d]:%d\n",
 689                      get_cmd_string(out_cmd->hdr.cmd),
 690                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 691                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 692
 693         txq->need_update = 1;
 694
 695         /* Increment and update queue's write index */
 696         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 697         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 698
 699         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 700         return ret ? ret : idx;
 701 }
 702
 703 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 704 {
 705         int ret;
 706
 707         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 708
 709         /* An asynchronous command can not expect an SKB to be set. */
 710         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 711
 712         /* An asynchronous command MUST have a callback. */
 713         BUG_ON(!cmd->meta.u.callback);
 714
 715         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 716                 return -EBUSY;
 717
 718         ret = iwl3945_enqueue_hcmd(priv, cmd);
 719         if (ret < 0) {
 720                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 721                           get_cmd_string(cmd->id), ret);
 722                 return ret;
 723         }
 724         return 0;
 725 }
 726
 727 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 728 {
 729         int cmd_idx;
 730         int ret;
 731
 732         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 733
 734          /* A synchronous command can not have a callback set. */
 735         BUG_ON(cmd->meta.u.callback != NULL);
 736
 737         if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
 738                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 739                           get_cmd_string(cmd->id));
 740                 ret = -EBUSY;
 741                 goto out;
 742         }
 743
 744         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 745
 746         if (cmd->meta.flags & CMD_WANT_SKB)
 747                 cmd->meta.source = &cmd->meta;
 748
 749         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 750         if (cmd_idx < 0) {
 751                 ret = cmd_idx;
 752                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 753                           get_cmd_string(cmd->id), ret);
 754                 goto out;
 755         }
 756
 757         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 758                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 759                         HOST_COMPLETE_TIMEOUT);
 760         if (!ret) {
 761                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 762                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 763                                   get_cmd_string(cmd->id),
 764                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 765
 766                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 767                         ret = -ETIMEDOUT;
 768                         goto cancel;
 769                 }
 770         }
 771
 772         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 773                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 774                                get_cmd_string(cmd->id));
 775                 ret = -ECANCELED;
 776                 goto fail;
 777         }
 778         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 779                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 780                                get_cmd_string(cmd->id));
 781                 ret = -EIO;
 782                 goto fail;
 783         }
 784         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 785                 IWL_ERROR("Error: Response NULL in '%s'\n",
 786                           get_cmd_string(cmd->id));
 787                 ret = -EIO;
 788                 goto out;
 789         }
 790
 791         ret = 0;
 792         goto out;
 793
 794 cancel:
 795         if (cmd->meta.flags & CMD_WANT_SKB) {
 796                 struct iwl3945_cmd *qcmd;
 797
 798                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 799                  * TX cmd queue. Otherwise in case the cmd comes
 800                  * in later, it will possibly set an invalid
 801                  * address (cmd->meta.source). */
 802                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 803                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 804         }
 805 fail:
 806         if (cmd->meta.u.skb) {
 807                 dev_kfree_skb_any(cmd->meta.u.skb);
 808                 cmd->meta.u.skb = NULL;
 809         }
 810 out:
 811         clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
 812         return ret;
 813 }
 814
 815 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 816 {
 817         if (cmd->meta.flags & CMD_ASYNC)
 818                 return iwl3945_send_cmd_async(priv, cmd);
 819
 820         return iwl3945_send_cmd_sync(priv, cmd);
 821 }
 822
 823 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 824 {
 825         struct iwl3945_host_cmd cmd = {
 826                 .id = id,
 827                 .len = len,
 828                 .data = data,
 829         };
 830
 831         return iwl3945_send_cmd_sync(priv, &cmd);
 832 }
 833
 834 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 835 {
 836         struct iwl3945_host_cmd cmd = {
 837                 .id = id,
 838                 .len = sizeof(val),
 839                 .data = &val,
 840         };
 841
 842         return iwl3945_send_cmd_sync(priv, &cmd);
 843 }
 844
 845 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 846 {
 847         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 848 }
 849
 850 /**
 851  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 852  * @band: 2.4 or 5 GHz band
 853  * @channel: Any channel valid for the requested band
 854
 855  * In addition to setting the staging RXON, priv->band is also set.
 856  *
 857  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 858  * in the staging RXON flag structure based on the band
 859  */
 860 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 861                                     enum ieee80211_band band,
 862                                     u16 channel)
 863 {
 864         if (!iwl3945_get_channel_info(priv, band, channel)) {
 865                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 866                                channel, band);
 867                 return -EINVAL;
 868         }
 869
 870         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 871             (priv->band == band))
 872                 return 0;
 873
 874         priv->staging_rxon.channel = cpu_to_le16(channel);
 875         if (band == IEEE80211_BAND_5GHZ)
 876                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 877         else
 878                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 879
 880         priv->band = band;
 881
 882         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 883
 884         return 0;
 885 }
 886
 887 /**
 888  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 889  *
 890  * NOTE:  This is really only useful during development and can eventually
 891  * be #ifdef'd out once the driver is stable and folks aren't actively
 892  * making changes
 893  */
 894 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 895 {
 896         int error = 0;
 897         int counter = 1;
 898
 899         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 900                 error |= le32_to_cpu(rxon->flags &
 901                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 902                                  RXON_FLG_RADAR_DETECT_MSK));
 903                 if (error)
 904                         IWL_WARNING("check 24G fields %d | %d\n",
 905                                     counter++, error);
 906         } else {
 907                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 908                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 909                 if (error)
 910                         IWL_WARNING("check 52 fields %d | %d\n",
 911                                     counter++, error);
 912                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 913                 if (error)
 914                         IWL_WARNING("check 52 CCK %d | %d\n",
 915                                     counter++, error);
 916         }
 917         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 918         if (error)
 919                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 920
 921         /* make sure basic rates 6Mbps and 1Mbps are supported */
 922         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 923                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 924         if (error)
 925                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 926
 927         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 928         if (error)
 929                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 930
 931         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 932                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 933         if (error)
 934                 IWL_WARNING("check CCK and short slot %d | %d\n",
 935                             counter++, error);
 936
 937         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 938                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 939         if (error)
 940                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 941                             counter++, error);
 942
 943         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 944                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 945         if (error)
 946                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 947                             counter++, error);
 948
 949         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 950                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 951                                 RXON_FLG_ANT_A_MSK)) == 0);
 952         if (error)
 953                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 954
 955         if (error)
 956                 IWL_WARNING("Tuning to channel %d\n",
 957                             le16_to_cpu(rxon->channel));
 958
 959         if (error) {
 960                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 961                 return -1;
 962         }
 963         return 0;
 964 }
 965
 966 /**
 967  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 968  * @priv: staging_rxon is compared to active_rxon
 969  *
 970  * If the RXON structure is changing enough to require a new tune,
 971  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 972  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 973  */
 974 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
 975 {
 976
 977         /* These items are only settable from the full RXON command */
 978         if (!(iwl3945_is_associated(priv)) ||
 979             compare_ether_addr(priv->staging_rxon.bssid_addr,
 980                                priv->active_rxon.bssid_addr) ||
 981             compare_ether_addr(priv->staging_rxon.node_addr,
 982                                priv->active_rxon.node_addr) ||
 983             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 984                                priv->active_rxon.wlap_bssid_addr) ||
 985             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 986             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 987             (priv->staging_rxon.air_propagation !=
 988              priv->active_rxon.air_propagation) ||
 989             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 990                 return 1;
 991
 992         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 993          * be updated with the RXON_ASSOC command -- however only some
 994          * flag transitions are allowed using RXON_ASSOC */
 995
 996         /* Check if we are not switching bands */
 997         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 998             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 999                 return 1;
1000
1001         /* Check if we are switching association toggle */
1002         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1003                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1004                 return 1;
1005
1006         return 0;
1007 }
1008
1009 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1010 {
1011         int rc = 0;
1012         struct iwl3945_rx_packet *res = NULL;
1013         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1014         struct iwl3945_host_cmd cmd = {
1015                 .id = REPLY_RXON_ASSOC,
1016                 .len = sizeof(rxon_assoc),
1017                 .meta.flags = CMD_WANT_SKB,
1018                 .data = &rxon_assoc,
1019         };
1020         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1021         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1022
1023         if ((rxon1->flags == rxon2->flags) &&
1024             (rxon1->filter_flags == rxon2->filter_flags) &&
1025             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1026             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1027                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1028                 return 0;
1029         }
1030
1031         rxon_assoc.flags = priv->staging_rxon.flags;
1032         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1033         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1034         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1035         rxon_assoc.reserved = 0;
1036
1037         rc = iwl3945_send_cmd_sync(priv, &cmd);
1038         if (rc)
1039                 return rc;
1040
1041         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1042         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1043                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1044                 rc = -EIO;
1045         }
1046
1047         priv->alloc_rxb_skb--;
1048         dev_kfree_skb_any(cmd.meta.u.skb);
1049
1050         return rc;
1051 }
1052
1053 /**
1054  * iwl3945_commit_rxon - commit staging_rxon to hardware
1055  *
1056  * The RXON command in staging_rxon is committed to the hardware and
1057  * the active_rxon structure is updated with the new data.  This
1058  * function correctly transitions out of the RXON_ASSOC_MSK state if
1059  * a HW tune is required based on the RXON structure changes.
1060  */
1061 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1062 {
1063         /* cast away the const for active_rxon in this function */
1064         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1065         int rc = 0;
1066         DECLARE_MAC_BUF(mac);
1067
1068         if (!iwl3945_is_alive(priv))
1069                 return -1;
1070
1071         /* always get timestamp with Rx frame */
1072         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1073
1074         /* select antenna */
1075         priv->staging_rxon.flags &=
1076             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1077         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1078
1079         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1080         if (rc) {
1081                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1082                 return -EINVAL;
1083         }
1084
1085         /* If we don't need to send a full RXON, we can use
1086          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1087          * and other flags for the current radio configuration. */
1088         if (!iwl3945_full_rxon_required(priv)) {
1089                 rc = iwl3945_send_rxon_assoc(priv);
1090                 if (rc) {
1091                         IWL_ERROR("Error setting RXON_ASSOC "
1092                                   "configuration (%d).\n", rc);
1093                         return rc;
1094                 }
1095
1096                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1097
1098                 return 0;
1099         }
1100
1101         /* If we are currently associated and the new config requires
1102          * an RXON_ASSOC and the new config wants the associated mask enabled,
1103          * we must clear the associated from the active configuration
1104          * before we apply the new config */
1105         if (iwl3945_is_associated(priv) &&
1106             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1107                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1108                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1109
1110                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1111                                       sizeof(struct iwl3945_rxon_cmd),
1112                                       &priv->active_rxon);
1113
1114                 /* If the mask clearing failed then we set
1115                  * active_rxon back to what it was previously */
1116                 if (rc) {
1117                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1118                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1119                                   "configuration (%d).\n", rc);
1120                         return rc;
1121                 }
1122         }
1123
1124         IWL_DEBUG_INFO("Sending RXON\n"
1125                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1126                        "* channel = %d\n"
1127                        "* bssid = %s\n",
1128                        ((priv->staging_rxon.filter_flags &
1129                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1130                        le16_to_cpu(priv->staging_rxon.channel),
1131                        print_mac(mac, priv->staging_rxon.bssid_addr));
1132
1133         /* Apply the new configuration */
1134         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1135                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1136         if (rc) {
1137                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1138                 return rc;
1139         }
1140
1141         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1142
1143         iwl3945_clear_stations_table(priv);
1144
1145         /* If we issue a new RXON command which required a tune then we must
1146          * send a new TXPOWER command or we won't be able to Tx any frames */
1147         rc = iwl3945_hw_reg_send_txpower(priv);
1148         if (rc) {
1149                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1150                 return rc;
1151         }
1152
1153         /* Add the broadcast address so we can send broadcast frames */
1154         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1155             IWL_INVALID_STATION) {
1156                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1157                 return -EIO;
1158         }
1159
1160         /* If we have set the ASSOC_MSK and we are in BSS mode then
1161          * add the IWL_AP_ID to the station rate table */
1162         if (iwl3945_is_associated(priv) &&
1163             (priv->iw_mode == NL80211_IFTYPE_STATION))
1164                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1165                     == IWL_INVALID_STATION) {
1166                         IWL_ERROR("Error adding AP address for transmit.\n");
1167                         return -EIO;
1168                 }
1169
1170         /* Init the hardware's rate fallback order based on the band */
1171         rc = iwl3945_init_hw_rate_table(priv);
1172         if (rc) {
1173                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1174                 return -EIO;
1175         }
1176
1177         return 0;
1178 }
1179
1180 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1181 {
1182         struct iwl3945_bt_cmd bt_cmd = {
1183                 .flags = 3,
1184                 .lead_time = 0xAA,
1185                 .max_kill = 1,
1186                 .kill_ack_mask = 0,
1187                 .kill_cts_mask = 0,
1188         };
1189
1190         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1191                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1192 }
1193
1194 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1195 {
1196         int rc = 0;
1197         struct iwl3945_rx_packet *res;
1198         struct iwl3945_host_cmd cmd = {
1199                 .id = REPLY_SCAN_ABORT_CMD,
1200                 .meta.flags = CMD_WANT_SKB,
1201         };
1202
1203         /* If there isn't a scan actively going on in the hardware
1204          * then we are in between scan bands and not actually
1205          * actively scanning, so don't send the abort command */
1206         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1207                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1208                 return 0;
1209         }
1210
1211         rc = iwl3945_send_cmd_sync(priv, &cmd);
1212         if (rc) {
1213                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1214                 return rc;
1215         }
1216
1217         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1218         if (res->u.status != CAN_ABORT_STATUS) {
1219                 /* The scan abort will return 1 for success or
1220                  * 2 for "failure".  A failure condition can be
1221                  * due to simply not being in an active scan which
1222                  * can occur if we send the scan abort before we
1223                  * the microcode has notified us that a scan is
1224                  * completed. */
1225                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1226                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1227                 clear_bit(STATUS_SCAN_HW, &priv->status);
1228         }
1229
1230         dev_kfree_skb_any(cmd.meta.u.skb);
1231
1232         return rc;
1233 }
1234
1235 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1236                                         struct iwl3945_cmd *cmd,
1237                                         struct sk_buff *skb)
1238 {
1239         return 1;
1240 }
1241
1242 /*
1243  * CARD_STATE_CMD
1244  *
1245  * Use: Sets the device's internal card state to enable, disable, or halt
1246  *
1247  * When in the 'enable' state the card operates as normal.
1248  * When in the 'disable' state, the card enters into a low power mode.
1249  * When in the 'halt' state, the card is shut down and must be fully
1250  * restarted to come back on.
1251  */
1252 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1253 {
1254         struct iwl3945_host_cmd cmd = {
1255                 .id = REPLY_CARD_STATE_CMD,
1256                 .len = sizeof(u32),
1257                 .data = &flags,
1258                 .meta.flags = meta_flag,
1259         };
1260
1261         if (meta_flag & CMD_ASYNC)
1262                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1263
1264         return iwl3945_send_cmd(priv, &cmd);
1265 }
1266
1267 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1268                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1269 {
1270         struct iwl3945_rx_packet *res = NULL;
1271
1272         if (!skb) {
1273                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1274                 return 1;
1275         }
1276
1277         res = (struct iwl3945_rx_packet *)skb->data;
1278         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1279                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1280                           res->hdr.flags);
1281                 return 1;
1282         }
1283
1284         switch (res->u.add_sta.status) {
1285         case ADD_STA_SUCCESS_MSK:
1286                 break;
1287         default:
1288                 break;
1289         }
1290
1291         /* We didn't cache the SKB; let the caller free it */
1292         return 1;
1293 }
1294
1295 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1296                          struct iwl3945_addsta_cmd *sta, u8 flags)
1297 {
1298         struct iwl3945_rx_packet *res = NULL;
1299         int rc = 0;
1300         struct iwl3945_host_cmd cmd = {
1301                 .id = REPLY_ADD_STA,
1302                 .len = sizeof(struct iwl3945_addsta_cmd),
1303                 .meta.flags = flags,
1304                 .data = sta,
1305         };
1306
1307         if (flags & CMD_ASYNC)
1308                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1309         else
1310                 cmd.meta.flags |= CMD_WANT_SKB;
1311
1312         rc = iwl3945_send_cmd(priv, &cmd);
1313
1314         if (rc || (flags & CMD_ASYNC))
1315                 return rc;
1316
1317         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1318         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1319                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1320                           res->hdr.flags);
1321                 rc = -EIO;
1322         }
1323
1324         if (rc == 0) {
1325                 switch (res->u.add_sta.status) {
1326                 case ADD_STA_SUCCESS_MSK:
1327                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1328                         break;
1329                 default:
1330                         rc = -EIO;
1331                         IWL_WARNING("REPLY_ADD_STA failed\n");
1332                         break;
1333                 }
1334         }
1335
1336         priv->alloc_rxb_skb--;
1337         dev_kfree_skb_any(cmd.meta.u.skb);
1338
1339         return rc;
1340 }
1341
1342 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1343                                    struct ieee80211_key_conf *keyconf,
1344                                    u8 sta_id)
1345 {
1346         unsigned long flags;
1347         __le16 key_flags = 0;
1348
1349         switch (keyconf->alg) {
1350         case ALG_CCMP:
1351                 key_flags |= STA_KEY_FLG_CCMP;
1352                 key_flags |= cpu_to_le16(
1353                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1354                 key_flags &= ~STA_KEY_FLG_INVALID;
1355                 break;
1356         case ALG_TKIP:
1357         case ALG_WEP:
1358         default:
1359                 return -EINVAL;
1360         }
1361         spin_lock_irqsave(&priv->sta_lock, flags);
1362         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1363         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1364         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1365                keyconf->keylen);
1366
1367         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1368                keyconf->keylen);
1369         priv->stations[sta_id].sta.key.key_flags = key_flags;
1370         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1371         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1372
1373         spin_unlock_irqrestore(&priv->sta_lock, flags);
1374
1375         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1376         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1377         return 0;
1378 }
1379
1380 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1381 {
1382         unsigned long flags;
1383
1384         spin_lock_irqsave(&priv->sta_lock, flags);
1385         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1386         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1387         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1388         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1389         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1390         spin_unlock_irqrestore(&priv->sta_lock, flags);
1391
1392         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1393         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1394         return 0;
1395 }
1396
1397 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1398 {
1399         struct list_head *element;
1400
1401         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1402                        priv->frames_count);
1403
1404         while (!list_empty(&priv->free_frames)) {
1405                 element = priv->free_frames.next;
1406                 list_del(element);
1407                 kfree(list_entry(element, struct iwl3945_frame, list));
1408                 priv->frames_count--;
1409         }
1410
1411         if (priv->frames_count) {
1412                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1413                             priv->frames_count);
1414                 priv->frames_count = 0;
1415         }
1416 }
1417
1418 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1419 {
1420         struct iwl3945_frame *frame;
1421         struct list_head *element;
1422         if (list_empty(&priv->free_frames)) {
1423                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1424                 if (!frame) {
1425                         IWL_ERROR("Could not allocate frame!\n");
1426                         return NULL;
1427                 }
1428
1429                 priv->frames_count++;
1430                 return frame;
1431         }
1432
1433         element = priv->free_frames.next;
1434         list_del(element);
1435         return list_entry(element, struct iwl3945_frame, list);
1436 }
1437
1438 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1439 {
1440         memset(frame, 0, sizeof(*frame));
1441         list_add(&frame->list, &priv->free_frames);
1442 }
1443
1444 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1445                                 struct ieee80211_hdr *hdr,
1446                                 const u8 *dest, int left)
1447 {
1448
1449         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1450             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
1451              (priv->iw_mode != NL80211_IFTYPE_AP)))
1452                 return 0;
1453
1454         if (priv->ibss_beacon->len > left)
1455                 return 0;
1456
1457         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1458
1459         return priv->ibss_beacon->len;
1460 }
1461
1462 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1463 {
1464         u8 i;
1465
1466         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1467              i = iwl3945_rates[i].next_ieee) {
1468                 if (rate_mask & (1 << i))
1469                         return iwl3945_rates[i].plcp;
1470         }
1471
1472         return IWL_RATE_INVALID;
1473 }
1474
1475 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1476 {
1477         struct iwl3945_frame *frame;
1478         unsigned int frame_size;
1479         int rc;
1480         u8 rate;
1481
1482         frame = iwl3945_get_free_frame(priv);
1483
1484         if (!frame) {
1485                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1486                           "command.\n");
1487                 return -ENOMEM;
1488         }
1489
1490         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1491                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1492                                                 0xFF0);
1493                 if (rate == IWL_INVALID_RATE)
1494                         rate = IWL_RATE_6M_PLCP;
1495         } else {
1496                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1497                 if (rate == IWL_INVALID_RATE)
1498                         rate = IWL_RATE_1M_PLCP;
1499         }
1500
1501         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1502
1503         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1504                               &frame->u.cmd[0]);
1505
1506         iwl3945_free_frame(priv, frame);
1507
1508         return rc;
1509 }
1510
1511 /******************************************************************************
1512  *
1513  * EEPROM related functions
1514  *
1515  ******************************************************************************/
1516
1517 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1518 {
1519         memcpy(mac, priv->eeprom.mac_address, 6);
1520 }
1521
1522 /*
1523  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1524  * embedded controller) as EEPROM reader; each read is a series of pulses
1525  * to/from the EEPROM chip, not a single event, so even reads could conflict
1526  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1527  * simply claims ownership, which should be safe when this function is called
1528  * (i.e. before loading uCode!).
1529  */
1530 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1531 {
1532         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1533         return 0;
1534 }
1535
1536 /**
1537  * iwl3945_eeprom_init - read EEPROM contents
1538  *
1539  * Load the EEPROM contents from adapter into priv->eeprom
1540  *
1541  * NOTE:  This routine uses the non-debug IO access functions.
1542  */
1543 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1544 {
1545         u16 *e = (u16 *)&priv->eeprom;
1546         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1547         u32 r;
1548         int sz = sizeof(priv->eeprom);
1549         int rc;
1550         int i;
1551         u16 addr;
1552
1553         /* The EEPROM structure has several padding buffers within it
1554          * and when adding new EEPROM maps is subject to programmer errors
1555          * which may be very difficult to identify without explicitly
1556          * checking the resulting size of the eeprom map. */
1557         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1558
1559         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1560                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
1561                 return -ENOENT;
1562         }
1563
1564         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1565         rc = iwl3945_eeprom_acquire_semaphore(priv);
1566         if (rc < 0) {
1567                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1568                 return -ENOENT;
1569         }
1570
1571         /* eeprom is an array of 16bit values */
1572         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1573                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1574                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1575
1576                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1577                                         i += IWL_EEPROM_ACCESS_DELAY) {
1578                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1579                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1580                                 break;
1581                         udelay(IWL_EEPROM_ACCESS_DELAY);
1582                 }
1583
1584                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1585                         IWL_ERROR("Time out reading EEPROM[%d]\n", addr);
1586                         return -ETIMEDOUT;
1587                 }
1588                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1589         }
1590
1591         return 0;
1592 }
1593
1594 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1595 {
1596         if (priv->hw_setting.shared_virt)
1597                 pci_free_consistent(priv->pci_dev,
1598                                     sizeof(struct iwl3945_shared),
1599                                     priv->hw_setting.shared_virt,
1600                                     priv->hw_setting.shared_phys);
1601 }
1602
1603 /**
1604  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1605  *
1606  * return : set the bit for each supported rate insert in ie
1607  */
1608 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1609                                     u16 basic_rate, int *left)
1610 {
1611         u16 ret_rates = 0, bit;
1612         int i;
1613         u8 *cnt = ie;
1614         u8 *rates = ie + 1;
1615
1616         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1617                 if (bit & supported_rate) {
1618                         ret_rates |= bit;
1619                         rates[*cnt] = iwl3945_rates[i].ieee |
1620                                 ((bit & basic_rate) ? 0x80 : 0x00);
1621                         (*cnt)++;
1622                         (*left)--;
1623                         if ((*left <= 0) ||
1624                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1625                                 break;
1626                 }
1627         }
1628
1629         return ret_rates;
1630 }
1631
1632 /**
1633  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1634  */
1635 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1636                               struct ieee80211_mgmt *frame,
1637                               int left, int is_direct)
1638 {
1639         int len = 0;
1640         u8 *pos = NULL;
1641         u16 active_rates, ret_rates, cck_rates;
1642
1643         /* Make sure there is enough space for the probe request,
1644          * two mandatory IEs and the data */
1645         left -= 24;
1646         if (left < 0)
1647                 return 0;
1648         len += 24;
1649
1650         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1651         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1652         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1653         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1654         frame->seq_ctrl = 0;
1655
1656         /* fill in our indirect SSID IE */
1657         /* ...next IE... */
1658
1659         left -= 2;
1660         if (left < 0)
1661                 return 0;
1662         len += 2;
1663         pos = &(frame->u.probe_req.variable[0]);
1664         *pos++ = WLAN_EID_SSID;
1665         *pos++ = 0;
1666
1667         /* fill in our direct SSID IE... */
1668         if (is_direct) {
1669                 /* ...next IE... */
1670                 left -= 2 + priv->essid_len;
1671                 if (left < 0)
1672                         return 0;
1673                 /* ... fill it in... */
1674                 *pos++ = WLAN_EID_SSID;
1675                 *pos++ = priv->essid_len;
1676                 memcpy(pos, priv->essid, priv->essid_len);
1677                 pos += priv->essid_len;
1678                 len += 2 + priv->essid_len;
1679         }
1680
1681         /* fill in supported rate */
1682         /* ...next IE... */
1683         left -= 2;
1684         if (left < 0)
1685                 return 0;
1686
1687         /* ... fill it in... */
1688         *pos++ = WLAN_EID_SUPP_RATES;
1689         *pos = 0;
1690
1691         priv->active_rate = priv->rates_mask;
1692         active_rates = priv->active_rate;
1693         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1694
1695         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1696         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1697                         priv->active_rate_basic, &left);
1698         active_rates &= ~ret_rates;
1699
1700         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1701                                  priv->active_rate_basic, &left);
1702         active_rates &= ~ret_rates;
1703
1704         len += 2 + *pos;
1705         pos += (*pos) + 1;
1706         if (active_rates == 0)
1707                 goto fill_end;
1708
1709         /* fill in supported extended rate */
1710         /* ...next IE... */
1711         left -= 2;
1712         if (left < 0)
1713                 return 0;
1714         /* ... fill it in... */
1715         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1716         *pos = 0;
1717         iwl3945_supported_rate_to_ie(pos, active_rates,
1718                                  priv->active_rate_basic, &left);
1719         if (*pos > 0)
1720                 len += 2 + *pos;
1721
1722  fill_end:
1723         return (u16)len;
1724 }
1725
1726 /*
1727  * QoS  support
1728 */
1729 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1730                                        struct iwl3945_qosparam_cmd *qos)
1731 {
1732
1733         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1734                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1735 }
1736
1737 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1738 {
1739         u16 cw_min = 15;
1740         u16 cw_max = 1023;
1741         u8 aifs = 2;
1742         u8 is_legacy = 0;
1743         unsigned long flags;
1744         int i;
1745
1746         spin_lock_irqsave(&priv->lock, flags);
1747         priv->qos_data.qos_active = 0;
1748
1749         if (priv->iw_mode == NL80211_IFTYPE_ADHOC) {
1750                 if (priv->qos_data.qos_enable)
1751                         priv->qos_data.qos_active = 1;
1752                 if (!(priv->active_rate & 0xfff0)) {
1753                         cw_min = 31;
1754                         is_legacy = 1;
1755                 }
1756         } else if (priv->iw_mode == NL80211_IFTYPE_AP) {
1757                 if (priv->qos_data.qos_enable)
1758                         priv->qos_data.qos_active = 1;
1759         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1760                 cw_min = 31;
1761                 is_legacy = 1;
1762         }
1763
1764         if (priv->qos_data.qos_active)
1765                 aifs = 3;
1766
1767         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1768         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1769         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1770         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1771         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1772
1773         if (priv->qos_data.qos_active) {
1774                 i = 1;
1775                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1776                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1777                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1778                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1779                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1780
1781                 i = 2;
1782                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1783                         cpu_to_le16((cw_min + 1) / 2 - 1);
1784                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1785                         cpu_to_le16(cw_max);
1786                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1787                 if (is_legacy)
1788                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1789                                 cpu_to_le16(6016);
1790                 else
1791                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1792                                 cpu_to_le16(3008);
1793                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1794
1795                 i = 3;
1796                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1797                         cpu_to_le16((cw_min + 1) / 4 - 1);
1798                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1799                         cpu_to_le16((cw_max + 1) / 2 - 1);
1800                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1801                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1802                 if (is_legacy)
1803                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1804                                 cpu_to_le16(3264);
1805                 else
1806                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1807                                 cpu_to_le16(1504);
1808         } else {
1809                 for (i = 1; i < 4; i++) {
1810                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1811                                 cpu_to_le16(cw_min);
1812                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1813                                 cpu_to_le16(cw_max);
1814                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1815                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1816                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1817                 }
1818         }
1819         IWL_DEBUG_QOS("set QoS to default \n");
1820
1821         spin_unlock_irqrestore(&priv->lock, flags);
1822 }
1823
1824 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
1825 {
1826         unsigned long flags;
1827
1828         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1829                 return;
1830
1831         if (!priv->qos_data.qos_enable)
1832                 return;
1833
1834         spin_lock_irqsave(&priv->lock, flags);
1835         priv->qos_data.def_qos_parm.qos_flags = 0;
1836
1837         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1838             !priv->qos_data.qos_cap.q_AP.txop_request)
1839                 priv->qos_data.def_qos_parm.qos_flags |=
1840                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1841
1842         if (priv->qos_data.qos_active)
1843                 priv->qos_data.def_qos_parm.qos_flags |=
1844                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1845
1846         spin_unlock_irqrestore(&priv->lock, flags);
1847
1848         if (force || iwl3945_is_associated(priv)) {
1849                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1850                               priv->qos_data.qos_active);
1851
1852                 iwl3945_send_qos_params_command(priv,
1853                                 &(priv->qos_data.def_qos_parm));
1854         }
1855 }
1856
1857 /*
1858  * Power management (not Tx power!) functions
1859  */
1860 #define MSEC_TO_USEC 1024
1861
1862 #define NOSLP __constant_cpu_to_le32(0)
1863 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
1864 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1865 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1866                                      __constant_cpu_to_le32(X1), \
1867                                      __constant_cpu_to_le32(X2), \
1868                                      __constant_cpu_to_le32(X3), \
1869                                      __constant_cpu_to_le32(X4)}
1870
1871
1872 /* default power management (not Tx power) table values */
1873 /* for tim  0-10 */
1874 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
1875         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1876         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1877         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1878         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1879         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1880         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1881 };
1882
1883 /* for tim > 10 */
1884 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
1885         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1886         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1887                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1888         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1889                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1890         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1891                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1892         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1893         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1894                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1895 };
1896
1897 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
1898 {
1899         int rc = 0, i;
1900         struct iwl3945_power_mgr *pow_data;
1901         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
1902         u16 pci_pm;
1903
1904         IWL_DEBUG_POWER("Initialize power \n");
1905
1906         pow_data = &(priv->power_data);
1907
1908         memset(pow_data, 0, sizeof(*pow_data));
1909
1910         pow_data->active_index = IWL_POWER_RANGE_0;
1911         pow_data->dtim_val = 0xffff;
1912
1913         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1914         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1915
1916         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1917         if (rc != 0)
1918                 return 0;
1919         else {
1920                 struct iwl3945_powertable_cmd *cmd;
1921
1922                 IWL_DEBUG_POWER("adjust power command flags\n");
1923
1924                 for (i = 0; i < IWL_POWER_AC; i++) {
1925                         cmd = &pow_data->pwr_range_0[i].cmd;
1926
1927                         if (pci_pm & 0x1)
1928                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1929                         else
1930                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1931                 }
1932         }
1933         return rc;
1934 }
1935
1936 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
1937                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
1938 {
1939         int rc = 0, i;
1940         u8 skip;
1941         u32 max_sleep = 0;
1942         struct iwl3945_power_vec_entry *range;
1943         u8 period = 0;
1944         struct iwl3945_power_mgr *pow_data;
1945
1946         if (mode > IWL_POWER_INDEX_5) {
1947                 IWL_DEBUG_POWER("Error invalid power mode \n");
1948                 return -1;
1949         }
1950         pow_data = &(priv->power_data);
1951
1952         if (pow_data->active_index == IWL_POWER_RANGE_0)
1953                 range = &pow_data->pwr_range_0[0];
1954         else
1955                 range = &pow_data->pwr_range_1[1];
1956
1957         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1958
1959 #ifdef IWL_MAC80211_DISABLE
1960         if (priv->assoc_network != NULL) {
1961                 unsigned long flags;
1962
1963                 period = priv->assoc_network->tim.tim_period;
1964         }
1965 #endif  /*IWL_MAC80211_DISABLE */
1966         skip = range[mode].no_dtim;
1967
1968         if (period == 0) {
1969                 period = 1;
1970                 skip = 0;
1971         }
1972
1973         if (skip == 0) {
1974                 max_sleep = period;
1975                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1976         } else {
1977                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1978                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1979                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1980         }
1981
1982         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1983                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1984                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1985         }
1986
1987         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1988         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1989         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1990         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1991                         le32_to_cpu(cmd->sleep_interval[0]),
1992                         le32_to_cpu(cmd->sleep_interval[1]),
1993                         le32_to_cpu(cmd->sleep_interval[2]),
1994                         le32_to_cpu(cmd->sleep_interval[3]),
1995                         le32_to_cpu(cmd->sleep_interval[4]));
1996
1997         return rc;
1998 }
1999
2000 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2001 {
2002         u32 uninitialized_var(final_mode);
2003         int rc;
2004         struct iwl3945_powertable_cmd cmd;
2005
2006         /* If on battery, set to 3,
2007          * if plugged into AC power, set to CAM ("continuously aware mode"),
2008          * else user level */
2009         switch (mode) {
2010         case IWL_POWER_BATTERY:
2011                 final_mode = IWL_POWER_INDEX_3;
2012                 break;
2013         case IWL_POWER_AC:
2014                 final_mode = IWL_POWER_MODE_CAM;
2015                 break;
2016         default:
2017                 final_mode = mode;
2018                 break;
2019         }
2020
2021         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2022
2023         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2024
2025         if (final_mode == IWL_POWER_MODE_CAM)
2026                 clear_bit(STATUS_POWER_PMI, &priv->status);
2027         else
2028                 set_bit(STATUS_POWER_PMI, &priv->status);
2029
2030         return rc;
2031 }
2032
2033 /**
2034  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2035  *
2036  * NOTE: priv->mutex is not required before calling this function
2037  */
2038 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2039 {
2040         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2041                 clear_bit(STATUS_SCANNING, &priv->status);
2042                 return 0;
2043         }
2044
2045         if (test_bit(STATUS_SCANNING, &priv->status)) {
2046                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2047                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2048                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2049                         queue_work(priv->workqueue, &priv->abort_scan);
2050
2051                 } else
2052                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2053
2054                 return test_bit(STATUS_SCANNING, &priv->status);
2055         }
2056
2057         return 0;
2058 }
2059
2060 /**
2061  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2062  * @ms: amount of time to wait (in milliseconds) for scan to abort
2063  *
2064  * NOTE: priv->mutex must be held before calling this function
2065  */
2066 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2067 {
2068         unsigned long now = jiffies;
2069         int ret;
2070
2071         ret = iwl3945_scan_cancel(priv);
2072         if (ret && ms) {
2073                 mutex_unlock(&priv->mutex);
2074                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2075                                 test_bit(STATUS_SCANNING, &priv->status))
2076                         msleep(1);
2077                 mutex_lock(&priv->mutex);
2078
2079                 return test_bit(STATUS_SCANNING, &priv->status);
2080         }
2081
2082         return ret;
2083 }
2084
2085 #define MAX_UCODE_BEACON_INTERVAL       1024
2086 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2087
2088 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2089 {
2090         u16 new_val = 0;
2091         u16 beacon_factor = 0;
2092
2093         beacon_factor =
2094             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2095                 / MAX_UCODE_BEACON_INTERVAL;
2096         new_val = beacon_val / beacon_factor;
2097
2098         return cpu_to_le16(new_val);
2099 }
2100
2101 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2102 {
2103         u64 interval_tm_unit;
2104         u64 tsf, result;
2105         unsigned long flags;
2106         struct ieee80211_conf *conf = NULL;
2107         u16 beacon_int = 0;
2108
2109         conf = ieee80211_get_hw_conf(priv->hw);
2110
2111         spin_lock_irqsave(&priv->lock, flags);
2112         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2113         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2114
2115         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2116
2117         tsf = priv->timestamp1;
2118         tsf = ((tsf << 32) | priv->timestamp0);
2119
2120         beacon_int = priv->beacon_int;
2121         spin_unlock_irqrestore(&priv->lock, flags);
2122
2123         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
2124                 if (beacon_int == 0) {
2125                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2126                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2127                 } else {
2128                         priv->rxon_timing.beacon_interval =
2129                                 cpu_to_le16(beacon_int);
2130                         priv->rxon_timing.beacon_interval =
2131                             iwl3945_adjust_beacon_interval(
2132                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2133                 }
2134
2135                 priv->rxon_timing.atim_window = 0;
2136         } else {
2137                 priv->rxon_timing.beacon_interval =
2138                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2139                 /* TODO: we need to get atim_window from upper stack
2140                  * for now we set to 0 */
2141                 priv->rxon_timing.atim_window = 0;
2142         }
2143
2144         interval_tm_unit =
2145                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2146         result = do_div(tsf, interval_tm_unit);
2147         priv->rxon_timing.beacon_init_val =
2148             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2149
2150         IWL_DEBUG_ASSOC
2151             ("beacon interval %d beacon timer %d beacon tim %d\n",
2152                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2153                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2154                 le16_to_cpu(priv->rxon_timing.atim_window));
2155 }
2156
2157 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2158 {
2159         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2160                 IWL_ERROR("APs don't scan.\n");
2161                 return 0;
2162         }
2163
2164         if (!iwl3945_is_ready_rf(priv)) {
2165                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2166                 return -EIO;
2167         }
2168
2169         if (test_bit(STATUS_SCANNING, &priv->status)) {
2170                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2171                 return -EAGAIN;
2172         }
2173
2174         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2175                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2176                                "Queuing.\n");
2177                 return -EAGAIN;
2178         }
2179
2180         IWL_DEBUG_INFO("Starting scan...\n");
2181         if (priv->cfg->sku & IWL_SKU_G)
2182                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
2183         if (priv->cfg->sku & IWL_SKU_A)
2184                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
2185         set_bit(STATUS_SCANNING, &priv->status);
2186         priv->scan_start = jiffies;
2187         priv->scan_pass_start = priv->scan_start;
2188
2189         queue_work(priv->workqueue, &priv->request_scan);
2190
2191         return 0;
2192 }
2193
2194 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2195 {
2196         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2197
2198         if (hw_decrypt)
2199                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2200         else
2201                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2202
2203         return 0;
2204 }
2205
2206 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2207                                           enum ieee80211_band band)
2208 {
2209         if (band == IEEE80211_BAND_5GHZ) {
2210                 priv->staging_rxon.flags &=
2211                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2212                       | RXON_FLG_CCK_MSK);
2213                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2214         } else {
2215                 /* Copied from iwl3945_bg_post_associate() */
2216                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2217                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2218                 else
2219                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2220
2221                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2222                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2223
2224                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2225                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2226                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2227         }
2228 }
2229
2230 /*
2231  * initialize rxon structure with default values from eeprom
2232  */
2233 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2234 {
2235         const struct iwl3945_channel_info *ch_info;
2236
2237         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2238
2239         switch (priv->iw_mode) {
2240         case NL80211_IFTYPE_AP:
2241                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2242                 break;
2243
2244         case NL80211_IFTYPE_STATION:
2245                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2246                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2247                 break;
2248
2249         case NL80211_IFTYPE_ADHOC:
2250                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2251                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2252                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2253                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2254                 break;
2255
2256         case NL80211_IFTYPE_MONITOR:
2257                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2258                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2259                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2260                 break;
2261         default:
2262                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
2263                 break;
2264         }
2265
2266 #if 0
2267         /* TODO:  Figure out when short_preamble would be set and cache from
2268          * that */
2269         if (!hw_to_local(priv->hw)->short_preamble)
2270                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2271         else
2272                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2273 #endif
2274
2275         ch_info = iwl3945_get_channel_info(priv, priv->band,
2276                                        le16_to_cpu(priv->active_rxon.channel));
2277
2278         if (!ch_info)
2279                 ch_info = &priv->channel_info[0];
2280
2281         /*
2282          * in some case A channels are all non IBSS
2283          * in this case force B/G channel
2284          */
2285         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
2286             !(is_channel_ibss(ch_info)))
2287                 ch_info = &priv->channel_info[0];
2288
2289         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2290         if (is_channel_a_band(ch_info))
2291                 priv->band = IEEE80211_BAND_5GHZ;
2292         else
2293                 priv->band = IEEE80211_BAND_2GHZ;
2294
2295         iwl3945_set_flags_for_phymode(priv, priv->band);
2296
2297         priv->staging_rxon.ofdm_basic_rates =
2298             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2299         priv->staging_rxon.cck_basic_rates =
2300             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2301 }
2302
2303 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2304 {
2305         if (mode == NL80211_IFTYPE_ADHOC) {
2306                 const struct iwl3945_channel_info *ch_info;
2307
2308                 ch_info = iwl3945_get_channel_info(priv,
2309                         priv->band,
2310                         le16_to_cpu(priv->staging_rxon.channel));
2311
2312                 if (!ch_info || !is_channel_ibss(ch_info)) {
2313                         IWL_ERROR("channel %d not IBSS channel\n",
2314                                   le16_to_cpu(priv->staging_rxon.channel));
2315                         return -EINVAL;
2316                 }
2317         }
2318
2319         priv->iw_mode = mode;
2320
2321         iwl3945_connection_init_rx_config(priv);
2322         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2323
2324         iwl3945_clear_stations_table(priv);
2325
2326         /* dont commit rxon if rf-kill is on*/
2327         if (!iwl3945_is_ready_rf(priv))
2328                 return -EAGAIN;
2329
2330         cancel_delayed_work(&priv->scan_check);
2331         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2332                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2333                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2334                 return -EAGAIN;
2335         }
2336
2337         iwl3945_commit_rxon(priv);
2338
2339         return 0;
2340 }
2341
2342 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2343                                       struct ieee80211_tx_info *info,
2344                                       struct iwl3945_cmd *cmd,
2345                                       struct sk_buff *skb_frag,
2346                                       int last_frag)
2347 {
2348         struct iwl3945_hw_key *keyinfo =
2349             &priv->stations[info->control.hw_key->hw_key_idx].keyinfo;
2350
2351         switch (keyinfo->alg) {
2352         case ALG_CCMP:
2353                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2354                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2355                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2356                 break;
2357
2358         case ALG_TKIP:
2359 #if 0
2360                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2361
2362                 if (last_frag)
2363                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2364                                8);
2365                 else
2366                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2367 #endif
2368                 break;
2369
2370         case ALG_WEP:
2371                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2372                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2373
2374                 if (keyinfo->keylen == 13)
2375                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2376
2377                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2378
2379                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2380                              "with key %d\n", info->control.hw_key->hw_key_idx);
2381                 break;
2382
2383         default:
2384                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2385                 break;
2386         }
2387 }
2388
2389 /*
2390  * handle build REPLY_TX command notification.
2391  */
2392 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2393                                   struct iwl3945_cmd *cmd,
2394                                   struct ieee80211_tx_info *info,
2395                                   struct ieee80211_hdr *hdr,
2396                                   int is_unicast, u8 std_id)
2397 {
2398         __le16 fc = hdr->frame_control;
2399         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2400
2401         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2402         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
2403                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2404                 if (ieee80211_is_mgmt(fc))
2405                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2406                 if (ieee80211_is_probe_resp(fc) &&
2407                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2408                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2409         } else {
2410                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2411                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2412         }
2413
2414         cmd->cmd.tx.sta_id = std_id;
2415         if (ieee80211_has_morefrags(fc))
2416                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2417
2418         if (ieee80211_is_data_qos(fc)) {
2419                 u8 *qc = ieee80211_get_qos_ctl(hdr);
2420                 cmd->cmd.tx.tid_tspec = qc[0] & 0xf;
2421                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2422         } else {
2423                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2424         }
2425
2426         if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
2427                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2428                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2429         } else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
2430                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2431                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2432         }
2433
2434         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2435                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2436
2437         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2438         if (ieee80211_is_mgmt(fc)) {
2439                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
2440                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2441                 else
2442                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2443         } else {
2444                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2445 #ifdef CONFIG_IWL3945_LEDS
2446                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2447 #endif
2448         }
2449
2450         cmd->cmd.tx.driver_txop = 0;
2451         cmd->cmd.tx.tx_flags = tx_flags;
2452         cmd->cmd.tx.next_frame_len = 0;
2453 }
2454
2455 /**
2456  * iwl3945_get_sta_id - Find station's index within station table
2457  */
2458 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2459 {
2460         int sta_id;
2461         u16 fc = le16_to_cpu(hdr->frame_control);
2462
2463         /* If this frame is broadcast or management, use broadcast station id */
2464         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2465             is_multicast_ether_addr(hdr->addr1))
2466                 return priv->hw_setting.bcast_sta_id;
2467
2468         switch (priv->iw_mode) {
2469
2470         /* If we are a client station in a BSS network, use the special
2471          * AP station entry (that's the only station we communicate with) */
2472         case NL80211_IFTYPE_STATION:
2473                 return IWL_AP_ID;
2474
2475         /* If we are an AP, then find the station, or use BCAST */
2476         case NL80211_IFTYPE_AP:
2477                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2478                 if (sta_id != IWL_INVALID_STATION)
2479                         return sta_id;
2480                 return priv->hw_setting.bcast_sta_id;
2481
2482         /* If this frame is going out to an IBSS network, find the station,
2483          * or create a new station table entry */
2484         case NL80211_IFTYPE_ADHOC: {
2485                 DECLARE_MAC_BUF(mac);
2486
2487                 /* Create new station table entry */
2488                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2489                 if (sta_id != IWL_INVALID_STATION)
2490                         return sta_id;
2491
2492                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2493
2494                 if (sta_id != IWL_INVALID_STATION)
2495                         return sta_id;
2496
2497                 IWL_DEBUG_DROP("Station %s not in station map. "
2498                                "Defaulting to broadcast...\n",
2499                                print_mac(mac, hdr->addr1));
2500                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2501                 return priv->hw_setting.bcast_sta_id;
2502         }
2503         /* If we are in monitor mode, use BCAST. This is required for
2504          * packet injection. */
2505         case NL80211_IFTYPE_MONITOR:
2506                 return priv->hw_setting.bcast_sta_id;
2507
2508         default:
2509                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
2510                 return priv->hw_setting.bcast_sta_id;
2511         }
2512 }
2513
2514 /*
2515  * start REPLY_TX command process
2516  */
2517 static int iwl3945_tx_skb(struct iwl3945_priv *priv, struct sk_buff *skb)
2518 {
2519         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2520         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2521         struct iwl3945_tfd_frame *tfd;
2522         u32 *control_flags;
2523         int txq_id = skb_get_queue_mapping(skb);
2524         struct iwl3945_tx_queue *txq = NULL;
2525         struct iwl3945_queue *q = NULL;
2526         dma_addr_t phys_addr;
2527         dma_addr_t txcmd_phys;
2528         struct iwl3945_cmd *out_cmd = NULL;
2529         u16 len, idx, len_org, hdr_len;
2530         u8 id;
2531         u8 unicast;
2532         u8 sta_id;
2533         u8 tid = 0;
2534         u16 seq_number = 0;
2535         __le16 fc;
2536         u8 wait_write_ptr = 0;
2537         u8 *qc = NULL;
2538         unsigned long flags;
2539         int rc;
2540
2541         spin_lock_irqsave(&priv->lock, flags);
2542         if (iwl3945_is_rfkill(priv)) {
2543                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2544                 goto drop_unlock;
2545         }
2546
2547         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
2548                 IWL_ERROR("ERROR: No TX rate available.\n");
2549                 goto drop_unlock;
2550         }
2551
2552         unicast = !is_multicast_ether_addr(hdr->addr1);
2553         id = 0;
2554
2555         fc = hdr->frame_control;
2556
2557 #ifdef CONFIG_IWL3945_DEBUG
2558         if (ieee80211_is_auth(fc))
2559                 IWL_DEBUG_TX("Sending AUTH frame\n");
2560         else if (ieee80211_is_assoc_req(fc))
2561                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2562         else if (ieee80211_is_reassoc_req(fc))
2563                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2564 #endif
2565
2566         /* drop all data frame if we are not associated */
2567         if (ieee80211_is_data(fc) &&
2568             (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */
2569             (!iwl3945_is_associated(priv) ||
2570              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
2571                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2572                 goto drop_unlock;
2573         }
2574
2575         spin_unlock_irqrestore(&priv->lock, flags);
2576
2577         hdr_len = ieee80211_hdrlen(fc);
2578
2579         /* Find (or create) index into station table for destination station */
2580         sta_id = iwl3945_get_sta_id(priv, hdr);
2581         if (sta_id == IWL_INVALID_STATION) {
2582                 DECLARE_MAC_BUF(mac);
2583
2584                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2585                                print_mac(mac, hdr->addr1));
2586                 goto drop;
2587         }
2588
2589         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2590
2591         if (ieee80211_is_data_qos(fc)) {
2592                 qc = ieee80211_get_qos_ctl(hdr);
2593                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
2594                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2595                                 IEEE80211_SCTL_SEQ;
2596                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2597                         (hdr->seq_ctrl &
2598                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2599                 seq_number += 0x10;
2600         }
2601
2602         /* Descriptor for chosen Tx queue */
2603         txq = &priv->txq[txq_id];
2604         q = &txq->q;
2605
2606         spin_lock_irqsave(&priv->lock, flags);
2607
2608         /* Set up first empty TFD within this queue's circular TFD buffer */
2609         tfd = &txq->bd[q->write_ptr];
2610         memset(tfd, 0, sizeof(*tfd));
2611         control_flags = (u32 *) tfd;
2612         idx = get_cmd_index(q, q->write_ptr, 0);
2613
2614         /* Set up driver data for this TFD */
2615         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2616         txq->txb[q->write_ptr].skb[0] = skb;
2617
2618         /* Init first empty entry in queue's array of Tx/cmd buffers */
2619         out_cmd = &txq->cmd[idx];
2620         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2621         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2622
2623         /*
2624          * Set up the Tx-command (not MAC!) header.
2625          * Store the chosen Tx queue and TFD index within the sequence field;
2626          * after Tx, uCode's Tx response will return this value so driver can
2627          * locate the frame within the tx queue and do post-tx processing.
2628          */
2629         out_cmd->hdr.cmd = REPLY_TX;
2630         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2631                                 INDEX_TO_SEQ(q->write_ptr)));
2632
2633         /* Copy MAC header from skb into command buffer */
2634         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2635
2636         /*
2637          * Use the first empty entry in this queue's command buffer array
2638          * to contain the Tx command and MAC header concatenated together
2639          * (payload data will be in another buffer).
2640          * Size of this varies, due to varying MAC header length.
2641          * If end is not dword aligned, we'll have 2 extra bytes at the end
2642          * of the MAC header (device reads on dword boundaries).
2643          * We'll tell device about this padding later.
2644          */
2645         len = priv->hw_setting.tx_cmd_len +
2646                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2647
2648         len_org = len;
2649         len = (len + 3) & ~3;
2650
2651         if (len_org != len)
2652                 len_org = 1;
2653         else
2654                 len_org = 0;
2655
2656         /* Physical address of this Tx command's header (not MAC header!),
2657          * within command buffer array. */
2658         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2659                      offsetof(struct iwl3945_cmd, hdr);
2660
2661         /* Add buffer containing Tx command and MAC(!) header to TFD's
2662          * first entry */
2663         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2664
2665         if (info->control.hw_key)
2666                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
2667
2668         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2669          * if any (802.11 null frames have no payload). */
2670         len = skb->len - hdr_len;
2671         if (len) {
2672                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2673                                            len, PCI_DMA_TODEVICE);
2674                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2675         }
2676
2677         if (!len)
2678                 /* If there is no payload, then we use only one Tx buffer */
2679                 *control_flags = TFD_CTL_COUNT_SET(1);
2680         else
2681                 /* Else use 2 buffers.
2682                  * Tell 3945 about any padding after MAC header */
2683                 *control_flags = TFD_CTL_COUNT_SET(2) |
2684                         TFD_CTL_PAD_SET(U32_PAD(len));
2685
2686         /* Total # bytes to be transmitted */
2687         len = (u16)skb->len;
2688         out_cmd->cmd.tx.len = cpu_to_le16(len);
2689
2690         /* TODO need this for burst mode later on */
2691         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, unicast, sta_id);
2692
2693         /* set is_hcca to 0; it probably will never be implemented */
2694         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
2695
2696         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2697         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2698
2699         if (!ieee80211_has_morefrags(hdr->frame_control)) {
2700                 txq->need_update = 1;
2701                 if (qc)
2702                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2703         } else {
2704                 wait_write_ptr = 1;
2705                 txq->need_update = 0;
2706         }
2707
2708         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2709                            sizeof(out_cmd->cmd.tx));
2710
2711         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2712                            ieee80211_hdrlen(fc));
2713
2714         /* Tell device the write index *just past* this latest filled TFD */
2715         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2716         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2717         spin_unlock_irqrestore(&priv->lock, flags);
2718
2719         if (rc)
2720                 return rc;
2721
2722         if ((iwl3945_queue_space(q) < q->high_mark)
2723             && priv->mac80211_registered) {
2724                 if (wait_write_ptr) {
2725                         spin_lock_irqsave(&priv->lock, flags);
2726                         txq->need_update = 1;
2727                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2728                         spin_unlock_irqrestore(&priv->lock, flags);
2729                 }
2730
2731                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
2732         }
2733
2734         return 0;
2735
2736 drop_unlock:
2737         spin_unlock_irqrestore(&priv->lock, flags);
2738 drop:
2739         return -1;
2740 }
2741
2742 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2743 {
2744         const struct ieee80211_supported_band *sband = NULL;
2745         struct ieee80211_rate *rate;
2746         int i;
2747
2748         sband = iwl3945_get_band(priv, priv->band);
2749         if (!sband) {
2750                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2751                 return;
2752         }
2753
2754         priv->active_rate = 0;
2755         priv->active_rate_basic = 0;
2756
2757         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2758                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2759
2760         for (i = 0; i < sband->n_bitrates; i++) {
2761                 rate = &sband->bitrates[i];
2762                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2763                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2764                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2765                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2766                         priv->active_rate |= (1 << rate->hw_value);
2767                 }
2768         }
2769
2770         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2771                        priv->active_rate, priv->active_rate_basic);
2772
2773         /*
2774          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2775          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2776          * OFDM
2777          */
2778         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2779                 priv->staging_rxon.cck_basic_rates =
2780                     ((priv->active_rate_basic &
2781                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2782         else
2783                 priv->staging_rxon.cck_basic_rates =
2784                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2785
2786         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2787                 priv->staging_rxon.ofdm_basic_rates =
2788                     ((priv->active_rate_basic &
2789                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2790                       IWL_FIRST_OFDM_RATE) & 0xFF;
2791         else
2792                 priv->staging_rxon.ofdm_basic_rates =
2793                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2794 }
2795
2796 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2797 {
2798         unsigned long flags;
2799
2800         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2801                 return;
2802
2803         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2804                           disable_radio ? "OFF" : "ON");
2805
2806         if (disable_radio) {
2807                 iwl3945_scan_cancel(priv);
2808                 /* FIXME: This is a workaround for AP */
2809                 if (priv->iw_mode != NL80211_IFTYPE_AP) {
2810                         spin_lock_irqsave(&priv->lock, flags);
2811                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2812                                     CSR_UCODE_SW_BIT_RFKILL);
2813                         spin_unlock_irqrestore(&priv->lock, flags);
2814                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2815                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2816                 }
2817                 return;
2818         }
2819
2820         spin_lock_irqsave(&priv->lock, flags);
2821         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2822
2823         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2824         spin_unlock_irqrestore(&priv->lock, flags);
2825
2826         /* wake up ucode */
2827         msleep(10);
2828
2829         spin_lock_irqsave(&priv->lock, flags);
2830         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2831         if (!iwl3945_grab_nic_access(priv))
2832                 iwl3945_release_nic_access(priv);
2833         spin_unlock_irqrestore(&priv->lock, flags);
2834
2835         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2836                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2837                                   "disabled by HW switch\n");
2838                 return;
2839         }
2840
2841         if (priv->is_open)
2842                 queue_work(priv->workqueue, &priv->restart);
2843         return;
2844 }
2845
2846 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2847                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2848 {
2849         u16 fc =
2850             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2851
2852         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2853                 return;
2854
2855         if (!(fc & IEEE80211_FCTL_PROTECTED))
2856                 return;
2857
2858         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2859         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2860         case RX_RES_STATUS_SEC_TYPE_TKIP:
2861                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2862                     RX_RES_STATUS_BAD_ICV_MIC)
2863                         stats->flag |= RX_FLAG_MMIC_ERROR;
2864         case RX_RES_STATUS_SEC_TYPE_WEP:
2865         case RX_RES_STATUS_SEC_TYPE_CCMP:
2866                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2867                     RX_RES_STATUS_DECRYPT_OK) {
2868                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2869                         stats->flag |= RX_FLAG_DECRYPTED;
2870                 }
2871                 break;
2872
2873         default:
2874                 break;
2875         }
2876 }
2877
2878 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2879
2880 #include "iwl-spectrum.h"
2881
2882 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2883 #define BEACON_TIME_MASK_HIGH   0xFF000000
2884 #define TIME_UNIT               1024
2885
2886 /*
2887  * extended beacon time format
2888  * time in usec will be changed into a 32-bit value in 8:24 format
2889  * the high 1 byte is the beacon counts
2890  * the lower 3 bytes is the time in usec within one beacon interval
2891  */
2892
2893 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2894 {
2895         u32 quot;
2896         u32 rem;
2897         u32 interval = beacon_interval * 1024;
2898
2899         if (!interval || !usec)
2900                 return 0;
2901
2902         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2903         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2904
2905         return (quot << 24) + rem;
2906 }
2907
2908 /* base is usually what we get from ucode with each received frame,
2909  * the same as HW timer counter counting down
2910  */
2911
2912 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2913 {
2914         u32 base_low = base & BEACON_TIME_MASK_LOW;
2915         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2916         u32 interval = beacon_interval * TIME_UNIT;
2917         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2918             (addon & BEACON_TIME_MASK_HIGH);
2919
2920         if (base_low > addon_low)
2921                 res += base_low - addon_low;
2922         else if (base_low < addon_low) {
2923                 res += interval + base_low - addon_low;
2924                 res += (1 << 24);
2925         } else
2926                 res += (1 << 24);
2927
2928         return cpu_to_le32(res);
2929 }
2930
2931 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
2932                                struct ieee80211_measurement_params *params,
2933                                u8 type)
2934 {
2935         struct iwl3945_spectrum_cmd spectrum;
2936         struct iwl3945_rx_packet *res;
2937         struct iwl3945_host_cmd cmd = {
2938                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2939                 .data = (void *)&spectrum,
2940                 .meta.flags = CMD_WANT_SKB,
2941         };
2942         u32 add_time = le64_to_cpu(params->start_time);
2943         int rc;
2944         int spectrum_resp_status;
2945         int duration = le16_to_cpu(params->duration);
2946
2947         if (iwl3945_is_associated(priv))
2948                 add_time =
2949                     iwl3945_usecs_to_beacons(
2950                         le64_to_cpu(params->start_time) - priv->last_tsf,
2951                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2952
2953         memset(&spectrum, 0, sizeof(spectrum));
2954
2955         spectrum.channel_count = cpu_to_le16(1);
2956         spectrum.flags =
2957             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2958         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2959         cmd.len = sizeof(spectrum);
2960         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2961
2962         if (iwl3945_is_associated(priv))
2963                 spectrum.start_time =
2964                     iwl3945_add_beacon_time(priv->last_beacon_time,
2965                                 add_time,
2966                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2967         else
2968                 spectrum.start_time = 0;
2969
2970         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2971         spectrum.channels[0].channel = params->channel;
2972         spectrum.channels[0].type = type;
2973         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2974                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2975                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2976
2977         rc = iwl3945_send_cmd_sync(priv, &cmd);
2978         if (rc)
2979                 return rc;
2980
2981         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
2982         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2983                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2984                 rc = -EIO;
2985         }
2986
2987         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2988         switch (spectrum_resp_status) {
2989         case 0:         /* Command will be handled */
2990                 if (res->u.spectrum.id != 0xff) {
2991                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
2992                                                 res->u.spectrum.id);
2993                         priv->measurement_status &= ~MEASUREMENT_READY;
2994                 }
2995                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2996                 rc = 0;
2997                 break;
2998
2999         case 1:         /* Command will not be handled */
3000                 rc = -EAGAIN;
3001                 break;
3002         }
3003
3004         dev_kfree_skb_any(cmd.meta.u.skb);
3005
3006         return rc;
3007 }
3008 #endif
3009
3010 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3011                                struct iwl3945_rx_mem_buffer *rxb)
3012 {
3013         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3014         struct iwl3945_alive_resp *palive;
3015         struct delayed_work *pwork;
3016
3017         palive = &pkt->u.alive_frame;
3018
3019         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3020                        "0x%01X 0x%01X\n",
3021                        palive->is_valid, palive->ver_type,
3022                        palive->ver_subtype);
3023
3024         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3025                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3026                 memcpy(&priv->card_alive_init,
3027                        &pkt->u.alive_frame,
3028                        sizeof(struct iwl3945_init_alive_resp));
3029                 pwork = &priv->init_alive_start;
3030         } else {
3031                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3032                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3033                        sizeof(struct iwl3945_alive_resp));
3034                 pwork = &priv->alive_start;
3035                 iwl3945_disable_events(priv);
3036         }
3037
3038         /* We delay the ALIVE response by 5ms to
3039          * give the HW RF Kill time to activate... */
3040         if (palive->is_valid == UCODE_VALID_OK)
3041                 queue_delayed_work(priv->workqueue, pwork,
3042                                    msecs_to_jiffies(5));
3043         else
3044                 IWL_WARNING("uCode did not respond OK.\n");
3045 }
3046
3047 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3048                                  struct iwl3945_rx_mem_buffer *rxb)
3049 {
3050         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3051
3052         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3053         return;
3054 }
3055
3056 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3057                                struct iwl3945_rx_mem_buffer *rxb)
3058 {
3059         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3060
3061         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3062                 "seq 0x%04X ser 0x%08X\n",
3063                 le32_to_cpu(pkt->u.err_resp.error_type),
3064                 get_cmd_string(pkt->u.err_resp.cmd_id),
3065                 pkt->u.err_resp.cmd_id,
3066                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3067                 le32_to_cpu(pkt->u.err_resp.error_info));
3068 }
3069
3070 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3071
3072 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3073 {
3074         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3075         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3076         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3077         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3078                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3079         rxon->channel = csa->channel;
3080         priv->staging_rxon.channel = csa->channel;
3081 }
3082
3083 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3084                                           struct iwl3945_rx_mem_buffer *rxb)
3085 {
3086 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3087         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3088         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3089
3090         if (!report->state) {
3091                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3092                           "Spectrum Measure Notification: Start\n");
3093                 return;
3094         }
3095
3096         memcpy(&priv->measure_report, report, sizeof(*report));
3097         priv->measurement_status |= MEASUREMENT_READY;
3098 #endif
3099 }
3100
3101 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3102                                   struct iwl3945_rx_mem_buffer *rxb)
3103 {
3104 #ifdef CONFIG_IWL3945_DEBUG
3105         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3106         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3107         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3108                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3109 #endif
3110 }
3111
3112 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3113                                              struct iwl3945_rx_mem_buffer *rxb)
3114 {
3115         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3116         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3117                         "notification for %s:\n",
3118                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3119         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3120 }
3121
3122 static void iwl3945_bg_beacon_update(struct work_struct *work)
3123 {
3124         struct iwl3945_priv *priv =
3125                 container_of(work, struct iwl3945_priv, beacon_update);
3126         struct sk_buff *beacon;
3127
3128         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3129         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
3130
3131         if (!beacon) {
3132                 IWL_ERROR("update beacon failed\n");
3133                 return;
3134         }
3135
3136         mutex_lock(&priv->mutex);
3137         /* new beacon skb is allocated every time; dispose previous.*/
3138         if (priv->ibss_beacon)
3139                 dev_kfree_skb(priv->ibss_beacon);
3140
3141         priv->ibss_beacon = beacon;
3142         mutex_unlock(&priv->mutex);
3143
3144         iwl3945_send_beacon_cmd(priv);
3145 }
3146
3147 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3148                                 struct iwl3945_rx_mem_buffer *rxb)
3149 {
3150 #ifdef CONFIG_IWL3945_DEBUG
3151         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3152         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3153         u8 rate = beacon->beacon_notify_hdr.rate;
3154
3155         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3156                 "tsf %d %d rate %d\n",
3157                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3158                 beacon->beacon_notify_hdr.failure_frame,
3159                 le32_to_cpu(beacon->ibss_mgr_status),
3160                 le32_to_cpu(beacon->high_tsf),
3161                 le32_to_cpu(beacon->low_tsf), rate);
3162 #endif
3163
3164         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
3165             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3166                 queue_work(priv->workqueue, &priv->beacon_update);
3167 }
3168
3169 /* Service response to REPLY_SCAN_CMD (0x80) */
3170 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3171                               struct iwl3945_rx_mem_buffer *rxb)
3172 {
3173 #ifdef CONFIG_IWL3945_DEBUG
3174         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3175         struct iwl3945_scanreq_notification *notif =
3176             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3177
3178         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3179 #endif
3180 }
3181
3182 /* Service SCAN_START_NOTIFICATION (0x82) */
3183 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3184                                     struct iwl3945_rx_mem_buffer *rxb)
3185 {
3186         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3187         struct iwl3945_scanstart_notification *notif =
3188             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3189         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3190         IWL_DEBUG_SCAN("Scan start: "
3191                        "%d [802.11%s] "
3192                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3193                        notif->channel,
3194                        notif->band ? "bg" : "a",
3195                        notif->tsf_high,
3196                        notif->tsf_low, notif->status, notif->beacon_timer);
3197 }
3198
3199 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3200 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3201                                       struct iwl3945_rx_mem_buffer *rxb)
3202 {
3203         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3204         struct iwl3945_scanresults_notification *notif =
3205             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3206
3207         IWL_DEBUG_SCAN("Scan ch.res: "
3208                        "%d [802.11%s] "
3209                        "(TSF: 0x%08X:%08X) - %d "
3210                        "elapsed=%lu usec (%dms since last)\n",
3211                        notif->channel,
3212                        notif->band ? "bg" : "a",
3213                        le32_to_cpu(notif->tsf_high),
3214                        le32_to_cpu(notif->tsf_low),
3215                        le32_to_cpu(notif->statistics[0]),
3216                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3217                        jiffies_to_msecs(elapsed_jiffies
3218                                         (priv->last_scan_jiffies, jiffies)));
3219
3220         priv->last_scan_jiffies = jiffies;
3221         priv->next_scan_jiffies = 0;
3222 }
3223
3224 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3225 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3226                                        struct iwl3945_rx_mem_buffer *rxb)
3227 {
3228         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3229         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3230
3231         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3232                        scan_notif->scanned_channels,
3233                        scan_notif->tsf_low,
3234                        scan_notif->tsf_high, scan_notif->status);
3235
3236         /* The HW is no longer scanning */
3237         clear_bit(STATUS_SCAN_HW, &priv->status);
3238
3239         /* The scan completion notification came in, so kill that timer... */
3240         cancel_delayed_work(&priv->scan_check);
3241
3242         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3243                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
3244                                                         "2.4" : "5.2",
3245                        jiffies_to_msecs(elapsed_jiffies
3246                                         (priv->scan_pass_start, jiffies)));
3247
3248         /* Remove this scanned band from the list of pending
3249          * bands to scan, band G precedes A in order of scanning
3250          * as seen in iwl3945_bg_request_scan */
3251         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
3252                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
3253         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
3254                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
3255
3256         /* If a request to abort was given, or the scan did not succeed
3257          * then we reset the scan state machine and terminate,
3258          * re-queuing another scan if one has been requested */
3259         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3260                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3261                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3262         } else {
3263                 /* If there are more bands on this scan pass reschedule */
3264                 if (priv->scan_bands > 0)
3265                         goto reschedule;
3266         }
3267
3268         priv->last_scan_jiffies = jiffies;
3269         priv->next_scan_jiffies = 0;
3270         IWL_DEBUG_INFO("Setting scan to off\n");
3271
3272         clear_bit(STATUS_SCANNING, &priv->status);
3273
3274         IWL_DEBUG_INFO("Scan took %dms\n",
3275                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3276
3277         queue_work(priv->workqueue, &priv->scan_completed);
3278
3279         return;
3280
3281 reschedule:
3282         priv->scan_pass_start = jiffies;
3283         queue_work(priv->workqueue, &priv->request_scan);
3284 }
3285
3286 /* Handle notification from uCode that card's power state is changing
3287  * due to software, hardware, or critical temperature RFKILL */
3288 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3289                                     struct iwl3945_rx_mem_buffer *rxb)
3290 {
3291         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3292         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3293         unsigned long status = priv->status;
3294
3295         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3296                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3297                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3298
3299         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3300                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3301
3302         if (flags & HW_CARD_DISABLED)
3303                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3304         else
3305                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3306
3307
3308         if (flags & SW_CARD_DISABLED)
3309                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3310         else
3311                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3312
3313         iwl3945_scan_cancel(priv);
3314
3315         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3316              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3317             (test_bit(STATUS_RF_KILL_SW, &status) !=
3318              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3319                 queue_work(priv->workqueue, &priv->rf_kill);
3320         else
3321                 wake_up_interruptible(&priv->wait_command_queue);
3322 }
3323
3324 /**
3325  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3326  *
3327  * Setup the RX handlers for each of the reply types sent from the uCode
3328  * to the host.
3329  *
3330  * This function chains into the hardware specific files for them to setup
3331  * any hardware specific handlers as well.
3332  */
3333 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3334 {
3335         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3336         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3337         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3338         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3339         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3340             iwl3945_rx_spectrum_measure_notif;
3341         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3342         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3343             iwl3945_rx_pm_debug_statistics_notif;
3344         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3345
3346         /*
3347          * The same handler is used for both the REPLY to a discrete
3348          * statistics request from the host as well as for the periodic
3349          * statistics notifications (after received beacons) from the uCode.
3350          */
3351         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3352         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3353
3354         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3355         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3356         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3357             iwl3945_rx_scan_results_notif;
3358         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3359             iwl3945_rx_scan_complete_notif;
3360         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3361
3362         /* Set up hardware specific Rx handlers */
3363         iwl3945_hw_rx_handler_setup(priv);
3364 }
3365
3366 /**
3367  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3368  * When FW advances 'R' index, all entries between old and new 'R' index
3369  * need to be reclaimed.
3370  */
3371 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3372                                       int txq_id, int index)
3373 {
3374         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3375         struct iwl3945_queue *q = &txq->q;
3376         int nfreed = 0;
3377
3378         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3379                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3380                           "is out of range [0-%d] %d %d.\n", txq_id,
3381                           index, q->n_bd, q->write_ptr, q->read_ptr);
3382                 return;
3383         }
3384
3385         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3386                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3387                 if (nfreed > 1) {
3388                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3389                                         q->write_ptr, q->read_ptr);
3390                         queue_work(priv->workqueue, &priv->restart);
3391                         break;
3392                 }
3393                 nfreed++;
3394         }
3395 }
3396
3397
3398 /**
3399  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3400  * @rxb: Rx buffer to reclaim
3401  *
3402  * If an Rx buffer has an async callback associated with it the callback
3403  * will be executed.  The attached skb (if present) will only be freed
3404  * if the callback returns 1
3405  */
3406 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3407                                 struct iwl3945_rx_mem_buffer *rxb)
3408 {
3409         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3410         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3411         int txq_id = SEQ_TO_QUEUE(sequence);
3412         int index = SEQ_TO_INDEX(sequence);
3413         int huge = sequence & SEQ_HUGE_FRAME;
3414         int cmd_index;
3415         struct iwl3945_cmd *cmd;
3416
3417         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3418
3419         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3420         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3421
3422         /* Input error checking is done when commands are added to queue. */
3423         if (cmd->meta.flags & CMD_WANT_SKB) {
3424                 cmd->meta.source->u.skb = rxb->skb;
3425                 rxb->skb = NULL;
3426         } else if (cmd->meta.u.callback &&
3427                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3428                 rxb->skb = NULL;
3429
3430         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3431
3432         if (!(cmd->meta.flags & CMD_ASYNC)) {
3433                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3434                 wake_up_interruptible(&priv->wait_command_queue);
3435         }
3436 }
3437
3438 /************************** RX-FUNCTIONS ****************************/
3439 /*
3440  * Rx theory of operation
3441  *
3442  * The host allocates 32 DMA target addresses and passes the host address
3443  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3444  * 0 to 31
3445  *
3446  * Rx Queue Indexes
3447  * The host/firmware share two index registers for managing the Rx buffers.
3448  *
3449  * The READ index maps to the first position that the firmware may be writing
3450  * to -- the driver can read up to (but not including) this position and get
3451  * good data.
3452  * The READ index is managed by the firmware once the card is enabled.
3453  *
3454  * The WRITE index maps to the last position the driver has read from -- the
3455  * position preceding WRITE is the last slot the firmware can place a packet.
3456  *
3457  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3458  * WRITE = READ.
3459  *
3460  * During initialization, the host sets up the READ queue position to the first
3461  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3462  *
3463  * When the firmware places a packet in a buffer, it will advance the READ index
3464  * and fire the RX interrupt.  The driver can then query the READ index and
3465  * process as many packets as possible, moving the WRITE index forward as it
3466  * resets the Rx queue buffers with new memory.
3467  *
3468  * The management in the driver is as follows:
3469  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3470  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3471  *   to replenish the iwl->rxq->rx_free.
3472  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3473  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3474  *   'processed' and 'read' driver indexes as well)
3475  * + A received packet is processed and handed to the kernel network stack,
3476  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3477  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3478  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3479  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3480  *   were enough free buffers and RX_STALLED is set it is cleared.
3481  *
3482  *
3483  * Driver sequence:
3484  *
3485  * iwl3945_rx_queue_alloc()   Allocates rx_free
3486  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3487  *                            iwl3945_rx_queue_restock
3488  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3489  *                            queue, updates firmware pointers, and updates
3490  *                            the WRITE index.  If insufficient rx_free buffers
3491  *                            are available, schedules iwl3945_rx_replenish
3492  *
3493  * -- enable interrupts --
3494  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3495  *                            READ INDEX, detaching the SKB from the pool.
3496  *                            Moves the packet buffer from queue to rx_used.
3497  *                            Calls iwl3945_rx_queue_restock to refill any empty
3498  *                            slots.
3499  * ...
3500  *
3501  */
3502
3503 /**
3504  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3505  */
3506 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3507 {
3508         int s = q->read - q->write;
3509         if (s <= 0)
3510                 s += RX_QUEUE_SIZE;
3511         /* keep some buffer to not confuse full and empty queue */
3512         s -= 2;
3513         if (s < 0)
3514                 s = 0;
3515         return s;
3516 }
3517
3518 /**
3519  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3520  */
3521 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3522 {
3523         u32 reg = 0;
3524         int rc = 0;
3525         unsigned long flags;
3526
3527         spin_lock_irqsave(&q->lock, flags);
3528
3529         if (q->need_update == 0)
3530                 goto exit_unlock;
3531
3532         /* If power-saving is in use, make sure device is awake */
3533         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3534                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3535
3536                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3537                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3538                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3539                         goto exit_unlock;
3540                 }
3541
3542                 rc = iwl3945_grab_nic_access(priv);
3543                 if (rc)
3544                         goto exit_unlock;
3545
3546                 /* Device expects a multiple of 8 */
3547                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3548                                      q->write & ~0x7);
3549                 iwl3945_release_nic_access(priv);
3550
3551         /* Else device is assumed to be awake */
3552         } else
3553                 /* Device expects a multiple of 8 */
3554                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3555
3556
3557         q->need_update = 0;
3558
3559  exit_unlock:
3560         spin_unlock_irqrestore(&q->lock, flags);
3561         return rc;
3562 }
3563
3564 /**
3565  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3566  */
3567 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3568                                           dma_addr_t dma_addr)
3569 {
3570         return cpu_to_le32((u32)dma_addr);
3571 }
3572
3573 /**
3574  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3575  *
3576  * If there are slots in the RX queue that need to be restocked,
3577  * and we have free pre-allocated buffers, fill the ranks as much
3578  * as we can, pulling from rx_free.
3579  *
3580  * This moves the 'write' index forward to catch up with 'processed', and
3581  * also updates the memory address in the firmware to reference the new
3582  * target buffer.
3583  */
3584 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3585 {
3586         struct iwl3945_rx_queue *rxq = &priv->rxq;
3587         struct list_head *element;
3588         struct iwl3945_rx_mem_buffer *rxb;
3589         unsigned long flags;
3590         int write, rc;
3591
3592         spin_lock_irqsave(&rxq->lock, flags);
3593         write = rxq->write & ~0x7;
3594         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3595                 /* Get next free Rx buffer, remove from free list */
3596                 element = rxq->rx_free.next;
3597                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3598                 list_del(element);
3599
3600                 /* Point to Rx buffer via next RBD in circular buffer */
3601                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3602                 rxq->queue[rxq->write] = rxb;
3603                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3604                 rxq->free_count--;
3605         }
3606         spin_unlock_irqrestore(&rxq->lock, flags);
3607         /* If the pre-allocated buffer pool is dropping low, schedule to
3608          * refill it */
3609         if (rxq->free_count <= RX_LOW_WATERMARK)
3610                 queue_work(priv->workqueue, &priv->rx_replenish);
3611
3612
3613         /* If we've added more space for the firmware to place data, tell it.
3614          * Increment device's write pointer in multiples of 8. */
3615         if ((write != (rxq->write & ~0x7))
3616             || (abs(rxq->write - rxq->read) > 7)) {
3617                 spin_lock_irqsave(&rxq->lock, flags);
3618                 rxq->need_update = 1;
3619                 spin_unlock_irqrestore(&rxq->lock, flags);
3620                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3621                 if (rc)
3622                         return rc;
3623         }
3624
3625         return 0;
3626 }
3627
3628 /**
3629  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3630  *
3631  * When moving to rx_free an SKB is allocated for the slot.
3632  *
3633  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3634  * This is called as a scheduled work item (except for during initialization)
3635  */
3636 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3637 {
3638         struct iwl3945_rx_queue *rxq = &priv->rxq;
3639         struct list_head *element;
3640         struct iwl3945_rx_mem_buffer *rxb;
3641         unsigned long flags;
3642         spin_lock_irqsave(&rxq->lock, flags);
3643         while (!list_empty(&rxq->rx_used)) {
3644                 element = rxq->rx_used.next;
3645                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3646
3647                 /* Alloc a new receive buffer */
3648                 rxb->skb =
3649                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3650                 if (!rxb->skb) {
3651                         if (net_ratelimit())
3652                                 printk(KERN_CRIT DRV_NAME
3653                                        ": Can not allocate SKB buffers\n");
3654                         /* We don't reschedule replenish work here -- we will
3655                          * call the restock method and if it still needs
3656                          * more buffers it will schedule replenish */
3657                         break;
3658                 }
3659
3660                 /* If radiotap head is required, reserve some headroom here.
3661                  * The physical head count is a variable rx_stats->phy_count.
3662                  * We reserve 4 bytes here. Plus these extra bytes, the
3663                  * headroom of the physical head should be enough for the
3664                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3665                  */
3666                 skb_reserve(rxb->skb, 4);
3667
3668                 priv->alloc_rxb_skb++;
3669                 list_del(element);
3670
3671                 /* Get physical address of RB/SKB */
3672                 rxb->dma_addr =
3673                     pci_map_single(priv->pci_dev, rxb->skb->data,
3674                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3675                 list_add_tail(&rxb->list, &rxq->rx_free);
3676                 rxq->free_count++;
3677         }
3678         spin_unlock_irqrestore(&rxq->lock, flags);
3679 }
3680
3681 /*
3682  * this should be called while priv->lock is locked
3683  */
3684 static void __iwl3945_rx_replenish(void *data)
3685 {
3686         struct iwl3945_priv *priv = data;
3687
3688         iwl3945_rx_allocate(priv);
3689         iwl3945_rx_queue_restock(priv);
3690 }
3691
3692
3693 void iwl3945_rx_replenish(void *data)
3694 {
3695         struct iwl3945_priv *priv = data;
3696         unsigned long flags;
3697
3698         iwl3945_rx_allocate(priv);
3699
3700         spin_lock_irqsave(&priv->lock, flags);
3701         iwl3945_rx_queue_restock(priv);
3702         spin_unlock_irqrestore(&priv->lock, flags);
3703 }
3704
3705 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3706  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3707  * This free routine walks the list of POOL entries and if SKB is set to
3708  * non NULL it is unmapped and freed
3709  */
3710 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3711 {
3712         int i;
3713         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3714                 if (rxq->pool[i].skb != NULL) {
3715                         pci_unmap_single(priv->pci_dev,
3716                                          rxq->pool[i].dma_addr,
3717                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3718                         dev_kfree_skb(rxq->pool[i].skb);
3719                 }
3720         }
3721
3722         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3723                             rxq->dma_addr);
3724         rxq->bd = NULL;
3725 }
3726
3727 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3728 {
3729         struct iwl3945_rx_queue *rxq = &priv->rxq;
3730         struct pci_dev *dev = priv->pci_dev;
3731         int i;
3732
3733         spin_lock_init(&rxq->lock);
3734         INIT_LIST_HEAD(&rxq->rx_free);
3735         INIT_LIST_HEAD(&rxq->rx_used);
3736
3737         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3738         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3739         if (!rxq->bd)
3740                 return -ENOMEM;
3741
3742         /* Fill the rx_used queue with _all_ of the Rx buffers */
3743         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3744                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3745
3746         /* Set us so that we have processed and used all buffers, but have
3747          * not restocked the Rx queue with fresh buffers */
3748         rxq->read = rxq->write = 0;
3749         rxq->free_count = 0;
3750         rxq->need_update = 0;
3751         return 0;
3752 }
3753
3754 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3755 {
3756         unsigned long flags;
3757         int i;
3758         spin_lock_irqsave(&rxq->lock, flags);
3759         INIT_LIST_HEAD(&rxq->rx_free);
3760         INIT_LIST_HEAD(&rxq->rx_used);
3761         /* Fill the rx_used queue with _all_ of the Rx buffers */
3762         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3763                 /* In the reset function, these buffers may have been allocated
3764                  * to an SKB, so we need to unmap and free potential storage */
3765                 if (rxq->pool[i].skb != NULL) {
3766                         pci_unmap_single(priv->pci_dev,
3767                                          rxq->pool[i].dma_addr,
3768                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3769                         priv->alloc_rxb_skb--;
3770                         dev_kfree_skb(rxq->pool[i].skb);
3771                         rxq->pool[i].skb = NULL;
3772                 }
3773                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3774         }
3775
3776         /* Set us so that we have processed and used all buffers, but have
3777          * not restocked the Rx queue with fresh buffers */
3778         rxq->read = rxq->write = 0;
3779         rxq->free_count = 0;
3780         spin_unlock_irqrestore(&rxq->lock, flags);
3781 }
3782
3783 /* Convert linear signal-to-noise ratio into dB */
3784 static u8 ratio2dB[100] = {
3785 /*       0   1   2   3   4   5   6   7   8   9 */
3786          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3787         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3788         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3789         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3790         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3791         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3792         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3793         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3794         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3795         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3796 };
3797
3798 /* Calculates a relative dB value from a ratio of linear
3799  *   (i.e. not dB) signal levels.
3800  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3801 int iwl3945_calc_db_from_ratio(int sig_ratio)
3802 {
3803         /* 1000:1 or higher just report as 60 dB */
3804         if (sig_ratio >= 1000)
3805                 return 60;
3806
3807         /* 100:1 or higher, divide by 10 and use table,
3808          *   add 20 dB to make up for divide by 10 */
3809         if (sig_ratio >= 100)
3810                 return 20 + (int)ratio2dB[sig_ratio/10];
3811
3812         /* We shouldn't see this */
3813         if (sig_ratio < 1)
3814                 return 0;
3815
3816         /* Use table for ratios 1:1 - 99:1 */
3817         return (int)ratio2dB[sig_ratio];
3818 }
3819
3820 #define PERFECT_RSSI (-20) /* dBm */
3821 #define WORST_RSSI (-95)   /* dBm */
3822 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3823
3824 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3825  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3826  *   about formulas used below. */
3827 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3828 {
3829         int sig_qual;
3830         int degradation = PERFECT_RSSI - rssi_dbm;
3831
3832         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3833          * as indicator; formula is (signal dbm - noise dbm).
3834          * SNR at or above 40 is a great signal (100%).
3835          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3836          * Weakest usable signal is usually 10 - 15 dB SNR. */
3837         if (noise_dbm) {
3838                 if (rssi_dbm - noise_dbm >= 40)
3839                         return 100;
3840                 else if (rssi_dbm < noise_dbm)
3841                         return 0;
3842                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3843
3844         /* Else use just the signal level.
3845          * This formula is a least squares fit of data points collected and
3846          *   compared with a reference system that had a percentage (%) display
3847          *   for signal quality. */
3848         } else
3849                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3850                             (15 * RSSI_RANGE + 62 * degradation)) /
3851                            (RSSI_RANGE * RSSI_RANGE);
3852
3853         if (sig_qual > 100)
3854                 sig_qual = 100;
3855         else if (sig_qual < 1)
3856                 sig_qual = 0;
3857
3858         return sig_qual;
3859 }
3860
3861 /**
3862  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3863  *
3864  * Uses the priv->rx_handlers callback function array to invoke
3865  * the appropriate handlers, including command responses,
3866  * frame-received notifications, and other notifications.
3867  */
3868 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3869 {
3870         struct iwl3945_rx_mem_buffer *rxb;
3871         struct iwl3945_rx_packet *pkt;
3872         struct iwl3945_rx_queue *rxq = &priv->rxq;
3873         u32 r, i;
3874         int reclaim;
3875         unsigned long flags;
3876         u8 fill_rx = 0;
3877         u32 count = 8;
3878
3879         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3880          * buffer that the driver may process (last buffer filled by ucode). */
3881         r = iwl3945_hw_get_rx_read(priv);
3882         i = rxq->read;
3883
3884         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3885                 fill_rx = 1;
3886         /* Rx interrupt, but nothing sent from uCode */
3887         if (i == r)
3888                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3889
3890         while (i != r) {
3891                 rxb = rxq->queue[i];
3892
3893                 /* If an RXB doesn't have a Rx queue slot associated with it,
3894                  * then a bug has been introduced in the queue refilling
3895                  * routines -- catch it here */
3896                 BUG_ON(rxb == NULL);
3897
3898                 rxq->queue[i] = NULL;
3899
3900                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3901                                             IWL_RX_BUF_SIZE,
3902                                             PCI_DMA_FROMDEVICE);
3903                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3904
3905                 /* Reclaim a command buffer only if this packet is a response
3906                  *   to a (driver-originated) command.
3907                  * If the packet (e.g. Rx frame) originated from uCode,
3908                  *   there is no command buffer to reclaim.
3909                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3910                  *   but apparently a few don't get set; catch them here. */
3911                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3912                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3913                         (pkt->hdr.cmd != REPLY_TX);
3914
3915                 /* Based on type of command response or notification,
3916                  *   handle those that need handling via function in
3917                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
3918                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3919                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3920                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3921                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3922                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3923                 } else {
3924                         /* No handling needed */
3925                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3926                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3927                                 r, i, get_cmd_string(pkt->hdr.cmd),
3928                                 pkt->hdr.cmd);
3929                 }
3930
3931                 if (reclaim) {
3932                         /* Invoke any callbacks, transfer the skb to caller, and
3933                          * fire off the (possibly) blocking iwl3945_send_cmd()
3934                          * as we reclaim the driver command queue */
3935                         if (rxb && rxb->skb)
3936                                 iwl3945_tx_cmd_complete(priv, rxb);
3937                         else
3938                                 IWL_WARNING("Claim null rxb?\n");
3939                 }
3940
3941                 /* For now we just don't re-use anything.  We can tweak this
3942                  * later to try and re-use notification packets and SKBs that
3943                  * fail to Rx correctly */
3944                 if (rxb->skb != NULL) {
3945                         priv->alloc_rxb_skb--;
3946                         dev_kfree_skb_any(rxb->skb);
3947                         rxb->skb = NULL;
3948                 }
3949
3950                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3951                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3952                 spin_lock_irqsave(&rxq->lock, flags);
3953                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3954                 spin_unlock_irqrestore(&rxq->lock, flags);
3955                 i = (i + 1) & RX_QUEUE_MASK;
3956                 /* If there are a lot of unused frames,
3957                  * restock the Rx queue so ucode won't assert. */
3958                 if (fill_rx) {
3959                         count++;
3960                         if (count >= 8) {
3961                                 priv->rxq.read = i;
3962                                 __iwl3945_rx_replenish(priv);
3963                                 count = 0;
3964                         }
3965                 }
3966         }
3967
3968         /* Backtrack one entry */
3969         priv->rxq.read = i;
3970         iwl3945_rx_queue_restock(priv);
3971 }
3972
3973 /**
3974  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
3975  */
3976 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
3977                                   struct iwl3945_tx_queue *txq)
3978 {
3979         u32 reg = 0;
3980         int rc = 0;
3981         int txq_id = txq->q.id;
3982
3983         if (txq->need_update == 0)
3984                 return rc;
3985
3986         /* if we're trying to save power */
3987         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3988                 /* wake up nic if it's powered down ...
3989                  * uCode will wake up, and interrupt us again, so next
3990                  * time we'll skip this part. */
3991                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3992
3993                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3994                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3995                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3996                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3997                         return rc;
3998                 }
3999
4000                 /* restore this queue's parameters in nic hardware. */
4001                 rc = iwl3945_grab_nic_access(priv);
4002                 if (rc)
4003                         return rc;
4004                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4005                                      txq->q.write_ptr | (txq_id << 8));
4006                 iwl3945_release_nic_access(priv);
4007
4008         /* else not in power-save mode, uCode will never sleep when we're
4009          * trying to tx (during RFKILL, we're not trying to tx). */
4010         } else
4011                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4012                             txq->q.write_ptr | (txq_id << 8));
4013
4014         txq->need_update = 0;
4015
4016         return rc;
4017 }
4018
4019 #ifdef CONFIG_IWL3945_DEBUG
4020 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4021 {
4022         DECLARE_MAC_BUF(mac);
4023
4024         IWL_DEBUG_RADIO("RX CONFIG:\n");
4025         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4026         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4027         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4028         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4029                         le32_to_cpu(rxon->filter_flags));
4030         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4031         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4032                         rxon->ofdm_basic_rates);
4033         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4034         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4035                         print_mac(mac, rxon->node_addr));
4036         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4037                         print_mac(mac, rxon->bssid_addr));
4038         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4039 }
4040 #endif
4041
4042 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4043 {
4044         IWL_DEBUG_ISR("Enabling interrupts\n");
4045         set_bit(STATUS_INT_ENABLED, &priv->status);
4046         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4047 }
4048
4049
4050 /* call this function to flush any scheduled tasklet */
4051 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
4052 {
4053         /* wait to make sure we flush pedding tasklet*/
4054         synchronize_irq(priv->pci_dev->irq);
4055         tasklet_kill(&priv->irq_tasklet);
4056 }
4057
4058
4059 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4060 {
4061         clear_bit(STATUS_INT_ENABLED, &priv->status);
4062
4063         /* disable interrupts from uCode/NIC to host */
4064         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4065
4066         /* acknowledge/clear/reset any interrupts still pending
4067          * from uCode or flow handler (Rx/Tx DMA) */
4068         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4069         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4070         IWL_DEBUG_ISR("Disabled interrupts\n");
4071 }
4072
4073 static const char *desc_lookup(int i)
4074 {
4075         switch (i) {
4076         case 1:
4077                 return "FAIL";
4078         case 2:
4079                 return "BAD_PARAM";
4080         case 3:
4081                 return "BAD_CHECKSUM";
4082         case 4:
4083                 return "NMI_INTERRUPT";
4084         case 5:
4085                 return "SYSASSERT";
4086         case 6:
4087                 return "FATAL_ERROR";
4088         }
4089
4090         return "UNKNOWN";
4091 }
4092
4093 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4094 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4095
4096 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4097 {
4098         u32 i;
4099         u32 desc, time, count, base, data1;
4100         u32 blink1, blink2, ilink1, ilink2;
4101         int rc;
4102
4103         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4104
4105         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4106                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4107                 return;
4108         }
4109
4110         rc = iwl3945_grab_nic_access(priv);
4111         if (rc) {
4112                 IWL_WARNING("Can not read from adapter at this time.\n");
4113                 return;
4114         }
4115
4116         count = iwl3945_read_targ_mem(priv, base);
4117
4118         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4119                 IWL_ERROR("Start IWL Error Log Dump:\n");
4120                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4121         }
4122
4123         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4124                   "ilink1  nmiPC   Line\n");
4125         for (i = ERROR_START_OFFSET;
4126              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4127              i += ERROR_ELEM_SIZE) {
4128                 desc = iwl3945_read_targ_mem(priv, base + i);
4129                 time =
4130                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4131                 blink1 =
4132                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4133                 blink2 =
4134                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4135                 ilink1 =
4136                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4137                 ilink2 =
4138                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4139                 data1 =
4140                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4141
4142                 IWL_ERROR
4143                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4144                      desc_lookup(desc), desc, time, blink1, blink2,
4145                      ilink1, ilink2, data1);
4146         }
4147
4148         iwl3945_release_nic_access(priv);
4149
4150 }
4151
4152 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4153
4154 /**
4155  * iwl3945_print_event_log - Dump error event log to syslog
4156  *
4157  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4158  */
4159 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4160                                 u32 num_events, u32 mode)
4161 {
4162         u32 i;
4163         u32 base;       /* SRAM byte address of event log header */
4164         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4165         u32 ptr;        /* SRAM byte address of log data */
4166         u32 ev, time, data; /* event log data */
4167
4168         if (num_events == 0)
4169                 return;
4170
4171         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4172
4173         if (mode == 0)
4174                 event_size = 2 * sizeof(u32);
4175         else
4176                 event_size = 3 * sizeof(u32);
4177
4178         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4179
4180         /* "time" is actually "data" for mode 0 (no timestamp).
4181          * place event id # at far right for easier visual parsing. */
4182         for (i = 0; i < num_events; i++) {
4183                 ev = iwl3945_read_targ_mem(priv, ptr);
4184                 ptr += sizeof(u32);
4185                 time = iwl3945_read_targ_mem(priv, ptr);
4186                 ptr += sizeof(u32);
4187                 if (mode == 0)
4188                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4189                 else {
4190                         data = iwl3945_read_targ_mem(priv, ptr);
4191                         ptr += sizeof(u32);
4192                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4193                 }
4194         }
4195 }
4196
4197 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4198 {
4199         int rc;
4200         u32 base;       /* SRAM byte address of event log header */
4201         u32 capacity;   /* event log capacity in # entries */
4202         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4203         u32 num_wraps;  /* # times uCode wrapped to top of log */
4204         u32 next_entry; /* index of next entry to be written by uCode */
4205         u32 size;       /* # entries that we'll print */
4206
4207         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4208         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4209                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4210                 return;
4211         }
4212
4213         rc = iwl3945_grab_nic_access(priv);
4214         if (rc) {
4215                 IWL_WARNING("Can not read from adapter at this time.\n");
4216                 return;
4217         }
4218
4219         /* event log header */
4220         capacity = iwl3945_read_targ_mem(priv, base);
4221         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4222         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4223         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4224
4225         size = num_wraps ? capacity : next_entry;
4226
4227         /* bail out if nothing in log */
4228         if (size == 0) {
4229                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4230                 iwl3945_release_nic_access(priv);
4231                 return;
4232         }
4233
4234         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4235                   size, num_wraps);
4236
4237         /* if uCode has wrapped back to top of log, start at the oldest entry,
4238          * i.e the next one that uCode would fill. */
4239         if (num_wraps)
4240                 iwl3945_print_event_log(priv, next_entry,
4241                                     capacity - next_entry, mode);
4242
4243         /* (then/else) start at top of log */
4244         iwl3945_print_event_log(priv, 0, next_entry, mode);
4245
4246         iwl3945_release_nic_access(priv);
4247 }
4248
4249 /**
4250  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4251  */
4252 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4253 {
4254         /* Set the FW error flag -- cleared on iwl3945_down */
4255         set_bit(STATUS_FW_ERROR, &priv->status);
4256
4257         /* Cancel currently queued command. */
4258         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4259
4260 #ifdef CONFIG_IWL3945_DEBUG
4261         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4262                 iwl3945_dump_nic_error_log(priv);
4263                 iwl3945_dump_nic_event_log(priv);
4264                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4265         }
4266 #endif
4267
4268         wake_up_interruptible(&priv->wait_command_queue);
4269
4270         /* Keep the restart process from trying to send host
4271          * commands by clearing the INIT status bit */
4272         clear_bit(STATUS_READY, &priv->status);
4273
4274         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4275                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4276                           "Restarting adapter due to uCode error.\n");
4277
4278                 if (iwl3945_is_associated(priv)) {
4279                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4280                                sizeof(priv->recovery_rxon));
4281                         priv->error_recovering = 1;
4282                 }
4283                 queue_work(priv->workqueue, &priv->restart);
4284         }
4285 }
4286
4287 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4288 {
4289         unsigned long flags;
4290
4291         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4292                sizeof(priv->staging_rxon));
4293         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4294         iwl3945_commit_rxon(priv);
4295
4296         iwl3945_add_station(priv, priv->bssid, 1, 0);
4297
4298         spin_lock_irqsave(&priv->lock, flags);
4299         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4300         priv->error_recovering = 0;
4301         spin_unlock_irqrestore(&priv->lock, flags);
4302 }
4303
4304 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4305 {
4306         u32 inta, handled = 0;
4307         u32 inta_fh;
4308         unsigned long flags;
4309 #ifdef CONFIG_IWL3945_DEBUG
4310         u32 inta_mask;
4311 #endif
4312
4313         spin_lock_irqsave(&priv->lock, flags);
4314
4315         /* Ack/clear/reset pending uCode interrupts.
4316          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4317          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4318         inta = iwl3945_read32(priv, CSR_INT);
4319         iwl3945_write32(priv, CSR_INT, inta);
4320
4321         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4322          * Any new interrupts that happen after this, either while we're
4323          * in this tasklet, or later, will show up in next ISR/tasklet. */
4324         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4325         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4326
4327 #ifdef CONFIG_IWL3945_DEBUG
4328         if (iwl3945_debug_level & IWL_DL_ISR) {
4329                 /* just for debug */
4330                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4331                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4332                               inta, inta_mask, inta_fh);
4333         }
4334 #endif
4335
4336         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4337          * atomic, make sure that inta covers all the interrupts that
4338          * we've discovered, even if FH interrupt came in just after
4339          * reading CSR_INT. */
4340         if (inta_fh & CSR39_FH_INT_RX_MASK)
4341                 inta |= CSR_INT_BIT_FH_RX;
4342         if (inta_fh & CSR39_FH_INT_TX_MASK)
4343                 inta |= CSR_INT_BIT_FH_TX;
4344
4345         /* Now service all interrupt bits discovered above. */
4346         if (inta & CSR_INT_BIT_HW_ERR) {
4347                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4348
4349                 /* Tell the device to stop sending interrupts */
4350                 iwl3945_disable_interrupts(priv);
4351
4352                 iwl3945_irq_handle_error(priv);
4353
4354                 handled |= CSR_INT_BIT_HW_ERR;
4355
4356                 spin_unlock_irqrestore(&priv->lock, flags);
4357
4358                 return;
4359         }
4360
4361 #ifdef CONFIG_IWL3945_DEBUG
4362         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4363                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4364                 if (inta & CSR_INT_BIT_SCD)
4365                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4366                                       "the frame/frames.\n");
4367
4368                 /* Alive notification via Rx interrupt will do the real work */
4369                 if (inta & CSR_INT_BIT_ALIVE)
4370                         IWL_DEBUG_ISR("Alive interrupt\n");
4371         }
4372 #endif
4373         /* Safely ignore these bits for debug checks below */
4374         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4375
4376         /* HW RF KILL switch toggled (4965 only) */
4377         if (inta & CSR_INT_BIT_RF_KILL) {
4378                 int hw_rf_kill = 0;
4379                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4380                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4381                         hw_rf_kill = 1;
4382
4383                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4384                                 "RF_KILL bit toggled to %s.\n",
4385                                 hw_rf_kill ? "disable radio":"enable radio");
4386
4387                 /* Queue restart only if RF_KILL switch was set to "kill"
4388                  *   when we loaded driver, and is now set to "enable".
4389                  * After we're Alive, RF_KILL gets handled by
4390                  *   iwl3945_rx_card_state_notif() */
4391                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4392                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4393                         queue_work(priv->workqueue, &priv->restart);
4394                 }
4395
4396                 handled |= CSR_INT_BIT_RF_KILL;
4397         }
4398
4399         /* Chip got too hot and stopped itself (4965 only) */
4400         if (inta & CSR_INT_BIT_CT_KILL) {
4401                 IWL_ERROR("Microcode CT kill error detected.\n");
4402                 handled |= CSR_INT_BIT_CT_KILL;
4403         }
4404
4405         /* Error detected by uCode */
4406         if (inta & CSR_INT_BIT_SW_ERR) {
4407                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4408                           inta);
4409                 iwl3945_irq_handle_error(priv);
4410                 handled |= CSR_INT_BIT_SW_ERR;
4411         }
4412
4413         /* uCode wakes up after power-down sleep */
4414         if (inta & CSR_INT_BIT_WAKEUP) {
4415                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4416                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4417                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4418                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4419                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4420                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4421                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4422                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4423
4424                 handled |= CSR_INT_BIT_WAKEUP;
4425         }
4426
4427         /* All uCode command responses, including Tx command responses,
4428          * Rx "responses" (frame-received notification), and other
4429          * notifications from uCode come through here*/
4430         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4431                 iwl3945_rx_handle(priv);
4432                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4433         }
4434
4435         if (inta & CSR_INT_BIT_FH_TX) {
4436                 IWL_DEBUG_ISR("Tx interrupt\n");
4437
4438                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4439                 if (!iwl3945_grab_nic_access(priv)) {
4440                         iwl3945_write_direct32(priv,
4441                                              FH_TCSR_CREDIT
4442                                              (ALM_FH_SRVC_CHNL), 0x0);
4443                         iwl3945_release_nic_access(priv);
4444                 }
4445                 handled |= CSR_INT_BIT_FH_TX;
4446         }
4447
4448         if (inta & ~handled)
4449                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4450
4451         if (inta & ~CSR_INI_SET_MASK) {
4452                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4453                          inta & ~CSR_INI_SET_MASK);
4454                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4455         }
4456
4457         /* Re-enable all interrupts */
4458         /* only Re-enable if disabled by irq */
4459         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4460                 iwl3945_enable_interrupts(priv);
4461
4462 #ifdef CONFIG_IWL3945_DEBUG
4463         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4464                 inta = iwl3945_read32(priv, CSR_INT);
4465                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4466                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4467                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4468                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4469         }
4470 #endif
4471         spin_unlock_irqrestore(&priv->lock, flags);
4472 }
4473
4474 static irqreturn_t iwl3945_isr(int irq, void *data)
4475 {
4476         struct iwl3945_priv *priv = data;
4477         u32 inta, inta_mask;
4478         u32 inta_fh;
4479         if (!priv)
4480                 return IRQ_NONE;
4481
4482         spin_lock(&priv->lock);
4483
4484         /* Disable (but don't clear!) interrupts here to avoid
4485          *    back-to-back ISRs and sporadic interrupts from our NIC.
4486          * If we have something to service, the tasklet will re-enable ints.
4487          * If we *don't* have something, we'll re-enable before leaving here. */
4488         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4489         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4490
4491         /* Discover which interrupts are active/pending */
4492         inta = iwl3945_read32(priv, CSR_INT);
4493         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4494
4495         /* Ignore interrupt if there's nothing in NIC to service.
4496          * This may be due to IRQ shared with another device,
4497          * or due to sporadic interrupts thrown from our NIC. */
4498         if (!inta && !inta_fh) {
4499                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4500                 goto none;
4501         }
4502
4503         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4504                 /* Hardware disappeared */
4505                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4506                 goto unplugged;
4507         }
4508
4509         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4510                       inta, inta_mask, inta_fh);
4511
4512         inta &= ~CSR_INT_BIT_SCD;
4513
4514         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4515         if (likely(inta || inta_fh))
4516                 tasklet_schedule(&priv->irq_tasklet);
4517 unplugged:
4518         spin_unlock(&priv->lock);
4519
4520         return IRQ_HANDLED;
4521
4522  none:
4523         /* re-enable interrupts here since we don't have anything to service. */
4524         /* only Re-enable if disabled by irq */
4525         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4526                 iwl3945_enable_interrupts(priv);
4527         spin_unlock(&priv->lock);
4528         return IRQ_NONE;
4529 }
4530
4531 /************************** EEPROM BANDS ****************************
4532  *
4533  * The iwl3945_eeprom_band definitions below provide the mapping from the
4534  * EEPROM contents to the specific channel number supported for each
4535  * band.
4536  *
4537  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4538  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4539  * The specific geography and calibration information for that channel
4540  * is contained in the eeprom map itself.
4541  *
4542  * During init, we copy the eeprom information and channel map
4543  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4544  *
4545  * channel_map_24/52 provides the index in the channel_info array for a
4546  * given channel.  We have to have two separate maps as there is channel
4547  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4548  * band_2
4549  *
4550  * A value of 0xff stored in the channel_map indicates that the channel
4551  * is not supported by the hardware at all.
4552  *
4553  * A value of 0xfe in the channel_map indicates that the channel is not
4554  * valid for Tx with the current hardware.  This means that
4555  * while the system can tune and receive on a given channel, it may not
4556  * be able to associate or transmit any frames on that
4557  * channel.  There is no corresponding channel information for that
4558  * entry.
4559  *
4560  *********************************************************************/
4561
4562 /* 2.4 GHz */
4563 static const u8 iwl3945_eeprom_band_1[14] = {
4564         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4565 };
4566
4567 /* 5.2 GHz bands */
4568 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4569         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4570 };
4571
4572 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4573         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4574 };
4575
4576 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4577         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4578 };
4579
4580 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4581         145, 149, 153, 157, 161, 165
4582 };
4583
4584 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4585                                     int *eeprom_ch_count,
4586                                     const struct iwl3945_eeprom_channel
4587                                     **eeprom_ch_info,
4588                                     const u8 **eeprom_ch_index)
4589 {
4590         switch (band) {
4591         case 1:         /* 2.4GHz band */
4592                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4593                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4594                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4595                 break;
4596         case 2:         /* 4.9GHz band */
4597                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4598                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4599                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4600                 break;
4601         case 3:         /* 5.2GHz band */
4602                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4603                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4604                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4605                 break;
4606         case 4:         /* 5.5GHz band */
4607                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4608                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4609                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4610                 break;
4611         case 5:         /* 5.7GHz band */
4612                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4613                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4614                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4615                 break;
4616         default:
4617                 BUG();
4618                 return;
4619         }
4620 }
4621
4622 /**
4623  * iwl3945_get_channel_info - Find driver's private channel info
4624  *
4625  * Based on band and channel number.
4626  */
4627 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4628                                                     enum ieee80211_band band, u16 channel)
4629 {
4630         int i;
4631
4632         switch (band) {
4633         case IEEE80211_BAND_5GHZ:
4634                 for (i = 14; i < priv->channel_count; i++) {
4635                         if (priv->channel_info[i].channel == channel)
4636                                 return &priv->channel_info[i];
4637                 }
4638                 break;
4639
4640         case IEEE80211_BAND_2GHZ:
4641                 if (channel >= 1 && channel <= 14)
4642                         return &priv->channel_info[channel - 1];
4643                 break;
4644         case IEEE80211_NUM_BANDS:
4645                 WARN_ON(1);
4646         }
4647
4648         return NULL;
4649 }
4650
4651 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4652                             ? # x " " : "")
4653
4654 /**
4655  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4656  */
4657 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4658 {
4659         int eeprom_ch_count = 0;
4660         const u8 *eeprom_ch_index = NULL;
4661         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4662         int band, ch;
4663         struct iwl3945_channel_info *ch_info;
4664
4665         if (priv->channel_count) {
4666                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4667                 return 0;
4668         }
4669
4670         if (priv->eeprom.version < 0x2f) {
4671                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4672                             priv->eeprom.version);
4673                 return -EINVAL;
4674         }
4675
4676         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4677
4678         priv->channel_count =
4679             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4680             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4681             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4682             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4683             ARRAY_SIZE(iwl3945_eeprom_band_5);
4684
4685         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4686
4687         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4688                                      priv->channel_count, GFP_KERNEL);
4689         if (!priv->channel_info) {
4690                 IWL_ERROR("Could not allocate channel_info\n");
4691                 priv->channel_count = 0;
4692                 return -ENOMEM;
4693         }
4694
4695         ch_info = priv->channel_info;
4696
4697         /* Loop through the 5 EEPROM bands adding them in order to the
4698          * channel map we maintain (that contains additional information than
4699          * what just in the EEPROM) */
4700         for (band = 1; band <= 5; band++) {
4701
4702                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4703                                         &eeprom_ch_info, &eeprom_ch_index);
4704
4705                 /* Loop through each band adding each of the channels */
4706                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4707                         ch_info->channel = eeprom_ch_index[ch];
4708                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4709                             IEEE80211_BAND_5GHZ;
4710
4711                         /* permanently store EEPROM's channel regulatory flags
4712                          *   and max power in channel info database. */
4713                         ch_info->eeprom = eeprom_ch_info[ch];
4714
4715                         /* Copy the run-time flags so they are there even on
4716                          * invalid channels */
4717                         ch_info->flags = eeprom_ch_info[ch].flags;
4718
4719                         if (!(is_channel_valid(ch_info))) {
4720                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4721                                                "No traffic\n",
4722                                                ch_info->channel,
4723                                                ch_info->flags,
4724                                                is_channel_a_band(ch_info) ?
4725                                                "5.2" : "2.4");
4726                                 ch_info++;
4727                                 continue;
4728                         }
4729
4730                         /* Initialize regulatory-based run-time data */
4731                         ch_info->max_power_avg = ch_info->curr_txpow =
4732                             eeprom_ch_info[ch].max_power_avg;
4733                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4734                         ch_info->min_power = 0;
4735
4736                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
4737                                        " %ddBm): Ad-Hoc %ssupported\n",
4738                                        ch_info->channel,
4739                                        is_channel_a_band(ch_info) ?
4740                                        "5.2" : "2.4",
4741                                        CHECK_AND_PRINT(VALID),
4742                                        CHECK_AND_PRINT(IBSS),
4743                                        CHECK_AND_PRINT(ACTIVE),
4744                                        CHECK_AND_PRINT(RADAR),
4745                                        CHECK_AND_PRINT(WIDE),
4746                                        CHECK_AND_PRINT(DFS),
4747                                        eeprom_ch_info[ch].flags,
4748                                        eeprom_ch_info[ch].max_power_avg,
4749                                        ((eeprom_ch_info[ch].
4750                                          flags & EEPROM_CHANNEL_IBSS)
4751                                         && !(eeprom_ch_info[ch].
4752                                              flags & EEPROM_CHANNEL_RADAR))
4753                                        ? "" : "not ");
4754
4755                         /* Set the user_txpower_limit to the highest power
4756                          * supported by any channel */
4757                         if (eeprom_ch_info[ch].max_power_avg >
4758                             priv->user_txpower_limit)
4759                                 priv->user_txpower_limit =
4760                                     eeprom_ch_info[ch].max_power_avg;
4761
4762                         ch_info++;
4763                 }
4764         }
4765
4766         /* Set up txpower settings in driver for all channels */
4767         if (iwl3945_txpower_set_from_eeprom(priv))
4768                 return -EIO;
4769
4770         return 0;
4771 }
4772
4773 /*
4774  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4775  */
4776 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4777 {
4778         kfree(priv->channel_info);
4779         priv->channel_count = 0;
4780 }
4781
4782 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4783  * sending probe req.  This should be set long enough to hear probe responses
4784  * from more than one AP.  */
4785 #define IWL_ACTIVE_DWELL_TIME_24    (30)        /* all times in msec */
4786 #define IWL_ACTIVE_DWELL_TIME_52    (20)
4787
4788 #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
4789 #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
4790
4791 /* For faster active scanning, scan will move to the next channel if fewer than
4792  * PLCP_QUIET_THRESH packets are heard on this channel within
4793  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4794  * time if it's a quiet channel (nothing responded to our probe, and there's
4795  * no other traffic).
4796  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4797 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4798 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(10)  /* msec */
4799
4800 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4801  * Must be set longer than active dwell time.
4802  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4803 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4804 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4805 #define IWL_PASSIVE_DWELL_BASE      (100)
4806 #define IWL_CHANNEL_TUNE_TIME       5
4807
4808 #define IWL_SCAN_PROBE_MASK(n)   cpu_to_le32((BIT(n) | (BIT(n) - BIT(1))))
4809
4810 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4811                                                 enum ieee80211_band band,
4812                                                 u8 n_probes)
4813 {
4814         if (band == IEEE80211_BAND_5GHZ)
4815                 return IWL_ACTIVE_DWELL_TIME_52 +
4816                         IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
4817         else
4818                 return IWL_ACTIVE_DWELL_TIME_24 +
4819                         IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
4820 }
4821
4822 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4823                                           enum ieee80211_band band)
4824 {
4825         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4826             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4827             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4828
4829         if (iwl3945_is_associated(priv)) {
4830                 /* If we're associated, we clamp the maximum passive
4831                  * dwell time to be 98% of the beacon interval (minus
4832                  * 2 * channel tune time) */
4833                 passive = priv->beacon_int;
4834                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4835                         passive = IWL_PASSIVE_DWELL_BASE;
4836                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4837         }
4838
4839         return passive;
4840 }
4841
4842 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4843                                          enum ieee80211_band band,
4844                                      u8 is_active, u8 n_probes,
4845                                      struct iwl3945_scan_channel *scan_ch)
4846 {
4847         const struct ieee80211_channel *channels = NULL;
4848         const struct ieee80211_supported_band *sband;
4849         const struct iwl3945_channel_info *ch_info;
4850         u16 passive_dwell = 0;
4851         u16 active_dwell = 0;
4852         int added, i;
4853
4854         sband = iwl3945_get_band(priv, band);
4855         if (!sband)
4856                 return 0;
4857
4858         channels = sband->channels;
4859
4860         active_dwell = iwl3945_get_active_dwell_time(priv, band, n_probes);
4861         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4862
4863         if (passive_dwell <= active_dwell)
4864                 passive_dwell = active_dwell + 1;
4865
4866         for (i = 0, added = 0; i < sband->n_channels; i++) {
4867                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4868                         continue;
4869
4870                 scan_ch->channel = channels[i].hw_value;
4871
4872                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4873                 if (!is_channel_valid(ch_info)) {
4874                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
4875                                        scan_ch->channel);
4876                         continue;
4877                 }
4878
4879                 if (!is_active || is_channel_passive(ch_info) ||
4880                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4881                         scan_ch->type = 0;      /* passive */
4882                 else
4883                         scan_ch->type = 1;      /* active */
4884
4885                 if ((scan_ch->type & 1) && n_probes)
4886                         scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4887
4888                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4889                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4890
4891                 /* Set txpower levels to defaults */
4892                 scan_ch->tpc.dsp_atten = 110;
4893                 /* scan_pwr_info->tpc.dsp_atten; */
4894
4895                 /*scan_pwr_info->tpc.tx_gain; */
4896                 if (band == IEEE80211_BAND_5GHZ)
4897                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4898                 else {
4899                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4900                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4901                          * power level:
4902                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4903                          */
4904                 }
4905
4906                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4907                                scan_ch->channel,
4908                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4909                                (scan_ch->type & 1) ?
4910                                active_dwell : passive_dwell);
4911
4912                 scan_ch++;
4913                 added++;
4914         }
4915
4916         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4917         return added;
4918 }
4919
4920 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
4921                               struct ieee80211_rate *rates)
4922 {
4923         int i;
4924
4925         for (i = 0; i < IWL_RATE_COUNT; i++) {
4926                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
4927                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4928                 rates[i].hw_value_short = i;
4929                 rates[i].flags = 0;
4930                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4931                         /*
4932                          * If CCK != 1M then set short preamble rate flag.
4933                          */
4934                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
4935                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4936                 }
4937         }
4938 }
4939
4940 /**
4941  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
4942  */
4943 static int iwl3945_init_geos(struct iwl3945_priv *priv)
4944 {
4945         struct iwl3945_channel_info *ch;
4946         struct ieee80211_supported_band *sband;
4947         struct ieee80211_channel *channels;
4948         struct ieee80211_channel *geo_ch;
4949         struct ieee80211_rate *rates;
4950         int i = 0;
4951
4952         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4953             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4954                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4955                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4956                 return 0;
4957         }
4958
4959         channels = kzalloc(sizeof(struct ieee80211_channel) *
4960                            priv->channel_count, GFP_KERNEL);
4961         if (!channels)
4962                 return -ENOMEM;
4963
4964         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4965                         GFP_KERNEL);
4966         if (!rates) {
4967                 kfree(channels);
4968                 return -ENOMEM;
4969         }
4970
4971         /* 5.2GHz channels start after the 2.4GHz channels */
4972         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4973         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
4974         /* just OFDM */
4975         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4976         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4977
4978         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4979         sband->channels = channels;
4980         /* OFDM & CCK */
4981         sband->bitrates = rates;
4982         sband->n_bitrates = IWL_RATE_COUNT;
4983
4984         priv->ieee_channels = channels;
4985         priv->ieee_rates = rates;
4986
4987         iwl3945_init_hw_rates(priv, rates);
4988
4989         for (i = 0;  i < priv->channel_count; i++) {
4990                 ch = &priv->channel_info[i];
4991
4992                 /* FIXME: might be removed if scan is OK*/
4993                 if (!is_channel_valid(ch))
4994                         continue;
4995
4996                 if (is_channel_a_band(ch))
4997                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4998                 else
4999                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5000
5001                 geo_ch = &sband->channels[sband->n_channels++];
5002
5003                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5004                 geo_ch->max_power = ch->max_power_avg;
5005                 geo_ch->max_antenna_gain = 0xff;
5006                 geo_ch->hw_value = ch->channel;
5007
5008                 if (is_channel_valid(ch)) {
5009                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5010                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5011
5012                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5013                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5014
5015                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5016                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5017
5018                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5019                                 priv->max_channel_txpower_limit =
5020                                     ch->max_power_avg;
5021                 } else {
5022                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5023                 }
5024
5025                 /* Save flags for reg domain usage */
5026                 geo_ch->orig_flags = geo_ch->flags;
5027
5028                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5029                                 ch->channel, geo_ch->center_freq,
5030                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5031                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5032                                 "restricted" : "valid",
5033                                  geo_ch->flags);
5034         }
5035
5036         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5037              priv->cfg->sku & IWL_SKU_A) {
5038                 printk(KERN_INFO DRV_NAME
5039                        ": Incorrectly detected BG card as ABG.  Please send "
5040                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5041                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5042                  priv->cfg->sku &= ~IWL_SKU_A;
5043         }
5044
5045         printk(KERN_INFO DRV_NAME
5046                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5047                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5048                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5049
5050         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5051                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5052                         &priv->bands[IEEE80211_BAND_2GHZ];
5053         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5054                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5055                         &priv->bands[IEEE80211_BAND_5GHZ];
5056
5057         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5058
5059         return 0;
5060 }
5061
5062 /*
5063  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5064  */
5065 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5066 {
5067         kfree(priv->ieee_channels);
5068         kfree(priv->ieee_rates);
5069         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5070 }
5071
5072 /******************************************************************************
5073  *
5074  * uCode download functions
5075  *
5076  ******************************************************************************/
5077
5078 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5079 {
5080         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5081         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5082         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5083         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5084         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5085         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5086 }
5087
5088 /**
5089  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5090  *     looking at all data.
5091  */
5092 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 *image, u32 len)
5093 {
5094         u32 val;
5095         u32 save_len = len;
5096         int rc = 0;
5097         u32 errcnt;
5098
5099         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5100
5101         rc = iwl3945_grab_nic_access(priv);
5102         if (rc)
5103                 return rc;
5104
5105         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5106
5107         errcnt = 0;
5108         for (; len > 0; len -= sizeof(u32), image++) {
5109                 /* read data comes through single port, auto-incr addr */
5110                 /* NOTE: Use the debugless read so we don't flood kernel log
5111                  * if IWL_DL_IO is set */
5112                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5113                 if (val != le32_to_cpu(*image)) {
5114                         IWL_ERROR("uCode INST section is invalid at "
5115                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5116                                   save_len - len, val, le32_to_cpu(*image));
5117                         rc = -EIO;
5118                         errcnt++;
5119                         if (errcnt >= 20)
5120                                 break;
5121                 }
5122         }
5123
5124         iwl3945_release_nic_access(priv);
5125
5126         if (!errcnt)
5127                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5128
5129         return rc;
5130 }
5131
5132
5133 /**
5134  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5135  *   using sample data 100 bytes apart.  If these sample points are good,
5136  *   it's a pretty good bet that everything between them is good, too.
5137  */
5138 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5139 {
5140         u32 val;
5141         int rc = 0;
5142         u32 errcnt = 0;
5143         u32 i;
5144
5145         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5146
5147         rc = iwl3945_grab_nic_access(priv);
5148         if (rc)
5149                 return rc;
5150
5151         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5152                 /* read data comes through single port, auto-incr addr */
5153                 /* NOTE: Use the debugless read so we don't flood kernel log
5154                  * if IWL_DL_IO is set */
5155                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5156                         i + RTC_INST_LOWER_BOUND);
5157                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5158                 if (val != le32_to_cpu(*image)) {
5159 #if 0 /* Enable this if you want to see details */
5160                         IWL_ERROR("uCode INST section is invalid at "
5161                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5162                                   i, val, *image);
5163 #endif
5164                         rc = -EIO;
5165                         errcnt++;
5166                         if (errcnt >= 3)
5167                                 break;
5168                 }
5169         }
5170
5171         iwl3945_release_nic_access(priv);
5172
5173         return rc;
5174 }
5175
5176
5177 /**
5178  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5179  *    and verify its contents
5180  */
5181 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5182 {
5183         __le32 *image;
5184         u32 len;
5185         int rc = 0;
5186
5187         /* Try bootstrap */
5188         image = (__le32 *)priv->ucode_boot.v_addr;
5189         len = priv->ucode_boot.len;
5190         rc = iwl3945_verify_inst_sparse(priv, image, len);
5191         if (rc == 0) {
5192                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5193                 return 0;
5194         }
5195
5196         /* Try initialize */
5197         image = (__le32 *)priv->ucode_init.v_addr;
5198         len = priv->ucode_init.len;
5199         rc = iwl3945_verify_inst_sparse(priv, image, len);
5200         if (rc == 0) {
5201                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5202                 return 0;
5203         }
5204
5205         /* Try runtime/protocol */
5206         image = (__le32 *)priv->ucode_code.v_addr;
5207         len = priv->ucode_code.len;
5208         rc = iwl3945_verify_inst_sparse(priv, image, len);
5209         if (rc == 0) {
5210                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5211                 return 0;
5212         }
5213
5214         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5215
5216         /* Since nothing seems to match, show first several data entries in
5217          * instruction SRAM, so maybe visual inspection will give a clue.
5218          * Selection of bootstrap image (vs. other images) is arbitrary. */
5219         image = (__le32 *)priv->ucode_boot.v_addr;
5220         len = priv->ucode_boot.len;
5221         rc = iwl3945_verify_inst_full(priv, image, len);
5222
5223         return rc;
5224 }
5225
5226
5227 /* check contents of special bootstrap uCode SRAM */
5228 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5229 {
5230         __le32 *image = priv->ucode_boot.v_addr;
5231         u32 len = priv->ucode_boot.len;
5232         u32 reg;
5233         u32 val;
5234
5235         IWL_DEBUG_INFO("Begin verify bsm\n");
5236
5237         /* verify BSM SRAM contents */
5238         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5239         for (reg = BSM_SRAM_LOWER_BOUND;
5240              reg < BSM_SRAM_LOWER_BOUND + len;
5241              reg += sizeof(u32), image++) {
5242                 val = iwl3945_read_prph(priv, reg);
5243                 if (val != le32_to_cpu(*image)) {
5244                         IWL_ERROR("BSM uCode verification failed at "
5245                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5246                                   BSM_SRAM_LOWER_BOUND,
5247                                   reg - BSM_SRAM_LOWER_BOUND, len,
5248                                   val, le32_to_cpu(*image));
5249                         return -EIO;
5250                 }
5251         }
5252
5253         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5254
5255         return 0;
5256 }
5257
5258 /**
5259  * iwl3945_load_bsm - Load bootstrap instructions
5260  *
5261  * BSM operation:
5262  *
5263  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5264  * in special SRAM that does not power down during RFKILL.  When powering back
5265  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5266  * the bootstrap program into the on-board processor, and starts it.
5267  *
5268  * The bootstrap program loads (via DMA) instructions and data for a new
5269  * program from host DRAM locations indicated by the host driver in the
5270  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5271  * automatically.
5272  *
5273  * When initializing the NIC, the host driver points the BSM to the
5274  * "initialize" uCode image.  This uCode sets up some internal data, then
5275  * notifies host via "initialize alive" that it is complete.
5276  *
5277  * The host then replaces the BSM_DRAM_* pointer values to point to the
5278  * normal runtime uCode instructions and a backup uCode data cache buffer
5279  * (filled initially with starting data values for the on-board processor),
5280  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5281  * which begins normal operation.
5282  *
5283  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5284  * the backup data cache in DRAM before SRAM is powered down.
5285  *
5286  * When powering back up, the BSM loads the bootstrap program.  This reloads
5287  * the runtime uCode instructions and the backup data cache into SRAM,
5288  * and re-launches the runtime uCode from where it left off.
5289  */
5290 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5291 {
5292         __le32 *image = priv->ucode_boot.v_addr;
5293         u32 len = priv->ucode_boot.len;
5294         dma_addr_t pinst;
5295         dma_addr_t pdata;
5296         u32 inst_len;
5297         u32 data_len;
5298         int rc;
5299         int i;
5300         u32 done;
5301         u32 reg_offset;
5302
5303         IWL_DEBUG_INFO("Begin load bsm\n");
5304
5305         /* make sure bootstrap program is no larger than BSM's SRAM size */
5306         if (len > IWL_MAX_BSM_SIZE)
5307                 return -EINVAL;
5308
5309         /* Tell bootstrap uCode where to find the "Initialize" uCode
5310          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5311          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5312          *        after the "initialize" uCode has run, to point to
5313          *        runtime/protocol instructions and backup data cache. */
5314         pinst = priv->ucode_init.p_addr;
5315         pdata = priv->ucode_init_data.p_addr;
5316         inst_len = priv->ucode_init.len;
5317         data_len = priv->ucode_init_data.len;
5318
5319         rc = iwl3945_grab_nic_access(priv);
5320         if (rc)
5321                 return rc;
5322
5323         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5324         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5325         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5326         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5327
5328         /* Fill BSM memory with bootstrap instructions */
5329         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5330              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5331              reg_offset += sizeof(u32), image++)
5332                 _iwl3945_write_prph(priv, reg_offset,
5333                                           le32_to_cpu(*image));
5334
5335         rc = iwl3945_verify_bsm(priv);
5336         if (rc) {
5337                 iwl3945_release_nic_access(priv);
5338                 return rc;
5339         }
5340
5341         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5342         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5343         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5344                                  RTC_INST_LOWER_BOUND);
5345         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5346
5347         /* Load bootstrap code into instruction SRAM now,
5348          *   to prepare to load "initialize" uCode */
5349         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5350                 BSM_WR_CTRL_REG_BIT_START);
5351
5352         /* Wait for load of bootstrap uCode to finish */
5353         for (i = 0; i < 100; i++) {
5354                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5355                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5356                         break;
5357                 udelay(10);
5358         }
5359         if (i < 100)
5360                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5361         else {
5362                 IWL_ERROR("BSM write did not complete!\n");
5363                 return -EIO;
5364         }
5365
5366         /* Enable future boot loads whenever power management unit triggers it
5367          *   (e.g. when powering back up after power-save shutdown) */
5368         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5369                 BSM_WR_CTRL_REG_BIT_START_EN);
5370
5371         iwl3945_release_nic_access(priv);
5372
5373         return 0;
5374 }
5375
5376 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5377 {
5378         /* Remove all resets to allow NIC to operate */
5379         iwl3945_write32(priv, CSR_RESET, 0);
5380 }
5381
5382 /**
5383  * iwl3945_read_ucode - Read uCode images from disk file.
5384  *
5385  * Copy into buffers for card to fetch via bus-mastering
5386  */
5387 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5388 {
5389         struct iwl3945_ucode *ucode;
5390         int ret = 0;
5391         const struct firmware *ucode_raw;
5392         /* firmware file name contains uCode/driver compatibility version */
5393         const char *name = priv->cfg->fw_name;
5394         u8 *src;
5395         size_t len;
5396         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5397
5398         /* Ask kernel firmware_class module to get the boot firmware off disk.
5399          * request_firmware() is synchronous, file is in memory on return. */
5400         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5401         if (ret < 0) {
5402                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5403                                 name, ret);
5404                 goto error;
5405         }
5406
5407         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5408                        name, ucode_raw->size);
5409
5410         /* Make sure that we got at least our header! */
5411         if (ucode_raw->size < sizeof(*ucode)) {
5412                 IWL_ERROR("File size way too small!\n");
5413                 ret = -EINVAL;
5414                 goto err_release;
5415         }
5416
5417         /* Data from ucode file:  header followed by uCode images */
5418         ucode = (void *)ucode_raw->data;
5419
5420         ver = le32_to_cpu(ucode->ver);
5421         inst_size = le32_to_cpu(ucode->inst_size);
5422         data_size = le32_to_cpu(ucode->data_size);
5423         init_size = le32_to_cpu(ucode->init_size);
5424         init_data_size = le32_to_cpu(ucode->init_data_size);
5425         boot_size = le32_to_cpu(ucode->boot_size);
5426
5427         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5428         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5429         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5430         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5431         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5432         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5433
5434         /* Verify size of file vs. image size info in file's header */
5435         if (ucode_raw->size < sizeof(*ucode) +
5436                 inst_size + data_size + init_size +
5437                 init_data_size + boot_size) {
5438
5439                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5440                                (int)ucode_raw->size);
5441                 ret = -EINVAL;
5442                 goto err_release;
5443         }
5444
5445         /* Verify that uCode images will fit in card's SRAM */
5446         if (inst_size > IWL_MAX_INST_SIZE) {
5447                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5448                                inst_size);
5449                 ret = -EINVAL;
5450                 goto err_release;
5451         }
5452
5453         if (data_size > IWL_MAX_DATA_SIZE) {
5454                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5455                                data_size);
5456                 ret = -EINVAL;
5457                 goto err_release;
5458         }
5459         if (init_size > IWL_MAX_INST_SIZE) {
5460                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5461                                 init_size);
5462                 ret = -EINVAL;
5463                 goto err_release;
5464         }
5465         if (init_data_size > IWL_MAX_DATA_SIZE) {
5466                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5467                                 init_data_size);
5468                 ret = -EINVAL;
5469                 goto err_release;
5470         }
5471         if (boot_size > IWL_MAX_BSM_SIZE) {
5472                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5473                                 boot_size);
5474                 ret = -EINVAL;
5475                 goto err_release;
5476         }
5477
5478         /* Allocate ucode buffers for card's bus-master loading ... */
5479
5480         /* Runtime instructions and 2 copies of data:
5481          * 1) unmodified from disk
5482          * 2) backup cache for save/restore during power-downs */
5483         priv->ucode_code.len = inst_size;
5484         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5485
5486         priv->ucode_data.len = data_size;
5487         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5488
5489         priv->ucode_data_backup.len = data_size;
5490         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5491
5492         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5493             !priv->ucode_data_backup.v_addr)
5494                 goto err_pci_alloc;
5495
5496         /* Initialization instructions and data */
5497         if (init_size && init_data_size) {
5498                 priv->ucode_init.len = init_size;
5499                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5500
5501                 priv->ucode_init_data.len = init_data_size;
5502                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5503
5504                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5505                         goto err_pci_alloc;
5506         }
5507
5508         /* Bootstrap (instructions only, no data) */
5509         if (boot_size) {
5510                 priv->ucode_boot.len = boot_size;
5511                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5512
5513                 if (!priv->ucode_boot.v_addr)
5514                         goto err_pci_alloc;
5515         }
5516
5517         /* Copy images into buffers for card's bus-master reads ... */
5518
5519         /* Runtime instructions (first block of data in file) */
5520         src = &ucode->data[0];
5521         len = priv->ucode_code.len;
5522         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5523         memcpy(priv->ucode_code.v_addr, src, len);
5524         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5525                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5526
5527         /* Runtime data (2nd block)
5528          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5529         src = &ucode->data[inst_size];
5530         len = priv->ucode_data.len;
5531         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5532         memcpy(priv->ucode_data.v_addr, src, len);
5533         memcpy(priv->ucode_data_backup.v_addr, src, len);
5534
5535         /* Initialization instructions (3rd block) */
5536         if (init_size) {
5537                 src = &ucode->data[inst_size + data_size];
5538                 len = priv->ucode_init.len;
5539                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5540                                len);
5541                 memcpy(priv->ucode_init.v_addr, src, len);
5542         }
5543
5544         /* Initialization data (4th block) */
5545         if (init_data_size) {
5546                 src = &ucode->data[inst_size + data_size + init_size];
5547                 len = priv->ucode_init_data.len;
5548                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5549                                (int)len);
5550                 memcpy(priv->ucode_init_data.v_addr, src, len);
5551         }
5552
5553         /* Bootstrap instructions (5th block) */
5554         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5555         len = priv->ucode_boot.len;
5556         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5557                        (int)len);
5558         memcpy(priv->ucode_boot.v_addr, src, len);
5559
5560         /* We have our copies now, allow OS release its copies */
5561         release_firmware(ucode_raw);
5562         return 0;
5563
5564  err_pci_alloc:
5565         IWL_ERROR("failed to allocate pci memory\n");
5566         ret = -ENOMEM;
5567         iwl3945_dealloc_ucode_pci(priv);
5568
5569  err_release:
5570         release_firmware(ucode_raw);
5571
5572  error:
5573         return ret;
5574 }
5575
5576
5577 /**
5578  * iwl3945_set_ucode_ptrs - Set uCode address location
5579  *
5580  * Tell initialization uCode where to find runtime uCode.
5581  *
5582  * BSM registers initially contain pointers to initialization uCode.
5583  * We need to replace them to load runtime uCode inst and data,
5584  * and to save runtime data when powering down.
5585  */
5586 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5587 {
5588         dma_addr_t pinst;
5589         dma_addr_t pdata;
5590         int rc = 0;
5591         unsigned long flags;
5592
5593         /* bits 31:0 for 3945 */
5594         pinst = priv->ucode_code.p_addr;
5595         pdata = priv->ucode_data_backup.p_addr;
5596
5597         spin_lock_irqsave(&priv->lock, flags);
5598         rc = iwl3945_grab_nic_access(priv);
5599         if (rc) {
5600                 spin_unlock_irqrestore(&priv->lock, flags);
5601                 return rc;
5602         }
5603
5604         /* Tell bootstrap uCode where to find image to load */
5605         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5606         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5607         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5608                                  priv->ucode_data.len);
5609
5610         /* Inst bytecount must be last to set up, bit 31 signals uCode
5611          *   that all new ptr/size info is in place */
5612         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5613                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5614
5615         iwl3945_release_nic_access(priv);
5616
5617         spin_unlock_irqrestore(&priv->lock, flags);
5618
5619         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5620
5621         return rc;
5622 }
5623
5624 /**
5625  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5626  *
5627  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5628  *
5629  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5630  */
5631 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5632 {
5633         /* Check alive response for "valid" sign from uCode */
5634         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5635                 /* We had an error bringing up the hardware, so take it
5636                  * all the way back down so we can try again */
5637                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5638                 goto restart;
5639         }
5640
5641         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5642          * This is a paranoid check, because we would not have gotten the
5643          * "initialize" alive if code weren't properly loaded.  */
5644         if (iwl3945_verify_ucode(priv)) {
5645                 /* Runtime instruction load was bad;
5646                  * take it all the way back down so we can try again */
5647                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5648                 goto restart;
5649         }
5650
5651         /* Send pointers to protocol/runtime uCode image ... init code will
5652          * load and launch runtime uCode, which will send us another "Alive"
5653          * notification. */
5654         IWL_DEBUG_INFO("Initialization Alive received.\n");
5655         if (iwl3945_set_ucode_ptrs(priv)) {
5656                 /* Runtime instruction load won't happen;
5657                  * take it all the way back down so we can try again */
5658                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5659                 goto restart;
5660         }
5661         return;
5662
5663  restart:
5664         queue_work(priv->workqueue, &priv->restart);
5665 }
5666
5667
5668 /**
5669  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5670  *                   from protocol/runtime uCode (initialization uCode's
5671  *                   Alive gets handled by iwl3945_init_alive_start()).
5672  */
5673 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5674 {
5675         int rc = 0;
5676         int thermal_spin = 0;
5677         u32 rfkill;
5678
5679         IWL_DEBUG_INFO("Runtime Alive received.\n");
5680
5681         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5682                 /* We had an error bringing up the hardware, so take it
5683                  * all the way back down so we can try again */
5684                 IWL_DEBUG_INFO("Alive failed.\n");
5685                 goto restart;
5686         }
5687
5688         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5689          * This is a paranoid check, because we would not have gotten the
5690          * "runtime" alive if code weren't properly loaded.  */
5691         if (iwl3945_verify_ucode(priv)) {
5692                 /* Runtime instruction load was bad;
5693                  * take it all the way back down so we can try again */
5694                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5695                 goto restart;
5696         }
5697
5698         iwl3945_clear_stations_table(priv);
5699
5700         rc = iwl3945_grab_nic_access(priv);
5701         if (rc) {
5702                 IWL_WARNING("Can not read rfkill status from adapter\n");
5703                 return;
5704         }
5705
5706         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5707         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5708         iwl3945_release_nic_access(priv);
5709
5710         if (rfkill & 0x1) {
5711                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5712                 /* if rfkill is not on, then wait for thermal
5713                  * sensor in adapter to kick in */
5714                 while (iwl3945_hw_get_temperature(priv) == 0) {
5715                         thermal_spin++;
5716                         udelay(10);
5717                 }
5718
5719                 if (thermal_spin)
5720                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5721                                        thermal_spin * 10);
5722         } else
5723                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5724
5725         /* After the ALIVE response, we can send commands to 3945 uCode */
5726         set_bit(STATUS_ALIVE, &priv->status);
5727
5728         /* Clear out the uCode error bit if it is set */
5729         clear_bit(STATUS_FW_ERROR, &priv->status);
5730
5731         if (iwl3945_is_rfkill(priv))
5732                 return;
5733
5734         ieee80211_wake_queues(priv->hw);
5735
5736         priv->active_rate = priv->rates_mask;
5737         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5738
5739         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5740
5741         if (iwl3945_is_associated(priv)) {
5742                 struct iwl3945_rxon_cmd *active_rxon =
5743                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5744
5745                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5746                        sizeof(priv->staging_rxon));
5747                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5748         } else {
5749                 /* Initialize our rx_config data */
5750                 iwl3945_connection_init_rx_config(priv);
5751                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5752         }
5753
5754         /* Configure Bluetooth device coexistence support */
5755         iwl3945_send_bt_config(priv);
5756
5757         /* Configure the adapter for unassociated operation */
5758         iwl3945_commit_rxon(priv);
5759
5760         iwl3945_reg_txpower_periodic(priv);
5761
5762         iwl3945_led_register(priv);
5763
5764         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5765         set_bit(STATUS_READY, &priv->status);
5766         wake_up_interruptible(&priv->wait_command_queue);
5767
5768         if (priv->error_recovering)
5769                 iwl3945_error_recovery(priv);
5770
5771         return;
5772
5773  restart:
5774         queue_work(priv->workqueue, &priv->restart);
5775 }
5776
5777 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5778
5779 static void __iwl3945_down(struct iwl3945_priv *priv)
5780 {
5781         unsigned long flags;
5782         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5783         struct ieee80211_conf *conf = NULL;
5784
5785         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5786
5787         conf = ieee80211_get_hw_conf(priv->hw);
5788
5789         if (!exit_pending)
5790                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5791
5792         iwl3945_led_unregister(priv);
5793         iwl3945_clear_stations_table(priv);
5794
5795         /* Unblock any waiting calls */
5796         wake_up_interruptible_all(&priv->wait_command_queue);
5797
5798         /* Wipe out the EXIT_PENDING status bit if we are not actually
5799          * exiting the module */
5800         if (!exit_pending)
5801                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5802
5803         /* stop and reset the on-board processor */
5804         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5805
5806         /* tell the device to stop sending interrupts */
5807         spin_lock_irqsave(&priv->lock, flags);
5808         iwl3945_disable_interrupts(priv);
5809         spin_unlock_irqrestore(&priv->lock, flags);
5810         iwl_synchronize_irq(priv);
5811
5812         if (priv->mac80211_registered)
5813                 ieee80211_stop_queues(priv->hw);
5814
5815         /* If we have not previously called iwl3945_init() then
5816          * clear all bits but the RF Kill and SUSPEND bits and return */
5817         if (!iwl3945_is_init(priv)) {
5818                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5819                                         STATUS_RF_KILL_HW |
5820                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5821                                         STATUS_RF_KILL_SW |
5822                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5823                                         STATUS_GEO_CONFIGURED |
5824                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5825                                         STATUS_IN_SUSPEND |
5826                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5827                                         STATUS_EXIT_PENDING;
5828                 goto exit;
5829         }
5830
5831         /* ...otherwise clear out all the status bits but the RF Kill and
5832          * SUSPEND bits and continue taking the NIC down. */
5833         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5834                                 STATUS_RF_KILL_HW |
5835                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5836                                 STATUS_RF_KILL_SW |
5837                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5838                                 STATUS_GEO_CONFIGURED |
5839                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5840                                 STATUS_IN_SUSPEND |
5841                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5842                                 STATUS_FW_ERROR |
5843                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5844                                 STATUS_EXIT_PENDING;
5845
5846         spin_lock_irqsave(&priv->lock, flags);
5847         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5848         spin_unlock_irqrestore(&priv->lock, flags);
5849
5850         iwl3945_hw_txq_ctx_stop(priv);
5851         iwl3945_hw_rxq_stop(priv);
5852
5853         spin_lock_irqsave(&priv->lock, flags);
5854         if (!iwl3945_grab_nic_access(priv)) {
5855                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5856                                          APMG_CLK_VAL_DMA_CLK_RQT);
5857                 iwl3945_release_nic_access(priv);
5858         }
5859         spin_unlock_irqrestore(&priv->lock, flags);
5860
5861         udelay(5);
5862
5863         iwl3945_hw_nic_stop_master(priv);
5864         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5865         iwl3945_hw_nic_reset(priv);
5866
5867  exit:
5868         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5869
5870         if (priv->ibss_beacon)
5871                 dev_kfree_skb(priv->ibss_beacon);
5872         priv->ibss_beacon = NULL;
5873
5874         /* clear out any free frames */
5875         iwl3945_clear_free_frames(priv);
5876 }
5877
5878 static void iwl3945_down(struct iwl3945_priv *priv)
5879 {
5880         mutex_lock(&priv->mutex);
5881         __iwl3945_down(priv);
5882         mutex_unlock(&priv->mutex);
5883
5884         iwl3945_cancel_deferred_work(priv);
5885 }
5886
5887 #define MAX_HW_RESTARTS 5
5888
5889 static int __iwl3945_up(struct iwl3945_priv *priv)
5890 {
5891         int rc, i;
5892
5893         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5894                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5895                 return -EIO;
5896         }
5897
5898         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5899                 IWL_WARNING("Radio disabled by SW RF kill (module "
5900                             "parameter)\n");
5901                 return -ENODEV;
5902         }
5903
5904         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5905                 IWL_ERROR("ucode not available for device bringup\n");
5906                 return -EIO;
5907         }
5908
5909         /* If platform's RF_KILL switch is NOT set to KILL */
5910         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
5911                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5912                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5913         else {
5914                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5915                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5916                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5917                         return -ENODEV;
5918                 }
5919         }
5920
5921         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5922
5923         rc = iwl3945_hw_nic_init(priv);
5924         if (rc) {
5925                 IWL_ERROR("Unable to int nic\n");
5926                 return rc;
5927         }
5928
5929         /* make sure rfkill handshake bits are cleared */
5930         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5931         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5932                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5933
5934         /* clear (again), then enable host interrupts */
5935         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5936         iwl3945_enable_interrupts(priv);
5937
5938         /* really make sure rfkill handshake bits are cleared */
5939         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5940         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5941
5942         /* Copy original ucode data image from disk into backup cache.
5943          * This will be used to initialize the on-board processor's
5944          * data SRAM for a clean start when the runtime program first loads. */
5945         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5946                priv->ucode_data.len);
5947
5948         /* We return success when we resume from suspend and rf_kill is on. */
5949         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5950                 return 0;
5951
5952         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5953
5954                 iwl3945_clear_stations_table(priv);
5955
5956                 /* load bootstrap state machine,
5957                  * load bootstrap program into processor's memory,
5958                  * prepare to load the "initialize" uCode */
5959                 rc = iwl3945_load_bsm(priv);
5960
5961                 if (rc) {
5962                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
5963                         continue;
5964                 }
5965
5966                 /* start card; "initialize" will load runtime ucode */
5967                 iwl3945_nic_start(priv);
5968
5969                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5970
5971                 return 0;
5972         }
5973
5974         set_bit(STATUS_EXIT_PENDING, &priv->status);
5975         __iwl3945_down(priv);
5976         clear_bit(STATUS_EXIT_PENDING, &priv->status);
5977
5978         /* tried to restart and config the device for as long as our
5979          * patience could withstand */
5980         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5981         return -EIO;
5982 }
5983
5984
5985 /*****************************************************************************
5986  *
5987  * Workqueue callbacks
5988  *
5989  *****************************************************************************/
5990
5991 static void iwl3945_bg_init_alive_start(struct work_struct *data)
5992 {
5993         struct iwl3945_priv *priv =
5994             container_of(data, struct iwl3945_priv, init_alive_start.work);
5995
5996         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5997                 return;
5998
5999         mutex_lock(&priv->mutex);
6000         iwl3945_init_alive_start(priv);
6001         mutex_unlock(&priv->mutex);
6002 }
6003
6004 static void iwl3945_bg_alive_start(struct work_struct *data)
6005 {
6006         struct iwl3945_priv *priv =
6007             container_of(data, struct iwl3945_priv, alive_start.work);
6008
6009         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6010                 return;
6011
6012         mutex_lock(&priv->mutex);
6013         iwl3945_alive_start(priv);
6014         mutex_unlock(&priv->mutex);
6015 }
6016
6017 static void iwl3945_bg_rf_kill(struct work_struct *work)
6018 {
6019         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6020
6021         wake_up_interruptible(&priv->wait_command_queue);
6022
6023         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6024                 return;
6025
6026         mutex_lock(&priv->mutex);
6027
6028         if (!iwl3945_is_rfkill(priv)) {
6029                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6030                           "HW and/or SW RF Kill no longer active, restarting "
6031                           "device\n");
6032                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6033                         queue_work(priv->workqueue, &priv->restart);
6034         } else {
6035
6036                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6037                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6038                                           "disabled by SW switch\n");
6039                 else
6040                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6041                                     "Kill switch must be turned off for "
6042                                     "wireless networking to work.\n");
6043         }
6044
6045         mutex_unlock(&priv->mutex);
6046         iwl3945_rfkill_set_hw_state(priv);
6047 }
6048
6049 static void iwl3945_bg_set_monitor(struct work_struct *work)
6050 {
6051         struct iwl3945_priv *priv = container_of(work,
6052                                 struct iwl3945_priv, set_monitor);
6053
6054         IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");
6055
6056         mutex_lock(&priv->mutex);
6057
6058         if (!iwl3945_is_ready(priv))
6059                 IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
6060         else
6061                 if (iwl3945_set_mode(priv, NL80211_IFTYPE_MONITOR) != 0)
6062                         IWL_ERROR("iwl3945_set_mode() failed\n");
6063
6064         mutex_unlock(&priv->mutex);
6065 }
6066
6067 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6068
6069 static void iwl3945_bg_scan_check(struct work_struct *data)
6070 {
6071         struct iwl3945_priv *priv =
6072             container_of(data, struct iwl3945_priv, scan_check.work);
6073
6074         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6075                 return;
6076
6077         mutex_lock(&priv->mutex);
6078         if (test_bit(STATUS_SCANNING, &priv->status) ||
6079             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6080                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6081                           "Scan completion watchdog resetting adapter (%dms)\n",
6082                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6083
6084                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6085                         iwl3945_send_scan_abort(priv);
6086         }
6087         mutex_unlock(&priv->mutex);
6088 }
6089
6090 static void iwl3945_bg_request_scan(struct work_struct *data)
6091 {
6092         struct iwl3945_priv *priv =
6093             container_of(data, struct iwl3945_priv, request_scan);
6094         struct iwl3945_host_cmd cmd = {
6095                 .id = REPLY_SCAN_CMD,
6096                 .len = sizeof(struct iwl3945_scan_cmd),
6097                 .meta.flags = CMD_SIZE_HUGE,
6098         };
6099         int rc = 0;
6100         struct iwl3945_scan_cmd *scan;
6101         struct ieee80211_conf *conf = NULL;
6102         u8 n_probes = 2;
6103         enum ieee80211_band band;
6104
6105         conf = ieee80211_get_hw_conf(priv->hw);
6106
6107         mutex_lock(&priv->mutex);
6108
6109         if (!iwl3945_is_ready(priv)) {
6110                 IWL_WARNING("request scan called when driver not ready.\n");
6111                 goto done;
6112         }
6113
6114         /* Make sure the scan wasn't cancelled before this queued work
6115          * was given the chance to run... */
6116         if (!test_bit(STATUS_SCANNING, &priv->status))
6117                 goto done;
6118
6119         /* This should never be called or scheduled if there is currently
6120          * a scan active in the hardware. */
6121         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6122                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6123                                "Ignoring second request.\n");
6124                 rc = -EIO;
6125                 goto done;
6126         }
6127
6128         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6129                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6130                 goto done;
6131         }
6132
6133         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6134                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6135                 goto done;
6136         }
6137
6138         if (iwl3945_is_rfkill(priv)) {
6139                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6140                 goto done;
6141         }
6142
6143         if (!test_bit(STATUS_READY, &priv->status)) {
6144                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6145                 goto done;
6146         }
6147
6148         if (!priv->scan_bands) {
6149                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6150                 goto done;
6151         }
6152
6153         if (!priv->scan) {
6154                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6155                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6156                 if (!priv->scan) {
6157                         rc = -ENOMEM;
6158                         goto done;
6159                 }
6160         }
6161         scan = priv->scan;
6162         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6163
6164         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6165         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6166
6167         if (iwl3945_is_associated(priv)) {
6168                 u16 interval = 0;
6169                 u32 extra;
6170                 u32 suspend_time = 100;
6171                 u32 scan_suspend_time = 100;
6172                 unsigned long flags;
6173
6174                 IWL_DEBUG_INFO("Scanning while associated...\n");
6175
6176                 spin_lock_irqsave(&priv->lock, flags);
6177                 interval = priv->beacon_int;
6178                 spin_unlock_irqrestore(&priv->lock, flags);
6179
6180                 scan->suspend_time = 0;
6181                 scan->max_out_time = cpu_to_le32(200 * 1024);
6182                 if (!interval)
6183                         interval = suspend_time;
6184                 /*
6185                  * suspend time format:
6186                  *  0-19: beacon interval in usec (time before exec.)
6187                  * 20-23: 0
6188                  * 24-31: number of beacons (suspend between channels)
6189                  */
6190
6191                 extra = (suspend_time / interval) << 24;
6192                 scan_suspend_time = 0xFF0FFFFF &
6193                     (extra | ((suspend_time % interval) * 1024));
6194
6195                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6196                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6197                                scan_suspend_time, interval);
6198         }
6199
6200         /* We should add the ability for user to lock to PASSIVE ONLY */
6201         if (priv->one_direct_scan) {
6202                 IWL_DEBUG_SCAN
6203                     ("Kicking off one direct scan for '%s'\n",
6204                      iwl3945_escape_essid(priv->direct_ssid,
6205                                       priv->direct_ssid_len));
6206                 scan->direct_scan[0].id = WLAN_EID_SSID;
6207                 scan->direct_scan[0].len = priv->direct_ssid_len;
6208                 memcpy(scan->direct_scan[0].ssid,
6209                        priv->direct_ssid, priv->direct_ssid_len);
6210                 n_probes++;
6211         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6212                 IWL_DEBUG_SCAN
6213                   ("Kicking off one direct scan for '%s' when not associated\n",
6214                    iwl3945_escape_essid(priv->essid, priv->essid_len));
6215                 scan->direct_scan[0].id = WLAN_EID_SSID;
6216                 scan->direct_scan[0].len = priv->essid_len;
6217                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6218                 n_probes++;
6219         } else
6220                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6221
6222         /* We don't build a direct scan probe request; the uCode will do
6223          * that based on the direct_mask added to each channel entry */
6224         scan->tx_cmd.len = cpu_to_le16(
6225                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6226                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6227         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6228         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6229         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6230
6231         /* flags + rate selection */
6232
6233         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
6234                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6235                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6236                 scan->good_CRC_th = 0;
6237                 band = IEEE80211_BAND_2GHZ;
6238         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
6239                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6240                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6241                 band = IEEE80211_BAND_5GHZ;
6242         } else {
6243                 IWL_WARNING("Invalid scan band count\n");
6244                 goto done;
6245         }
6246
6247         /* select Rx antennas */
6248         scan->flags |= iwl3945_get_antenna_flags(priv);
6249
6250         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
6251                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6252
6253         scan->channel_count =
6254                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
6255                                               n_probes,
6256                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6257
6258         if (scan->channel_count == 0) {
6259                 IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
6260                 goto done;
6261         }
6262
6263         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6264             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6265         cmd.data = scan;
6266         scan->len = cpu_to_le16(cmd.len);
6267
6268         set_bit(STATUS_SCAN_HW, &priv->status);
6269         rc = iwl3945_send_cmd_sync(priv, &cmd);
6270         if (rc)
6271                 goto done;
6272
6273         queue_delayed_work(priv->workqueue, &priv->scan_check,
6274                            IWL_SCAN_CHECK_WATCHDOG);
6275
6276         mutex_unlock(&priv->mutex);
6277         return;
6278
6279  done:
6280         /* can not perform scan make sure we clear scanning
6281          * bits from status so next scan request can be performed.
6282          * if we dont clear scanning status bit here all next scan
6283          * will fail
6284         */
6285         clear_bit(STATUS_SCAN_HW, &priv->status);
6286         clear_bit(STATUS_SCANNING, &priv->status);
6287
6288         /* inform mac80211 scan aborted */
6289         queue_work(priv->workqueue, &priv->scan_completed);
6290         mutex_unlock(&priv->mutex);
6291 }
6292
6293 static void iwl3945_bg_up(struct work_struct *data)
6294 {
6295         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6296
6297         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6298                 return;
6299
6300         mutex_lock(&priv->mutex);
6301         __iwl3945_up(priv);
6302         mutex_unlock(&priv->mutex);
6303         iwl3945_rfkill_set_hw_state(priv);
6304 }
6305
6306 static void iwl3945_bg_restart(struct work_struct *data)
6307 {
6308         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6309
6310         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6311                 return;
6312
6313         iwl3945_down(priv);
6314         queue_work(priv->workqueue, &priv->up);
6315 }
6316
6317 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6318 {
6319         struct iwl3945_priv *priv =
6320             container_of(data, struct iwl3945_priv, rx_replenish);
6321
6322         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6323                 return;
6324
6325         mutex_lock(&priv->mutex);
6326         iwl3945_rx_replenish(priv);
6327         mutex_unlock(&priv->mutex);
6328 }
6329
6330 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6331
6332 static void iwl3945_post_associate(struct iwl3945_priv *priv)
6333 {
6334         int rc = 0;
6335         struct ieee80211_conf *conf = NULL;
6336         DECLARE_MAC_BUF(mac);
6337
6338         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6339                 IWL_ERROR("%s Should not be called in AP mode\n", __func__);
6340                 return;
6341         }
6342
6343
6344         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6345                         priv->assoc_id,
6346                         print_mac(mac, priv->active_rxon.bssid_addr));
6347
6348         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6349                 return;
6350
6351         if (!priv->vif || !priv->is_open)
6352                 return;
6353
6354         iwl3945_scan_cancel_timeout(priv, 200);
6355
6356         conf = ieee80211_get_hw_conf(priv->hw);
6357
6358         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6359         iwl3945_commit_rxon(priv);
6360
6361         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6362         iwl3945_setup_rxon_timing(priv);
6363         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6364                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6365         if (rc)
6366                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6367                             "Attempting to continue.\n");
6368
6369         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6370
6371         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6372
6373         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6374                         priv->assoc_id, priv->beacon_int);
6375
6376         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6377                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6378         else
6379                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6380
6381         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6382                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6383                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6384                 else
6385                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6386
6387                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6388                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6389
6390         }
6391
6392         iwl3945_commit_rxon(priv);
6393
6394         switch (priv->iw_mode) {
6395         case NL80211_IFTYPE_STATION:
6396                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6397                 break;
6398
6399         case NL80211_IFTYPE_ADHOC:
6400
6401                 /* clear out the station table */
6402                 iwl3945_clear_stations_table(priv);
6403
6404                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6405                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6406                 iwl3945_sync_sta(priv, IWL_STA_ID,
6407                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6408                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6409                                  CMD_ASYNC);
6410                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6411                 iwl3945_send_beacon_cmd(priv);
6412
6413                 break;
6414
6415         default:
6416                  IWL_ERROR("%s Should not be called in %d mode\n",
6417                            __func__, priv->iw_mode);
6418                 break;
6419         }
6420
6421         iwl3945_activate_qos(priv, 0);
6422
6423         /* we have just associated, don't start scan too early */
6424         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6425 }
6426
6427 static void iwl3945_bg_abort_scan(struct work_struct *work)
6428 {
6429         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6430
6431         if (!iwl3945_is_ready(priv))
6432                 return;
6433
6434         mutex_lock(&priv->mutex);
6435
6436         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6437         iwl3945_send_scan_abort(priv);
6438
6439         mutex_unlock(&priv->mutex);
6440 }
6441
6442 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6443
6444 static void iwl3945_bg_scan_completed(struct work_struct *work)
6445 {
6446         struct iwl3945_priv *priv =
6447             container_of(work, struct iwl3945_priv, scan_completed);
6448
6449         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6450
6451         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6452                 return;
6453
6454         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6455                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6456
6457         ieee80211_scan_completed(priv->hw);
6458
6459         /* Since setting the TXPOWER may have been deferred while
6460          * performing the scan, fire one off */
6461         mutex_lock(&priv->mutex);
6462         iwl3945_hw_reg_send_txpower(priv);
6463         mutex_unlock(&priv->mutex);
6464 }
6465
6466 /*****************************************************************************
6467  *
6468  * mac80211 entry point functions
6469  *
6470  *****************************************************************************/
6471
6472 #define UCODE_READY_TIMEOUT     (2 * HZ)
6473
6474 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6475 {
6476         struct iwl3945_priv *priv = hw->priv;
6477         int ret;
6478
6479         IWL_DEBUG_MAC80211("enter\n");
6480
6481         if (pci_enable_device(priv->pci_dev)) {
6482                 IWL_ERROR("Fail to pci_enable_device\n");
6483                 return -ENODEV;
6484         }
6485         pci_restore_state(priv->pci_dev);
6486         pci_enable_msi(priv->pci_dev);
6487
6488         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6489                           DRV_NAME, priv);
6490         if (ret) {
6491                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6492                 goto out_disable_msi;
6493         }
6494
6495         /* we should be verifying the device is ready to be opened */
6496         mutex_lock(&priv->mutex);
6497
6498         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6499         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6500          * ucode filename and max sizes are card-specific. */
6501
6502         if (!priv->ucode_code.len) {
6503                 ret = iwl3945_read_ucode(priv);
6504                 if (ret) {
6505                         IWL_ERROR("Could not read microcode: %d\n", ret);
6506                         mutex_unlock(&priv->mutex);
6507                         goto out_release_irq;
6508                 }
6509         }
6510
6511         ret = __iwl3945_up(priv);
6512
6513         mutex_unlock(&priv->mutex);
6514
6515         iwl3945_rfkill_set_hw_state(priv);
6516
6517         if (ret)
6518                 goto out_release_irq;
6519
6520         IWL_DEBUG_INFO("Start UP work.\n");
6521
6522         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6523                 return 0;
6524
6525         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6526          * mac80211 will not be run successfully. */
6527         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6528                         test_bit(STATUS_READY, &priv->status),
6529                         UCODE_READY_TIMEOUT);
6530         if (!ret) {
6531                 if (!test_bit(STATUS_READY, &priv->status)) {
6532                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6533                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6534                         ret = -ETIMEDOUT;
6535                         goto out_release_irq;
6536                 }
6537         }
6538
6539         priv->is_open = 1;
6540         IWL_DEBUG_MAC80211("leave\n");
6541         return 0;
6542
6543 out_release_irq:
6544         free_irq(priv->pci_dev->irq, priv);
6545 out_disable_msi:
6546         pci_disable_msi(priv->pci_dev);
6547         pci_disable_device(priv->pci_dev);
6548         priv->is_open = 0;
6549         IWL_DEBUG_MAC80211("leave - failed\n");
6550         return ret;
6551 }
6552
6553 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6554 {
6555         struct iwl3945_priv *priv = hw->priv;
6556
6557         IWL_DEBUG_MAC80211("enter\n");
6558
6559         if (!priv->is_open) {
6560                 IWL_DEBUG_MAC80211("leave - skip\n");
6561                 return;
6562         }
6563
6564         priv->is_open = 0;
6565
6566         if (iwl3945_is_ready_rf(priv)) {
6567                 /* stop mac, cancel any scan request and clear
6568                  * RXON_FILTER_ASSOC_MSK BIT
6569                  */
6570                 mutex_lock(&priv->mutex);
6571                 iwl3945_scan_cancel_timeout(priv, 100);
6572                 mutex_unlock(&priv->mutex);
6573         }
6574
6575         iwl3945_down(priv);
6576
6577         flush_workqueue(priv->workqueue);
6578         free_irq(priv->pci_dev->irq, priv);
6579         pci_disable_msi(priv->pci_dev);
6580         pci_save_state(priv->pci_dev);
6581         pci_disable_device(priv->pci_dev);
6582
6583         IWL_DEBUG_MAC80211("leave\n");
6584 }
6585
6586 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
6587 {
6588         struct iwl3945_priv *priv = hw->priv;
6589
6590         IWL_DEBUG_MAC80211("enter\n");
6591
6592         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6593                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
6594
6595         if (iwl3945_tx_skb(priv, skb))
6596                 dev_kfree_skb_any(skb);
6597
6598         IWL_DEBUG_MAC80211("leave\n");
6599         return 0;
6600 }
6601
6602 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6603                                  struct ieee80211_if_init_conf *conf)
6604 {
6605         struct iwl3945_priv *priv = hw->priv;
6606         unsigned long flags;
6607         DECLARE_MAC_BUF(mac);
6608
6609         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6610
6611         if (priv->vif) {
6612                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6613                 return -EOPNOTSUPP;
6614         }
6615
6616         spin_lock_irqsave(&priv->lock, flags);
6617         priv->vif = conf->vif;
6618
6619         spin_unlock_irqrestore(&priv->lock, flags);
6620
6621         mutex_lock(&priv->mutex);
6622
6623         if (conf->mac_addr) {
6624                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6625                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6626         }
6627
6628         if (iwl3945_is_ready(priv))
6629                 iwl3945_set_mode(priv, conf->type);
6630
6631         mutex_unlock(&priv->mutex);
6632
6633         IWL_DEBUG_MAC80211("leave\n");
6634         return 0;
6635 }
6636
6637 /**
6638  * iwl3945_mac_config - mac80211 config callback
6639  *
6640  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6641  * be set inappropriately and the driver currently sets the hardware up to
6642  * use it whenever needed.
6643  */
6644 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6645 {
6646         struct iwl3945_priv *priv = hw->priv;
6647         const struct iwl3945_channel_info *ch_info;
6648         unsigned long flags;
6649         int ret = 0;
6650
6651         mutex_lock(&priv->mutex);
6652         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6653
6654         if (!iwl3945_is_ready(priv)) {
6655                 IWL_DEBUG_MAC80211("leave - not ready\n");
6656                 ret = -EIO;
6657                 goto out;
6658         }
6659
6660         if (unlikely(!iwl3945_param_disable_hw_scan &&
6661                      test_bit(STATUS_SCANNING, &priv->status))) {
6662                 IWL_DEBUG_MAC80211("leave - scanning\n");
6663                 set_bit(STATUS_CONF_PENDING, &priv->status);
6664                 mutex_unlock(&priv->mutex);
6665                 return 0;
6666         }
6667
6668         spin_lock_irqsave(&priv->lock, flags);
6669
6670         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6671                                            conf->channel->hw_value);
6672         if (!is_channel_valid(ch_info)) {
6673                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
6674                                conf->channel->hw_value, conf->channel->band);
6675                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6676                 spin_unlock_irqrestore(&priv->lock, flags);
6677                 ret = -EINVAL;
6678                 goto out;
6679         }
6680
6681         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6682
6683         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6684
6685         /* The list of supported rates and rate mask can be different
6686          * for each phymode; since the phymode may have changed, reset
6687          * the rate mask to what mac80211 lists */
6688         iwl3945_set_rate(priv);
6689
6690         spin_unlock_irqrestore(&priv->lock, flags);
6691
6692 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6693         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6694                 iwl3945_hw_channel_switch(priv, conf->channel);
6695                 goto out;
6696         }
6697 #endif
6698
6699         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6700
6701         if (!conf->radio_enabled) {
6702                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6703                 goto out;
6704         }
6705
6706         if (iwl3945_is_rfkill(priv)) {
6707                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6708                 ret = -EIO;
6709                 goto out;
6710         }
6711
6712         iwl3945_set_rate(priv);
6713
6714         if (memcmp(&priv->active_rxon,
6715                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6716                 iwl3945_commit_rxon(priv);
6717         else
6718                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6719
6720         IWL_DEBUG_MAC80211("leave\n");
6721
6722 out:
6723         clear_bit(STATUS_CONF_PENDING, &priv->status);
6724         mutex_unlock(&priv->mutex);
6725         return ret;
6726 }
6727
6728 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6729 {
6730         int rc = 0;
6731
6732         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6733                 return;
6734
6735         /* The following should be done only at AP bring up */
6736         if (!(iwl3945_is_associated(priv))) {
6737
6738                 /* RXON - unassoc (to set timing command) */
6739                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6740                 iwl3945_commit_rxon(priv);
6741
6742                 /* RXON Timing */
6743                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6744                 iwl3945_setup_rxon_timing(priv);
6745                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6746                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6747                 if (rc)
6748                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6749                                         "Attempting to continue.\n");
6750
6751                 /* FIXME: what should be the assoc_id for AP? */
6752                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6753                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6754                         priv->staging_rxon.flags |=
6755                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6756                 else
6757                         priv->staging_rxon.flags &=
6758                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6759
6760                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6761                         if (priv->assoc_capability &
6762                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6763                                 priv->staging_rxon.flags |=
6764                                         RXON_FLG_SHORT_SLOT_MSK;
6765                         else
6766                                 priv->staging_rxon.flags &=
6767                                         ~RXON_FLG_SHORT_SLOT_MSK;
6768
6769                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6770                                 priv->staging_rxon.flags &=
6771                                         ~RXON_FLG_SHORT_SLOT_MSK;
6772                 }
6773                 /* restore RXON assoc */
6774                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6775                 iwl3945_commit_rxon(priv);
6776                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6777         }
6778         iwl3945_send_beacon_cmd(priv);
6779
6780         /* FIXME - we need to add code here to detect a totally new
6781          * configuration, reset the AP, unassoc, rxon timing, assoc,
6782          * clear sta table, add BCAST sta... */
6783 }
6784
6785 /* temporary */
6786 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb);
6787
6788 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6789                                         struct ieee80211_vif *vif,
6790                                     struct ieee80211_if_conf *conf)
6791 {
6792         struct iwl3945_priv *priv = hw->priv;
6793         DECLARE_MAC_BUF(mac);
6794         unsigned long flags;
6795         int rc;
6796
6797         if (conf == NULL)
6798                 return -EIO;
6799
6800         if (priv->vif != vif) {
6801                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6802                 return 0;
6803         }
6804
6805         /* handle this temporarily here */
6806         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
6807             conf->changed & IEEE80211_IFCC_BEACON) {
6808                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
6809                 if (!beacon)
6810                         return -ENOMEM;
6811                 rc = iwl3945_mac_beacon_update(hw, beacon);
6812                 if (rc)
6813                         return rc;
6814         }
6815
6816         /* XXX: this MUST use conf->mac_addr */
6817
6818         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
6819             (!conf->ssid_len)) {
6820                 IWL_DEBUG_MAC80211
6821                     ("Leaving in AP mode because HostAPD is not ready.\n");
6822                 return 0;
6823         }
6824
6825         if (!iwl3945_is_alive(priv))
6826                 return -EAGAIN;
6827
6828         mutex_lock(&priv->mutex);
6829
6830         if (conf->bssid)
6831                 IWL_DEBUG_MAC80211("bssid: %s\n",
6832                                    print_mac(mac, conf->bssid));
6833
6834 /*
6835  * very dubious code was here; the probe filtering flag is never set:
6836  *
6837         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6838             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6839  */
6840
6841         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6842                 if (!conf->bssid) {
6843                         conf->bssid = priv->mac_addr;
6844                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6845                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6846                                            print_mac(mac, conf->bssid));
6847                 }
6848                 if (priv->ibss_beacon)
6849                         dev_kfree_skb(priv->ibss_beacon);
6850
6851                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
6852         }
6853
6854         if (iwl3945_is_rfkill(priv))
6855                 goto done;
6856
6857         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6858             !is_multicast_ether_addr(conf->bssid)) {
6859                 /* If there is currently a HW scan going on in the background
6860                  * then we need to cancel it else the RXON below will fail. */
6861                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6862                         IWL_WARNING("Aborted scan still in progress "
6863                                     "after 100ms\n");
6864                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6865                         mutex_unlock(&priv->mutex);
6866                         return -EAGAIN;
6867                 }
6868                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6869
6870                 /* TODO: Audit driver for usage of these members and see
6871                  * if mac80211 deprecates them (priv->bssid looks like it
6872                  * shouldn't be there, but I haven't scanned the IBSS code
6873                  * to verify) - jpk */
6874                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6875
6876                 if (priv->iw_mode == NL80211_IFTYPE_AP)
6877                         iwl3945_config_ap(priv);
6878                 else {
6879                         rc = iwl3945_commit_rxon(priv);
6880                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
6881                                 iwl3945_add_station(priv,
6882                                         priv->active_rxon.bssid_addr, 1, 0);
6883                 }
6884
6885         } else {
6886                 iwl3945_scan_cancel_timeout(priv, 100);
6887                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6888                 iwl3945_commit_rxon(priv);
6889         }
6890
6891  done:
6892         spin_lock_irqsave(&priv->lock, flags);
6893         if (!conf->ssid_len)
6894                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6895         else
6896                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6897
6898         priv->essid_len = conf->ssid_len;
6899         spin_unlock_irqrestore(&priv->lock, flags);
6900
6901         IWL_DEBUG_MAC80211("leave\n");
6902         mutex_unlock(&priv->mutex);
6903
6904         return 0;
6905 }
6906
6907 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6908                                  unsigned int changed_flags,
6909                                  unsigned int *total_flags,
6910                                  int mc_count, struct dev_addr_list *mc_list)
6911 {
6912         struct iwl3945_priv *priv = hw->priv;
6913
6914         if (changed_flags & (*total_flags) & FIF_OTHER_BSS) {
6915                 IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
6916                                    NL80211_IFTYPE_MONITOR,
6917                                    changed_flags, *total_flags);
6918                 /* queue work 'cuz mac80211 is holding a lock which
6919                  * prevents us from issuing (synchronous) f/w cmds */
6920                 queue_work(priv->workqueue, &priv->set_monitor);
6921         }
6922         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
6923                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6924 }
6925
6926 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
6927                                      struct ieee80211_if_init_conf *conf)
6928 {
6929         struct iwl3945_priv *priv = hw->priv;
6930
6931         IWL_DEBUG_MAC80211("enter\n");
6932
6933         mutex_lock(&priv->mutex);
6934
6935         if (iwl3945_is_ready_rf(priv)) {
6936                 iwl3945_scan_cancel_timeout(priv, 100);
6937                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6938                 iwl3945_commit_rxon(priv);
6939         }
6940         if (priv->vif == conf->vif) {
6941                 priv->vif = NULL;
6942                 memset(priv->bssid, 0, ETH_ALEN);
6943                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6944                 priv->essid_len = 0;
6945         }
6946         mutex_unlock(&priv->mutex);
6947
6948         IWL_DEBUG_MAC80211("leave\n");
6949 }
6950
6951 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6952
6953 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
6954                                      struct ieee80211_vif *vif,
6955                                      struct ieee80211_bss_conf *bss_conf,
6956                                      u32 changes)
6957 {
6958         struct iwl3945_priv *priv = hw->priv;
6959
6960         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6961
6962         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6963                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6964                                    bss_conf->use_short_preamble);
6965                 if (bss_conf->use_short_preamble)
6966                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6967                 else
6968                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6969         }
6970
6971         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6972                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6973                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6974                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6975                 else
6976                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6977         }
6978
6979         if (changes & BSS_CHANGED_ASSOC) {
6980                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6981                 /* This should never happen as this function should
6982                  * never be called from interrupt context. */
6983                 if (WARN_ON_ONCE(in_interrupt()))
6984                         return;
6985                 if (bss_conf->assoc) {
6986                         priv->assoc_id = bss_conf->aid;
6987                         priv->beacon_int = bss_conf->beacon_int;
6988                         priv->timestamp0 = bss_conf->timestamp & 0xFFFFFFFF;
6989                         priv->timestamp1 = (bss_conf->timestamp >> 32) &
6990                                              0xFFFFFFFF;
6991                         priv->assoc_capability = bss_conf->assoc_capability;
6992                         priv->next_scan_jiffies = jiffies +
6993                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6994                         mutex_lock(&priv->mutex);
6995                         iwl3945_post_associate(priv);
6996                         mutex_unlock(&priv->mutex);
6997                 } else {
6998                         priv->assoc_id = 0;
6999                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
7000                 }
7001         } else if (changes && iwl3945_is_associated(priv) && priv->assoc_id) {
7002                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
7003                         iwl3945_send_rxon_assoc(priv);
7004         }
7005
7006 }
7007
7008 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7009 {
7010         int rc = 0;
7011         unsigned long flags;
7012         struct iwl3945_priv *priv = hw->priv;
7013
7014         IWL_DEBUG_MAC80211("enter\n");
7015
7016         mutex_lock(&priv->mutex);
7017         spin_lock_irqsave(&priv->lock, flags);
7018
7019         if (!iwl3945_is_ready_rf(priv)) {
7020                 rc = -EIO;
7021                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7022                 goto out_unlock;
7023         }
7024
7025         if (priv->iw_mode == NL80211_IFTYPE_AP) {       /* APs don't scan */
7026                 rc = -EIO;
7027                 IWL_ERROR("ERROR: APs don't scan\n");
7028                 goto out_unlock;
7029         }
7030
7031         /* we don't schedule scan within next_scan_jiffies period */
7032         if (priv->next_scan_jiffies &&
7033                         time_after(priv->next_scan_jiffies, jiffies)) {
7034                 rc = -EAGAIN;
7035                 goto out_unlock;
7036         }
7037         /* if we just finished scan ask for delay for a broadcast scan */
7038         if ((len == 0) && priv->last_scan_jiffies &&
7039             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7040                        jiffies)) {
7041                 rc = -EAGAIN;
7042                 goto out_unlock;
7043         }
7044         if (len) {
7045                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7046                                iwl3945_escape_essid(ssid, len), (int)len);
7047
7048                 priv->one_direct_scan = 1;
7049                 priv->direct_ssid_len = (u8)
7050                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7051                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7052         } else
7053                 priv->one_direct_scan = 0;
7054
7055         rc = iwl3945_scan_initiate(priv);
7056
7057         IWL_DEBUG_MAC80211("leave\n");
7058
7059 out_unlock:
7060         spin_unlock_irqrestore(&priv->lock, flags);
7061         mutex_unlock(&priv->mutex);
7062
7063         return rc;
7064 }
7065
7066 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7067                            const u8 *local_addr, const u8 *addr,
7068                            struct ieee80211_key_conf *key)
7069 {
7070         struct iwl3945_priv *priv = hw->priv;
7071         int rc = 0;
7072         u8 sta_id;
7073
7074         IWL_DEBUG_MAC80211("enter\n");
7075
7076         if (!iwl3945_param_hwcrypto) {
7077                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7078                 return -EOPNOTSUPP;
7079         }
7080
7081         if (is_zero_ether_addr(addr))
7082                 /* only support pairwise keys */
7083                 return -EOPNOTSUPP;
7084
7085         sta_id = iwl3945_hw_find_station(priv, addr);
7086         if (sta_id == IWL_INVALID_STATION) {
7087                 DECLARE_MAC_BUF(mac);
7088
7089                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7090                                    print_mac(mac, addr));
7091                 return -EINVAL;
7092         }
7093
7094         mutex_lock(&priv->mutex);
7095
7096         iwl3945_scan_cancel_timeout(priv, 100);
7097
7098         switch (cmd) {
7099         case  SET_KEY:
7100                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7101                 if (!rc) {
7102                         iwl3945_set_rxon_hwcrypto(priv, 1);
7103                         iwl3945_commit_rxon(priv);
7104                         key->hw_key_idx = sta_id;
7105                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7106                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7107                 }
7108                 break;
7109         case DISABLE_KEY:
7110                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7111                 if (!rc) {
7112                         iwl3945_set_rxon_hwcrypto(priv, 0);
7113                         iwl3945_commit_rxon(priv);
7114                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7115                 }
7116                 break;
7117         default:
7118                 rc = -EINVAL;
7119         }
7120
7121         IWL_DEBUG_MAC80211("leave\n");
7122         mutex_unlock(&priv->mutex);
7123
7124         return rc;
7125 }
7126
7127 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
7128                            const struct ieee80211_tx_queue_params *params)
7129 {
7130         struct iwl3945_priv *priv = hw->priv;
7131         unsigned long flags;
7132         int q;
7133
7134         IWL_DEBUG_MAC80211("enter\n");
7135
7136         if (!iwl3945_is_ready_rf(priv)) {
7137                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7138                 return -EIO;
7139         }
7140
7141         if (queue >= AC_NUM) {
7142                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7143                 return 0;
7144         }
7145
7146         if (!priv->qos_data.qos_enable) {
7147                 priv->qos_data.qos_active = 0;
7148                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7149                 return 0;
7150         }
7151         q = AC_NUM - 1 - queue;
7152
7153         spin_lock_irqsave(&priv->lock, flags);
7154
7155         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7156         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7157         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7158         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7159                         cpu_to_le16((params->txop * 32));
7160
7161         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7162         priv->qos_data.qos_active = 1;
7163
7164         spin_unlock_irqrestore(&priv->lock, flags);
7165
7166         mutex_lock(&priv->mutex);
7167         if (priv->iw_mode == NL80211_IFTYPE_AP)
7168                 iwl3945_activate_qos(priv, 1);
7169         else if (priv->assoc_id && iwl3945_is_associated(priv))
7170                 iwl3945_activate_qos(priv, 0);
7171
7172         mutex_unlock(&priv->mutex);
7173
7174         IWL_DEBUG_MAC80211("leave\n");
7175         return 0;
7176 }
7177
7178 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7179                                 struct ieee80211_tx_queue_stats *stats)
7180 {
7181         struct iwl3945_priv *priv = hw->priv;
7182         int i, avail;
7183         struct iwl3945_tx_queue *txq;
7184         struct iwl3945_queue *q;
7185         unsigned long flags;
7186
7187         IWL_DEBUG_MAC80211("enter\n");
7188
7189         if (!iwl3945_is_ready_rf(priv)) {
7190                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7191                 return -EIO;
7192         }
7193
7194         spin_lock_irqsave(&priv->lock, flags);
7195
7196         for (i = 0; i < AC_NUM; i++) {
7197                 txq = &priv->txq[i];
7198                 q = &txq->q;
7199                 avail = iwl3945_queue_space(q);
7200
7201                 stats[i].len = q->n_window - avail;
7202                 stats[i].limit = q->n_window - q->high_mark;
7203                 stats[i].count = q->n_window;
7204
7205         }
7206         spin_unlock_irqrestore(&priv->lock, flags);
7207
7208         IWL_DEBUG_MAC80211("leave\n");
7209
7210         return 0;
7211 }
7212
7213 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7214                              struct ieee80211_low_level_stats *stats)
7215 {
7216         IWL_DEBUG_MAC80211("enter\n");
7217         IWL_DEBUG_MAC80211("leave\n");
7218
7219         return 0;
7220 }
7221
7222 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7223 {
7224         IWL_DEBUG_MAC80211("enter\n");
7225         IWL_DEBUG_MAC80211("leave\n");
7226
7227         return 0;
7228 }
7229
7230 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7231 {
7232         struct iwl3945_priv *priv = hw->priv;
7233         unsigned long flags;
7234
7235         mutex_lock(&priv->mutex);
7236         IWL_DEBUG_MAC80211("enter\n");
7237
7238         iwl3945_reset_qos(priv);
7239
7240         spin_lock_irqsave(&priv->lock, flags);
7241         priv->assoc_id = 0;
7242         priv->assoc_capability = 0;
7243         priv->call_post_assoc_from_beacon = 0;
7244
7245         /* new association get rid of ibss beacon skb */
7246         if (priv->ibss_beacon)
7247                 dev_kfree_skb(priv->ibss_beacon);
7248
7249         priv->ibss_beacon = NULL;
7250
7251         priv->beacon_int = priv->hw->conf.beacon_int;
7252         priv->timestamp1 = 0;
7253         priv->timestamp0 = 0;
7254         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
7255                 priv->beacon_int = 0;
7256
7257         spin_unlock_irqrestore(&priv->lock, flags);
7258
7259         if (!iwl3945_is_ready_rf(priv)) {
7260                 IWL_DEBUG_MAC80211("leave - not ready\n");
7261                 mutex_unlock(&priv->mutex);
7262                 return;
7263         }
7264
7265         /* we are restarting association process
7266          * clear RXON_FILTER_ASSOC_MSK bit
7267         */
7268         if (priv->iw_mode != NL80211_IFTYPE_AP) {
7269                 iwl3945_scan_cancel_timeout(priv, 100);
7270                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7271                 iwl3945_commit_rxon(priv);
7272         }
7273
7274         /* Per mac80211.h: This is only used in IBSS mode... */
7275         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7276
7277                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7278                 mutex_unlock(&priv->mutex);
7279                 return;
7280         }
7281
7282         iwl3945_set_rate(priv);
7283
7284         mutex_unlock(&priv->mutex);
7285
7286         IWL_DEBUG_MAC80211("leave\n");
7287
7288 }
7289
7290 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
7291 {
7292         struct iwl3945_priv *priv = hw->priv;
7293         unsigned long flags;
7294
7295         mutex_lock(&priv->mutex);
7296         IWL_DEBUG_MAC80211("enter\n");
7297
7298         if (!iwl3945_is_ready_rf(priv)) {
7299                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7300                 mutex_unlock(&priv->mutex);
7301                 return -EIO;
7302         }
7303
7304         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7305                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7306                 mutex_unlock(&priv->mutex);
7307                 return -EIO;
7308         }
7309
7310         spin_lock_irqsave(&priv->lock, flags);
7311
7312         if (priv->ibss_beacon)
7313                 dev_kfree_skb(priv->ibss_beacon);
7314
7315         priv->ibss_beacon = skb;
7316
7317         priv->assoc_id = 0;
7318
7319         IWL_DEBUG_MAC80211("leave\n");
7320         spin_unlock_irqrestore(&priv->lock, flags);
7321
7322         iwl3945_reset_qos(priv);
7323
7324         iwl3945_post_associate(priv);
7325
7326         mutex_unlock(&priv->mutex);
7327
7328         return 0;
7329 }
7330
7331 /*****************************************************************************
7332  *
7333  * sysfs attributes
7334  *
7335  *****************************************************************************/
7336
7337 #ifdef CONFIG_IWL3945_DEBUG
7338
7339 /*
7340  * The following adds a new attribute to the sysfs representation
7341  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7342  * used for controlling the debug level.
7343  *
7344  * See the level definitions in iwl for details.
7345  */
7346
7347 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7348 {
7349         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7350 }
7351 static ssize_t store_debug_level(struct device_driver *d,
7352                                  const char *buf, size_t count)
7353 {
7354         char *p = (char *)buf;
7355         u32 val;
7356
7357         val = simple_strtoul(p, &p, 0);
7358         if (p == buf)
7359                 printk(KERN_INFO DRV_NAME
7360                        ": %s is not in hex or decimal form.\n", buf);
7361         else
7362                 iwl3945_debug_level = val;
7363
7364         return strnlen(buf, count);
7365 }
7366
7367 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7368                    show_debug_level, store_debug_level);
7369
7370 #endif /* CONFIG_IWL3945_DEBUG */
7371
7372 static ssize_t show_temperature(struct device *d,
7373                                 struct device_attribute *attr, char *buf)
7374 {
7375         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7376
7377         if (!iwl3945_is_alive(priv))
7378                 return -EAGAIN;
7379
7380         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7381 }
7382
7383 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7384
7385 static ssize_t show_tx_power(struct device *d,
7386                              struct device_attribute *attr, char *buf)
7387 {
7388         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7389         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7390 }
7391
7392 static ssize_t store_tx_power(struct device *d,
7393                               struct device_attribute *attr,
7394                               const char *buf, size_t count)
7395 {
7396         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7397         char *p = (char *)buf;
7398         u32 val;
7399
7400         val = simple_strtoul(p, &p, 10);
7401         if (p == buf)
7402                 printk(KERN_INFO DRV_NAME
7403                        ": %s is not in decimal form.\n", buf);
7404         else
7405                 iwl3945_hw_reg_set_txpower(priv, val);
7406
7407         return count;
7408 }
7409
7410 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7411
7412 static ssize_t show_flags(struct device *d,
7413                           struct device_attribute *attr, char *buf)
7414 {
7415         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7416
7417         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7418 }
7419
7420 static ssize_t store_flags(struct device *d,
7421                            struct device_attribute *attr,
7422                            const char *buf, size_t count)
7423 {
7424         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7425         u32 flags = simple_strtoul(buf, NULL, 0);
7426
7427         mutex_lock(&priv->mutex);
7428         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7429                 /* Cancel any currently running scans... */
7430                 if (iwl3945_scan_cancel_timeout(priv, 100))
7431                         IWL_WARNING("Could not cancel scan.\n");
7432                 else {
7433                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7434                                        flags);
7435                         priv->staging_rxon.flags = cpu_to_le32(flags);
7436                         iwl3945_commit_rxon(priv);
7437                 }
7438         }
7439         mutex_unlock(&priv->mutex);
7440
7441         return count;
7442 }
7443
7444 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7445
7446 static ssize_t show_filter_flags(struct device *d,
7447                                  struct device_attribute *attr, char *buf)
7448 {
7449         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7450
7451         return sprintf(buf, "0x%04X\n",
7452                 le32_to_cpu(priv->active_rxon.filter_flags));
7453 }
7454
7455 static ssize_t store_filter_flags(struct device *d,
7456                                   struct device_attribute *attr,
7457                                   const char *buf, size_t count)
7458 {
7459         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7460         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7461
7462         mutex_lock(&priv->mutex);
7463         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7464                 /* Cancel any currently running scans... */
7465                 if (iwl3945_scan_cancel_timeout(priv, 100))
7466                         IWL_WARNING("Could not cancel scan.\n");
7467                 else {
7468                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7469                                        "0x%04X\n", filter_flags);
7470                         priv->staging_rxon.filter_flags =
7471                                 cpu_to_le32(filter_flags);
7472                         iwl3945_commit_rxon(priv);
7473                 }
7474         }
7475         mutex_unlock(&priv->mutex);
7476
7477         return count;
7478 }
7479
7480 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7481                    store_filter_flags);
7482
7483 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7484
7485 static ssize_t show_measurement(struct device *d,
7486                                 struct device_attribute *attr, char *buf)
7487 {
7488         struct iwl3945_priv *priv = dev_get_drvdata(d);
7489         struct iwl3945_spectrum_notification measure_report;
7490         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7491         u8 *data = (u8 *)&measure_report;
7492         unsigned long flags;
7493
7494         spin_lock_irqsave(&priv->lock, flags);
7495         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7496                 spin_unlock_irqrestore(&priv->lock, flags);
7497                 return 0;
7498         }
7499         memcpy(&measure_report, &priv->measure_report, size);
7500         priv->measurement_status = 0;
7501         spin_unlock_irqrestore(&priv->lock, flags);
7502
7503         while (size && (PAGE_SIZE - len)) {
7504                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7505                                    PAGE_SIZE - len, 1);
7506                 len = strlen(buf);
7507                 if (PAGE_SIZE - len)
7508                         buf[len++] = '\n';
7509
7510                 ofs += 16;
7511                 size -= min(size, 16U);
7512         }
7513
7514         return len;
7515 }
7516
7517 static ssize_t store_measurement(struct device *d,
7518                                  struct device_attribute *attr,
7519                                  const char *buf, size_t count)
7520 {
7521         struct iwl3945_priv *priv = dev_get_drvdata(d);
7522         struct ieee80211_measurement_params params = {
7523                 .channel = le16_to_cpu(priv->active_rxon.channel),
7524                 .start_time = cpu_to_le64(priv->last_tsf),
7525                 .duration = cpu_to_le16(1),
7526         };
7527         u8 type = IWL_MEASURE_BASIC;
7528         u8 buffer[32];
7529         u8 channel;
7530
7531         if (count) {
7532                 char *p = buffer;
7533                 strncpy(buffer, buf, min(sizeof(buffer), count));
7534                 channel = simple_strtoul(p, NULL, 0);
7535                 if (channel)
7536                         params.channel = channel;
7537
7538                 p = buffer;
7539                 while (*p && *p != ' ')
7540                         p++;
7541                 if (*p)
7542                         type = simple_strtoul(p + 1, NULL, 0);
7543         }
7544
7545         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7546                        "channel %d (for '%s')\n", type, params.channel, buf);
7547         iwl3945_get_measurement(priv, &params, type);
7548
7549         return count;
7550 }
7551
7552 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7553                    show_measurement, store_measurement);
7554 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7555
7556 static ssize_t store_retry_rate(struct device *d,
7557                                 struct device_attribute *attr,
7558                                 const char *buf, size_t count)
7559 {
7560         struct iwl3945_priv *priv = dev_get_drvdata(d);
7561
7562         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7563         if (priv->retry_rate <= 0)
7564                 priv->retry_rate = 1;
7565
7566         return count;
7567 }
7568
7569 static ssize_t show_retry_rate(struct device *d,
7570                                struct device_attribute *attr, char *buf)
7571 {
7572         struct iwl3945_priv *priv = dev_get_drvdata(d);
7573         return sprintf(buf, "%d", priv->retry_rate);
7574 }
7575
7576 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7577                    store_retry_rate);
7578
7579 static ssize_t store_power_level(struct device *d,
7580                                  struct device_attribute *attr,
7581                                  const char *buf, size_t count)
7582 {
7583         struct iwl3945_priv *priv = dev_get_drvdata(d);
7584         int rc;
7585         int mode;
7586
7587         mode = simple_strtoul(buf, NULL, 0);
7588         mutex_lock(&priv->mutex);
7589
7590         if (!iwl3945_is_ready(priv)) {
7591                 rc = -EAGAIN;
7592                 goto out;
7593         }
7594
7595         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7596                 mode = IWL_POWER_AC;
7597         else
7598                 mode |= IWL_POWER_ENABLED;
7599
7600         if (mode != priv->power_mode) {
7601                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7602                 if (rc) {
7603                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7604                         goto out;
7605                 }
7606                 priv->power_mode = mode;
7607         }
7608
7609         rc = count;
7610
7611  out:
7612         mutex_unlock(&priv->mutex);
7613         return rc;
7614 }
7615
7616 #define MAX_WX_STRING 80
7617
7618 /* Values are in microsecond */
7619 static const s32 timeout_duration[] = {
7620         350000,
7621         250000,
7622         75000,
7623         37000,
7624         25000,
7625 };
7626 static const s32 period_duration[] = {
7627         400000,
7628         700000,
7629         1000000,
7630         1000000,
7631         1000000
7632 };
7633
7634 static ssize_t show_power_level(struct device *d,
7635                                 struct device_attribute *attr, char *buf)
7636 {
7637         struct iwl3945_priv *priv = dev_get_drvdata(d);
7638         int level = IWL_POWER_LEVEL(priv->power_mode);
7639         char *p = buf;
7640
7641         p += sprintf(p, "%d ", level);
7642         switch (level) {
7643         case IWL_POWER_MODE_CAM:
7644         case IWL_POWER_AC:
7645                 p += sprintf(p, "(AC)");
7646                 break;
7647         case IWL_POWER_BATTERY:
7648                 p += sprintf(p, "(BATTERY)");
7649                 break;
7650         default:
7651                 p += sprintf(p,
7652                              "(Timeout %dms, Period %dms)",
7653                              timeout_duration[level - 1] / 1000,
7654                              period_duration[level - 1] / 1000);
7655         }
7656
7657         if (!(priv->power_mode & IWL_POWER_ENABLED))
7658                 p += sprintf(p, " OFF\n");
7659         else
7660                 p += sprintf(p, " \n");
7661
7662         return p - buf + 1;
7663
7664 }
7665
7666 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7667                    store_power_level);
7668
7669 static ssize_t show_channels(struct device *d,
7670                              struct device_attribute *attr, char *buf)
7671 {
7672         /* all this shit doesn't belong into sysfs anyway */
7673         return 0;
7674 }
7675
7676 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7677
7678 static ssize_t show_statistics(struct device *d,
7679                                struct device_attribute *attr, char *buf)
7680 {
7681         struct iwl3945_priv *priv = dev_get_drvdata(d);
7682         u32 size = sizeof(struct iwl3945_notif_statistics);
7683         u32 len = 0, ofs = 0;
7684         u8 *data = (u8 *)&priv->statistics;
7685         int rc = 0;
7686
7687         if (!iwl3945_is_alive(priv))
7688                 return -EAGAIN;
7689
7690         mutex_lock(&priv->mutex);
7691         rc = iwl3945_send_statistics_request(priv);
7692         mutex_unlock(&priv->mutex);
7693
7694         if (rc) {
7695                 len = sprintf(buf,
7696                               "Error sending statistics request: 0x%08X\n", rc);
7697                 return len;
7698         }
7699
7700         while (size && (PAGE_SIZE - len)) {
7701                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7702                                    PAGE_SIZE - len, 1);
7703                 len = strlen(buf);
7704                 if (PAGE_SIZE - len)
7705                         buf[len++] = '\n';
7706
7707                 ofs += 16;
7708                 size -= min(size, 16U);
7709         }
7710
7711         return len;
7712 }
7713
7714 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7715
7716 static ssize_t show_antenna(struct device *d,
7717                             struct device_attribute *attr, char *buf)
7718 {
7719         struct iwl3945_priv *priv = dev_get_drvdata(d);
7720
7721         if (!iwl3945_is_alive(priv))
7722                 return -EAGAIN;
7723
7724         return sprintf(buf, "%d\n", priv->antenna);
7725 }
7726
7727 static ssize_t store_antenna(struct device *d,
7728                              struct device_attribute *attr,
7729                              const char *buf, size_t count)
7730 {
7731         int ant;
7732         struct iwl3945_priv *priv = dev_get_drvdata(d);
7733
7734         if (count == 0)
7735                 return 0;
7736
7737         if (sscanf(buf, "%1i", &ant) != 1) {
7738                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7739                 return count;
7740         }
7741
7742         if ((ant >= 0) && (ant <= 2)) {
7743                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7744                 priv->antenna = (enum iwl3945_antenna)ant;
7745         } else
7746                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7747
7748
7749         return count;
7750 }
7751
7752 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7753
7754 static ssize_t show_status(struct device *d,
7755                            struct device_attribute *attr, char *buf)
7756 {
7757         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7758         if (!iwl3945_is_alive(priv))
7759                 return -EAGAIN;
7760         return sprintf(buf, "0x%08x\n", (int)priv->status);
7761 }
7762
7763 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7764
7765 static ssize_t dump_error_log(struct device *d,
7766                               struct device_attribute *attr,
7767                               const char *buf, size_t count)
7768 {
7769         char *p = (char *)buf;
7770
7771         if (p[0] == '1')
7772                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7773
7774         return strnlen(buf, count);
7775 }
7776
7777 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7778
7779 static ssize_t dump_event_log(struct device *d,
7780                               struct device_attribute *attr,
7781                               const char *buf, size_t count)
7782 {
7783         char *p = (char *)buf;
7784
7785         if (p[0] == '1')
7786                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7787
7788         return strnlen(buf, count);
7789 }
7790
7791 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7792
7793 /*****************************************************************************
7794  *
7795  * driver setup and teardown
7796  *
7797  *****************************************************************************/
7798
7799 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7800 {
7801         priv->workqueue = create_workqueue(DRV_NAME);
7802
7803         init_waitqueue_head(&priv->wait_command_queue);
7804
7805         INIT_WORK(&priv->up, iwl3945_bg_up);
7806         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7807         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7808         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7809         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7810         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7811         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7812         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7813         INIT_WORK(&priv->set_monitor, iwl3945_bg_set_monitor);
7814         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7815         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7816         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7817
7818         iwl3945_hw_setup_deferred_work(priv);
7819
7820         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7821                      iwl3945_irq_tasklet, (unsigned long)priv);
7822 }
7823
7824 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7825 {
7826         iwl3945_hw_cancel_deferred_work(priv);
7827
7828         cancel_delayed_work_sync(&priv->init_alive_start);
7829         cancel_delayed_work(&priv->scan_check);
7830         cancel_delayed_work(&priv->alive_start);
7831         cancel_work_sync(&priv->beacon_update);
7832 }
7833
7834 static struct attribute *iwl3945_sysfs_entries[] = {
7835         &dev_attr_antenna.attr,
7836         &dev_attr_channels.attr,
7837         &dev_attr_dump_errors.attr,
7838         &dev_attr_dump_events.attr,
7839         &dev_attr_flags.attr,
7840         &dev_attr_filter_flags.attr,
7841 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7842         &dev_attr_measurement.attr,
7843 #endif
7844         &dev_attr_power_level.attr,
7845         &dev_attr_retry_rate.attr,
7846         &dev_attr_statistics.attr,
7847         &dev_attr_status.attr,
7848         &dev_attr_temperature.attr,
7849         &dev_attr_tx_power.attr,
7850
7851         NULL
7852 };
7853
7854 static struct attribute_group iwl3945_attribute_group = {
7855         .name = NULL,           /* put in device directory */
7856         .attrs = iwl3945_sysfs_entries,
7857 };
7858
7859 static struct ieee80211_ops iwl3945_hw_ops = {
7860         .tx = iwl3945_mac_tx,
7861         .start = iwl3945_mac_start,
7862         .stop = iwl3945_mac_stop,
7863         .add_interface = iwl3945_mac_add_interface,
7864         .remove_interface = iwl3945_mac_remove_interface,
7865         .config = iwl3945_mac_config,
7866         .config_interface = iwl3945_mac_config_interface,
7867         .configure_filter = iwl3945_configure_filter,
7868         .set_key = iwl3945_mac_set_key,
7869         .get_stats = iwl3945_mac_get_stats,
7870         .get_tx_stats = iwl3945_mac_get_tx_stats,
7871         .conf_tx = iwl3945_mac_conf_tx,
7872         .get_tsf = iwl3945_mac_get_tsf,
7873         .reset_tsf = iwl3945_mac_reset_tsf,
7874         .bss_info_changed = iwl3945_bss_info_changed,
7875         .hw_scan = iwl3945_mac_hw_scan
7876 };
7877
7878 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7879 {
7880         int err = 0;
7881         struct iwl3945_priv *priv;
7882         struct ieee80211_hw *hw;
7883         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7884         unsigned long flags;
7885         DECLARE_MAC_BUF(mac);
7886
7887         /* Disabling hardware scan means that mac80211 will perform scans
7888          * "the hard way", rather than using device's scan. */
7889         if (iwl3945_param_disable_hw_scan) {
7890                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7891                 iwl3945_hw_ops.hw_scan = NULL;
7892         }
7893
7894         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7895             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7896                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7897                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7898                 err = -EINVAL;
7899                 goto out;
7900         }
7901
7902         /* mac80211 allocates memory for this device instance, including
7903          *   space for this driver's private structure */
7904         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7905         if (hw == NULL) {
7906                 IWL_ERROR("Can not allocate network device\n");
7907                 err = -ENOMEM;
7908                 goto out;
7909         }
7910         SET_IEEE80211_DEV(hw, &pdev->dev);
7911
7912         hw->rate_control_algorithm = "iwl-3945-rs";
7913         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
7914
7915         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7916         priv = hw->priv;
7917         priv->hw = hw;
7918
7919         priv->pci_dev = pdev;
7920         priv->cfg = cfg;
7921
7922         /* Select antenna (may be helpful if only one antenna is connected) */
7923         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7924 #ifdef CONFIG_IWL3945_DEBUG
7925         iwl3945_debug_level = iwl3945_param_debug;
7926         atomic_set(&priv->restrict_refcnt, 0);
7927 #endif
7928         priv->retry_rate = 1;
7929
7930         priv->ibss_beacon = NULL;
7931
7932         /* Tell mac80211 our characteristics */
7933         hw->flags = IEEE80211_HW_SIGNAL_DBM |
7934                     IEEE80211_HW_NOISE_DBM;
7935
7936         hw->wiphy->interface_modes =
7937                 BIT(NL80211_IFTYPE_AP) |
7938                 BIT(NL80211_IFTYPE_STATION) |
7939                 BIT(NL80211_IFTYPE_ADHOC);
7940
7941         /* 4 EDCA QOS priorities */
7942         hw->queues = 4;
7943
7944         spin_lock_init(&priv->lock);
7945         spin_lock_init(&priv->power_data.lock);
7946         spin_lock_init(&priv->sta_lock);
7947         spin_lock_init(&priv->hcmd_lock);
7948
7949         INIT_LIST_HEAD(&priv->free_frames);
7950
7951         mutex_init(&priv->mutex);
7952         if (pci_enable_device(pdev)) {
7953                 err = -ENODEV;
7954                 goto out_ieee80211_free_hw;
7955         }
7956
7957         pci_set_master(pdev);
7958
7959         /* Clear the driver's (not device's) station table */
7960         iwl3945_clear_stations_table(priv);
7961
7962         priv->data_retry_limit = -1;
7963         priv->ieee_channels = NULL;
7964         priv->ieee_rates = NULL;
7965         priv->band = IEEE80211_BAND_2GHZ;
7966
7967         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7968         if (!err)
7969                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7970         if (err) {
7971                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
7972                 goto out_pci_disable_device;
7973         }
7974
7975         pci_set_drvdata(pdev, priv);
7976         err = pci_request_regions(pdev, DRV_NAME);
7977         if (err)
7978                 goto out_pci_disable_device;
7979
7980         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7981          * PCI Tx retries from interfering with C3 CPU state */
7982         pci_write_config_byte(pdev, 0x41, 0x00);
7983
7984         priv->hw_base = pci_iomap(pdev, 0, 0);
7985         if (!priv->hw_base) {
7986                 err = -ENODEV;
7987                 goto out_pci_release_regions;
7988         }
7989
7990         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7991                         (unsigned long long) pci_resource_len(pdev, 0));
7992         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7993
7994         /* Initialize module parameter values here */
7995
7996         /* Disable radio (SW RF KILL) via parameter when loading driver */
7997         if (iwl3945_param_disable) {
7998                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7999                 IWL_DEBUG_INFO("Radio disabled.\n");
8000         }
8001
8002         priv->iw_mode = NL80211_IFTYPE_STATION;
8003
8004         printk(KERN_INFO DRV_NAME
8005                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8006
8007         /* Device-specific setup */
8008         if (iwl3945_hw_set_hw_setting(priv)) {
8009                 IWL_ERROR("failed to set hw settings\n");
8010                 goto out_iounmap;
8011         }
8012
8013         if (iwl3945_param_qos_enable)
8014                 priv->qos_data.qos_enable = 1;
8015
8016         iwl3945_reset_qos(priv);
8017
8018         priv->qos_data.qos_active = 0;
8019         priv->qos_data.qos_cap.val = 0;
8020
8021         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8022         iwl3945_setup_deferred_work(priv);
8023         iwl3945_setup_rx_handlers(priv);
8024
8025         priv->rates_mask = IWL_RATES_MASK;
8026         /* If power management is turned on, default to AC mode */
8027         priv->power_mode = IWL_POWER_AC;
8028         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8029
8030         spin_lock_irqsave(&priv->lock, flags);
8031         iwl3945_disable_interrupts(priv);
8032         spin_unlock_irqrestore(&priv->lock, flags);
8033
8034         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8035         if (err) {
8036                 IWL_ERROR("failed to create sysfs device attributes\n");
8037                 goto out_release_irq;
8038         }
8039
8040         /* nic init */
8041         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8042                         CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8043
8044         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8045         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8046                                CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8047                                CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8048         if (err < 0) {
8049                 IWL_DEBUG_INFO("Failed to init the card\n");
8050                 goto out_remove_sysfs;
8051         }
8052         /* Read the EEPROM */
8053         err = iwl3945_eeprom_init(priv);
8054         if (err) {
8055                 IWL_ERROR("Unable to init EEPROM\n");
8056                 goto out_remove_sysfs;
8057         }
8058         /* MAC Address location in EEPROM same for 3945/4965 */
8059         get_eeprom_mac(priv, priv->mac_addr);
8060         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8061         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8062
8063         err = iwl3945_init_channel_map(priv);
8064         if (err) {
8065                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8066                 goto out_remove_sysfs;
8067         }
8068
8069         err = iwl3945_init_geos(priv);
8070         if (err) {
8071                 IWL_ERROR("initializing geos failed: %d\n", err);
8072                 goto out_free_channel_map;
8073         }
8074
8075         err = ieee80211_register_hw(priv->hw);
8076         if (err) {
8077                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8078                 goto out_free_geos;
8079         }
8080
8081         priv->hw->conf.beacon_int = 100;
8082         priv->mac80211_registered = 1;
8083         pci_save_state(pdev);
8084         pci_disable_device(pdev);
8085
8086         err = iwl3945_rfkill_init(priv);
8087         if (err)
8088                 IWL_ERROR("Unable to initialize RFKILL system. "
8089                                   "Ignoring error: %d\n", err);
8090
8091         return 0;
8092
8093  out_free_geos:
8094         iwl3945_free_geos(priv);
8095  out_free_channel_map:
8096         iwl3945_free_channel_map(priv);
8097  out_remove_sysfs:
8098         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8099
8100  out_release_irq:
8101         destroy_workqueue(priv->workqueue);
8102         priv->workqueue = NULL;
8103         iwl3945_unset_hw_setting(priv);
8104
8105  out_iounmap:
8106         pci_iounmap(pdev, priv->hw_base);
8107  out_pci_release_regions:
8108         pci_release_regions(pdev);
8109  out_pci_disable_device:
8110         pci_disable_device(pdev);
8111         pci_set_drvdata(pdev, NULL);
8112  out_ieee80211_free_hw:
8113         ieee80211_free_hw(priv->hw);
8114  out:
8115         return err;
8116 }
8117
8118 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8119 {
8120         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8121         unsigned long flags;
8122
8123         if (!priv)
8124                 return;
8125
8126         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8127
8128         set_bit(STATUS_EXIT_PENDING, &priv->status);
8129
8130         iwl3945_down(priv);
8131
8132         /* make sure we flush any pending irq or
8133          * tasklet for the driver
8134          */
8135         spin_lock_irqsave(&priv->lock, flags);
8136         iwl3945_disable_interrupts(priv);
8137         spin_unlock_irqrestore(&priv->lock, flags);
8138
8139         iwl_synchronize_irq(priv);
8140
8141         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8142
8143         iwl3945_rfkill_unregister(priv);
8144         iwl3945_dealloc_ucode_pci(priv);
8145
8146         if (priv->rxq.bd)
8147                 iwl3945_rx_queue_free(priv, &priv->rxq);
8148         iwl3945_hw_txq_ctx_free(priv);
8149
8150         iwl3945_unset_hw_setting(priv);
8151         iwl3945_clear_stations_table(priv);
8152
8153         if (priv->mac80211_registered)
8154                 ieee80211_unregister_hw(priv->hw);
8155
8156         /*netif_stop_queue(dev); */
8157         flush_workqueue(priv->workqueue);
8158
8159         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8160          * priv->workqueue... so we can't take down the workqueue
8161          * until now... */
8162         destroy_workqueue(priv->workqueue);
8163         priv->workqueue = NULL;
8164
8165         pci_iounmap(pdev, priv->hw_base);
8166         pci_release_regions(pdev);
8167         pci_disable_device(pdev);
8168         pci_set_drvdata(pdev, NULL);
8169
8170         iwl3945_free_channel_map(priv);
8171         iwl3945_free_geos(priv);
8172         kfree(priv->scan);
8173         if (priv->ibss_beacon)
8174                 dev_kfree_skb(priv->ibss_beacon);
8175
8176         ieee80211_free_hw(priv->hw);
8177 }
8178
8179 #ifdef CONFIG_PM
8180
8181 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8182 {
8183         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8184
8185         if (priv->is_open) {
8186                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8187                 iwl3945_mac_stop(priv->hw);
8188                 priv->is_open = 1;
8189         }
8190
8191         pci_set_power_state(pdev, PCI_D3hot);
8192
8193         return 0;
8194 }
8195
8196 static int iwl3945_pci_resume(struct pci_dev *pdev)
8197 {
8198         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8199
8200         pci_set_power_state(pdev, PCI_D0);
8201
8202         if (priv->is_open)
8203                 iwl3945_mac_start(priv->hw);
8204
8205         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8206         return 0;
8207 }
8208
8209 #endif /* CONFIG_PM */
8210
8211 /*************** RFKILL FUNCTIONS **********/
8212 #ifdef CONFIG_IWL3945_RFKILL
8213 /* software rf-kill from user */
8214 static int iwl3945_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
8215 {
8216         struct iwl3945_priv *priv = data;
8217         int err = 0;
8218
8219         if (!priv->rfkill)
8220         return 0;
8221
8222         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
8223                 return 0;
8224
8225         IWL_DEBUG_RF_KILL("we recieved soft RFKILL set to state %d\n", state);
8226         mutex_lock(&priv->mutex);
8227
8228         switch (state) {
8229         case RFKILL_STATE_UNBLOCKED:
8230                 if (iwl3945_is_rfkill_hw(priv)) {
8231                         err = -EBUSY;
8232                         goto out_unlock;
8233                 }
8234                 iwl3945_radio_kill_sw(priv, 0);
8235                 break;
8236         case RFKILL_STATE_SOFT_BLOCKED:
8237                 iwl3945_radio_kill_sw(priv, 1);
8238                 break;
8239         default:
8240                 IWL_WARNING("we recieved unexpected RFKILL state %d\n", state);
8241                 break;
8242         }
8243 out_unlock:
8244         mutex_unlock(&priv->mutex);
8245
8246         return err;
8247 }
8248
8249 int iwl3945_rfkill_init(struct iwl3945_priv *priv)
8250 {
8251         struct device *device = wiphy_dev(priv->hw->wiphy);
8252         int ret = 0;
8253
8254         BUG_ON(device == NULL);
8255
8256         IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
8257         priv->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
8258         if (!priv->rfkill) {
8259                 IWL_ERROR("Unable to allocate rfkill device.\n");
8260                 ret = -ENOMEM;
8261                 goto error;
8262         }
8263
8264         priv->rfkill->name = priv->cfg->name;
8265         priv->rfkill->data = priv;
8266         priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
8267         priv->rfkill->toggle_radio = iwl3945_rfkill_soft_rf_kill;
8268         priv->rfkill->user_claim_unsupported = 1;
8269
8270         priv->rfkill->dev.class->suspend = NULL;
8271         priv->rfkill->dev.class->resume = NULL;
8272
8273         ret = rfkill_register(priv->rfkill);
8274         if (ret) {
8275                 IWL_ERROR("Unable to register rfkill: %d\n", ret);
8276                 goto freed_rfkill;
8277         }
8278
8279         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8280         return ret;
8281
8282 freed_rfkill:
8283         if (priv->rfkill != NULL)
8284                 rfkill_free(priv->rfkill);
8285         priv->rfkill = NULL;
8286
8287 error:
8288         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8289         return ret;
8290 }
8291
8292 void iwl3945_rfkill_unregister(struct iwl3945_priv *priv)
8293 {
8294         if (priv->rfkill)
8295                 rfkill_unregister(priv->rfkill);
8296
8297         priv->rfkill = NULL;
8298 }
8299
8300 /* set rf-kill to the right state. */
8301 void iwl3945_rfkill_set_hw_state(struct iwl3945_priv *priv)
8302 {
8303
8304         if (!priv->rfkill)
8305                 return;
8306
8307         if (iwl3945_is_rfkill_hw(priv)) {
8308                 rfkill_force_state(priv->rfkill, RFKILL_STATE_HARD_BLOCKED);
8309                 return;
8310         }
8311
8312         if (!iwl3945_is_rfkill_sw(priv))
8313                 rfkill_force_state(priv->rfkill, RFKILL_STATE_UNBLOCKED);
8314         else
8315                 rfkill_force_state(priv->rfkill, RFKILL_STATE_SOFT_BLOCKED);
8316 }
8317 #endif
8318
8319 /*****************************************************************************
8320  *
8321  * driver and module entry point
8322  *
8323  *****************************************************************************/
8324
8325 static struct pci_driver iwl3945_driver = {
8326         .name = DRV_NAME,
8327         .id_table = iwl3945_hw_card_ids,
8328         .probe = iwl3945_pci_probe,
8329         .remove = __devexit_p(iwl3945_pci_remove),
8330 #ifdef CONFIG_PM
8331         .suspend = iwl3945_pci_suspend,
8332         .resume = iwl3945_pci_resume,
8333 #endif
8334 };
8335
8336 static int __init iwl3945_init(void)
8337 {
8338
8339         int ret;
8340         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8341         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8342
8343         ret = iwl3945_rate_control_register();
8344         if (ret) {
8345                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8346                 return ret;
8347         }
8348
8349         ret = pci_register_driver(&iwl3945_driver);
8350         if (ret) {
8351                 IWL_ERROR("Unable to initialize PCI module\n");
8352                 goto error_register;
8353         }
8354 #ifdef CONFIG_IWL3945_DEBUG
8355         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8356         if (ret) {
8357                 IWL_ERROR("Unable to create driver sysfs file\n");
8358                 goto error_debug;
8359         }
8360 #endif
8361
8362         return ret;
8363
8364 #ifdef CONFIG_IWL3945_DEBUG
8365 error_debug:
8366         pci_unregister_driver(&iwl3945_driver);
8367 #endif
8368 error_register:
8369         iwl3945_rate_control_unregister();
8370         return ret;
8371 }
8372
8373 static void __exit iwl3945_exit(void)
8374 {
8375 #ifdef CONFIG_IWL3945_DEBUG
8376         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8377 #endif
8378         pci_unregister_driver(&iwl3945_driver);
8379         iwl3945_rate_control_unregister();
8380 }
8381
8382 MODULE_FIRMWARE("iwlwifi-3945" IWL3945_UCODE_API ".ucode");
8383
8384 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8385 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8386 module_param_named(disable, iwl3945_param_disable, int, 0444);
8387 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8388 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8389 MODULE_PARM_DESC(hwcrypto,
8390                  "using hardware crypto engine (default 0 [software])\n");
8391 module_param_named(debug, iwl3945_param_debug, int, 0444);
8392 MODULE_PARM_DESC(debug, "debug output mask");
8393 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8394 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8395
8396 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8397 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8398
8399 /* QoS */
8400 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8401 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8402
8403 module_exit(iwl3945_exit);
8404 module_init(iwl3945_init);