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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #include "iwl-3945-core.h"
  50 #include "iwl-3945.h"
  51 #include "iwl-helpers.h"
  52
  53 #ifdef CONFIG_IWL3945_DEBUG
  54 u32 iwl3945_debug_level;
  55 #endif
  56
  57 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  58                                   struct iwl3945_tx_queue *txq);
  59
  60 /******************************************************************************
  61  *
  62  * module boiler plate
  63  *
  64  ******************************************************************************/
  65
  66 /* module parameters */
  67 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  68 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  69 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  70 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  71 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  72 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  73 int iwl3945_param_queues_num = IWL39_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  74
  75 /*
  76  * module name, copyright, version, etc.
  77  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  78  */
  79
  80 #define DRV_DESCRIPTION \
  81 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  82
  83 #ifdef CONFIG_IWL3945_DEBUG
  84 #define VD "d"
  85 #else
  86 #define VD
  87 #endif
  88
  89 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  90 #define VS "s"
  91 #else
  92 #define VS
  93 #endif
  94
  95 #define IWLWIFI_VERSION "1.2.26k" VD VS
  96 #define DRV_COPYRIGHT   "Copyright(c) 2003-2008 Intel Corporation"
  97 #define DRV_VERSION     IWLWIFI_VERSION
  98
  99
 100 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 101 MODULE_VERSION(DRV_VERSION);
 102 MODULE_AUTHOR(DRV_COPYRIGHT);
 103 MODULE_LICENSE("GPL");
 104
 105 static const struct ieee80211_supported_band *iwl3945_get_band(
 106                 struct iwl3945_priv *priv, enum ieee80211_band band)
 107 {
 108         return priv->hw->wiphy->bands[band];
 109 }
 110
 111 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 112 {
 113         /* Single white space is for Linksys APs */
 114         if (essid_len == 1 && essid[0] == ' ')
 115                 return 1;
 116
 117         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 118         while (essid_len) {
 119                 essid_len--;
 120                 if (essid[essid_len] != '\0')
 121                         return 0;
 122         }
 123
 124         return 1;
 125 }
 126
 127 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 128 {
 129         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 130         const char *s = essid;
 131         char *d = escaped;
 132
 133         if (iwl3945_is_empty_essid(essid, essid_len)) {
 134                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 135                 return escaped;
 136         }
 137
 138         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 139         while (essid_len--) {
 140                 if (*s == '\0') {
 141                         *d++ = '\\';
 142                         *d++ = '0';
 143                         s++;
 144                 } else
 145                         *d++ = *s++;
 146         }
 147         *d = '\0';
 148         return escaped;
 149 }
 150
 151 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 152  * DMA services
 153  *
 154  * Theory of operation
 155  *
 156  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 157  * of buffer descriptors, each of which points to one or more data buffers for
 158  * the device to read from or fill.  Driver and device exchange status of each
 159  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 160  * entries in each circular buffer, to protect against confusing empty and full
 161  * queue states.
 162  *
 163  * The device reads or writes the data in the queues via the device's several
 164  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 165  *
 166  * For Tx queue, there are low mark and high mark limits. If, after queuing
 167  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 168  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 169  * Tx queue resumed.
 170  *
 171  * The 3945 operates with six queues:  One receive queue, one transmit queue
 172  * (#4) for sending commands to the device firmware, and four transmit queues
 173  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 174  ***************************************************/
 175
 176 int iwl3945_queue_space(const struct iwl3945_queue *q)
 177 {
 178         int s = q->read_ptr - q->write_ptr;
 179
 180         if (q->read_ptr > q->write_ptr)
 181                 s -= q->n_bd;
 182
 183         if (s <= 0)
 184                 s += q->n_window;
 185         /* keep some reserve to not confuse empty and full situations */
 186         s -= 2;
 187         if (s < 0)
 188                 s = 0;
 189         return s;
 190 }
 191
 192 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 193 {
 194         return q->write_ptr > q->read_ptr ?
 195                 (i >= q->read_ptr && i < q->write_ptr) :
 196                 !(i < q->read_ptr && i >= q->write_ptr);
 197 }
 198
 199
 200 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 201 {
 202         /* This is for scan command, the big buffer at end of command array */
 203         if (is_huge)
 204                 return q->n_window;     /* must be power of 2 */
 205
 206         /* Otherwise, use normal size buffers */
 207         return index & (q->n_window - 1);
 208 }
 209
 210 /**
 211  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 212  */
 213 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 214                           int count, int slots_num, u32 id)
 215 {
 216         q->n_bd = count;
 217         q->n_window = slots_num;
 218         q->id = id;
 219
 220         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 221          * and iwl_queue_dec_wrap are broken. */
 222         BUG_ON(!is_power_of_2(count));
 223
 224         /* slots_num must be power-of-two size, otherwise
 225          * get_cmd_index is broken. */
 226         BUG_ON(!is_power_of_2(slots_num));
 227
 228         q->low_mark = q->n_window / 4;
 229         if (q->low_mark < 4)
 230                 q->low_mark = 4;
 231
 232         q->high_mark = q->n_window / 8;
 233         if (q->high_mark < 2)
 234                 q->high_mark = 2;
 235
 236         q->write_ptr = q->read_ptr = 0;
 237
 238         return 0;
 239 }
 240
 241 /**
 242  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 243  */
 244 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 245                               struct iwl3945_tx_queue *txq, u32 id)
 246 {
 247         struct pci_dev *dev = priv->pci_dev;
 248
 249         /* Driver private data, only for Tx (not command) queues,
 250          * not shared with device. */
 251         if (id != IWL_CMD_QUEUE_NUM) {
 252                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 253                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 254                 if (!txq->txb) {
 255                         IWL_ERROR("kmalloc for auxiliary BD "
 256                                   "structures failed\n");
 257                         goto error;
 258                 }
 259         } else
 260                 txq->txb = NULL;
 261
 262         /* Circular buffer of transmit frame descriptors (TFDs),
 263          * shared with device */
 264         txq->bd = pci_alloc_consistent(dev,
 265                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 266                         &txq->q.dma_addr);
 267
 268         if (!txq->bd) {
 269                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 270                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 271                 goto error;
 272         }
 273         txq->q.id = id;
 274
 275         return 0;
 276
 277  error:
 278         if (txq->txb) {
 279                 kfree(txq->txb);
 280                 txq->txb = NULL;
 281         }
 282
 283         return -ENOMEM;
 284 }
 285
 286 /**
 287  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 288  */
 289 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 290                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 291 {
 292         struct pci_dev *dev = priv->pci_dev;
 293         int len;
 294         int rc = 0;
 295
 296         /*
 297          * Alloc buffer array for commands (Tx or other types of commands).
 298          * For the command queue (#4), allocate command space + one big
 299          * command for scan, since scan command is very huge; the system will
 300          * not have two scans at the same time, so only one is needed.
 301          * For data Tx queues (all other queues), no super-size command
 302          * space is needed.
 303          */
 304         len = sizeof(struct iwl3945_cmd) * slots_num;
 305         if (txq_id == IWL_CMD_QUEUE_NUM)
 306                 len +=  IWL_MAX_SCAN_SIZE;
 307         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 308         if (!txq->cmd)
 309                 return -ENOMEM;
 310
 311         /* Alloc driver data array and TFD circular buffer */
 312         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 313         if (rc) {
 314                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 315
 316                 return -ENOMEM;
 317         }
 318         txq->need_update = 0;
 319
 320         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 321          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 322         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 323
 324         /* Initialize queue high/low-water, head/tail indexes */
 325         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 326
 327         /* Tell device where to find queue, enable DMA channel. */
 328         iwl3945_hw_tx_queue_init(priv, txq);
 329
 330         return 0;
 331 }
 332
 333 /**
 334  * iwl3945_tx_queue_free - Deallocate DMA queue.
 335  * @txq: Transmit queue to deallocate.
 336  *
 337  * Empty queue by removing and destroying all BD's.
 338  * Free all buffers.
 339  * 0-fill, but do not free "txq" descriptor structure.
 340  */
 341 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 342 {
 343         struct iwl3945_queue *q = &txq->q;
 344         struct pci_dev *dev = priv->pci_dev;
 345         int len;
 346
 347         if (q->n_bd == 0)
 348                 return;
 349
 350         /* first, empty all BD's */
 351         for (; q->write_ptr != q->read_ptr;
 352              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 353                 iwl3945_hw_txq_free_tfd(priv, txq);
 354
 355         len = sizeof(struct iwl3945_cmd) * q->n_window;
 356         if (q->id == IWL_CMD_QUEUE_NUM)
 357                 len += IWL_MAX_SCAN_SIZE;
 358
 359         /* De-alloc array of command/tx buffers */
 360         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 361
 362         /* De-alloc circular buffer of TFDs */
 363         if (txq->q.n_bd)
 364                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 365                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 366
 367         /* De-alloc array of per-TFD driver data */
 368         if (txq->txb) {
 369                 kfree(txq->txb);
 370                 txq->txb = NULL;
 371         }
 372
 373         /* 0-fill queue descriptor structure */
 374         memset(txq, 0, sizeof(*txq));
 375 }
 376
 377 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 378
 379 /*************** STATION TABLE MANAGEMENT ****
 380  * mac80211 should be examined to determine if sta_info is duplicating
 381  * the functionality provided here
 382  */
 383
 384 /**************************************************************/
 385 #if 0 /* temporary disable till we add real remove station */
 386 /**
 387  * iwl3945_remove_station - Remove driver's knowledge of station.
 388  *
 389  * NOTE:  This does not remove station from device's station table.
 390  */
 391 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 392 {
 393         int index = IWL_INVALID_STATION;
 394         int i;
 395         unsigned long flags;
 396
 397         spin_lock_irqsave(&priv->sta_lock, flags);
 398
 399         if (is_ap)
 400                 index = IWL_AP_ID;
 401         else if (is_broadcast_ether_addr(addr))
 402                 index = priv->hw_setting.bcast_sta_id;
 403         else
 404                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 405                         if (priv->stations[i].used &&
 406                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 407                                                 addr)) {
 408                                 index = i;
 409                                 break;
 410                         }
 411
 412         if (unlikely(index == IWL_INVALID_STATION))
 413                 goto out;
 414
 415         if (priv->stations[index].used) {
 416                 priv->stations[index].used = 0;
 417                 priv->num_stations--;
 418         }
 419
 420         BUG_ON(priv->num_stations < 0);
 421
 422 out:
 423         spin_unlock_irqrestore(&priv->sta_lock, flags);
 424         return 0;
 425 }
 426 #endif
 427
 428 /**
 429  * iwl3945_clear_stations_table - Clear the driver's station table
 430  *
 431  * NOTE:  This does not clear or otherwise alter the device's station table.
 432  */
 433 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 434 {
 435         unsigned long flags;
 436
 437         spin_lock_irqsave(&priv->sta_lock, flags);
 438
 439         priv->num_stations = 0;
 440         memset(priv->stations, 0, sizeof(priv->stations));
 441
 442         spin_unlock_irqrestore(&priv->sta_lock, flags);
 443 }
 444
 445 /**
 446  * iwl3945_add_station - Add station to station tables in driver and device
 447  */
 448 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 449 {
 450         int i;
 451         int index = IWL_INVALID_STATION;
 452         struct iwl3945_station_entry *station;
 453         unsigned long flags_spin;
 454         DECLARE_MAC_BUF(mac);
 455         u8 rate;
 456
 457         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 458         if (is_ap)
 459                 index = IWL_AP_ID;
 460         else if (is_broadcast_ether_addr(addr))
 461                 index = priv->hw_setting.bcast_sta_id;
 462         else
 463                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 464                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 465                                                 addr)) {
 466                                 index = i;
 467                                 break;
 468                         }
 469
 470                         if (!priv->stations[i].used &&
 471                             index == IWL_INVALID_STATION)
 472                                 index = i;
 473                 }
 474
 475         /* These two conditions has the same outcome but keep them separate
 476           since they have different meaning */
 477         if (unlikely(index == IWL_INVALID_STATION)) {
 478                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 479                 return index;
 480         }
 481
 482         if (priv->stations[index].used &&
 483            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 484                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 485                 return index;
 486         }
 487
 488         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 489         station = &priv->stations[index];
 490         station->used = 1;
 491         priv->num_stations++;
 492
 493         /* Set up the REPLY_ADD_STA command to send to device */
 494         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 495         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 496         station->sta.mode = 0;
 497         station->sta.sta.sta_id = index;
 498         station->sta.station_flags = 0;
 499
 500         if (priv->band == IEEE80211_BAND_5GHZ)
 501                 rate = IWL_RATE_6M_PLCP;
 502         else
 503                 rate =  IWL_RATE_1M_PLCP;
 504
 505         /* Turn on both antennas for the station... */
 506         station->sta.rate_n_flags =
 507                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 508         station->current_rate.rate_n_flags =
 509                         le16_to_cpu(station->sta.rate_n_flags);
 510
 511         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 512
 513         /* Add station to device's station table */
 514         iwl3945_send_add_station(priv, &station->sta, flags);
 515         return index;
 516
 517 }
 518
 519 /*************** DRIVER STATUS FUNCTIONS   *****/
 520
 521 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 522 {
 523         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 524          * set but EXIT_PENDING is not */
 525         return test_bit(STATUS_READY, &priv->status) &&
 526                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 527                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 528 }
 529
 530 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 531 {
 532         return test_bit(STATUS_ALIVE, &priv->status);
 533 }
 534
 535 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 536 {
 537         return test_bit(STATUS_INIT, &priv->status);
 538 }
 539
 540 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 541 {
 542         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 543                test_bit(STATUS_RF_KILL_SW, &priv->status);
 544 }
 545
 546 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 547 {
 548
 549         if (iwl3945_is_rfkill(priv))
 550                 return 0;
 551
 552         return iwl3945_is_ready(priv);
 553 }
 554
 555 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 556
 557 #define IWL_CMD(x) case x : return #x
 558
 559 static const char *get_cmd_string(u8 cmd)
 560 {
 561         switch (cmd) {
 562                 IWL_CMD(REPLY_ALIVE);
 563                 IWL_CMD(REPLY_ERROR);
 564                 IWL_CMD(REPLY_RXON);
 565                 IWL_CMD(REPLY_RXON_ASSOC);
 566                 IWL_CMD(REPLY_QOS_PARAM);
 567                 IWL_CMD(REPLY_RXON_TIMING);
 568                 IWL_CMD(REPLY_ADD_STA);
 569                 IWL_CMD(REPLY_REMOVE_STA);
 570                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 571                 IWL_CMD(REPLY_3945_RX);
 572                 IWL_CMD(REPLY_TX);
 573                 IWL_CMD(REPLY_RATE_SCALE);
 574                 IWL_CMD(REPLY_LEDS_CMD);
 575                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 576                 IWL_CMD(RADAR_NOTIFICATION);
 577                 IWL_CMD(REPLY_QUIET_CMD);
 578                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 579                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 580                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 581                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 582                 IWL_CMD(POWER_TABLE_CMD);
 583                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 584                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 585                 IWL_CMD(REPLY_SCAN_CMD);
 586                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 587                 IWL_CMD(SCAN_START_NOTIFICATION);
 588                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 589                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 590                 IWL_CMD(BEACON_NOTIFICATION);
 591                 IWL_CMD(REPLY_TX_BEACON);
 592                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 593                 IWL_CMD(QUIET_NOTIFICATION);
 594                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 595                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 596                 IWL_CMD(REPLY_BT_CONFIG);
 597                 IWL_CMD(REPLY_STATISTICS_CMD);
 598                 IWL_CMD(STATISTICS_NOTIFICATION);
 599                 IWL_CMD(REPLY_CARD_STATE_CMD);
 600                 IWL_CMD(CARD_STATE_NOTIFICATION);
 601                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 602         default:
 603                 return "UNKNOWN";
 604
 605         }
 606 }
 607
 608 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 609
 610 /**
 611  * iwl3945_enqueue_hcmd - enqueue a uCode command
 612  * @priv: device private data point
 613  * @cmd: a point to the ucode command structure
 614  *
 615  * The function returns < 0 values to indicate the operation is
 616  * failed. On success, it turns the index (> 0) of command in the
 617  * command queue.
 618  */
 619 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 620 {
 621         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 622         struct iwl3945_queue *q = &txq->q;
 623         struct iwl3945_tfd_frame *tfd;
 624         u32 *control_flags;
 625         struct iwl3945_cmd *out_cmd;
 626         u32 idx;
 627         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 628         dma_addr_t phys_addr;
 629         int pad;
 630         u16 count;
 631         int ret;
 632         unsigned long flags;
 633
 634         /* If any of the command structures end up being larger than
 635          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 636          * we will need to increase the size of the TFD entries */
 637         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 638                !(cmd->meta.flags & CMD_SIZE_HUGE));
 639
 640
 641         if (iwl3945_is_rfkill(priv)) {
 642                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 643                 return -EIO;
 644         }
 645
 646         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 647                 IWL_ERROR("No space for Tx\n");
 648                 return -ENOSPC;
 649         }
 650
 651         spin_lock_irqsave(&priv->hcmd_lock, flags);
 652
 653         tfd = &txq->bd[q->write_ptr];
 654         memset(tfd, 0, sizeof(*tfd));
 655
 656         control_flags = (u32 *) tfd;
 657
 658         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 659         out_cmd = &txq->cmd[idx];
 660
 661         out_cmd->hdr.cmd = cmd->id;
 662         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 663         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 664
 665         /* At this point, the out_cmd now has all of the incoming cmd
 666          * information */
 667
 668         out_cmd->hdr.flags = 0;
 669         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 670                         INDEX_TO_SEQ(q->write_ptr));
 671         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 672                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 673
 674         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 675                         offsetof(struct iwl3945_cmd, hdr);
 676         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 677
 678         pad = U32_PAD(cmd->len);
 679         count = TFD_CTL_COUNT_GET(*control_flags);
 680         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 681
 682         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 683                      "%d bytes at %d[%d]:%d\n",
 684                      get_cmd_string(out_cmd->hdr.cmd),
 685                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 686                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 687
 688         txq->need_update = 1;
 689
 690         /* Increment and update queue's write index */
 691         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 692         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 693
 694         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 695         return ret ? ret : idx;
 696 }
 697
 698 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 699 {
 700         int ret;
 701
 702         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 703
 704         /* An asynchronous command can not expect an SKB to be set. */
 705         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 706
 707         /* An asynchronous command MUST have a callback. */
 708         BUG_ON(!cmd->meta.u.callback);
 709
 710         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 711                 return -EBUSY;
 712
 713         ret = iwl3945_enqueue_hcmd(priv, cmd);
 714         if (ret < 0) {
 715                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 716                           get_cmd_string(cmd->id), ret);
 717                 return ret;
 718         }
 719         return 0;
 720 }
 721
 722 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 723 {
 724         int cmd_idx;
 725         int ret;
 726
 727         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 728
 729          /* A synchronous command can not have a callback set. */
 730         BUG_ON(cmd->meta.u.callback != NULL);
 731
 732         if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
 733                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 734                           get_cmd_string(cmd->id));
 735                 ret = -EBUSY;
 736                 goto out;
 737         }
 738
 739         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 740
 741         if (cmd->meta.flags & CMD_WANT_SKB)
 742                 cmd->meta.source = &cmd->meta;
 743
 744         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 745         if (cmd_idx < 0) {
 746                 ret = cmd_idx;
 747                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 748                           get_cmd_string(cmd->id), ret);
 749                 goto out;
 750         }
 751
 752         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 753                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 754                         HOST_COMPLETE_TIMEOUT);
 755         if (!ret) {
 756                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 757                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 758                                   get_cmd_string(cmd->id),
 759                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 760
 761                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 762                         ret = -ETIMEDOUT;
 763                         goto cancel;
 764                 }
 765         }
 766
 767         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 768                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 769                                get_cmd_string(cmd->id));
 770                 ret = -ECANCELED;
 771                 goto fail;
 772         }
 773         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 774                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 775                                get_cmd_string(cmd->id));
 776                 ret = -EIO;
 777                 goto fail;
 778         }
 779         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 780                 IWL_ERROR("Error: Response NULL in '%s'\n",
 781                           get_cmd_string(cmd->id));
 782                 ret = -EIO;
 783                 goto out;
 784         }
 785
 786         ret = 0;
 787         goto out;
 788
 789 cancel:
 790         if (cmd->meta.flags & CMD_WANT_SKB) {
 791                 struct iwl3945_cmd *qcmd;
 792
 793                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 794                  * TX cmd queue. Otherwise in case the cmd comes
 795                  * in later, it will possibly set an invalid
 796                  * address (cmd->meta.source). */
 797                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 798                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 799         }
 800 fail:
 801         if (cmd->meta.u.skb) {
 802                 dev_kfree_skb_any(cmd->meta.u.skb);
 803                 cmd->meta.u.skb = NULL;
 804         }
 805 out:
 806         clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
 807         return ret;
 808 }
 809
 810 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 811 {
 812         if (cmd->meta.flags & CMD_ASYNC)
 813                 return iwl3945_send_cmd_async(priv, cmd);
 814
 815         return iwl3945_send_cmd_sync(priv, cmd);
 816 }
 817
 818 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 819 {
 820         struct iwl3945_host_cmd cmd = {
 821                 .id = id,
 822                 .len = len,
 823                 .data = data,
 824         };
 825
 826         return iwl3945_send_cmd_sync(priv, &cmd);
 827 }
 828
 829 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 830 {
 831         struct iwl3945_host_cmd cmd = {
 832                 .id = id,
 833                 .len = sizeof(val),
 834                 .data = &val,
 835         };
 836
 837         return iwl3945_send_cmd_sync(priv, &cmd);
 838 }
 839
 840 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 841 {
 842         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 843 }
 844
 845 /**
 846  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 847  * @band: 2.4 or 5 GHz band
 848  * @channel: Any channel valid for the requested band
 849
 850  * In addition to setting the staging RXON, priv->band is also set.
 851  *
 852  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 853  * in the staging RXON flag structure based on the band
 854  */
 855 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 856                                     enum ieee80211_band band,
 857                                     u16 channel)
 858 {
 859         if (!iwl3945_get_channel_info(priv, band, channel)) {
 860                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 861                                channel, band);
 862                 return -EINVAL;
 863         }
 864
 865         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 866             (priv->band == band))
 867                 return 0;
 868
 869         priv->staging_rxon.channel = cpu_to_le16(channel);
 870         if (band == IEEE80211_BAND_5GHZ)
 871                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 872         else
 873                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 874
 875         priv->band = band;
 876
 877         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 878
 879         return 0;
 880 }
 881
 882 /**
 883  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 884  *
 885  * NOTE:  This is really only useful during development and can eventually
 886  * be #ifdef'd out once the driver is stable and folks aren't actively
 887  * making changes
 888  */
 889 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 890 {
 891         int error = 0;
 892         int counter = 1;
 893
 894         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 895                 error |= le32_to_cpu(rxon->flags &
 896                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 897                                  RXON_FLG_RADAR_DETECT_MSK));
 898                 if (error)
 899                         IWL_WARNING("check 24G fields %d | %d\n",
 900                                     counter++, error);
 901         } else {
 902                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 903                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 904                 if (error)
 905                         IWL_WARNING("check 52 fields %d | %d\n",
 906                                     counter++, error);
 907                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 908                 if (error)
 909                         IWL_WARNING("check 52 CCK %d | %d\n",
 910                                     counter++, error);
 911         }
 912         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 913         if (error)
 914                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 915
 916         /* make sure basic rates 6Mbps and 1Mbps are supported */
 917         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 918                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 919         if (error)
 920                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 921
 922         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 923         if (error)
 924                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 925
 926         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 927                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 928         if (error)
 929                 IWL_WARNING("check CCK and short slot %d | %d\n",
 930                             counter++, error);
 931
 932         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 933                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 934         if (error)
 935                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 936                             counter++, error);
 937
 938         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 939                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 940         if (error)
 941                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 942                             counter++, error);
 943
 944         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 945                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 946                                 RXON_FLG_ANT_A_MSK)) == 0);
 947         if (error)
 948                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 949
 950         if (error)
 951                 IWL_WARNING("Tuning to channel %d\n",
 952                             le16_to_cpu(rxon->channel));
 953
 954         if (error) {
 955                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 956                 return -1;
 957         }
 958         return 0;
 959 }
 960
 961 /**
 962  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 963  * @priv: staging_rxon is compared to active_rxon
 964  *
 965  * If the RXON structure is changing enough to require a new tune,
 966  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 967  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 968  */
 969 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
 970 {
 971
 972         /* These items are only settable from the full RXON command */
 973         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 974             compare_ether_addr(priv->staging_rxon.bssid_addr,
 975                                priv->active_rxon.bssid_addr) ||
 976             compare_ether_addr(priv->staging_rxon.node_addr,
 977                                priv->active_rxon.node_addr) ||
 978             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 979                                priv->active_rxon.wlap_bssid_addr) ||
 980             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 981             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 982             (priv->staging_rxon.air_propagation !=
 983              priv->active_rxon.air_propagation) ||
 984             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 985                 return 1;
 986
 987         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 988          * be updated with the RXON_ASSOC command -- however only some
 989          * flag transitions are allowed using RXON_ASSOC */
 990
 991         /* Check if we are not switching bands */
 992         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 993             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 994                 return 1;
 995
 996         /* Check if we are switching association toggle */
 997         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 998                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 999                 return 1;
1000
1001         return 0;
1002 }
1003
1004 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1005 {
1006         int rc = 0;
1007         struct iwl3945_rx_packet *res = NULL;
1008         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1009         struct iwl3945_host_cmd cmd = {
1010                 .id = REPLY_RXON_ASSOC,
1011                 .len = sizeof(rxon_assoc),
1012                 .meta.flags = CMD_WANT_SKB,
1013                 .data = &rxon_assoc,
1014         };
1015         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1016         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1017
1018         if ((rxon1->flags == rxon2->flags) &&
1019             (rxon1->filter_flags == rxon2->filter_flags) &&
1020             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1021             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1022                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1023                 return 0;
1024         }
1025
1026         rxon_assoc.flags = priv->staging_rxon.flags;
1027         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1028         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1029         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1030         rxon_assoc.reserved = 0;
1031
1032         rc = iwl3945_send_cmd_sync(priv, &cmd);
1033         if (rc)
1034                 return rc;
1035
1036         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1037         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1038                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1039                 rc = -EIO;
1040         }
1041
1042         priv->alloc_rxb_skb--;
1043         dev_kfree_skb_any(cmd.meta.u.skb);
1044
1045         return rc;
1046 }
1047
1048 /**
1049  * iwl3945_commit_rxon - commit staging_rxon to hardware
1050  *
1051  * The RXON command in staging_rxon is committed to the hardware and
1052  * the active_rxon structure is updated with the new data.  This
1053  * function correctly transitions out of the RXON_ASSOC_MSK state if
1054  * a HW tune is required based on the RXON structure changes.
1055  */
1056 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1057 {
1058         /* cast away the const for active_rxon in this function */
1059         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1060         int rc = 0;
1061         DECLARE_MAC_BUF(mac);
1062
1063         if (!iwl3945_is_alive(priv))
1064                 return -1;
1065
1066         /* always get timestamp with Rx frame */
1067         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1068
1069         /* select antenna */
1070         priv->staging_rxon.flags &=
1071             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1072         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1073
1074         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1075         if (rc) {
1076                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1077                 return -EINVAL;
1078         }
1079
1080         /* If we don't need to send a full RXON, we can use
1081          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1082          * and other flags for the current radio configuration. */
1083         if (!iwl3945_full_rxon_required(priv)) {
1084                 rc = iwl3945_send_rxon_assoc(priv);
1085                 if (rc) {
1086                         IWL_ERROR("Error setting RXON_ASSOC "
1087                                   "configuration (%d).\n", rc);
1088                         return rc;
1089                 }
1090
1091                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1092
1093                 return 0;
1094         }
1095
1096         /* If we are currently associated and the new config requires
1097          * an RXON_ASSOC and the new config wants the associated mask enabled,
1098          * we must clear the associated from the active configuration
1099          * before we apply the new config */
1100         if (iwl3945_is_associated(priv) &&
1101             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1102                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1103                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1104
1105                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1106                                       sizeof(struct iwl3945_rxon_cmd),
1107                                       &priv->active_rxon);
1108
1109                 /* If the mask clearing failed then we set
1110                  * active_rxon back to what it was previously */
1111                 if (rc) {
1112                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1113                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1114                                   "configuration (%d).\n", rc);
1115                         return rc;
1116                 }
1117         }
1118
1119         IWL_DEBUG_INFO("Sending RXON\n"
1120                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1121                        "* channel = %d\n"
1122                        "* bssid = %s\n",
1123                        ((priv->staging_rxon.filter_flags &
1124                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1125                        le16_to_cpu(priv->staging_rxon.channel),
1126                        print_mac(mac, priv->staging_rxon.bssid_addr));
1127
1128         /* Apply the new configuration */
1129         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1130                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1131         if (rc) {
1132                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1133                 return rc;
1134         }
1135
1136         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1137
1138         iwl3945_clear_stations_table(priv);
1139
1140         /* If we issue a new RXON command which required a tune then we must
1141          * send a new TXPOWER command or we won't be able to Tx any frames */
1142         rc = iwl3945_hw_reg_send_txpower(priv);
1143         if (rc) {
1144                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1145                 return rc;
1146         }
1147
1148         /* Add the broadcast address so we can send broadcast frames */
1149         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1150             IWL_INVALID_STATION) {
1151                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1152                 return -EIO;
1153         }
1154
1155         /* If we have set the ASSOC_MSK and we are in BSS mode then
1156          * add the IWL_AP_ID to the station rate table */
1157         if (iwl3945_is_associated(priv) &&
1158             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1159                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1160                     == IWL_INVALID_STATION) {
1161                         IWL_ERROR("Error adding AP address for transmit.\n");
1162                         return -EIO;
1163                 }
1164
1165         /* Init the hardware's rate fallback order based on the band */
1166         rc = iwl3945_init_hw_rate_table(priv);
1167         if (rc) {
1168                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1169                 return -EIO;
1170         }
1171
1172         return 0;
1173 }
1174
1175 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1176 {
1177         struct iwl3945_bt_cmd bt_cmd = {
1178                 .flags = 3,
1179                 .lead_time = 0xAA,
1180                 .max_kill = 1,
1181                 .kill_ack_mask = 0,
1182                 .kill_cts_mask = 0,
1183         };
1184
1185         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1186                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1187 }
1188
1189 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1190 {
1191         int rc = 0;
1192         struct iwl3945_rx_packet *res;
1193         struct iwl3945_host_cmd cmd = {
1194                 .id = REPLY_SCAN_ABORT_CMD,
1195                 .meta.flags = CMD_WANT_SKB,
1196         };
1197
1198         /* If there isn't a scan actively going on in the hardware
1199          * then we are in between scan bands and not actually
1200          * actively scanning, so don't send the abort command */
1201         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1202                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1203                 return 0;
1204         }
1205
1206         rc = iwl3945_send_cmd_sync(priv, &cmd);
1207         if (rc) {
1208                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1209                 return rc;
1210         }
1211
1212         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1213         if (res->u.status != CAN_ABORT_STATUS) {
1214                 /* The scan abort will return 1 for success or
1215                  * 2 for "failure".  A failure condition can be
1216                  * due to simply not being in an active scan which
1217                  * can occur if we send the scan abort before we
1218                  * the microcode has notified us that a scan is
1219                  * completed. */
1220                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1221                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1222                 clear_bit(STATUS_SCAN_HW, &priv->status);
1223         }
1224
1225         dev_kfree_skb_any(cmd.meta.u.skb);
1226
1227         return rc;
1228 }
1229
1230 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1231                                         struct iwl3945_cmd *cmd,
1232                                         struct sk_buff *skb)
1233 {
1234         return 1;
1235 }
1236
1237 /*
1238  * CARD_STATE_CMD
1239  *
1240  * Use: Sets the device's internal card state to enable, disable, or halt
1241  *
1242  * When in the 'enable' state the card operates as normal.
1243  * When in the 'disable' state, the card enters into a low power mode.
1244  * When in the 'halt' state, the card is shut down and must be fully
1245  * restarted to come back on.
1246  */
1247 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1248 {
1249         struct iwl3945_host_cmd cmd = {
1250                 .id = REPLY_CARD_STATE_CMD,
1251                 .len = sizeof(u32),
1252                 .data = &flags,
1253                 .meta.flags = meta_flag,
1254         };
1255
1256         if (meta_flag & CMD_ASYNC)
1257                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1258
1259         return iwl3945_send_cmd(priv, &cmd);
1260 }
1261
1262 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1263                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1264 {
1265         struct iwl3945_rx_packet *res = NULL;
1266
1267         if (!skb) {
1268                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1269                 return 1;
1270         }
1271
1272         res = (struct iwl3945_rx_packet *)skb->data;
1273         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1274                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1275                           res->hdr.flags);
1276                 return 1;
1277         }
1278
1279         switch (res->u.add_sta.status) {
1280         case ADD_STA_SUCCESS_MSK:
1281                 break;
1282         default:
1283                 break;
1284         }
1285
1286         /* We didn't cache the SKB; let the caller free it */
1287         return 1;
1288 }
1289
1290 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1291                          struct iwl3945_addsta_cmd *sta, u8 flags)
1292 {
1293         struct iwl3945_rx_packet *res = NULL;
1294         int rc = 0;
1295         struct iwl3945_host_cmd cmd = {
1296                 .id = REPLY_ADD_STA,
1297                 .len = sizeof(struct iwl3945_addsta_cmd),
1298                 .meta.flags = flags,
1299                 .data = sta,
1300         };
1301
1302         if (flags & CMD_ASYNC)
1303                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1304         else
1305                 cmd.meta.flags |= CMD_WANT_SKB;
1306
1307         rc = iwl3945_send_cmd(priv, &cmd);
1308
1309         if (rc || (flags & CMD_ASYNC))
1310                 return rc;
1311
1312         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1313         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1314                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1315                           res->hdr.flags);
1316                 rc = -EIO;
1317         }
1318
1319         if (rc == 0) {
1320                 switch (res->u.add_sta.status) {
1321                 case ADD_STA_SUCCESS_MSK:
1322                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1323                         break;
1324                 default:
1325                         rc = -EIO;
1326                         IWL_WARNING("REPLY_ADD_STA failed\n");
1327                         break;
1328                 }
1329         }
1330
1331         priv->alloc_rxb_skb--;
1332         dev_kfree_skb_any(cmd.meta.u.skb);
1333
1334         return rc;
1335 }
1336
1337 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1338                                    struct ieee80211_key_conf *keyconf,
1339                                    u8 sta_id)
1340 {
1341         unsigned long flags;
1342         __le16 key_flags = 0;
1343
1344         switch (keyconf->alg) {
1345         case ALG_CCMP:
1346                 key_flags |= STA_KEY_FLG_CCMP;
1347                 key_flags |= cpu_to_le16(
1348                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1349                 key_flags &= ~STA_KEY_FLG_INVALID;
1350                 break;
1351         case ALG_TKIP:
1352         case ALG_WEP:
1353         default:
1354                 return -EINVAL;
1355         }
1356         spin_lock_irqsave(&priv->sta_lock, flags);
1357         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1358         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1359         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1360                keyconf->keylen);
1361
1362         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1363                keyconf->keylen);
1364         priv->stations[sta_id].sta.key.key_flags = key_flags;
1365         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1366         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1367
1368         spin_unlock_irqrestore(&priv->sta_lock, flags);
1369
1370         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1371         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1372         return 0;
1373 }
1374
1375 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1376 {
1377         unsigned long flags;
1378
1379         spin_lock_irqsave(&priv->sta_lock, flags);
1380         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1381         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1382         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1383         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1384         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1385         spin_unlock_irqrestore(&priv->sta_lock, flags);
1386
1387         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1388         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1389         return 0;
1390 }
1391
1392 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1393 {
1394         struct list_head *element;
1395
1396         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1397                        priv->frames_count);
1398
1399         while (!list_empty(&priv->free_frames)) {
1400                 element = priv->free_frames.next;
1401                 list_del(element);
1402                 kfree(list_entry(element, struct iwl3945_frame, list));
1403                 priv->frames_count--;
1404         }
1405
1406         if (priv->frames_count) {
1407                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1408                             priv->frames_count);
1409                 priv->frames_count = 0;
1410         }
1411 }
1412
1413 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1414 {
1415         struct iwl3945_frame *frame;
1416         struct list_head *element;
1417         if (list_empty(&priv->free_frames)) {
1418                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1419                 if (!frame) {
1420                         IWL_ERROR("Could not allocate frame!\n");
1421                         return NULL;
1422                 }
1423
1424                 priv->frames_count++;
1425                 return frame;
1426         }
1427
1428         element = priv->free_frames.next;
1429         list_del(element);
1430         return list_entry(element, struct iwl3945_frame, list);
1431 }
1432
1433 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1434 {
1435         memset(frame, 0, sizeof(*frame));
1436         list_add(&frame->list, &priv->free_frames);
1437 }
1438
1439 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1440                                 struct ieee80211_hdr *hdr,
1441                                 const u8 *dest, int left)
1442 {
1443
1444         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1445             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1446              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1447                 return 0;
1448
1449         if (priv->ibss_beacon->len > left)
1450                 return 0;
1451
1452         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1453
1454         return priv->ibss_beacon->len;
1455 }
1456
1457 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1458 {
1459         u8 i;
1460
1461         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1462              i = iwl3945_rates[i].next_ieee) {
1463                 if (rate_mask & (1 << i))
1464                         return iwl3945_rates[i].plcp;
1465         }
1466
1467         return IWL_RATE_INVALID;
1468 }
1469
1470 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1471 {
1472         struct iwl3945_frame *frame;
1473         unsigned int frame_size;
1474         int rc;
1475         u8 rate;
1476
1477         frame = iwl3945_get_free_frame(priv);
1478
1479         if (!frame) {
1480                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1481                           "command.\n");
1482                 return -ENOMEM;
1483         }
1484
1485         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1486                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1487                                                 0xFF0);
1488                 if (rate == IWL_INVALID_RATE)
1489                         rate = IWL_RATE_6M_PLCP;
1490         } else {
1491                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1492                 if (rate == IWL_INVALID_RATE)
1493                         rate = IWL_RATE_1M_PLCP;
1494         }
1495
1496         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1497
1498         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1499                               &frame->u.cmd[0]);
1500
1501         iwl3945_free_frame(priv, frame);
1502
1503         return rc;
1504 }
1505
1506 /******************************************************************************
1507  *
1508  * EEPROM related functions
1509  *
1510  ******************************************************************************/
1511
1512 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1513 {
1514         memcpy(mac, priv->eeprom.mac_address, 6);
1515 }
1516
1517 /*
1518  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1519  * embedded controller) as EEPROM reader; each read is a series of pulses
1520  * to/from the EEPROM chip, not a single event, so even reads could conflict
1521  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1522  * simply claims ownership, which should be safe when this function is called
1523  * (i.e. before loading uCode!).
1524  */
1525 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1526 {
1527         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1528         return 0;
1529 }
1530
1531 /**
1532  * iwl3945_eeprom_init - read EEPROM contents
1533  *
1534  * Load the EEPROM contents from adapter into priv->eeprom
1535  *
1536  * NOTE:  This routine uses the non-debug IO access functions.
1537  */
1538 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1539 {
1540         u16 *e = (u16 *)&priv->eeprom;
1541         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1542         u32 r;
1543         int sz = sizeof(priv->eeprom);
1544         int rc;
1545         int i;
1546         u16 addr;
1547
1548         /* The EEPROM structure has several padding buffers within it
1549          * and when adding new EEPROM maps is subject to programmer errors
1550          * which may be very difficult to identify without explicitly
1551          * checking the resulting size of the eeprom map. */
1552         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1553
1554         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1555                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1556                 return -ENOENT;
1557         }
1558
1559         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1560         rc = iwl3945_eeprom_acquire_semaphore(priv);
1561         if (rc < 0) {
1562                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1563                 return -ENOENT;
1564         }
1565
1566         /* eeprom is an array of 16bit values */
1567         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1568                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1569                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1570
1571                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1572                                         i += IWL_EEPROM_ACCESS_DELAY) {
1573                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1574                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1575                                 break;
1576                         udelay(IWL_EEPROM_ACCESS_DELAY);
1577                 }
1578
1579                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1580                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1581                         return -ETIMEDOUT;
1582                 }
1583                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1584         }
1585
1586         return 0;
1587 }
1588
1589 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1590 {
1591         if (priv->hw_setting.shared_virt)
1592                 pci_free_consistent(priv->pci_dev,
1593                                     sizeof(struct iwl3945_shared),
1594                                     priv->hw_setting.shared_virt,
1595                                     priv->hw_setting.shared_phys);
1596 }
1597
1598 /**
1599  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1600  *
1601  * return : set the bit for each supported rate insert in ie
1602  */
1603 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1604                                     u16 basic_rate, int *left)
1605 {
1606         u16 ret_rates = 0, bit;
1607         int i;
1608         u8 *cnt = ie;
1609         u8 *rates = ie + 1;
1610
1611         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1612                 if (bit & supported_rate) {
1613                         ret_rates |= bit;
1614                         rates[*cnt] = iwl3945_rates[i].ieee |
1615                                 ((bit & basic_rate) ? 0x80 : 0x00);
1616                         (*cnt)++;
1617                         (*left)--;
1618                         if ((*left <= 0) ||
1619                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1620                                 break;
1621                 }
1622         }
1623
1624         return ret_rates;
1625 }
1626
1627 /**
1628  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1629  */
1630 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1631                               struct ieee80211_mgmt *frame,
1632                               int left, int is_direct)
1633 {
1634         int len = 0;
1635         u8 *pos = NULL;
1636         u16 active_rates, ret_rates, cck_rates;
1637
1638         /* Make sure there is enough space for the probe request,
1639          * two mandatory IEs and the data */
1640         left -= 24;
1641         if (left < 0)
1642                 return 0;
1643         len += 24;
1644
1645         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1646         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1647         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1648         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1649         frame->seq_ctrl = 0;
1650
1651         /* fill in our indirect SSID IE */
1652         /* ...next IE... */
1653
1654         left -= 2;
1655         if (left < 0)
1656                 return 0;
1657         len += 2;
1658         pos = &(frame->u.probe_req.variable[0]);
1659         *pos++ = WLAN_EID_SSID;
1660         *pos++ = 0;
1661
1662         /* fill in our direct SSID IE... */
1663         if (is_direct) {
1664                 /* ...next IE... */
1665                 left -= 2 + priv->essid_len;
1666                 if (left < 0)
1667                         return 0;
1668                 /* ... fill it in... */
1669                 *pos++ = WLAN_EID_SSID;
1670                 *pos++ = priv->essid_len;
1671                 memcpy(pos, priv->essid, priv->essid_len);
1672                 pos += priv->essid_len;
1673                 len += 2 + priv->essid_len;
1674         }
1675
1676         /* fill in supported rate */
1677         /* ...next IE... */
1678         left -= 2;
1679         if (left < 0)
1680                 return 0;
1681
1682         /* ... fill it in... */
1683         *pos++ = WLAN_EID_SUPP_RATES;
1684         *pos = 0;
1685
1686         priv->active_rate = priv->rates_mask;
1687         active_rates = priv->active_rate;
1688         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1689
1690         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1691         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1692                         priv->active_rate_basic, &left);
1693         active_rates &= ~ret_rates;
1694
1695         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1696                                  priv->active_rate_basic, &left);
1697         active_rates &= ~ret_rates;
1698
1699         len += 2 + *pos;
1700         pos += (*pos) + 1;
1701         if (active_rates == 0)
1702                 goto fill_end;
1703
1704         /* fill in supported extended rate */
1705         /* ...next IE... */
1706         left -= 2;
1707         if (left < 0)
1708                 return 0;
1709         /* ... fill it in... */
1710         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1711         *pos = 0;
1712         iwl3945_supported_rate_to_ie(pos, active_rates,
1713                                  priv->active_rate_basic, &left);
1714         if (*pos > 0)
1715                 len += 2 + *pos;
1716
1717  fill_end:
1718         return (u16)len;
1719 }
1720
1721 /*
1722  * QoS  support
1723 */
1724 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1725                                        struct iwl3945_qosparam_cmd *qos)
1726 {
1727
1728         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1729                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1730 }
1731
1732 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1733 {
1734         u16 cw_min = 15;
1735         u16 cw_max = 1023;
1736         u8 aifs = 2;
1737         u8 is_legacy = 0;
1738         unsigned long flags;
1739         int i;
1740
1741         spin_lock_irqsave(&priv->lock, flags);
1742         priv->qos_data.qos_active = 0;
1743
1744         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1745                 if (priv->qos_data.qos_enable)
1746                         priv->qos_data.qos_active = 1;
1747                 if (!(priv->active_rate & 0xfff0)) {
1748                         cw_min = 31;
1749                         is_legacy = 1;
1750                 }
1751         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1752                 if (priv->qos_data.qos_enable)
1753                         priv->qos_data.qos_active = 1;
1754         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1755                 cw_min = 31;
1756                 is_legacy = 1;
1757         }
1758
1759         if (priv->qos_data.qos_active)
1760                 aifs = 3;
1761
1762         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1763         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1764         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1765         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1766         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1767
1768         if (priv->qos_data.qos_active) {
1769                 i = 1;
1770                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1771                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1772                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1773                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1774                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1775
1776                 i = 2;
1777                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1778                         cpu_to_le16((cw_min + 1) / 2 - 1);
1779                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1780                         cpu_to_le16(cw_max);
1781                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1782                 if (is_legacy)
1783                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1784                                 cpu_to_le16(6016);
1785                 else
1786                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1787                                 cpu_to_le16(3008);
1788                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1789
1790                 i = 3;
1791                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1792                         cpu_to_le16((cw_min + 1) / 4 - 1);
1793                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1794                         cpu_to_le16((cw_max + 1) / 2 - 1);
1795                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1796                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1797                 if (is_legacy)
1798                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1799                                 cpu_to_le16(3264);
1800                 else
1801                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1802                                 cpu_to_le16(1504);
1803         } else {
1804                 for (i = 1; i < 4; i++) {
1805                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1806                                 cpu_to_le16(cw_min);
1807                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1808                                 cpu_to_le16(cw_max);
1809                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1810                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1811                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1812                 }
1813         }
1814         IWL_DEBUG_QOS("set QoS to default \n");
1815
1816         spin_unlock_irqrestore(&priv->lock, flags);
1817 }
1818
1819 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
1820 {
1821         unsigned long flags;
1822
1823         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1824                 return;
1825
1826         if (!priv->qos_data.qos_enable)
1827                 return;
1828
1829         spin_lock_irqsave(&priv->lock, flags);
1830         priv->qos_data.def_qos_parm.qos_flags = 0;
1831
1832         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1833             !priv->qos_data.qos_cap.q_AP.txop_request)
1834                 priv->qos_data.def_qos_parm.qos_flags |=
1835                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1836
1837         if (priv->qos_data.qos_active)
1838                 priv->qos_data.def_qos_parm.qos_flags |=
1839                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1840
1841         spin_unlock_irqrestore(&priv->lock, flags);
1842
1843         if (force || iwl3945_is_associated(priv)) {
1844                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1845                               priv->qos_data.qos_active);
1846
1847                 iwl3945_send_qos_params_command(priv,
1848                                 &(priv->qos_data.def_qos_parm));
1849         }
1850 }
1851
1852 /*
1853  * Power management (not Tx power!) functions
1854  */
1855 #define MSEC_TO_USEC 1024
1856
1857 #define NOSLP __constant_cpu_to_le32(0)
1858 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
1859 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1860 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1861                                      __constant_cpu_to_le32(X1), \
1862                                      __constant_cpu_to_le32(X2), \
1863                                      __constant_cpu_to_le32(X3), \
1864                                      __constant_cpu_to_le32(X4)}
1865
1866
1867 /* default power management (not Tx power) table values */
1868 /* for tim  0-10 */
1869 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
1870         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1871         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1872         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1873         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1874         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1875         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1876 };
1877
1878 /* for tim > 10 */
1879 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
1880         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1881         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1882                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1883         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1884                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1885         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1886                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1887         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1888         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1889                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1890 };
1891
1892 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
1893 {
1894         int rc = 0, i;
1895         struct iwl3945_power_mgr *pow_data;
1896         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
1897         u16 pci_pm;
1898
1899         IWL_DEBUG_POWER("Initialize power \n");
1900
1901         pow_data = &(priv->power_data);
1902
1903         memset(pow_data, 0, sizeof(*pow_data));
1904
1905         pow_data->active_index = IWL_POWER_RANGE_0;
1906         pow_data->dtim_val = 0xffff;
1907
1908         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1909         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1910
1911         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1912         if (rc != 0)
1913                 return 0;
1914         else {
1915                 struct iwl3945_powertable_cmd *cmd;
1916
1917                 IWL_DEBUG_POWER("adjust power command flags\n");
1918
1919                 for (i = 0; i < IWL_POWER_AC; i++) {
1920                         cmd = &pow_data->pwr_range_0[i].cmd;
1921
1922                         if (pci_pm & 0x1)
1923                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1924                         else
1925                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1926                 }
1927         }
1928         return rc;
1929 }
1930
1931 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
1932                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
1933 {
1934         int rc = 0, i;
1935         u8 skip;
1936         u32 max_sleep = 0;
1937         struct iwl3945_power_vec_entry *range;
1938         u8 period = 0;
1939         struct iwl3945_power_mgr *pow_data;
1940
1941         if (mode > IWL_POWER_INDEX_5) {
1942                 IWL_DEBUG_POWER("Error invalid power mode \n");
1943                 return -1;
1944         }
1945         pow_data = &(priv->power_data);
1946
1947         if (pow_data->active_index == IWL_POWER_RANGE_0)
1948                 range = &pow_data->pwr_range_0[0];
1949         else
1950                 range = &pow_data->pwr_range_1[1];
1951
1952         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1953
1954 #ifdef IWL_MAC80211_DISABLE
1955         if (priv->assoc_network != NULL) {
1956                 unsigned long flags;
1957
1958                 period = priv->assoc_network->tim.tim_period;
1959         }
1960 #endif  /*IWL_MAC80211_DISABLE */
1961         skip = range[mode].no_dtim;
1962
1963         if (period == 0) {
1964                 period = 1;
1965                 skip = 0;
1966         }
1967
1968         if (skip == 0) {
1969                 max_sleep = period;
1970                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1971         } else {
1972                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1973                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1974                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1975         }
1976
1977         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1978                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1979                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1980         }
1981
1982         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1983         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1984         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1985         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1986                         le32_to_cpu(cmd->sleep_interval[0]),
1987                         le32_to_cpu(cmd->sleep_interval[1]),
1988                         le32_to_cpu(cmd->sleep_interval[2]),
1989                         le32_to_cpu(cmd->sleep_interval[3]),
1990                         le32_to_cpu(cmd->sleep_interval[4]));
1991
1992         return rc;
1993 }
1994
1995 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
1996 {
1997         u32 uninitialized_var(final_mode);
1998         int rc;
1999         struct iwl3945_powertable_cmd cmd;
2000
2001         /* If on battery, set to 3,
2002          * if plugged into AC power, set to CAM ("continuously aware mode"),
2003          * else user level */
2004         switch (mode) {
2005         case IWL_POWER_BATTERY:
2006                 final_mode = IWL_POWER_INDEX_3;
2007                 break;
2008         case IWL_POWER_AC:
2009                 final_mode = IWL_POWER_MODE_CAM;
2010                 break;
2011         default:
2012                 final_mode = mode;
2013                 break;
2014         }
2015
2016         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2017
2018         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2019
2020         if (final_mode == IWL_POWER_MODE_CAM)
2021                 clear_bit(STATUS_POWER_PMI, &priv->status);
2022         else
2023                 set_bit(STATUS_POWER_PMI, &priv->status);
2024
2025         return rc;
2026 }
2027
2028 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2029 {
2030         /* Filter incoming packets to determine if they are targeted toward
2031          * this network, discarding packets coming from ourselves */
2032         switch (priv->iw_mode) {
2033         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2034                 /* packets from our adapter are dropped (echo) */
2035                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2036                         return 0;
2037                 /* {broad,multi}cast packets to our IBSS go through */
2038                 if (is_multicast_ether_addr(header->addr1))
2039                         return !compare_ether_addr(header->addr3, priv->bssid);
2040                 /* packets to our adapter go through */
2041                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2042         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2043                 /* packets from our adapter are dropped (echo) */
2044                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2045                         return 0;
2046                 /* {broad,multi}cast packets to our BSS go through */
2047                 if (is_multicast_ether_addr(header->addr1))
2048                         return !compare_ether_addr(header->addr2, priv->bssid);
2049                 /* packets to our adapter go through */
2050                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2051         default:
2052                 return 1;
2053         }
2054
2055         return 1;
2056 }
2057
2058 /**
2059  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2060  *
2061  * NOTE: priv->mutex is not required before calling this function
2062  */
2063 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2064 {
2065         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2066                 clear_bit(STATUS_SCANNING, &priv->status);
2067                 return 0;
2068         }
2069
2070         if (test_bit(STATUS_SCANNING, &priv->status)) {
2071                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2072                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2073                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2074                         queue_work(priv->workqueue, &priv->abort_scan);
2075
2076                 } else
2077                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2078
2079                 return test_bit(STATUS_SCANNING, &priv->status);
2080         }
2081
2082         return 0;
2083 }
2084
2085 /**
2086  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2087  * @ms: amount of time to wait (in milliseconds) for scan to abort
2088  *
2089  * NOTE: priv->mutex must be held before calling this function
2090  */
2091 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2092 {
2093         unsigned long now = jiffies;
2094         int ret;
2095
2096         ret = iwl3945_scan_cancel(priv);
2097         if (ret && ms) {
2098                 mutex_unlock(&priv->mutex);
2099                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2100                                 test_bit(STATUS_SCANNING, &priv->status))
2101                         msleep(1);
2102                 mutex_lock(&priv->mutex);
2103
2104                 return test_bit(STATUS_SCANNING, &priv->status);
2105         }
2106
2107         return ret;
2108 }
2109
2110 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2111 {
2112         /* Reset ieee stats */
2113
2114         /* We don't reset the net_device_stats (ieee->stats) on
2115          * re-association */
2116
2117         priv->last_seq_num = -1;
2118         priv->last_frag_num = -1;
2119         priv->last_packet_time = 0;
2120
2121         iwl3945_scan_cancel(priv);
2122 }
2123
2124 #define MAX_UCODE_BEACON_INTERVAL       1024
2125 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2126
2127 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2128 {
2129         u16 new_val = 0;
2130         u16 beacon_factor = 0;
2131
2132         beacon_factor =
2133             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2134                 / MAX_UCODE_BEACON_INTERVAL;
2135         new_val = beacon_val / beacon_factor;
2136
2137         return cpu_to_le16(new_val);
2138 }
2139
2140 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2141 {
2142         u64 interval_tm_unit;
2143         u64 tsf, result;
2144         unsigned long flags;
2145         struct ieee80211_conf *conf = NULL;
2146         u16 beacon_int = 0;
2147
2148         conf = ieee80211_get_hw_conf(priv->hw);
2149
2150         spin_lock_irqsave(&priv->lock, flags);
2151         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2152         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2153
2154         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2155
2156         tsf = priv->timestamp1;
2157         tsf = ((tsf << 32) | priv->timestamp0);
2158
2159         beacon_int = priv->beacon_int;
2160         spin_unlock_irqrestore(&priv->lock, flags);
2161
2162         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2163                 if (beacon_int == 0) {
2164                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2165                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2166                 } else {
2167                         priv->rxon_timing.beacon_interval =
2168                                 cpu_to_le16(beacon_int);
2169                         priv->rxon_timing.beacon_interval =
2170                             iwl3945_adjust_beacon_interval(
2171                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2172                 }
2173
2174                 priv->rxon_timing.atim_window = 0;
2175         } else {
2176                 priv->rxon_timing.beacon_interval =
2177                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2178                 /* TODO: we need to get atim_window from upper stack
2179                  * for now we set to 0 */
2180                 priv->rxon_timing.atim_window = 0;
2181         }
2182
2183         interval_tm_unit =
2184                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2185         result = do_div(tsf, interval_tm_unit);
2186         priv->rxon_timing.beacon_init_val =
2187             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2188
2189         IWL_DEBUG_ASSOC
2190             ("beacon interval %d beacon timer %d beacon tim %d\n",
2191                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2192                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2193                 le16_to_cpu(priv->rxon_timing.atim_window));
2194 }
2195
2196 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2197 {
2198         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2199                 IWL_ERROR("APs don't scan.\n");
2200                 return 0;
2201         }
2202
2203         if (!iwl3945_is_ready_rf(priv)) {
2204                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2205                 return -EIO;
2206         }
2207
2208         if (test_bit(STATUS_SCANNING, &priv->status)) {
2209                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2210                 return -EAGAIN;
2211         }
2212
2213         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2214                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2215                                "Queuing.\n");
2216                 return -EAGAIN;
2217         }
2218
2219         IWL_DEBUG_INFO("Starting scan...\n");
2220         priv->scan_bands = 2;
2221         set_bit(STATUS_SCANNING, &priv->status);
2222         priv->scan_start = jiffies;
2223         priv->scan_pass_start = priv->scan_start;
2224
2225         queue_work(priv->workqueue, &priv->request_scan);
2226
2227         return 0;
2228 }
2229
2230 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2231 {
2232         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2233
2234         if (hw_decrypt)
2235                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2236         else
2237                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2238
2239         return 0;
2240 }
2241
2242 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2243                                           enum ieee80211_band band)
2244 {
2245         if (band == IEEE80211_BAND_5GHZ) {
2246                 priv->staging_rxon.flags &=
2247                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2248                       | RXON_FLG_CCK_MSK);
2249                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2250         } else {
2251                 /* Copied from iwl3945_bg_post_associate() */
2252                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2253                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2254                 else
2255                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2256
2257                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2258                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2259
2260                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2261                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2262                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2263         }
2264 }
2265
2266 /*
2267  * initialize rxon structure with default values from eeprom
2268  */
2269 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2270 {
2271         const struct iwl3945_channel_info *ch_info;
2272
2273         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2274
2275         switch (priv->iw_mode) {
2276         case IEEE80211_IF_TYPE_AP:
2277                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2278                 break;
2279
2280         case IEEE80211_IF_TYPE_STA:
2281                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2282                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2283                 break;
2284
2285         case IEEE80211_IF_TYPE_IBSS:
2286                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2287                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2288                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2289                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2290                 break;
2291
2292         case IEEE80211_IF_TYPE_MNTR:
2293                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2294                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2295                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2296                 break;
2297         default:
2298                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
2299                 break;
2300         }
2301
2302 #if 0
2303         /* TODO:  Figure out when short_preamble would be set and cache from
2304          * that */
2305         if (!hw_to_local(priv->hw)->short_preamble)
2306                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2307         else
2308                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2309 #endif
2310
2311         ch_info = iwl3945_get_channel_info(priv, priv->band,
2312                                        le16_to_cpu(priv->staging_rxon.channel));
2313
2314         if (!ch_info)
2315                 ch_info = &priv->channel_info[0];
2316
2317         /*
2318          * in some case A channels are all non IBSS
2319          * in this case force B/G channel
2320          */
2321         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2322             !(is_channel_ibss(ch_info)))
2323                 ch_info = &priv->channel_info[0];
2324
2325         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2326         if (is_channel_a_band(ch_info))
2327                 priv->band = IEEE80211_BAND_5GHZ;
2328         else
2329                 priv->band = IEEE80211_BAND_2GHZ;
2330
2331         iwl3945_set_flags_for_phymode(priv, priv->band);
2332
2333         priv->staging_rxon.ofdm_basic_rates =
2334             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2335         priv->staging_rxon.cck_basic_rates =
2336             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2337 }
2338
2339 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2340 {
2341         if (mode == IEEE80211_IF_TYPE_IBSS) {
2342                 const struct iwl3945_channel_info *ch_info;
2343
2344                 ch_info = iwl3945_get_channel_info(priv,
2345                         priv->band,
2346                         le16_to_cpu(priv->staging_rxon.channel));
2347
2348                 if (!ch_info || !is_channel_ibss(ch_info)) {
2349                         IWL_ERROR("channel %d not IBSS channel\n",
2350                                   le16_to_cpu(priv->staging_rxon.channel));
2351                         return -EINVAL;
2352                 }
2353         }
2354
2355         priv->iw_mode = mode;
2356
2357         iwl3945_connection_init_rx_config(priv);
2358         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2359
2360         iwl3945_clear_stations_table(priv);
2361
2362         /* dont commit rxon if rf-kill is on*/
2363         if (!iwl3945_is_ready_rf(priv))
2364                 return -EAGAIN;
2365
2366         cancel_delayed_work(&priv->scan_check);
2367         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2368                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2369                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2370                 return -EAGAIN;
2371         }
2372
2373         iwl3945_commit_rxon(priv);
2374
2375         return 0;
2376 }
2377
2378 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2379                                       struct ieee80211_tx_control *ctl,
2380                                       struct iwl3945_cmd *cmd,
2381                                       struct sk_buff *skb_frag,
2382                                       int last_frag)
2383 {
2384         struct iwl3945_hw_key *keyinfo =
2385             &priv->stations[ctl->hw_key->hw_key_idx].keyinfo;
2386
2387         switch (keyinfo->alg) {
2388         case ALG_CCMP:
2389                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2390                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2391                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2392                 break;
2393
2394         case ALG_TKIP:
2395 #if 0
2396                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2397
2398                 if (last_frag)
2399                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2400                                8);
2401                 else
2402                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2403 #endif
2404                 break;
2405
2406         case ALG_WEP:
2407                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2408                     (ctl->hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2409
2410                 if (keyinfo->keylen == 13)
2411                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2412
2413                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2414
2415                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2416                              "with key %d\n", ctl->hw_key->hw_key_idx);
2417                 break;
2418
2419         default:
2420                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2421                 break;
2422         }
2423 }
2424
2425 /*
2426  * handle build REPLY_TX command notification.
2427  */
2428 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2429                                   struct iwl3945_cmd *cmd,
2430                                   struct ieee80211_tx_control *ctrl,
2431                                   struct ieee80211_hdr *hdr,
2432                                   int is_unicast, u8 std_id)
2433 {
2434         u16 fc = le16_to_cpu(hdr->frame_control);
2435         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2436
2437         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2438         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2439                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2440                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2441                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2442                 if (ieee80211_is_probe_response(fc) &&
2443                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2444                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2445         } else {
2446                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2447                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2448         }
2449
2450         cmd->cmd.tx.sta_id = std_id;
2451         if (ieee80211_get_morefrag(hdr))
2452                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2453
2454         if (ieee80211_is_qos_data(fc)) {
2455                 u8 *qc = ieee80211_get_qos_ctrl(hdr, ieee80211_get_hdrlen(fc));
2456                 cmd->cmd.tx.tid_tspec = qc[0] & 0xf;
2457                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2458         } else {
2459                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2460         }
2461
2462         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2463                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2464                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2465         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2466                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2467                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2468         }
2469
2470         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2471                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2472
2473         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2474         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2475                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2476                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2477                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2478                 else
2479                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2480         } else {
2481                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2482 #ifdef CONFIG_IWL3945_LEDS
2483                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2484 #endif
2485         }
2486
2487         cmd->cmd.tx.driver_txop = 0;
2488         cmd->cmd.tx.tx_flags = tx_flags;
2489         cmd->cmd.tx.next_frame_len = 0;
2490 }
2491
2492 /**
2493  * iwl3945_get_sta_id - Find station's index within station table
2494  */
2495 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2496 {
2497         int sta_id;
2498         u16 fc = le16_to_cpu(hdr->frame_control);
2499
2500         /* If this frame is broadcast or management, use broadcast station id */
2501         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2502             is_multicast_ether_addr(hdr->addr1))
2503                 return priv->hw_setting.bcast_sta_id;
2504
2505         switch (priv->iw_mode) {
2506
2507         /* If we are a client station in a BSS network, use the special
2508          * AP station entry (that's the only station we communicate with) */
2509         case IEEE80211_IF_TYPE_STA:
2510                 return IWL_AP_ID;
2511
2512         /* If we are an AP, then find the station, or use BCAST */
2513         case IEEE80211_IF_TYPE_AP:
2514                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2515                 if (sta_id != IWL_INVALID_STATION)
2516                         return sta_id;
2517                 return priv->hw_setting.bcast_sta_id;
2518
2519         /* If this frame is going out to an IBSS network, find the station,
2520          * or create a new station table entry */
2521         case IEEE80211_IF_TYPE_IBSS: {
2522                 DECLARE_MAC_BUF(mac);
2523
2524                 /* Create new station table entry */
2525                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2526                 if (sta_id != IWL_INVALID_STATION)
2527                         return sta_id;
2528
2529                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2530
2531                 if (sta_id != IWL_INVALID_STATION)
2532                         return sta_id;
2533
2534                 IWL_DEBUG_DROP("Station %s not in station map. "
2535                                "Defaulting to broadcast...\n",
2536                                print_mac(mac, hdr->addr1));
2537                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2538                 return priv->hw_setting.bcast_sta_id;
2539         }
2540         default:
2541                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2542                 return priv->hw_setting.bcast_sta_id;
2543         }
2544 }
2545
2546 /*
2547  * start REPLY_TX command process
2548  */
2549 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2550                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2551 {
2552         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2553         struct iwl3945_tfd_frame *tfd;
2554         u32 *control_flags;
2555         int txq_id = ctl->queue;
2556         struct iwl3945_tx_queue *txq = NULL;
2557         struct iwl3945_queue *q = NULL;
2558         dma_addr_t phys_addr;
2559         dma_addr_t txcmd_phys;
2560         struct iwl3945_cmd *out_cmd = NULL;
2561         u16 len, idx, len_org, hdr_len;
2562         u8 id;
2563         u8 unicast;
2564         u8 sta_id;
2565         u8 tid = 0;
2566         u16 seq_number = 0;
2567         u16 fc;
2568         u8 wait_write_ptr = 0;
2569         u8 *qc = NULL;
2570         unsigned long flags;
2571         int rc;
2572
2573         spin_lock_irqsave(&priv->lock, flags);
2574         if (iwl3945_is_rfkill(priv)) {
2575                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2576                 goto drop_unlock;
2577         }
2578
2579         if (!priv->vif) {
2580                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2581                 goto drop_unlock;
2582         }
2583
2584         if ((ieee80211_get_tx_rate(priv->hw, ctl)->hw_value & 0xFF) == IWL_INVALID_RATE) {
2585                 IWL_ERROR("ERROR: No TX rate available.\n");
2586                 goto drop_unlock;
2587         }
2588
2589         unicast = !is_multicast_ether_addr(hdr->addr1);
2590         id = 0;
2591
2592         fc = le16_to_cpu(hdr->frame_control);
2593
2594 #ifdef CONFIG_IWL3945_DEBUG
2595         if (ieee80211_is_auth(fc))
2596                 IWL_DEBUG_TX("Sending AUTH frame\n");
2597         else if (ieee80211_is_assoc_request(fc))
2598                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2599         else if (ieee80211_is_reassoc_request(fc))
2600                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2601 #endif
2602
2603         /* drop all data frame if we are not associated */
2604         if ((!iwl3945_is_associated(priv) ||
2605              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id)) &&
2606             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2607                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2608                 goto drop_unlock;
2609         }
2610
2611         spin_unlock_irqrestore(&priv->lock, flags);
2612
2613         hdr_len = ieee80211_get_hdrlen(fc);
2614
2615         /* Find (or create) index into station table for destination station */
2616         sta_id = iwl3945_get_sta_id(priv, hdr);
2617         if (sta_id == IWL_INVALID_STATION) {
2618                 DECLARE_MAC_BUF(mac);
2619
2620                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2621                                print_mac(mac, hdr->addr1));
2622                 goto drop;
2623         }
2624
2625         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2626
2627         if (ieee80211_is_qos_data(fc)) {
2628                 qc = ieee80211_get_qos_ctrl(hdr, hdr_len);
2629                 tid = qc[0] & 0xf;
2630                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2631                                 IEEE80211_SCTL_SEQ;
2632                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2633                         (hdr->seq_ctrl &
2634                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2635                 seq_number += 0x10;
2636         }
2637
2638         /* Descriptor for chosen Tx queue */
2639         txq = &priv->txq[txq_id];
2640         q = &txq->q;
2641
2642         spin_lock_irqsave(&priv->lock, flags);
2643
2644         /* Set up first empty TFD within this queue's circular TFD buffer */
2645         tfd = &txq->bd[q->write_ptr];
2646         memset(tfd, 0, sizeof(*tfd));
2647         control_flags = (u32 *) tfd;
2648         idx = get_cmd_index(q, q->write_ptr, 0);
2649
2650         /* Set up driver data for this TFD */
2651         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2652         txq->txb[q->write_ptr].skb[0] = skb;
2653         memcpy(&(txq->txb[q->write_ptr].status.control),
2654                ctl, sizeof(struct ieee80211_tx_control));
2655
2656         /* Init first empty entry in queue's array of Tx/cmd buffers */
2657         out_cmd = &txq->cmd[idx];
2658         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2659         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2660
2661         /*
2662          * Set up the Tx-command (not MAC!) header.
2663          * Store the chosen Tx queue and TFD index within the sequence field;
2664          * after Tx, uCode's Tx response will return this value so driver can
2665          * locate the frame within the tx queue and do post-tx processing.
2666          */
2667         out_cmd->hdr.cmd = REPLY_TX;
2668         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2669                                 INDEX_TO_SEQ(q->write_ptr)));
2670
2671         /* Copy MAC header from skb into command buffer */
2672         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2673
2674         /*
2675          * Use the first empty entry in this queue's command buffer array
2676          * to contain the Tx command and MAC header concatenated together
2677          * (payload data will be in another buffer).
2678          * Size of this varies, due to varying MAC header length.
2679          * If end is not dword aligned, we'll have 2 extra bytes at the end
2680          * of the MAC header (device reads on dword boundaries).
2681          * We'll tell device about this padding later.
2682          */
2683         len = priv->hw_setting.tx_cmd_len +
2684                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2685
2686         len_org = len;
2687         len = (len + 3) & ~3;
2688
2689         if (len_org != len)
2690                 len_org = 1;
2691         else
2692                 len_org = 0;
2693
2694         /* Physical address of this Tx command's header (not MAC header!),
2695          * within command buffer array. */
2696         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2697                      offsetof(struct iwl3945_cmd, hdr);
2698
2699         /* Add buffer containing Tx command and MAC(!) header to TFD's
2700          * first entry */
2701         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2702
2703         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2704                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2705
2706         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2707          * if any (802.11 null frames have no payload). */
2708         len = skb->len - hdr_len;
2709         if (len) {
2710                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2711                                            len, PCI_DMA_TODEVICE);
2712                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2713         }
2714
2715         if (!len)
2716                 /* If there is no payload, then we use only one Tx buffer */
2717                 *control_flags = TFD_CTL_COUNT_SET(1);
2718         else
2719                 /* Else use 2 buffers.
2720                  * Tell 3945 about any padding after MAC header */
2721                 *control_flags = TFD_CTL_COUNT_SET(2) |
2722                         TFD_CTL_PAD_SET(U32_PAD(len));
2723
2724         /* Total # bytes to be transmitted */
2725         len = (u16)skb->len;
2726         out_cmd->cmd.tx.len = cpu_to_le16(len);
2727
2728         /* TODO need this for burst mode later on */
2729         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2730
2731         /* set is_hcca to 0; it probably will never be implemented */
2732         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2733
2734         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2735         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2736
2737         if (!ieee80211_get_morefrag(hdr)) {
2738                 txq->need_update = 1;
2739                 if (qc) {
2740                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2741                 }
2742         } else {
2743                 wait_write_ptr = 1;
2744                 txq->need_update = 0;
2745         }
2746
2747         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2748                            sizeof(out_cmd->cmd.tx));
2749
2750         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2751                            ieee80211_get_hdrlen(fc));
2752
2753         /* Tell device the write index *just past* this latest filled TFD */
2754         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2755         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2756         spin_unlock_irqrestore(&priv->lock, flags);
2757
2758         if (rc)
2759                 return rc;
2760
2761         if ((iwl3945_queue_space(q) < q->high_mark)
2762             && priv->mac80211_registered) {
2763                 if (wait_write_ptr) {
2764                         spin_lock_irqsave(&priv->lock, flags);
2765                         txq->need_update = 1;
2766                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2767                         spin_unlock_irqrestore(&priv->lock, flags);
2768                 }
2769
2770                 ieee80211_stop_queue(priv->hw, ctl->queue);
2771         }
2772
2773         return 0;
2774
2775 drop_unlock:
2776         spin_unlock_irqrestore(&priv->lock, flags);
2777 drop:
2778         return -1;
2779 }
2780
2781 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2782 {
2783         const struct ieee80211_supported_band *sband = NULL;
2784         struct ieee80211_rate *rate;
2785         int i;
2786
2787         sband = iwl3945_get_band(priv, priv->band);
2788         if (!sband) {
2789                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2790                 return;
2791         }
2792
2793         priv->active_rate = 0;
2794         priv->active_rate_basic = 0;
2795
2796         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2797                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2798
2799         for (i = 0; i < sband->n_bitrates; i++) {
2800                 rate = &sband->bitrates[i];
2801                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2802                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2803                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2804                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2805                         priv->active_rate |= (1 << rate->hw_value);
2806                 }
2807         }
2808
2809         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2810                        priv->active_rate, priv->active_rate_basic);
2811
2812         /*
2813          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2814          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2815          * OFDM
2816          */
2817         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2818                 priv->staging_rxon.cck_basic_rates =
2819                     ((priv->active_rate_basic &
2820                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2821         else
2822                 priv->staging_rxon.cck_basic_rates =
2823                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2824
2825         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2826                 priv->staging_rxon.ofdm_basic_rates =
2827                     ((priv->active_rate_basic &
2828                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2829                       IWL_FIRST_OFDM_RATE) & 0xFF;
2830         else
2831                 priv->staging_rxon.ofdm_basic_rates =
2832                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2833 }
2834
2835 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2836 {
2837         unsigned long flags;
2838
2839         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2840                 return;
2841
2842         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2843                           disable_radio ? "OFF" : "ON");
2844
2845         if (disable_radio) {
2846                 iwl3945_scan_cancel(priv);
2847                 /* FIXME: This is a workaround for AP */
2848                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2849                         spin_lock_irqsave(&priv->lock, flags);
2850                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2851                                     CSR_UCODE_SW_BIT_RFKILL);
2852                         spin_unlock_irqrestore(&priv->lock, flags);
2853                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2854                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2855                 }
2856                 return;
2857         }
2858
2859         spin_lock_irqsave(&priv->lock, flags);
2860         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2861
2862         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2863         spin_unlock_irqrestore(&priv->lock, flags);
2864
2865         /* wake up ucode */
2866         msleep(10);
2867
2868         spin_lock_irqsave(&priv->lock, flags);
2869         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2870         if (!iwl3945_grab_nic_access(priv))
2871                 iwl3945_release_nic_access(priv);
2872         spin_unlock_irqrestore(&priv->lock, flags);
2873
2874         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2875                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2876                                   "disabled by HW switch\n");
2877                 return;
2878         }
2879
2880         queue_work(priv->workqueue, &priv->restart);
2881         return;
2882 }
2883
2884 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2885                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2886 {
2887         u16 fc =
2888             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2889
2890         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2891                 return;
2892
2893         if (!(fc & IEEE80211_FCTL_PROTECTED))
2894                 return;
2895
2896         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2897         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2898         case RX_RES_STATUS_SEC_TYPE_TKIP:
2899                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2900                     RX_RES_STATUS_BAD_ICV_MIC)
2901                         stats->flag |= RX_FLAG_MMIC_ERROR;
2902         case RX_RES_STATUS_SEC_TYPE_WEP:
2903         case RX_RES_STATUS_SEC_TYPE_CCMP:
2904                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2905                     RX_RES_STATUS_DECRYPT_OK) {
2906                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2907                         stats->flag |= RX_FLAG_DECRYPTED;
2908                 }
2909                 break;
2910
2911         default:
2912                 break;
2913         }
2914 }
2915
2916 #define IWL_PACKET_RETRY_TIME HZ
2917
2918 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2919 {
2920         u16 sc = le16_to_cpu(header->seq_ctrl);
2921         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2922         u16 frag = sc & IEEE80211_SCTL_FRAG;
2923         u16 *last_seq, *last_frag;
2924         unsigned long *last_time;
2925
2926         switch (priv->iw_mode) {
2927         case IEEE80211_IF_TYPE_IBSS:{
2928                 struct list_head *p;
2929                 struct iwl3945_ibss_seq *entry = NULL;
2930                 u8 *mac = header->addr2;
2931                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2932
2933                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2934                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
2935                         if (!compare_ether_addr(entry->mac, mac))
2936                                 break;
2937                 }
2938                 if (p == &priv->ibss_mac_hash[index]) {
2939                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2940                         if (!entry) {
2941                                 IWL_ERROR("Cannot malloc new mac entry\n");
2942                                 return 0;
2943                         }
2944                         memcpy(entry->mac, mac, ETH_ALEN);
2945                         entry->seq_num = seq;
2946                         entry->frag_num = frag;
2947                         entry->packet_time = jiffies;
2948                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2949                         return 0;
2950                 }
2951                 last_seq = &entry->seq_num;
2952                 last_frag = &entry->frag_num;
2953                 last_time = &entry->packet_time;
2954                 break;
2955         }
2956         case IEEE80211_IF_TYPE_STA:
2957                 last_seq = &priv->last_seq_num;
2958                 last_frag = &priv->last_frag_num;
2959                 last_time = &priv->last_packet_time;
2960                 break;
2961         default:
2962                 return 0;
2963         }
2964         if ((*last_seq == seq) &&
2965             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2966                 if (*last_frag == frag)
2967                         goto drop;
2968                 if (*last_frag + 1 != frag)
2969                         /* out-of-order fragment */
2970                         goto drop;
2971         } else
2972                 *last_seq = seq;
2973
2974         *last_frag = frag;
2975         *last_time = jiffies;
2976         return 0;
2977
2978  drop:
2979         return 1;
2980 }
2981
2982 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2983
2984 #include "iwl-spectrum.h"
2985
2986 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2987 #define BEACON_TIME_MASK_HIGH   0xFF000000
2988 #define TIME_UNIT               1024
2989
2990 /*
2991  * extended beacon time format
2992  * time in usec will be changed into a 32-bit value in 8:24 format
2993  * the high 1 byte is the beacon counts
2994  * the lower 3 bytes is the time in usec within one beacon interval
2995  */
2996
2997 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2998 {
2999         u32 quot;
3000         u32 rem;
3001         u32 interval = beacon_interval * 1024;
3002
3003         if (!interval || !usec)
3004                 return 0;
3005
3006         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3007         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3008
3009         return (quot << 24) + rem;
3010 }
3011
3012 /* base is usually what we get from ucode with each received frame,
3013  * the same as HW timer counter counting down
3014  */
3015
3016 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3017 {
3018         u32 base_low = base & BEACON_TIME_MASK_LOW;
3019         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3020         u32 interval = beacon_interval * TIME_UNIT;
3021         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3022             (addon & BEACON_TIME_MASK_HIGH);
3023
3024         if (base_low > addon_low)
3025                 res += base_low - addon_low;
3026         else if (base_low < addon_low) {
3027                 res += interval + base_low - addon_low;
3028                 res += (1 << 24);
3029         } else
3030                 res += (1 << 24);
3031
3032         return cpu_to_le32(res);
3033 }
3034
3035 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3036                                struct ieee80211_measurement_params *params,
3037                                u8 type)
3038 {
3039         struct iwl3945_spectrum_cmd spectrum;
3040         struct iwl3945_rx_packet *res;
3041         struct iwl3945_host_cmd cmd = {
3042                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3043                 .data = (void *)&spectrum,
3044                 .meta.flags = CMD_WANT_SKB,
3045         };
3046         u32 add_time = le64_to_cpu(params->start_time);
3047         int rc;
3048         int spectrum_resp_status;
3049         int duration = le16_to_cpu(params->duration);
3050
3051         if (iwl3945_is_associated(priv))
3052                 add_time =
3053                     iwl3945_usecs_to_beacons(
3054                         le64_to_cpu(params->start_time) - priv->last_tsf,
3055                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3056
3057         memset(&spectrum, 0, sizeof(spectrum));
3058
3059         spectrum.channel_count = cpu_to_le16(1);
3060         spectrum.flags =
3061             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3062         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3063         cmd.len = sizeof(spectrum);
3064         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3065
3066         if (iwl3945_is_associated(priv))
3067                 spectrum.start_time =
3068                     iwl3945_add_beacon_time(priv->last_beacon_time,
3069                                 add_time,
3070                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3071         else
3072                 spectrum.start_time = 0;
3073
3074         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3075         spectrum.channels[0].channel = params->channel;
3076         spectrum.channels[0].type = type;
3077         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3078                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3079                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3080
3081         rc = iwl3945_send_cmd_sync(priv, &cmd);
3082         if (rc)
3083                 return rc;
3084
3085         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3086         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3087                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3088                 rc = -EIO;
3089         }
3090
3091         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3092         switch (spectrum_resp_status) {
3093         case 0:         /* Command will be handled */
3094                 if (res->u.spectrum.id != 0xff) {
3095                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3096                                                 res->u.spectrum.id);
3097                         priv->measurement_status &= ~MEASUREMENT_READY;
3098                 }
3099                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3100                 rc = 0;
3101                 break;
3102
3103         case 1:         /* Command will not be handled */
3104                 rc = -EAGAIN;
3105                 break;
3106         }
3107
3108         dev_kfree_skb_any(cmd.meta.u.skb);
3109
3110         return rc;
3111 }
3112 #endif
3113
3114 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3115                                struct iwl3945_rx_mem_buffer *rxb)
3116 {
3117         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3118         struct iwl3945_alive_resp *palive;
3119         struct delayed_work *pwork;
3120
3121         palive = &pkt->u.alive_frame;
3122
3123         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3124                        "0x%01X 0x%01X\n",
3125                        palive->is_valid, palive->ver_type,
3126                        palive->ver_subtype);
3127
3128         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3129                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3130                 memcpy(&priv->card_alive_init,
3131                        &pkt->u.alive_frame,
3132                        sizeof(struct iwl3945_init_alive_resp));
3133                 pwork = &priv->init_alive_start;
3134         } else {
3135                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3136                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3137                        sizeof(struct iwl3945_alive_resp));
3138                 pwork = &priv->alive_start;
3139                 iwl3945_disable_events(priv);
3140         }
3141
3142         /* We delay the ALIVE response by 5ms to
3143          * give the HW RF Kill time to activate... */
3144         if (palive->is_valid == UCODE_VALID_OK)
3145                 queue_delayed_work(priv->workqueue, pwork,
3146                                    msecs_to_jiffies(5));
3147         else
3148                 IWL_WARNING("uCode did not respond OK.\n");
3149 }
3150
3151 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3152                                  struct iwl3945_rx_mem_buffer *rxb)
3153 {
3154         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3155
3156         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3157         return;
3158 }
3159
3160 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3161                                struct iwl3945_rx_mem_buffer *rxb)
3162 {
3163         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3164
3165         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3166                 "seq 0x%04X ser 0x%08X\n",
3167                 le32_to_cpu(pkt->u.err_resp.error_type),
3168                 get_cmd_string(pkt->u.err_resp.cmd_id),
3169                 pkt->u.err_resp.cmd_id,
3170                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3171                 le32_to_cpu(pkt->u.err_resp.error_info));
3172 }
3173
3174 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3175
3176 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3177 {
3178         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3179         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3180         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3181         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3182                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3183         rxon->channel = csa->channel;
3184         priv->staging_rxon.channel = csa->channel;
3185 }
3186
3187 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3188                                           struct iwl3945_rx_mem_buffer *rxb)
3189 {
3190 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3191         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3192         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3193
3194         if (!report->state) {
3195                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3196                           "Spectrum Measure Notification: Start\n");
3197                 return;
3198         }
3199
3200         memcpy(&priv->measure_report, report, sizeof(*report));
3201         priv->measurement_status |= MEASUREMENT_READY;
3202 #endif
3203 }
3204
3205 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3206                                   struct iwl3945_rx_mem_buffer *rxb)
3207 {
3208 #ifdef CONFIG_IWL3945_DEBUG
3209         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3210         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3211         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3212                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3213 #endif
3214 }
3215
3216 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3217                                              struct iwl3945_rx_mem_buffer *rxb)
3218 {
3219         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3220         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3221                         "notification for %s:\n",
3222                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3223         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3224 }
3225
3226 static void iwl3945_bg_beacon_update(struct work_struct *work)
3227 {
3228         struct iwl3945_priv *priv =
3229                 container_of(work, struct iwl3945_priv, beacon_update);
3230         struct sk_buff *beacon;
3231
3232         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3233         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3234
3235         if (!beacon) {
3236                 IWL_ERROR("update beacon failed\n");
3237                 return;
3238         }
3239
3240         mutex_lock(&priv->mutex);
3241         /* new beacon skb is allocated every time; dispose previous.*/
3242         if (priv->ibss_beacon)
3243                 dev_kfree_skb(priv->ibss_beacon);
3244
3245         priv->ibss_beacon = beacon;
3246         mutex_unlock(&priv->mutex);
3247
3248         iwl3945_send_beacon_cmd(priv);
3249 }
3250
3251 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3252                                 struct iwl3945_rx_mem_buffer *rxb)
3253 {
3254 #ifdef CONFIG_IWL3945_DEBUG
3255         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3256         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3257         u8 rate = beacon->beacon_notify_hdr.rate;
3258
3259         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3260                 "tsf %d %d rate %d\n",
3261                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3262                 beacon->beacon_notify_hdr.failure_frame,
3263                 le32_to_cpu(beacon->ibss_mgr_status),
3264                 le32_to_cpu(beacon->high_tsf),
3265                 le32_to_cpu(beacon->low_tsf), rate);
3266 #endif
3267
3268         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3269             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3270                 queue_work(priv->workqueue, &priv->beacon_update);
3271 }
3272
3273 /* Service response to REPLY_SCAN_CMD (0x80) */
3274 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3275                               struct iwl3945_rx_mem_buffer *rxb)
3276 {
3277 #ifdef CONFIG_IWL3945_DEBUG
3278         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3279         struct iwl3945_scanreq_notification *notif =
3280             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3281
3282         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3283 #endif
3284 }
3285
3286 /* Service SCAN_START_NOTIFICATION (0x82) */
3287 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3288                                     struct iwl3945_rx_mem_buffer *rxb)
3289 {
3290         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3291         struct iwl3945_scanstart_notification *notif =
3292             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3293         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3294         IWL_DEBUG_SCAN("Scan start: "
3295                        "%d [802.11%s] "
3296                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3297                        notif->channel,
3298                        notif->band ? "bg" : "a",
3299                        notif->tsf_high,
3300                        notif->tsf_low, notif->status, notif->beacon_timer);
3301 }
3302
3303 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3304 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3305                                       struct iwl3945_rx_mem_buffer *rxb)
3306 {
3307         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3308         struct iwl3945_scanresults_notification *notif =
3309             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3310
3311         IWL_DEBUG_SCAN("Scan ch.res: "
3312                        "%d [802.11%s] "
3313                        "(TSF: 0x%08X:%08X) - %d "
3314                        "elapsed=%lu usec (%dms since last)\n",
3315                        notif->channel,
3316                        notif->band ? "bg" : "a",
3317                        le32_to_cpu(notif->tsf_high),
3318                        le32_to_cpu(notif->tsf_low),
3319                        le32_to_cpu(notif->statistics[0]),
3320                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3321                        jiffies_to_msecs(elapsed_jiffies
3322                                         (priv->last_scan_jiffies, jiffies)));
3323
3324         priv->last_scan_jiffies = jiffies;
3325         priv->next_scan_jiffies = 0;
3326 }
3327
3328 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3329 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3330                                        struct iwl3945_rx_mem_buffer *rxb)
3331 {
3332         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3333         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3334
3335         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3336                        scan_notif->scanned_channels,
3337                        scan_notif->tsf_low,
3338                        scan_notif->tsf_high, scan_notif->status);
3339
3340         /* The HW is no longer scanning */
3341         clear_bit(STATUS_SCAN_HW, &priv->status);
3342
3343         /* The scan completion notification came in, so kill that timer... */
3344         cancel_delayed_work(&priv->scan_check);
3345
3346         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3347                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3348                        jiffies_to_msecs(elapsed_jiffies
3349                                         (priv->scan_pass_start, jiffies)));
3350
3351         /* Remove this scanned band from the list
3352          * of pending bands to scan */
3353         priv->scan_bands--;
3354
3355         /* If a request to abort was given, or the scan did not succeed
3356          * then we reset the scan state machine and terminate,
3357          * re-queuing another scan if one has been requested */
3358         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3359                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3360                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3361         } else {
3362                 /* If there are more bands on this scan pass reschedule */
3363                 if (priv->scan_bands > 0)
3364                         goto reschedule;
3365         }
3366
3367         priv->last_scan_jiffies = jiffies;
3368         priv->next_scan_jiffies = 0;
3369         IWL_DEBUG_INFO("Setting scan to off\n");
3370
3371         clear_bit(STATUS_SCANNING, &priv->status);
3372
3373         IWL_DEBUG_INFO("Scan took %dms\n",
3374                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3375
3376         queue_work(priv->workqueue, &priv->scan_completed);
3377
3378         return;
3379
3380 reschedule:
3381         priv->scan_pass_start = jiffies;
3382         queue_work(priv->workqueue, &priv->request_scan);
3383 }
3384
3385 /* Handle notification from uCode that card's power state is changing
3386  * due to software, hardware, or critical temperature RFKILL */
3387 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3388                                     struct iwl3945_rx_mem_buffer *rxb)
3389 {
3390         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3391         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3392         unsigned long status = priv->status;
3393
3394         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3395                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3396                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3397
3398         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3399                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3400
3401         if (flags & HW_CARD_DISABLED)
3402                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3403         else
3404                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3405
3406
3407         if (flags & SW_CARD_DISABLED)
3408                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3409         else
3410                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3411
3412         iwl3945_scan_cancel(priv);
3413
3414         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3415              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3416             (test_bit(STATUS_RF_KILL_SW, &status) !=
3417              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3418                 queue_work(priv->workqueue, &priv->rf_kill);
3419         else
3420                 wake_up_interruptible(&priv->wait_command_queue);
3421 }
3422
3423 /**
3424  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3425  *
3426  * Setup the RX handlers for each of the reply types sent from the uCode
3427  * to the host.
3428  *
3429  * This function chains into the hardware specific files for them to setup
3430  * any hardware specific handlers as well.
3431  */
3432 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3433 {
3434         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3435         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3436         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3437         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3438         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3439             iwl3945_rx_spectrum_measure_notif;
3440         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3441         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3442             iwl3945_rx_pm_debug_statistics_notif;
3443         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3444
3445         /*
3446          * The same handler is used for both the REPLY to a discrete
3447          * statistics request from the host as well as for the periodic
3448          * statistics notifications (after received beacons) from the uCode.
3449          */
3450         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3451         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3452
3453         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3454         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3455         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3456             iwl3945_rx_scan_results_notif;
3457         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3458             iwl3945_rx_scan_complete_notif;
3459         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3460
3461         /* Set up hardware specific Rx handlers */
3462         iwl3945_hw_rx_handler_setup(priv);
3463 }
3464
3465 /**
3466  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3467  * When FW advances 'R' index, all entries between old and new 'R' index
3468  * need to be reclaimed.
3469  */
3470 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3471                                       int txq_id, int index)
3472 {
3473         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3474         struct iwl3945_queue *q = &txq->q;
3475         int nfreed = 0;
3476
3477         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3478                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3479                           "is out of range [0-%d] %d %d.\n", txq_id,
3480                           index, q->n_bd, q->write_ptr, q->read_ptr);
3481                 return;
3482         }
3483
3484         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3485                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3486                 if (nfreed > 1) {
3487                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3488                                         q->write_ptr, q->read_ptr);
3489                         queue_work(priv->workqueue, &priv->restart);
3490                         break;
3491                 }
3492                 nfreed++;
3493         }
3494 }
3495
3496
3497 /**
3498  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3499  * @rxb: Rx buffer to reclaim
3500  *
3501  * If an Rx buffer has an async callback associated with it the callback
3502  * will be executed.  The attached skb (if present) will only be freed
3503  * if the callback returns 1
3504  */
3505 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3506                                 struct iwl3945_rx_mem_buffer *rxb)
3507 {
3508         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3509         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3510         int txq_id = SEQ_TO_QUEUE(sequence);
3511         int index = SEQ_TO_INDEX(sequence);
3512         int huge = sequence & SEQ_HUGE_FRAME;
3513         int cmd_index;
3514         struct iwl3945_cmd *cmd;
3515
3516         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3517
3518         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3519         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3520
3521         /* Input error checking is done when commands are added to queue. */
3522         if (cmd->meta.flags & CMD_WANT_SKB) {
3523                 cmd->meta.source->u.skb = rxb->skb;
3524                 rxb->skb = NULL;
3525         } else if (cmd->meta.u.callback &&
3526                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3527                 rxb->skb = NULL;
3528
3529         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3530
3531         if (!(cmd->meta.flags & CMD_ASYNC)) {
3532                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3533                 wake_up_interruptible(&priv->wait_command_queue);
3534         }
3535 }
3536
3537 /************************** RX-FUNCTIONS ****************************/
3538 /*
3539  * Rx theory of operation
3540  *
3541  * The host allocates 32 DMA target addresses and passes the host address
3542  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3543  * 0 to 31
3544  *
3545  * Rx Queue Indexes
3546  * The host/firmware share two index registers for managing the Rx buffers.
3547  *
3548  * The READ index maps to the first position that the firmware may be writing
3549  * to -- the driver can read up to (but not including) this position and get
3550  * good data.
3551  * The READ index is managed by the firmware once the card is enabled.
3552  *
3553  * The WRITE index maps to the last position the driver has read from -- the
3554  * position preceding WRITE is the last slot the firmware can place a packet.
3555  *
3556  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3557  * WRITE = READ.
3558  *
3559  * During initialization, the host sets up the READ queue position to the first
3560  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3561  *
3562  * When the firmware places a packet in a buffer, it will advance the READ index
3563  * and fire the RX interrupt.  The driver can then query the READ index and
3564  * process as many packets as possible, moving the WRITE index forward as it
3565  * resets the Rx queue buffers with new memory.
3566  *
3567  * The management in the driver is as follows:
3568  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3569  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3570  *   to replenish the iwl->rxq->rx_free.
3571  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3572  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3573  *   'processed' and 'read' driver indexes as well)
3574  * + A received packet is processed and handed to the kernel network stack,
3575  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3576  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3577  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3578  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3579  *   were enough free buffers and RX_STALLED is set it is cleared.
3580  *
3581  *
3582  * Driver sequence:
3583  *
3584  * iwl3945_rx_queue_alloc()   Allocates rx_free
3585  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3586  *                            iwl3945_rx_queue_restock
3587  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3588  *                            queue, updates firmware pointers, and updates
3589  *                            the WRITE index.  If insufficient rx_free buffers
3590  *                            are available, schedules iwl3945_rx_replenish
3591  *
3592  * -- enable interrupts --
3593  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3594  *                            READ INDEX, detaching the SKB from the pool.
3595  *                            Moves the packet buffer from queue to rx_used.
3596  *                            Calls iwl3945_rx_queue_restock to refill any empty
3597  *                            slots.
3598  * ...
3599  *
3600  */
3601
3602 /**
3603  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3604  */
3605 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3606 {
3607         int s = q->read - q->write;
3608         if (s <= 0)
3609                 s += RX_QUEUE_SIZE;
3610         /* keep some buffer to not confuse full and empty queue */
3611         s -= 2;
3612         if (s < 0)
3613                 s = 0;
3614         return s;
3615 }
3616
3617 /**
3618  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3619  */
3620 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3621 {
3622         u32 reg = 0;
3623         int rc = 0;
3624         unsigned long flags;
3625
3626         spin_lock_irqsave(&q->lock, flags);
3627
3628         if (q->need_update == 0)
3629                 goto exit_unlock;
3630
3631         /* If power-saving is in use, make sure device is awake */
3632         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3633                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3634
3635                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3636                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3637                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3638                         goto exit_unlock;
3639                 }
3640
3641                 rc = iwl3945_grab_nic_access(priv);
3642                 if (rc)
3643                         goto exit_unlock;
3644
3645                 /* Device expects a multiple of 8 */
3646                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3647                                      q->write & ~0x7);
3648                 iwl3945_release_nic_access(priv);
3649
3650         /* Else device is assumed to be awake */
3651         } else
3652                 /* Device expects a multiple of 8 */
3653                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3654
3655
3656         q->need_update = 0;
3657
3658  exit_unlock:
3659         spin_unlock_irqrestore(&q->lock, flags);
3660         return rc;
3661 }
3662
3663 /**
3664  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3665  */
3666 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3667                                           dma_addr_t dma_addr)
3668 {
3669         return cpu_to_le32((u32)dma_addr);
3670 }
3671
3672 /**
3673  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3674  *
3675  * If there are slots in the RX queue that need to be restocked,
3676  * and we have free pre-allocated buffers, fill the ranks as much
3677  * as we can, pulling from rx_free.
3678  *
3679  * This moves the 'write' index forward to catch up with 'processed', and
3680  * also updates the memory address in the firmware to reference the new
3681  * target buffer.
3682  */
3683 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3684 {
3685         struct iwl3945_rx_queue *rxq = &priv->rxq;
3686         struct list_head *element;
3687         struct iwl3945_rx_mem_buffer *rxb;
3688         unsigned long flags;
3689         int write, rc;
3690
3691         spin_lock_irqsave(&rxq->lock, flags);
3692         write = rxq->write & ~0x7;
3693         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3694                 /* Get next free Rx buffer, remove from free list */
3695                 element = rxq->rx_free.next;
3696                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3697                 list_del(element);
3698
3699                 /* Point to Rx buffer via next RBD in circular buffer */
3700                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3701                 rxq->queue[rxq->write] = rxb;
3702                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3703                 rxq->free_count--;
3704         }
3705         spin_unlock_irqrestore(&rxq->lock, flags);
3706         /* If the pre-allocated buffer pool is dropping low, schedule to
3707          * refill it */
3708         if (rxq->free_count <= RX_LOW_WATERMARK)
3709                 queue_work(priv->workqueue, &priv->rx_replenish);
3710
3711
3712         /* If we've added more space for the firmware to place data, tell it.
3713          * Increment device's write pointer in multiples of 8. */
3714         if ((write != (rxq->write & ~0x7))
3715             || (abs(rxq->write - rxq->read) > 7)) {
3716                 spin_lock_irqsave(&rxq->lock, flags);
3717                 rxq->need_update = 1;
3718                 spin_unlock_irqrestore(&rxq->lock, flags);
3719                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3720                 if (rc)
3721                         return rc;
3722         }
3723
3724         return 0;
3725 }
3726
3727 /**
3728  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3729  *
3730  * When moving to rx_free an SKB is allocated for the slot.
3731  *
3732  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3733  * This is called as a scheduled work item (except for during initialization)
3734  */
3735 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3736 {
3737         struct iwl3945_rx_queue *rxq = &priv->rxq;
3738         struct list_head *element;
3739         struct iwl3945_rx_mem_buffer *rxb;
3740         unsigned long flags;
3741         spin_lock_irqsave(&rxq->lock, flags);
3742         while (!list_empty(&rxq->rx_used)) {
3743                 element = rxq->rx_used.next;
3744                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3745
3746                 /* Alloc a new receive buffer */
3747                 rxb->skb =
3748                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3749                 if (!rxb->skb) {
3750                         if (net_ratelimit())
3751                                 printk(KERN_CRIT DRV_NAME
3752                                        ": Can not allocate SKB buffers\n");
3753                         /* We don't reschedule replenish work here -- we will
3754                          * call the restock method and if it still needs
3755                          * more buffers it will schedule replenish */
3756                         break;
3757                 }
3758
3759                 /* If radiotap head is required, reserve some headroom here.
3760                  * The physical head count is a variable rx_stats->phy_count.
3761                  * We reserve 4 bytes here. Plus these extra bytes, the
3762                  * headroom of the physical head should be enough for the
3763                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3764                  */
3765                 skb_reserve(rxb->skb, 4);
3766
3767                 priv->alloc_rxb_skb++;
3768                 list_del(element);
3769
3770                 /* Get physical address of RB/SKB */
3771                 rxb->dma_addr =
3772                     pci_map_single(priv->pci_dev, rxb->skb->data,
3773                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3774                 list_add_tail(&rxb->list, &rxq->rx_free);
3775                 rxq->free_count++;
3776         }
3777         spin_unlock_irqrestore(&rxq->lock, flags);
3778 }
3779
3780 /*
3781  * this should be called while priv->lock is locked
3782  */
3783 static void __iwl3945_rx_replenish(void *data)
3784 {
3785         struct iwl3945_priv *priv = data;
3786
3787         iwl3945_rx_allocate(priv);
3788         iwl3945_rx_queue_restock(priv);
3789 }
3790
3791
3792 void iwl3945_rx_replenish(void *data)
3793 {
3794         struct iwl3945_priv *priv = data;
3795         unsigned long flags;
3796
3797         iwl3945_rx_allocate(priv);
3798
3799         spin_lock_irqsave(&priv->lock, flags);
3800         iwl3945_rx_queue_restock(priv);
3801         spin_unlock_irqrestore(&priv->lock, flags);
3802 }
3803
3804 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3805  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3806  * This free routine walks the list of POOL entries and if SKB is set to
3807  * non NULL it is unmapped and freed
3808  */
3809 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3810 {
3811         int i;
3812         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3813                 if (rxq->pool[i].skb != NULL) {
3814                         pci_unmap_single(priv->pci_dev,
3815                                          rxq->pool[i].dma_addr,
3816                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3817                         dev_kfree_skb(rxq->pool[i].skb);
3818                 }
3819         }
3820
3821         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3822                             rxq->dma_addr);
3823         rxq->bd = NULL;
3824 }
3825
3826 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3827 {
3828         struct iwl3945_rx_queue *rxq = &priv->rxq;
3829         struct pci_dev *dev = priv->pci_dev;
3830         int i;
3831
3832         spin_lock_init(&rxq->lock);
3833         INIT_LIST_HEAD(&rxq->rx_free);
3834         INIT_LIST_HEAD(&rxq->rx_used);
3835
3836         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3837         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3838         if (!rxq->bd)
3839                 return -ENOMEM;
3840
3841         /* Fill the rx_used queue with _all_ of the Rx buffers */
3842         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3843                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3844
3845         /* Set us so that we have processed and used all buffers, but have
3846          * not restocked the Rx queue with fresh buffers */
3847         rxq->read = rxq->write = 0;
3848         rxq->free_count = 0;
3849         rxq->need_update = 0;
3850         return 0;
3851 }
3852
3853 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3854 {
3855         unsigned long flags;
3856         int i;
3857         spin_lock_irqsave(&rxq->lock, flags);
3858         INIT_LIST_HEAD(&rxq->rx_free);
3859         INIT_LIST_HEAD(&rxq->rx_used);
3860         /* Fill the rx_used queue with _all_ of the Rx buffers */
3861         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3862                 /* In the reset function, these buffers may have been allocated
3863                  * to an SKB, so we need to unmap and free potential storage */
3864                 if (rxq->pool[i].skb != NULL) {
3865                         pci_unmap_single(priv->pci_dev,
3866                                          rxq->pool[i].dma_addr,
3867                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3868                         priv->alloc_rxb_skb--;
3869                         dev_kfree_skb(rxq->pool[i].skb);
3870                         rxq->pool[i].skb = NULL;
3871                 }
3872                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3873         }
3874
3875         /* Set us so that we have processed and used all buffers, but have
3876          * not restocked the Rx queue with fresh buffers */
3877         rxq->read = rxq->write = 0;
3878         rxq->free_count = 0;
3879         spin_unlock_irqrestore(&rxq->lock, flags);
3880 }
3881
3882 /* Convert linear signal-to-noise ratio into dB */
3883 static u8 ratio2dB[100] = {
3884 /*       0   1   2   3   4   5   6   7   8   9 */
3885          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3886         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3887         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3888         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3889         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3890         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3891         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3892         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3893         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3894         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3895 };
3896
3897 /* Calculates a relative dB value from a ratio of linear
3898  *   (i.e. not dB) signal levels.
3899  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3900 int iwl3945_calc_db_from_ratio(int sig_ratio)
3901 {
3902         /* 1000:1 or higher just report as 60 dB */
3903         if (sig_ratio >= 1000)
3904                 return 60;
3905
3906         /* 100:1 or higher, divide by 10 and use table,
3907          *   add 20 dB to make up for divide by 10 */
3908         if (sig_ratio >= 100)
3909                 return (20 + (int)ratio2dB[sig_ratio/10]);
3910
3911         /* We shouldn't see this */
3912         if (sig_ratio < 1)
3913                 return 0;
3914
3915         /* Use table for ratios 1:1 - 99:1 */
3916         return (int)ratio2dB[sig_ratio];
3917 }
3918
3919 #define PERFECT_RSSI (-20) /* dBm */
3920 #define WORST_RSSI (-95)   /* dBm */
3921 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3922
3923 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3924  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3925  *   about formulas used below. */
3926 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3927 {
3928         int sig_qual;
3929         int degradation = PERFECT_RSSI - rssi_dbm;
3930
3931         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3932          * as indicator; formula is (signal dbm - noise dbm).
3933          * SNR at or above 40 is a great signal (100%).
3934          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3935          * Weakest usable signal is usually 10 - 15 dB SNR. */
3936         if (noise_dbm) {
3937                 if (rssi_dbm - noise_dbm >= 40)
3938                         return 100;
3939                 else if (rssi_dbm < noise_dbm)
3940                         return 0;
3941                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3942
3943         /* Else use just the signal level.
3944          * This formula is a least squares fit of data points collected and
3945          *   compared with a reference system that had a percentage (%) display
3946          *   for signal quality. */
3947         } else
3948                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3949                             (15 * RSSI_RANGE + 62 * degradation)) /
3950                            (RSSI_RANGE * RSSI_RANGE);
3951
3952         if (sig_qual > 100)
3953                 sig_qual = 100;
3954         else if (sig_qual < 1)
3955                 sig_qual = 0;
3956
3957         return sig_qual;
3958 }
3959
3960 /**
3961  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3962  *
3963  * Uses the priv->rx_handlers callback function array to invoke
3964  * the appropriate handlers, including command responses,
3965  * frame-received notifications, and other notifications.
3966  */
3967 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3968 {
3969         struct iwl3945_rx_mem_buffer *rxb;
3970         struct iwl3945_rx_packet *pkt;
3971         struct iwl3945_rx_queue *rxq = &priv->rxq;
3972         u32 r, i;
3973         int reclaim;
3974         unsigned long flags;
3975         u8 fill_rx = 0;
3976         u32 count = 8;
3977
3978         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3979          * buffer that the driver may process (last buffer filled by ucode). */
3980         r = iwl3945_hw_get_rx_read(priv);
3981         i = rxq->read;
3982
3983         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3984                 fill_rx = 1;
3985         /* Rx interrupt, but nothing sent from uCode */
3986         if (i == r)
3987                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3988
3989         while (i != r) {
3990                 rxb = rxq->queue[i];
3991
3992                 /* If an RXB doesn't have a Rx queue slot associated with it,
3993                  * then a bug has been introduced in the queue refilling
3994                  * routines -- catch it here */
3995                 BUG_ON(rxb == NULL);
3996
3997                 rxq->queue[i] = NULL;
3998
3999                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4000                                             IWL_RX_BUF_SIZE,
4001                                             PCI_DMA_FROMDEVICE);
4002                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4003
4004                 /* Reclaim a command buffer only if this packet is a response
4005                  *   to a (driver-originated) command.
4006                  * If the packet (e.g. Rx frame) originated from uCode,
4007                  *   there is no command buffer to reclaim.
4008                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4009                  *   but apparently a few don't get set; catch them here. */
4010                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4011                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4012                         (pkt->hdr.cmd != REPLY_TX);
4013
4014                 /* Based on type of command response or notification,
4015                  *   handle those that need handling via function in
4016                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4017                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4018                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4019                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4020                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4021                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4022                 } else {
4023                         /* No handling needed */
4024                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4025                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4026                                 r, i, get_cmd_string(pkt->hdr.cmd),
4027                                 pkt->hdr.cmd);
4028                 }
4029
4030                 if (reclaim) {
4031                         /* Invoke any callbacks, transfer the skb to caller, and
4032                          * fire off the (possibly) blocking iwl3945_send_cmd()
4033                          * as we reclaim the driver command queue */
4034                         if (rxb && rxb->skb)
4035                                 iwl3945_tx_cmd_complete(priv, rxb);
4036                         else
4037                                 IWL_WARNING("Claim null rxb?\n");
4038                 }
4039
4040                 /* For now we just don't re-use anything.  We can tweak this
4041                  * later to try and re-use notification packets and SKBs that
4042                  * fail to Rx correctly */
4043                 if (rxb->skb != NULL) {
4044                         priv->alloc_rxb_skb--;
4045                         dev_kfree_skb_any(rxb->skb);
4046                         rxb->skb = NULL;
4047                 }
4048
4049                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4050                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4051                 spin_lock_irqsave(&rxq->lock, flags);
4052                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4053                 spin_unlock_irqrestore(&rxq->lock, flags);
4054                 i = (i + 1) & RX_QUEUE_MASK;
4055                 /* If there are a lot of unused frames,
4056                  * restock the Rx queue so ucode won't assert. */
4057                 if (fill_rx) {
4058                         count++;
4059                         if (count >= 8) {
4060                                 priv->rxq.read = i;
4061                                 __iwl3945_rx_replenish(priv);
4062                                 count = 0;
4063                         }
4064                 }
4065         }
4066
4067         /* Backtrack one entry */
4068         priv->rxq.read = i;
4069         iwl3945_rx_queue_restock(priv);
4070 }
4071
4072 /**
4073  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4074  */
4075 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4076                                   struct iwl3945_tx_queue *txq)
4077 {
4078         u32 reg = 0;
4079         int rc = 0;
4080         int txq_id = txq->q.id;
4081
4082         if (txq->need_update == 0)
4083                 return rc;
4084
4085         /* if we're trying to save power */
4086         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4087                 /* wake up nic if it's powered down ...
4088                  * uCode will wake up, and interrupt us again, so next
4089                  * time we'll skip this part. */
4090                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4091
4092                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4093                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4094                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4095                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4096                         return rc;
4097                 }
4098
4099                 /* restore this queue's parameters in nic hardware. */
4100                 rc = iwl3945_grab_nic_access(priv);
4101                 if (rc)
4102                         return rc;
4103                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4104                                      txq->q.write_ptr | (txq_id << 8));
4105                 iwl3945_release_nic_access(priv);
4106
4107         /* else not in power-save mode, uCode will never sleep when we're
4108          * trying to tx (during RFKILL, we're not trying to tx). */
4109         } else
4110                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4111                             txq->q.write_ptr | (txq_id << 8));
4112
4113         txq->need_update = 0;
4114
4115         return rc;
4116 }
4117
4118 #ifdef CONFIG_IWL3945_DEBUG
4119 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4120 {
4121         DECLARE_MAC_BUF(mac);
4122
4123         IWL_DEBUG_RADIO("RX CONFIG:\n");
4124         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4125         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4126         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4127         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4128                         le32_to_cpu(rxon->filter_flags));
4129         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4130         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4131                         rxon->ofdm_basic_rates);
4132         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4133         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4134                         print_mac(mac, rxon->node_addr));
4135         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4136                         print_mac(mac, rxon->bssid_addr));
4137         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4138 }
4139 #endif
4140
4141 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4142 {
4143         IWL_DEBUG_ISR("Enabling interrupts\n");
4144         set_bit(STATUS_INT_ENABLED, &priv->status);
4145         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4146 }
4147
4148
4149 /* call this function to flush any scheduled tasklet */
4150 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
4151 {
4152         /* wait to make sure we flush pedding tasklet*/
4153         synchronize_irq(priv->pci_dev->irq);
4154         tasklet_kill(&priv->irq_tasklet);
4155 }
4156
4157
4158 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4159 {
4160         clear_bit(STATUS_INT_ENABLED, &priv->status);
4161
4162         /* disable interrupts from uCode/NIC to host */
4163         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4164
4165         /* acknowledge/clear/reset any interrupts still pending
4166          * from uCode or flow handler (Rx/Tx DMA) */
4167         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4168         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4169         IWL_DEBUG_ISR("Disabled interrupts\n");
4170 }
4171
4172 static const char *desc_lookup(int i)
4173 {
4174         switch (i) {
4175         case 1:
4176                 return "FAIL";
4177         case 2:
4178                 return "BAD_PARAM";
4179         case 3:
4180                 return "BAD_CHECKSUM";
4181         case 4:
4182                 return "NMI_INTERRUPT";
4183         case 5:
4184                 return "SYSASSERT";
4185         case 6:
4186                 return "FATAL_ERROR";
4187         }
4188
4189         return "UNKNOWN";
4190 }
4191
4192 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4193 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4194
4195 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4196 {
4197         u32 i;
4198         u32 desc, time, count, base, data1;
4199         u32 blink1, blink2, ilink1, ilink2;
4200         int rc;
4201
4202         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4203
4204         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4205                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4206                 return;
4207         }
4208
4209         rc = iwl3945_grab_nic_access(priv);
4210         if (rc) {
4211                 IWL_WARNING("Can not read from adapter at this time.\n");
4212                 return;
4213         }
4214
4215         count = iwl3945_read_targ_mem(priv, base);
4216
4217         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4218                 IWL_ERROR("Start IWL Error Log Dump:\n");
4219                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4220         }
4221
4222         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4223                   "ilink1  nmiPC   Line\n");
4224         for (i = ERROR_START_OFFSET;
4225              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4226              i += ERROR_ELEM_SIZE) {
4227                 desc = iwl3945_read_targ_mem(priv, base + i);
4228                 time =
4229                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4230                 blink1 =
4231                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4232                 blink2 =
4233                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4234                 ilink1 =
4235                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4236                 ilink2 =
4237                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4238                 data1 =
4239                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4240
4241                 IWL_ERROR
4242                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4243                      desc_lookup(desc), desc, time, blink1, blink2,
4244                      ilink1, ilink2, data1);
4245         }
4246
4247         iwl3945_release_nic_access(priv);
4248
4249 }
4250
4251 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4252
4253 /**
4254  * iwl3945_print_event_log - Dump error event log to syslog
4255  *
4256  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4257  */
4258 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4259                                 u32 num_events, u32 mode)
4260 {
4261         u32 i;
4262         u32 base;       /* SRAM byte address of event log header */
4263         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4264         u32 ptr;        /* SRAM byte address of log data */
4265         u32 ev, time, data; /* event log data */
4266
4267         if (num_events == 0)
4268                 return;
4269
4270         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4271
4272         if (mode == 0)
4273                 event_size = 2 * sizeof(u32);
4274         else
4275                 event_size = 3 * sizeof(u32);
4276
4277         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4278
4279         /* "time" is actually "data" for mode 0 (no timestamp).
4280          * place event id # at far right for easier visual parsing. */
4281         for (i = 0; i < num_events; i++) {
4282                 ev = iwl3945_read_targ_mem(priv, ptr);
4283                 ptr += sizeof(u32);
4284                 time = iwl3945_read_targ_mem(priv, ptr);
4285                 ptr += sizeof(u32);
4286                 if (mode == 0)
4287                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4288                 else {
4289                         data = iwl3945_read_targ_mem(priv, ptr);
4290                         ptr += sizeof(u32);
4291                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4292                 }
4293         }
4294 }
4295
4296 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4297 {
4298         int rc;
4299         u32 base;       /* SRAM byte address of event log header */
4300         u32 capacity;   /* event log capacity in # entries */
4301         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4302         u32 num_wraps;  /* # times uCode wrapped to top of log */
4303         u32 next_entry; /* index of next entry to be written by uCode */
4304         u32 size;       /* # entries that we'll print */
4305
4306         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4307         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4308                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4309                 return;
4310         }
4311
4312         rc = iwl3945_grab_nic_access(priv);
4313         if (rc) {
4314                 IWL_WARNING("Can not read from adapter at this time.\n");
4315                 return;
4316         }
4317
4318         /* event log header */
4319         capacity = iwl3945_read_targ_mem(priv, base);
4320         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4321         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4322         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4323
4324         size = num_wraps ? capacity : next_entry;
4325
4326         /* bail out if nothing in log */
4327         if (size == 0) {
4328                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4329                 iwl3945_release_nic_access(priv);
4330                 return;
4331         }
4332
4333         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4334                   size, num_wraps);
4335
4336         /* if uCode has wrapped back to top of log, start at the oldest entry,
4337          * i.e the next one that uCode would fill. */
4338         if (num_wraps)
4339                 iwl3945_print_event_log(priv, next_entry,
4340                                     capacity - next_entry, mode);
4341
4342         /* (then/else) start at top of log */
4343         iwl3945_print_event_log(priv, 0, next_entry, mode);
4344
4345         iwl3945_release_nic_access(priv);
4346 }
4347
4348 /**
4349  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4350  */
4351 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4352 {
4353         /* Set the FW error flag -- cleared on iwl3945_down */
4354         set_bit(STATUS_FW_ERROR, &priv->status);
4355
4356         /* Cancel currently queued command. */
4357         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4358
4359 #ifdef CONFIG_IWL3945_DEBUG
4360         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4361                 iwl3945_dump_nic_error_log(priv);
4362                 iwl3945_dump_nic_event_log(priv);
4363                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4364         }
4365 #endif
4366
4367         wake_up_interruptible(&priv->wait_command_queue);
4368
4369         /* Keep the restart process from trying to send host
4370          * commands by clearing the INIT status bit */
4371         clear_bit(STATUS_READY, &priv->status);
4372
4373         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4374                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4375                           "Restarting adapter due to uCode error.\n");
4376
4377                 if (iwl3945_is_associated(priv)) {
4378                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4379                                sizeof(priv->recovery_rxon));
4380                         priv->error_recovering = 1;
4381                 }
4382                 queue_work(priv->workqueue, &priv->restart);
4383         }
4384 }
4385
4386 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4387 {
4388         unsigned long flags;
4389
4390         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4391                sizeof(priv->staging_rxon));
4392         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4393         iwl3945_commit_rxon(priv);
4394
4395         iwl3945_add_station(priv, priv->bssid, 1, 0);
4396
4397         spin_lock_irqsave(&priv->lock, flags);
4398         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4399         priv->error_recovering = 0;
4400         spin_unlock_irqrestore(&priv->lock, flags);
4401 }
4402
4403 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4404 {
4405         u32 inta, handled = 0;
4406         u32 inta_fh;
4407         unsigned long flags;
4408 #ifdef CONFIG_IWL3945_DEBUG
4409         u32 inta_mask;
4410 #endif
4411
4412         spin_lock_irqsave(&priv->lock, flags);
4413
4414         /* Ack/clear/reset pending uCode interrupts.
4415          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4416          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4417         inta = iwl3945_read32(priv, CSR_INT);
4418         iwl3945_write32(priv, CSR_INT, inta);
4419
4420         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4421          * Any new interrupts that happen after this, either while we're
4422          * in this tasklet, or later, will show up in next ISR/tasklet. */
4423         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4424         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4425
4426 #ifdef CONFIG_IWL3945_DEBUG
4427         if (iwl3945_debug_level & IWL_DL_ISR) {
4428                 /* just for debug */
4429                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4430                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4431                               inta, inta_mask, inta_fh);
4432         }
4433 #endif
4434
4435         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4436          * atomic, make sure that inta covers all the interrupts that
4437          * we've discovered, even if FH interrupt came in just after
4438          * reading CSR_INT. */
4439         if (inta_fh & CSR39_FH_INT_RX_MASK)
4440                 inta |= CSR_INT_BIT_FH_RX;
4441         if (inta_fh & CSR39_FH_INT_TX_MASK)
4442                 inta |= CSR_INT_BIT_FH_TX;
4443
4444         /* Now service all interrupt bits discovered above. */
4445         if (inta & CSR_INT_BIT_HW_ERR) {
4446                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4447
4448                 /* Tell the device to stop sending interrupts */
4449                 iwl3945_disable_interrupts(priv);
4450
4451                 iwl3945_irq_handle_error(priv);
4452
4453                 handled |= CSR_INT_BIT_HW_ERR;
4454
4455                 spin_unlock_irqrestore(&priv->lock, flags);
4456
4457                 return;
4458         }
4459
4460 #ifdef CONFIG_IWL3945_DEBUG
4461         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4462                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4463                 if (inta & CSR_INT_BIT_SCD)
4464                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4465                                       "the frame/frames.\n");
4466
4467                 /* Alive notification via Rx interrupt will do the real work */
4468                 if (inta & CSR_INT_BIT_ALIVE)
4469                         IWL_DEBUG_ISR("Alive interrupt\n");
4470         }
4471 #endif
4472         /* Safely ignore these bits for debug checks below */
4473         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4474
4475         /* HW RF KILL switch toggled (4965 only) */
4476         if (inta & CSR_INT_BIT_RF_KILL) {
4477                 int hw_rf_kill = 0;
4478                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4479                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4480                         hw_rf_kill = 1;
4481
4482                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4483                                 "RF_KILL bit toggled to %s.\n",
4484                                 hw_rf_kill ? "disable radio":"enable radio");
4485
4486                 /* Queue restart only if RF_KILL switch was set to "kill"
4487                  *   when we loaded driver, and is now set to "enable".
4488                  * After we're Alive, RF_KILL gets handled by
4489                  *   iwl3945_rx_card_state_notif() */
4490                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4491                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4492                         queue_work(priv->workqueue, &priv->restart);
4493                 }
4494
4495                 handled |= CSR_INT_BIT_RF_KILL;
4496         }
4497
4498         /* Chip got too hot and stopped itself (4965 only) */
4499         if (inta & CSR_INT_BIT_CT_KILL) {
4500                 IWL_ERROR("Microcode CT kill error detected.\n");
4501                 handled |= CSR_INT_BIT_CT_KILL;
4502         }
4503
4504         /* Error detected by uCode */
4505         if (inta & CSR_INT_BIT_SW_ERR) {
4506                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4507                           inta);
4508                 iwl3945_irq_handle_error(priv);
4509                 handled |= CSR_INT_BIT_SW_ERR;
4510         }
4511
4512         /* uCode wakes up after power-down sleep */
4513         if (inta & CSR_INT_BIT_WAKEUP) {
4514                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4515                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4516                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4517                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4518                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4519                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4520                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4521                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4522
4523                 handled |= CSR_INT_BIT_WAKEUP;
4524         }
4525
4526         /* All uCode command responses, including Tx command responses,
4527          * Rx "responses" (frame-received notification), and other
4528          * notifications from uCode come through here*/
4529         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4530                 iwl3945_rx_handle(priv);
4531                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4532         }
4533
4534         if (inta & CSR_INT_BIT_FH_TX) {
4535                 IWL_DEBUG_ISR("Tx interrupt\n");
4536
4537                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4538                 if (!iwl3945_grab_nic_access(priv)) {
4539                         iwl3945_write_direct32(priv,
4540                                              FH_TCSR_CREDIT
4541                                              (ALM_FH_SRVC_CHNL), 0x0);
4542                         iwl3945_release_nic_access(priv);
4543                 }
4544                 handled |= CSR_INT_BIT_FH_TX;
4545         }
4546
4547         if (inta & ~handled)
4548                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4549
4550         if (inta & ~CSR_INI_SET_MASK) {
4551                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4552                          inta & ~CSR_INI_SET_MASK);
4553                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4554         }
4555
4556         /* Re-enable all interrupts */
4557         /* only Re-enable if disabled by irq */
4558         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4559                 iwl3945_enable_interrupts(priv);
4560
4561 #ifdef CONFIG_IWL3945_DEBUG
4562         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4563                 inta = iwl3945_read32(priv, CSR_INT);
4564                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4565                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4566                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4567                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4568         }
4569 #endif
4570         spin_unlock_irqrestore(&priv->lock, flags);
4571 }
4572
4573 static irqreturn_t iwl3945_isr(int irq, void *data)
4574 {
4575         struct iwl3945_priv *priv = data;
4576         u32 inta, inta_mask;
4577         u32 inta_fh;
4578         if (!priv)
4579                 return IRQ_NONE;
4580
4581         spin_lock(&priv->lock);
4582
4583         /* Disable (but don't clear!) interrupts here to avoid
4584          *    back-to-back ISRs and sporadic interrupts from our NIC.
4585          * If we have something to service, the tasklet will re-enable ints.
4586          * If we *don't* have something, we'll re-enable before leaving here. */
4587         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4588         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4589
4590         /* Discover which interrupts are active/pending */
4591         inta = iwl3945_read32(priv, CSR_INT);
4592         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4593
4594         /* Ignore interrupt if there's nothing in NIC to service.
4595          * This may be due to IRQ shared with another device,
4596          * or due to sporadic interrupts thrown from our NIC. */
4597         if (!inta && !inta_fh) {
4598                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4599                 goto none;
4600         }
4601
4602         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4603                 /* Hardware disappeared */
4604                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4605                 goto unplugged;
4606         }
4607
4608         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4609                       inta, inta_mask, inta_fh);
4610
4611         inta &= ~CSR_INT_BIT_SCD;
4612
4613         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4614         if (likely(inta || inta_fh))
4615                 tasklet_schedule(&priv->irq_tasklet);
4616 unplugged:
4617         spin_unlock(&priv->lock);
4618
4619         return IRQ_HANDLED;
4620
4621  none:
4622         /* re-enable interrupts here since we don't have anything to service. */
4623         /* only Re-enable if disabled by irq */
4624         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4625                 iwl3945_enable_interrupts(priv);
4626         spin_unlock(&priv->lock);
4627         return IRQ_NONE;
4628 }
4629
4630 /************************** EEPROM BANDS ****************************
4631  *
4632  * The iwl3945_eeprom_band definitions below provide the mapping from the
4633  * EEPROM contents to the specific channel number supported for each
4634  * band.
4635  *
4636  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4637  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4638  * The specific geography and calibration information for that channel
4639  * is contained in the eeprom map itself.
4640  *
4641  * During init, we copy the eeprom information and channel map
4642  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4643  *
4644  * channel_map_24/52 provides the index in the channel_info array for a
4645  * given channel.  We have to have two separate maps as there is channel
4646  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4647  * band_2
4648  *
4649  * A value of 0xff stored in the channel_map indicates that the channel
4650  * is not supported by the hardware at all.
4651  *
4652  * A value of 0xfe in the channel_map indicates that the channel is not
4653  * valid for Tx with the current hardware.  This means that
4654  * while the system can tune and receive on a given channel, it may not
4655  * be able to associate or transmit any frames on that
4656  * channel.  There is no corresponding channel information for that
4657  * entry.
4658  *
4659  *********************************************************************/
4660
4661 /* 2.4 GHz */
4662 static const u8 iwl3945_eeprom_band_1[14] = {
4663         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4664 };
4665
4666 /* 5.2 GHz bands */
4667 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4668         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4669 };
4670
4671 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4672         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4673 };
4674
4675 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4676         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4677 };
4678
4679 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4680         145, 149, 153, 157, 161, 165
4681 };
4682
4683 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4684                                     int *eeprom_ch_count,
4685                                     const struct iwl3945_eeprom_channel
4686                                     **eeprom_ch_info,
4687                                     const u8 **eeprom_ch_index)
4688 {
4689         switch (band) {
4690         case 1:         /* 2.4GHz band */
4691                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4692                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4693                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4694                 break;
4695         case 2:         /* 4.9GHz band */
4696                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4697                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4698                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4699                 break;
4700         case 3:         /* 5.2GHz band */
4701                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4702                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4703                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4704                 break;
4705         case 4:         /* 5.5GHz band */
4706                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4707                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4708                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4709                 break;
4710         case 5:         /* 5.7GHz band */
4711                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4712                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4713                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4714                 break;
4715         default:
4716                 BUG();
4717                 return;
4718         }
4719 }
4720
4721 /**
4722  * iwl3945_get_channel_info - Find driver's private channel info
4723  *
4724  * Based on band and channel number.
4725  */
4726 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4727                                                     enum ieee80211_band band, u16 channel)
4728 {
4729         int i;
4730
4731         switch (band) {
4732         case IEEE80211_BAND_5GHZ:
4733                 for (i = 14; i < priv->channel_count; i++) {
4734                         if (priv->channel_info[i].channel == channel)
4735                                 return &priv->channel_info[i];
4736                 }
4737                 break;
4738
4739         case IEEE80211_BAND_2GHZ:
4740                 if (channel >= 1 && channel <= 14)
4741                         return &priv->channel_info[channel - 1];
4742                 break;
4743         case IEEE80211_NUM_BANDS:
4744                 WARN_ON(1);
4745         }
4746
4747         return NULL;
4748 }
4749
4750 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4751                             ? # x " " : "")
4752
4753 /**
4754  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4755  */
4756 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4757 {
4758         int eeprom_ch_count = 0;
4759         const u8 *eeprom_ch_index = NULL;
4760         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4761         int band, ch;
4762         struct iwl3945_channel_info *ch_info;
4763
4764         if (priv->channel_count) {
4765                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4766                 return 0;
4767         }
4768
4769         if (priv->eeprom.version < 0x2f) {
4770                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4771                             priv->eeprom.version);
4772                 return -EINVAL;
4773         }
4774
4775         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4776
4777         priv->channel_count =
4778             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4779             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4780             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4781             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4782             ARRAY_SIZE(iwl3945_eeprom_band_5);
4783
4784         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4785
4786         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4787                                      priv->channel_count, GFP_KERNEL);
4788         if (!priv->channel_info) {
4789                 IWL_ERROR("Could not allocate channel_info\n");
4790                 priv->channel_count = 0;
4791                 return -ENOMEM;
4792         }
4793
4794         ch_info = priv->channel_info;
4795
4796         /* Loop through the 5 EEPROM bands adding them in order to the
4797          * channel map we maintain (that contains additional information than
4798          * what just in the EEPROM) */
4799         for (band = 1; band <= 5; band++) {
4800
4801                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4802                                         &eeprom_ch_info, &eeprom_ch_index);
4803
4804                 /* Loop through each band adding each of the channels */
4805                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4806                         ch_info->channel = eeprom_ch_index[ch];
4807                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4808                             IEEE80211_BAND_5GHZ;
4809
4810                         /* permanently store EEPROM's channel regulatory flags
4811                          *   and max power in channel info database. */
4812                         ch_info->eeprom = eeprom_ch_info[ch];
4813
4814                         /* Copy the run-time flags so they are there even on
4815                          * invalid channels */
4816                         ch_info->flags = eeprom_ch_info[ch].flags;
4817
4818                         if (!(is_channel_valid(ch_info))) {
4819                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4820                                                "No traffic\n",
4821                                                ch_info->channel,
4822                                                ch_info->flags,
4823                                                is_channel_a_band(ch_info) ?
4824                                                "5.2" : "2.4");
4825                                 ch_info++;
4826                                 continue;
4827                         }
4828
4829                         /* Initialize regulatory-based run-time data */
4830                         ch_info->max_power_avg = ch_info->curr_txpow =
4831                             eeprom_ch_info[ch].max_power_avg;
4832                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4833                         ch_info->min_power = 0;
4834
4835                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
4836                                        " %ddBm): Ad-Hoc %ssupported\n",
4837                                        ch_info->channel,
4838                                        is_channel_a_band(ch_info) ?
4839                                        "5.2" : "2.4",
4840                                        CHECK_AND_PRINT(VALID),
4841                                        CHECK_AND_PRINT(IBSS),
4842                                        CHECK_AND_PRINT(ACTIVE),
4843                                        CHECK_AND_PRINT(RADAR),
4844                                        CHECK_AND_PRINT(WIDE),
4845                                        CHECK_AND_PRINT(DFS),
4846                                        eeprom_ch_info[ch].flags,
4847                                        eeprom_ch_info[ch].max_power_avg,
4848                                        ((eeprom_ch_info[ch].
4849                                          flags & EEPROM_CHANNEL_IBSS)
4850                                         && !(eeprom_ch_info[ch].
4851                                              flags & EEPROM_CHANNEL_RADAR))
4852                                        ? "" : "not ");
4853
4854                         /* Set the user_txpower_limit to the highest power
4855                          * supported by any channel */
4856                         if (eeprom_ch_info[ch].max_power_avg >
4857                             priv->user_txpower_limit)
4858                                 priv->user_txpower_limit =
4859                                     eeprom_ch_info[ch].max_power_avg;
4860
4861                         ch_info++;
4862                 }
4863         }
4864
4865         /* Set up txpower settings in driver for all channels */
4866         if (iwl3945_txpower_set_from_eeprom(priv))
4867                 return -EIO;
4868
4869         return 0;
4870 }
4871
4872 /*
4873  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4874  */
4875 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4876 {
4877         kfree(priv->channel_info);
4878         priv->channel_count = 0;
4879 }
4880
4881 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4882  * sending probe req.  This should be set long enough to hear probe responses
4883  * from more than one AP.  */
4884 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4885 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4886
4887 /* For faster active scanning, scan will move to the next channel if fewer than
4888  * PLCP_QUIET_THRESH packets are heard on this channel within
4889  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4890  * time if it's a quiet channel (nothing responded to our probe, and there's
4891  * no other traffic).
4892  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4893 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4894 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4895
4896 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4897  * Must be set longer than active dwell time.
4898  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4899 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4900 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4901 #define IWL_PASSIVE_DWELL_BASE      (100)
4902 #define IWL_CHANNEL_TUNE_TIME       5
4903
4904 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4905                                                 enum ieee80211_band band)
4906 {
4907         if (band == IEEE80211_BAND_5GHZ)
4908                 return IWL_ACTIVE_DWELL_TIME_52;
4909         else
4910                 return IWL_ACTIVE_DWELL_TIME_24;
4911 }
4912
4913 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4914                                           enum ieee80211_band band)
4915 {
4916         u16 active = iwl3945_get_active_dwell_time(priv, band);
4917         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4918             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4919             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4920
4921         if (iwl3945_is_associated(priv)) {
4922                 /* If we're associated, we clamp the maximum passive
4923                  * dwell time to be 98% of the beacon interval (minus
4924                  * 2 * channel tune time) */
4925                 passive = priv->beacon_int;
4926                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4927                         passive = IWL_PASSIVE_DWELL_BASE;
4928                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4929         }
4930
4931         if (passive <= active)
4932                 passive = active + 1;
4933
4934         return passive;
4935 }
4936
4937 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4938                                          enum ieee80211_band band,
4939                                      u8 is_active, u8 direct_mask,
4940                                      struct iwl3945_scan_channel *scan_ch)
4941 {
4942         const struct ieee80211_channel *channels = NULL;
4943         const struct ieee80211_supported_band *sband;
4944         const struct iwl3945_channel_info *ch_info;
4945         u16 passive_dwell = 0;
4946         u16 active_dwell = 0;
4947         int added, i;
4948
4949         sband = iwl3945_get_band(priv, band);
4950         if (!sband)
4951                 return 0;
4952
4953         channels = sband->channels;
4954
4955         active_dwell = iwl3945_get_active_dwell_time(priv, band);
4956         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4957
4958         for (i = 0, added = 0; i < sband->n_channels; i++) {
4959                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4960                         continue;
4961
4962                 scan_ch->channel = channels[i].hw_value;
4963
4964                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4965                 if (!is_channel_valid(ch_info)) {
4966                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4967                                        scan_ch->channel);
4968                         continue;
4969                 }
4970
4971                 if (!is_active || is_channel_passive(ch_info) ||
4972                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4973                         scan_ch->type = 0;      /* passive */
4974                 else
4975                         scan_ch->type = 1;      /* active */
4976
4977                 if (scan_ch->type & 1)
4978                         scan_ch->type |= (direct_mask << 1);
4979
4980                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4981                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4982
4983                 /* Set txpower levels to defaults */
4984                 scan_ch->tpc.dsp_atten = 110;
4985                 /* scan_pwr_info->tpc.dsp_atten; */
4986
4987                 /*scan_pwr_info->tpc.tx_gain; */
4988                 if (band == IEEE80211_BAND_5GHZ)
4989                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4990                 else {
4991                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4992                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4993                          * power level:
4994                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4995                          */
4996                 }
4997
4998                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4999                                scan_ch->channel,
5000                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5001                                (scan_ch->type & 1) ?
5002                                active_dwell : passive_dwell);
5003
5004                 scan_ch++;
5005                 added++;
5006         }
5007
5008         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5009         return added;
5010 }
5011
5012 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5013                               struct ieee80211_rate *rates)
5014 {
5015         int i;
5016
5017         for (i = 0; i < IWL_RATE_COUNT; i++) {
5018                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
5019                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5020                 rates[i].hw_value_short = i;
5021                 rates[i].flags = 0;
5022                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5023                         /*
5024                          * If CCK != 1M then set short preamble rate flag.
5025                          */
5026                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5027                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5028                 }
5029         }
5030 }
5031
5032 /**
5033  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5034  */
5035 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5036 {
5037         struct iwl3945_channel_info *ch;
5038         struct ieee80211_supported_band *sband;
5039         struct ieee80211_channel *channels;
5040         struct ieee80211_channel *geo_ch;
5041         struct ieee80211_rate *rates;
5042         int i = 0;
5043
5044         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5045             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5046                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5047                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5048                 return 0;
5049         }
5050
5051         channels = kzalloc(sizeof(struct ieee80211_channel) *
5052                            priv->channel_count, GFP_KERNEL);
5053         if (!channels)
5054                 return -ENOMEM;
5055
5056         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5057                         GFP_KERNEL);
5058         if (!rates) {
5059                 kfree(channels);
5060                 return -ENOMEM;
5061         }
5062
5063         /* 5.2GHz channels start after the 2.4GHz channels */
5064         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5065         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5066         /* just OFDM */
5067         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5068         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5069
5070         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5071         sband->channels = channels;
5072         /* OFDM & CCK */
5073         sband->bitrates = rates;
5074         sband->n_bitrates = IWL_RATE_COUNT;
5075
5076         priv->ieee_channels = channels;
5077         priv->ieee_rates = rates;
5078
5079         iwl3945_init_hw_rates(priv, rates);
5080
5081         for (i = 0;  i < priv->channel_count; i++) {
5082                 ch = &priv->channel_info[i];
5083
5084                 /* FIXME: might be removed if scan is OK*/
5085                 if (!is_channel_valid(ch))
5086                         continue;
5087
5088                 if (is_channel_a_band(ch))
5089                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5090                 else
5091                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5092
5093                 geo_ch = &sband->channels[sband->n_channels++];
5094
5095                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5096                 geo_ch->max_power = ch->max_power_avg;
5097                 geo_ch->max_antenna_gain = 0xff;
5098                 geo_ch->hw_value = ch->channel;
5099
5100                 if (is_channel_valid(ch)) {
5101                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5102                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5103
5104                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5105                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5106
5107                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5108                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5109
5110                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5111                                 priv->max_channel_txpower_limit =
5112                                     ch->max_power_avg;
5113                 } else {
5114                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5115                 }
5116
5117                 /* Save flags for reg domain usage */
5118                 geo_ch->orig_flags = geo_ch->flags;
5119
5120                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5121                                 ch->channel, geo_ch->center_freq,
5122                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5123                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5124                                 "restricted" : "valid",
5125                                  geo_ch->flags);
5126         }
5127
5128         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5129              priv->cfg->sku & IWL_SKU_A) {
5130                 printk(KERN_INFO DRV_NAME
5131                        ": Incorrectly detected BG card as ABG.  Please send "
5132                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5133                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5134                  priv->cfg->sku &= ~IWL_SKU_A;
5135         }
5136
5137         printk(KERN_INFO DRV_NAME
5138                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5139                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5140                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5141
5142         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5143                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5144                         &priv->bands[IEEE80211_BAND_2GHZ];
5145         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5146                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5147                         &priv->bands[IEEE80211_BAND_5GHZ];
5148
5149         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5150
5151         return 0;
5152 }
5153
5154 /*
5155  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5156  */
5157 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5158 {
5159         kfree(priv->ieee_channels);
5160         kfree(priv->ieee_rates);
5161         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5162 }
5163
5164 /******************************************************************************
5165  *
5166  * uCode download functions
5167  *
5168  ******************************************************************************/
5169
5170 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5171 {
5172         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5173         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5174         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5175         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5176         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5177         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5178 }
5179
5180 /**
5181  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5182  *     looking at all data.
5183  */
5184 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5185 {
5186         u32 val;
5187         u32 save_len = len;
5188         int rc = 0;
5189         u32 errcnt;
5190
5191         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5192
5193         rc = iwl3945_grab_nic_access(priv);
5194         if (rc)
5195                 return rc;
5196
5197         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5198
5199         errcnt = 0;
5200         for (; len > 0; len -= sizeof(u32), image++) {
5201                 /* read data comes through single port, auto-incr addr */
5202                 /* NOTE: Use the debugless read so we don't flood kernel log
5203                  * if IWL_DL_IO is set */
5204                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5205                 if (val != le32_to_cpu(*image)) {
5206                         IWL_ERROR("uCode INST section is invalid at "
5207                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5208                                   save_len - len, val, le32_to_cpu(*image));
5209                         rc = -EIO;
5210                         errcnt++;
5211                         if (errcnt >= 20)
5212                                 break;
5213                 }
5214         }
5215
5216         iwl3945_release_nic_access(priv);
5217
5218         if (!errcnt)
5219                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5220
5221         return rc;
5222 }
5223
5224
5225 /**
5226  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5227  *   using sample data 100 bytes apart.  If these sample points are good,
5228  *   it's a pretty good bet that everything between them is good, too.
5229  */
5230 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5231 {
5232         u32 val;
5233         int rc = 0;
5234         u32 errcnt = 0;
5235         u32 i;
5236
5237         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5238
5239         rc = iwl3945_grab_nic_access(priv);
5240         if (rc)
5241                 return rc;
5242
5243         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5244                 /* read data comes through single port, auto-incr addr */
5245                 /* NOTE: Use the debugless read so we don't flood kernel log
5246                  * if IWL_DL_IO is set */
5247                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5248                         i + RTC_INST_LOWER_BOUND);
5249                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5250                 if (val != le32_to_cpu(*image)) {
5251 #if 0 /* Enable this if you want to see details */
5252                         IWL_ERROR("uCode INST section is invalid at "
5253                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5254                                   i, val, *image);
5255 #endif
5256                         rc = -EIO;
5257                         errcnt++;
5258                         if (errcnt >= 3)
5259                                 break;
5260                 }
5261         }
5262
5263         iwl3945_release_nic_access(priv);
5264
5265         return rc;
5266 }
5267
5268
5269 /**
5270  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5271  *    and verify its contents
5272  */
5273 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5274 {
5275         __le32 *image;
5276         u32 len;
5277         int rc = 0;
5278
5279         /* Try bootstrap */
5280         image = (__le32 *)priv->ucode_boot.v_addr;
5281         len = priv->ucode_boot.len;
5282         rc = iwl3945_verify_inst_sparse(priv, image, len);
5283         if (rc == 0) {
5284                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5285                 return 0;
5286         }
5287
5288         /* Try initialize */
5289         image = (__le32 *)priv->ucode_init.v_addr;
5290         len = priv->ucode_init.len;
5291         rc = iwl3945_verify_inst_sparse(priv, image, len);
5292         if (rc == 0) {
5293                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5294                 return 0;
5295         }
5296
5297         /* Try runtime/protocol */
5298         image = (__le32 *)priv->ucode_code.v_addr;
5299         len = priv->ucode_code.len;
5300         rc = iwl3945_verify_inst_sparse(priv, image, len);
5301         if (rc == 0) {
5302                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5303                 return 0;
5304         }
5305
5306         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5307
5308         /* Since nothing seems to match, show first several data entries in
5309          * instruction SRAM, so maybe visual inspection will give a clue.
5310          * Selection of bootstrap image (vs. other images) is arbitrary. */
5311         image = (__le32 *)priv->ucode_boot.v_addr;
5312         len = priv->ucode_boot.len;
5313         rc = iwl3945_verify_inst_full(priv, image, len);
5314
5315         return rc;
5316 }
5317
5318
5319 /* check contents of special bootstrap uCode SRAM */
5320 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5321 {
5322         __le32 *image = priv->ucode_boot.v_addr;
5323         u32 len = priv->ucode_boot.len;
5324         u32 reg;
5325         u32 val;
5326
5327         IWL_DEBUG_INFO("Begin verify bsm\n");
5328
5329         /* verify BSM SRAM contents */
5330         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5331         for (reg = BSM_SRAM_LOWER_BOUND;
5332              reg < BSM_SRAM_LOWER_BOUND + len;
5333              reg += sizeof(u32), image ++) {
5334                 val = iwl3945_read_prph(priv, reg);
5335                 if (val != le32_to_cpu(*image)) {
5336                         IWL_ERROR("BSM uCode verification failed at "
5337                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5338                                   BSM_SRAM_LOWER_BOUND,
5339                                   reg - BSM_SRAM_LOWER_BOUND, len,
5340                                   val, le32_to_cpu(*image));
5341                         return -EIO;
5342                 }
5343         }
5344
5345         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5346
5347         return 0;
5348 }
5349
5350 /**
5351  * iwl3945_load_bsm - Load bootstrap instructions
5352  *
5353  * BSM operation:
5354  *
5355  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5356  * in special SRAM that does not power down during RFKILL.  When powering back
5357  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5358  * the bootstrap program into the on-board processor, and starts it.
5359  *
5360  * The bootstrap program loads (via DMA) instructions and data for a new
5361  * program from host DRAM locations indicated by the host driver in the
5362  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5363  * automatically.
5364  *
5365  * When initializing the NIC, the host driver points the BSM to the
5366  * "initialize" uCode image.  This uCode sets up some internal data, then
5367  * notifies host via "initialize alive" that it is complete.
5368  *
5369  * The host then replaces the BSM_DRAM_* pointer values to point to the
5370  * normal runtime uCode instructions and a backup uCode data cache buffer
5371  * (filled initially with starting data values for the on-board processor),
5372  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5373  * which begins normal operation.
5374  *
5375  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5376  * the backup data cache in DRAM before SRAM is powered down.
5377  *
5378  * When powering back up, the BSM loads the bootstrap program.  This reloads
5379  * the runtime uCode instructions and the backup data cache into SRAM,
5380  * and re-launches the runtime uCode from where it left off.
5381  */
5382 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5383 {
5384         __le32 *image = priv->ucode_boot.v_addr;
5385         u32 len = priv->ucode_boot.len;
5386         dma_addr_t pinst;
5387         dma_addr_t pdata;
5388         u32 inst_len;
5389         u32 data_len;
5390         int rc;
5391         int i;
5392         u32 done;
5393         u32 reg_offset;
5394
5395         IWL_DEBUG_INFO("Begin load bsm\n");
5396
5397         /* make sure bootstrap program is no larger than BSM's SRAM size */
5398         if (len > IWL_MAX_BSM_SIZE)
5399                 return -EINVAL;
5400
5401         /* Tell bootstrap uCode where to find the "Initialize" uCode
5402          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5403          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5404          *        after the "initialize" uCode has run, to point to
5405          *        runtime/protocol instructions and backup data cache. */
5406         pinst = priv->ucode_init.p_addr;
5407         pdata = priv->ucode_init_data.p_addr;
5408         inst_len = priv->ucode_init.len;
5409         data_len = priv->ucode_init_data.len;
5410
5411         rc = iwl3945_grab_nic_access(priv);
5412         if (rc)
5413                 return rc;
5414
5415         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5416         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5417         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5418         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5419
5420         /* Fill BSM memory with bootstrap instructions */
5421         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5422              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5423              reg_offset += sizeof(u32), image++)
5424                 _iwl3945_write_prph(priv, reg_offset,
5425                                           le32_to_cpu(*image));
5426
5427         rc = iwl3945_verify_bsm(priv);
5428         if (rc) {
5429                 iwl3945_release_nic_access(priv);
5430                 return rc;
5431         }
5432
5433         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5434         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5435         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5436                                  RTC_INST_LOWER_BOUND);
5437         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5438
5439         /* Load bootstrap code into instruction SRAM now,
5440          *   to prepare to load "initialize" uCode */
5441         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5442                 BSM_WR_CTRL_REG_BIT_START);
5443
5444         /* Wait for load of bootstrap uCode to finish */
5445         for (i = 0; i < 100; i++) {
5446                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5447                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5448                         break;
5449                 udelay(10);
5450         }
5451         if (i < 100)
5452                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5453         else {
5454                 IWL_ERROR("BSM write did not complete!\n");
5455                 return -EIO;
5456         }
5457
5458         /* Enable future boot loads whenever power management unit triggers it
5459          *   (e.g. when powering back up after power-save shutdown) */
5460         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5461                 BSM_WR_CTRL_REG_BIT_START_EN);
5462
5463         iwl3945_release_nic_access(priv);
5464
5465         return 0;
5466 }
5467
5468 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5469 {
5470         /* Remove all resets to allow NIC to operate */
5471         iwl3945_write32(priv, CSR_RESET, 0);
5472 }
5473
5474 /**
5475  * iwl3945_read_ucode - Read uCode images from disk file.
5476  *
5477  * Copy into buffers for card to fetch via bus-mastering
5478  */
5479 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5480 {
5481         struct iwl3945_ucode *ucode;
5482         int ret = 0;
5483         const struct firmware *ucode_raw;
5484         /* firmware file name contains uCode/driver compatibility version */
5485         const char *name = priv->cfg->fw_name;
5486         u8 *src;
5487         size_t len;
5488         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5489
5490         /* Ask kernel firmware_class module to get the boot firmware off disk.
5491          * request_firmware() is synchronous, file is in memory on return. */
5492         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5493         if (ret < 0) {
5494                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5495                                 name, ret);
5496                 goto error;
5497         }
5498
5499         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5500                        name, ucode_raw->size);
5501
5502         /* Make sure that we got at least our header! */
5503         if (ucode_raw->size < sizeof(*ucode)) {
5504                 IWL_ERROR("File size way too small!\n");
5505                 ret = -EINVAL;
5506                 goto err_release;
5507         }
5508
5509         /* Data from ucode file:  header followed by uCode images */
5510         ucode = (void *)ucode_raw->data;
5511
5512         ver = le32_to_cpu(ucode->ver);
5513         inst_size = le32_to_cpu(ucode->inst_size);
5514         data_size = le32_to_cpu(ucode->data_size);
5515         init_size = le32_to_cpu(ucode->init_size);
5516         init_data_size = le32_to_cpu(ucode->init_data_size);
5517         boot_size = le32_to_cpu(ucode->boot_size);
5518
5519         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5520         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5521         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5522         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5523         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5524         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5525
5526         /* Verify size of file vs. image size info in file's header */
5527         if (ucode_raw->size < sizeof(*ucode) +
5528                 inst_size + data_size + init_size +
5529                 init_data_size + boot_size) {
5530
5531                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5532                                (int)ucode_raw->size);
5533                 ret = -EINVAL;
5534                 goto err_release;
5535         }
5536
5537         /* Verify that uCode images will fit in card's SRAM */
5538         if (inst_size > IWL_MAX_INST_SIZE) {
5539                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5540                                inst_size);
5541                 ret = -EINVAL;
5542                 goto err_release;
5543         }
5544
5545         if (data_size > IWL_MAX_DATA_SIZE) {
5546                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5547                                data_size);
5548                 ret = -EINVAL;
5549                 goto err_release;
5550         }
5551         if (init_size > IWL_MAX_INST_SIZE) {
5552                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5553                                 init_size);
5554                 ret = -EINVAL;
5555                 goto err_release;
5556         }
5557         if (init_data_size > IWL_MAX_DATA_SIZE) {
5558                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5559                                 init_data_size);
5560                 ret = -EINVAL;
5561                 goto err_release;
5562         }
5563         if (boot_size > IWL_MAX_BSM_SIZE) {
5564                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5565                                 boot_size);
5566                 ret = -EINVAL;
5567                 goto err_release;
5568         }
5569
5570         /* Allocate ucode buffers for card's bus-master loading ... */
5571
5572         /* Runtime instructions and 2 copies of data:
5573          * 1) unmodified from disk
5574          * 2) backup cache for save/restore during power-downs */
5575         priv->ucode_code.len = inst_size;
5576         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5577
5578         priv->ucode_data.len = data_size;
5579         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5580
5581         priv->ucode_data_backup.len = data_size;
5582         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5583
5584         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5585             !priv->ucode_data_backup.v_addr)
5586                 goto err_pci_alloc;
5587
5588         /* Initialization instructions and data */
5589         if (init_size && init_data_size) {
5590                 priv->ucode_init.len = init_size;
5591                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5592
5593                 priv->ucode_init_data.len = init_data_size;
5594                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5595
5596                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5597                         goto err_pci_alloc;
5598         }
5599
5600         /* Bootstrap (instructions only, no data) */
5601         if (boot_size) {
5602                 priv->ucode_boot.len = boot_size;
5603                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5604
5605                 if (!priv->ucode_boot.v_addr)
5606                         goto err_pci_alloc;
5607         }
5608
5609         /* Copy images into buffers for card's bus-master reads ... */
5610
5611         /* Runtime instructions (first block of data in file) */
5612         src = &ucode->data[0];
5613         len = priv->ucode_code.len;
5614         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5615         memcpy(priv->ucode_code.v_addr, src, len);
5616         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5617                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5618
5619         /* Runtime data (2nd block)
5620          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5621         src = &ucode->data[inst_size];
5622         len = priv->ucode_data.len;
5623         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5624         memcpy(priv->ucode_data.v_addr, src, len);
5625         memcpy(priv->ucode_data_backup.v_addr, src, len);
5626
5627         /* Initialization instructions (3rd block) */
5628         if (init_size) {
5629                 src = &ucode->data[inst_size + data_size];
5630                 len = priv->ucode_init.len;
5631                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5632                                len);
5633                 memcpy(priv->ucode_init.v_addr, src, len);
5634         }
5635
5636         /* Initialization data (4th block) */
5637         if (init_data_size) {
5638                 src = &ucode->data[inst_size + data_size + init_size];
5639                 len = priv->ucode_init_data.len;
5640                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5641                                (int)len);
5642                 memcpy(priv->ucode_init_data.v_addr, src, len);
5643         }
5644
5645         /* Bootstrap instructions (5th block) */
5646         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5647         len = priv->ucode_boot.len;
5648         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5649                        (int)len);
5650         memcpy(priv->ucode_boot.v_addr, src, len);
5651
5652         /* We have our copies now, allow OS release its copies */
5653         release_firmware(ucode_raw);
5654         return 0;
5655
5656  err_pci_alloc:
5657         IWL_ERROR("failed to allocate pci memory\n");
5658         ret = -ENOMEM;
5659         iwl3945_dealloc_ucode_pci(priv);
5660
5661  err_release:
5662         release_firmware(ucode_raw);
5663
5664  error:
5665         return ret;
5666 }
5667
5668
5669 /**
5670  * iwl3945_set_ucode_ptrs - Set uCode address location
5671  *
5672  * Tell initialization uCode where to find runtime uCode.
5673  *
5674  * BSM registers initially contain pointers to initialization uCode.
5675  * We need to replace them to load runtime uCode inst and data,
5676  * and to save runtime data when powering down.
5677  */
5678 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5679 {
5680         dma_addr_t pinst;
5681         dma_addr_t pdata;
5682         int rc = 0;
5683         unsigned long flags;
5684
5685         /* bits 31:0 for 3945 */
5686         pinst = priv->ucode_code.p_addr;
5687         pdata = priv->ucode_data_backup.p_addr;
5688
5689         spin_lock_irqsave(&priv->lock, flags);
5690         rc = iwl3945_grab_nic_access(priv);
5691         if (rc) {
5692                 spin_unlock_irqrestore(&priv->lock, flags);
5693                 return rc;
5694         }
5695
5696         /* Tell bootstrap uCode where to find image to load */
5697         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5698         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5699         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5700                                  priv->ucode_data.len);
5701
5702         /* Inst bytecount must be last to set up, bit 31 signals uCode
5703          *   that all new ptr/size info is in place */
5704         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5705                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5706
5707         iwl3945_release_nic_access(priv);
5708
5709         spin_unlock_irqrestore(&priv->lock, flags);
5710
5711         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5712
5713         return rc;
5714 }
5715
5716 /**
5717  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5718  *
5719  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5720  *
5721  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5722  */
5723 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5724 {
5725         /* Check alive response for "valid" sign from uCode */
5726         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5727                 /* We had an error bringing up the hardware, so take it
5728                  * all the way back down so we can try again */
5729                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5730                 goto restart;
5731         }
5732
5733         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5734          * This is a paranoid check, because we would not have gotten the
5735          * "initialize" alive if code weren't properly loaded.  */
5736         if (iwl3945_verify_ucode(priv)) {
5737                 /* Runtime instruction load was bad;
5738                  * take it all the way back down so we can try again */
5739                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5740                 goto restart;
5741         }
5742
5743         /* Send pointers to protocol/runtime uCode image ... init code will
5744          * load and launch runtime uCode, which will send us another "Alive"
5745          * notification. */
5746         IWL_DEBUG_INFO("Initialization Alive received.\n");
5747         if (iwl3945_set_ucode_ptrs(priv)) {
5748                 /* Runtime instruction load won't happen;
5749                  * take it all the way back down so we can try again */
5750                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5751                 goto restart;
5752         }
5753         return;
5754
5755  restart:
5756         queue_work(priv->workqueue, &priv->restart);
5757 }
5758
5759
5760 /**
5761  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5762  *                   from protocol/runtime uCode (initialization uCode's
5763  *                   Alive gets handled by iwl3945_init_alive_start()).
5764  */
5765 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5766 {
5767         int rc = 0;
5768         int thermal_spin = 0;
5769         u32 rfkill;
5770
5771         IWL_DEBUG_INFO("Runtime Alive received.\n");
5772
5773         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5774                 /* We had an error bringing up the hardware, so take it
5775                  * all the way back down so we can try again */
5776                 IWL_DEBUG_INFO("Alive failed.\n");
5777                 goto restart;
5778         }
5779
5780         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5781          * This is a paranoid check, because we would not have gotten the
5782          * "runtime" alive if code weren't properly loaded.  */
5783         if (iwl3945_verify_ucode(priv)) {
5784                 /* Runtime instruction load was bad;
5785                  * take it all the way back down so we can try again */
5786                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5787                 goto restart;
5788         }
5789
5790         iwl3945_clear_stations_table(priv);
5791
5792         rc = iwl3945_grab_nic_access(priv);
5793         if (rc) {
5794                 IWL_WARNING("Can not read rfkill status from adapter\n");
5795                 return;
5796         }
5797
5798         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5799         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5800         iwl3945_release_nic_access(priv);
5801
5802         if (rfkill & 0x1) {
5803                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5804                 /* if rfkill is not on, then wait for thermal
5805                  * sensor in adapter to kick in */
5806                 while (iwl3945_hw_get_temperature(priv) == 0) {
5807                         thermal_spin++;
5808                         udelay(10);
5809                 }
5810
5811                 if (thermal_spin)
5812                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5813                                        thermal_spin * 10);
5814         } else
5815                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5816
5817         /* After the ALIVE response, we can send commands to 3945 uCode */
5818         set_bit(STATUS_ALIVE, &priv->status);
5819
5820         /* Clear out the uCode error bit if it is set */
5821         clear_bit(STATUS_FW_ERROR, &priv->status);
5822
5823         if (iwl3945_is_rfkill(priv))
5824                 return;
5825
5826         ieee80211_wake_queues(priv->hw);
5827
5828         priv->active_rate = priv->rates_mask;
5829         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5830
5831         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5832
5833         if (iwl3945_is_associated(priv)) {
5834                 struct iwl3945_rxon_cmd *active_rxon =
5835                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5836
5837                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5838                        sizeof(priv->staging_rxon));
5839                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5840         } else {
5841                 /* Initialize our rx_config data */
5842                 iwl3945_connection_init_rx_config(priv);
5843                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5844         }
5845
5846         /* Configure Bluetooth device coexistence support */
5847         iwl3945_send_bt_config(priv);
5848
5849         /* Configure the adapter for unassociated operation */
5850         iwl3945_commit_rxon(priv);
5851
5852         /* At this point, the NIC is initialized and operational */
5853         priv->notif_missed_beacons = 0;
5854
5855         iwl3945_reg_txpower_periodic(priv);
5856
5857         iwl3945_led_register(priv);
5858
5859         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5860         set_bit(STATUS_READY, &priv->status);
5861         wake_up_interruptible(&priv->wait_command_queue);
5862
5863         if (priv->error_recovering)
5864                 iwl3945_error_recovery(priv);
5865
5866         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5867         return;
5868
5869  restart:
5870         queue_work(priv->workqueue, &priv->restart);
5871 }
5872
5873 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5874
5875 static void __iwl3945_down(struct iwl3945_priv *priv)
5876 {
5877         unsigned long flags;
5878         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5879         struct ieee80211_conf *conf = NULL;
5880
5881         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5882
5883         conf = ieee80211_get_hw_conf(priv->hw);
5884
5885         if (!exit_pending)
5886                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5887
5888         iwl3945_led_unregister(priv);
5889         iwl3945_clear_stations_table(priv);
5890
5891         /* Unblock any waiting calls */
5892         wake_up_interruptible_all(&priv->wait_command_queue);
5893
5894         /* Wipe out the EXIT_PENDING status bit if we are not actually
5895          * exiting the module */
5896         if (!exit_pending)
5897                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5898
5899         /* stop and reset the on-board processor */
5900         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5901
5902         /* tell the device to stop sending interrupts */
5903         spin_lock_irqsave(&priv->lock, flags);
5904         iwl3945_disable_interrupts(priv);
5905         spin_unlock_irqrestore(&priv->lock, flags);
5906         iwl_synchronize_irq(priv);
5907
5908         if (priv->mac80211_registered)
5909                 ieee80211_stop_queues(priv->hw);
5910
5911         /* If we have not previously called iwl3945_init() then
5912          * clear all bits but the RF Kill and SUSPEND bits and return */
5913         if (!iwl3945_is_init(priv)) {
5914                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5915                                         STATUS_RF_KILL_HW |
5916                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5917                                         STATUS_RF_KILL_SW |
5918                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5919                                         STATUS_GEO_CONFIGURED |
5920                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5921                                         STATUS_IN_SUSPEND;
5922                 goto exit;
5923         }
5924
5925         /* ...otherwise clear out all the status bits but the RF Kill and
5926          * SUSPEND bits and continue taking the NIC down. */
5927         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5928                                 STATUS_RF_KILL_HW |
5929                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5930                                 STATUS_RF_KILL_SW |
5931                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5932                                 STATUS_GEO_CONFIGURED |
5933                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5934                                 STATUS_IN_SUSPEND |
5935                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5936                                 STATUS_FW_ERROR;
5937
5938         spin_lock_irqsave(&priv->lock, flags);
5939         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5940         spin_unlock_irqrestore(&priv->lock, flags);
5941
5942         iwl3945_hw_txq_ctx_stop(priv);
5943         iwl3945_hw_rxq_stop(priv);
5944
5945         spin_lock_irqsave(&priv->lock, flags);
5946         if (!iwl3945_grab_nic_access(priv)) {
5947                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5948                                          APMG_CLK_VAL_DMA_CLK_RQT);
5949                 iwl3945_release_nic_access(priv);
5950         }
5951         spin_unlock_irqrestore(&priv->lock, flags);
5952
5953         udelay(5);
5954
5955         iwl3945_hw_nic_stop_master(priv);
5956         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5957         iwl3945_hw_nic_reset(priv);
5958
5959  exit:
5960         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5961
5962         if (priv->ibss_beacon)
5963                 dev_kfree_skb(priv->ibss_beacon);
5964         priv->ibss_beacon = NULL;
5965
5966         /* clear out any free frames */
5967         iwl3945_clear_free_frames(priv);
5968 }
5969
5970 static void iwl3945_down(struct iwl3945_priv *priv)
5971 {
5972         mutex_lock(&priv->mutex);
5973         __iwl3945_down(priv);
5974         mutex_unlock(&priv->mutex);
5975
5976         iwl3945_cancel_deferred_work(priv);
5977 }
5978
5979 #define MAX_HW_RESTARTS 5
5980
5981 static int __iwl3945_up(struct iwl3945_priv *priv)
5982 {
5983         int rc, i;
5984
5985         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5986                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5987                 return -EIO;
5988         }
5989
5990         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5991                 IWL_WARNING("Radio disabled by SW RF kill (module "
5992                             "parameter)\n");
5993                 return -ENODEV;
5994         }
5995
5996         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5997                 IWL_ERROR("ucode not available for device bringup\n");
5998                 return -EIO;
5999         }
6000
6001         /* If platform's RF_KILL switch is NOT set to KILL */
6002         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6003                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6004                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6005         else {
6006                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6007                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6008                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6009                         return -ENODEV;
6010                 }
6011         }
6012
6013         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6014
6015         rc = iwl3945_hw_nic_init(priv);
6016         if (rc) {
6017                 IWL_ERROR("Unable to int nic\n");
6018                 return rc;
6019         }
6020
6021         /* make sure rfkill handshake bits are cleared */
6022         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6023         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6024                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6025
6026         /* clear (again), then enable host interrupts */
6027         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6028         iwl3945_enable_interrupts(priv);
6029
6030         /* really make sure rfkill handshake bits are cleared */
6031         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6032         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6033
6034         /* Copy original ucode data image from disk into backup cache.
6035          * This will be used to initialize the on-board processor's
6036          * data SRAM for a clean start when the runtime program first loads. */
6037         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6038                priv->ucode_data.len);
6039
6040         /* We return success when we resume from suspend and rf_kill is on. */
6041         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6042                 return 0;
6043
6044         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6045
6046                 iwl3945_clear_stations_table(priv);
6047
6048                 /* load bootstrap state machine,
6049                  * load bootstrap program into processor's memory,
6050                  * prepare to load the "initialize" uCode */
6051                 rc = iwl3945_load_bsm(priv);
6052
6053                 if (rc) {
6054                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6055                         continue;
6056                 }
6057
6058                 /* start card; "initialize" will load runtime ucode */
6059                 iwl3945_nic_start(priv);
6060
6061                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6062
6063                 return 0;
6064         }
6065
6066         set_bit(STATUS_EXIT_PENDING, &priv->status);
6067         __iwl3945_down(priv);
6068
6069         /* tried to restart and config the device for as long as our
6070          * patience could withstand */
6071         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6072         return -EIO;
6073 }
6074
6075
6076 /*****************************************************************************
6077  *
6078  * Workqueue callbacks
6079  *
6080  *****************************************************************************/
6081
6082 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6083 {
6084         struct iwl3945_priv *priv =
6085             container_of(data, struct iwl3945_priv, init_alive_start.work);
6086
6087         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6088                 return;
6089
6090         mutex_lock(&priv->mutex);
6091         iwl3945_init_alive_start(priv);
6092         mutex_unlock(&priv->mutex);
6093 }
6094
6095 static void iwl3945_bg_alive_start(struct work_struct *data)
6096 {
6097         struct iwl3945_priv *priv =
6098             container_of(data, struct iwl3945_priv, alive_start.work);
6099
6100         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6101                 return;
6102
6103         mutex_lock(&priv->mutex);
6104         iwl3945_alive_start(priv);
6105         mutex_unlock(&priv->mutex);
6106 }
6107
6108 static void iwl3945_bg_rf_kill(struct work_struct *work)
6109 {
6110         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6111
6112         wake_up_interruptible(&priv->wait_command_queue);
6113
6114         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6115                 return;
6116
6117         mutex_lock(&priv->mutex);
6118
6119         if (!iwl3945_is_rfkill(priv)) {
6120                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6121                           "HW and/or SW RF Kill no longer active, restarting "
6122                           "device\n");
6123                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6124                         queue_work(priv->workqueue, &priv->restart);
6125         } else {
6126
6127                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6128                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6129                                           "disabled by SW switch\n");
6130                 else
6131                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6132                                     "Kill switch must be turned off for "
6133                                     "wireless networking to work.\n");
6134         }
6135         mutex_unlock(&priv->mutex);
6136 }
6137
6138 static void iwl3945_bg_set_monitor(struct work_struct *work)
6139 {
6140         struct iwl3945_priv *priv = container_of(work,
6141                                 struct iwl3945_priv, set_monitor);
6142
6143         IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");
6144
6145         mutex_lock(&priv->mutex);
6146
6147         if (!iwl3945_is_ready(priv))
6148                 IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
6149         else
6150                 if (iwl3945_set_mode(priv, IEEE80211_IF_TYPE_MNTR) != 0)
6151                         IWL_ERROR("iwl3945_set_mode() failed\n");
6152
6153         mutex_unlock(&priv->mutex);
6154 }
6155
6156 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6157
6158 static void iwl3945_bg_scan_check(struct work_struct *data)
6159 {
6160         struct iwl3945_priv *priv =
6161             container_of(data, struct iwl3945_priv, scan_check.work);
6162
6163         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6164                 return;
6165
6166         mutex_lock(&priv->mutex);
6167         if (test_bit(STATUS_SCANNING, &priv->status) ||
6168             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6169                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6170                           "Scan completion watchdog resetting adapter (%dms)\n",
6171                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6172
6173                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6174                         iwl3945_send_scan_abort(priv);
6175         }
6176         mutex_unlock(&priv->mutex);
6177 }
6178
6179 static void iwl3945_bg_request_scan(struct work_struct *data)
6180 {
6181         struct iwl3945_priv *priv =
6182             container_of(data, struct iwl3945_priv, request_scan);
6183         struct iwl3945_host_cmd cmd = {
6184                 .id = REPLY_SCAN_CMD,
6185                 .len = sizeof(struct iwl3945_scan_cmd),
6186                 .meta.flags = CMD_SIZE_HUGE,
6187         };
6188         int rc = 0;
6189         struct iwl3945_scan_cmd *scan;
6190         struct ieee80211_conf *conf = NULL;
6191         u8 direct_mask;
6192         enum ieee80211_band band;
6193
6194         conf = ieee80211_get_hw_conf(priv->hw);
6195
6196         mutex_lock(&priv->mutex);
6197
6198         if (!iwl3945_is_ready(priv)) {
6199                 IWL_WARNING("request scan called when driver not ready.\n");
6200                 goto done;
6201         }
6202
6203         /* Make sure the scan wasn't cancelled before this queued work
6204          * was given the chance to run... */
6205         if (!test_bit(STATUS_SCANNING, &priv->status))
6206                 goto done;
6207
6208         /* This should never be called or scheduled if there is currently
6209          * a scan active in the hardware. */
6210         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6211                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6212                                "Ignoring second request.\n");
6213                 rc = -EIO;
6214                 goto done;
6215         }
6216
6217         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6218                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6219                 goto done;
6220         }
6221
6222         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6223                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6224                 goto done;
6225         }
6226
6227         if (iwl3945_is_rfkill(priv)) {
6228                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6229                 goto done;
6230         }
6231
6232         if (!test_bit(STATUS_READY, &priv->status)) {
6233                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6234                 goto done;
6235         }
6236
6237         if (!priv->scan_bands) {
6238                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6239                 goto done;
6240         }
6241
6242         if (!priv->scan) {
6243                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6244                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6245                 if (!priv->scan) {
6246                         rc = -ENOMEM;
6247                         goto done;
6248                 }
6249         }
6250         scan = priv->scan;
6251         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6252
6253         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6254         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6255
6256         if (iwl3945_is_associated(priv)) {
6257                 u16 interval = 0;
6258                 u32 extra;
6259                 u32 suspend_time = 100;
6260                 u32 scan_suspend_time = 100;
6261                 unsigned long flags;
6262
6263                 IWL_DEBUG_INFO("Scanning while associated...\n");
6264
6265                 spin_lock_irqsave(&priv->lock, flags);
6266                 interval = priv->beacon_int;
6267                 spin_unlock_irqrestore(&priv->lock, flags);
6268
6269                 scan->suspend_time = 0;
6270                 scan->max_out_time = cpu_to_le32(200 * 1024);
6271                 if (!interval)
6272                         interval = suspend_time;
6273                 /*
6274                  * suspend time format:
6275                  *  0-19: beacon interval in usec (time before exec.)
6276                  * 20-23: 0
6277                  * 24-31: number of beacons (suspend between channels)
6278                  */
6279
6280                 extra = (suspend_time / interval) << 24;
6281                 scan_suspend_time = 0xFF0FFFFF &
6282                     (extra | ((suspend_time % interval) * 1024));
6283
6284                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6285                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6286                                scan_suspend_time, interval);
6287         }
6288
6289         /* We should add the ability for user to lock to PASSIVE ONLY */
6290         if (priv->one_direct_scan) {
6291                 IWL_DEBUG_SCAN
6292                     ("Kicking off one direct scan for '%s'\n",
6293                      iwl3945_escape_essid(priv->direct_ssid,
6294                                       priv->direct_ssid_len));
6295                 scan->direct_scan[0].id = WLAN_EID_SSID;
6296                 scan->direct_scan[0].len = priv->direct_ssid_len;
6297                 memcpy(scan->direct_scan[0].ssid,
6298                        priv->direct_ssid, priv->direct_ssid_len);
6299                 direct_mask = 1;
6300         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6301                 IWL_DEBUG_SCAN
6302                   ("Kicking off one direct scan for '%s' when not associated\n",
6303                    iwl3945_escape_essid(priv->essid, priv->essid_len));
6304                 scan->direct_scan[0].id = WLAN_EID_SSID;
6305                 scan->direct_scan[0].len = priv->essid_len;
6306                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6307                 direct_mask = 1;
6308         } else {
6309                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6310                 direct_mask = 0;
6311         }
6312
6313         /* We don't build a direct scan probe request; the uCode will do
6314          * that based on the direct_mask added to each channel entry */
6315         scan->tx_cmd.len = cpu_to_le16(
6316                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6317                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6318         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6319         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6320         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6321
6322         /* flags + rate selection */
6323
6324         switch (priv->scan_bands) {
6325         case 2:
6326                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6327                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6328                 scan->good_CRC_th = 0;
6329                 band = IEEE80211_BAND_2GHZ;
6330                 break;
6331
6332         case 1:
6333                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6334                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6335                 band = IEEE80211_BAND_5GHZ;
6336                 break;
6337
6338         default:
6339                 IWL_WARNING("Invalid scan band count\n");
6340                 goto done;
6341         }
6342
6343         /* select Rx antennas */
6344         scan->flags |= iwl3945_get_antenna_flags(priv);
6345
6346         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6347                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6348
6349         if (direct_mask)
6350                 scan->channel_count =
6351                         iwl3945_get_channels_for_scan(
6352                                 priv, band, 1, /* active */
6353                                 direct_mask,
6354                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6355         else
6356                 scan->channel_count =
6357                         iwl3945_get_channels_for_scan(
6358                                 priv, band, 0, /* passive */
6359                                 direct_mask,
6360                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6361
6362         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6363             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6364         cmd.data = scan;
6365         scan->len = cpu_to_le16(cmd.len);
6366
6367         set_bit(STATUS_SCAN_HW, &priv->status);
6368         rc = iwl3945_send_cmd_sync(priv, &cmd);
6369         if (rc)
6370                 goto done;
6371
6372         queue_delayed_work(priv->workqueue, &priv->scan_check,
6373                            IWL_SCAN_CHECK_WATCHDOG);
6374
6375         mutex_unlock(&priv->mutex);
6376         return;
6377
6378  done:
6379         /* inform mac80211 scan aborted */
6380         queue_work(priv->workqueue, &priv->scan_completed);
6381         mutex_unlock(&priv->mutex);
6382 }
6383
6384 static void iwl3945_bg_up(struct work_struct *data)
6385 {
6386         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6387
6388         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6389                 return;
6390
6391         mutex_lock(&priv->mutex);
6392         __iwl3945_up(priv);
6393         mutex_unlock(&priv->mutex);
6394 }
6395
6396 static void iwl3945_bg_restart(struct work_struct *data)
6397 {
6398         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6399
6400         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6401                 return;
6402
6403         iwl3945_down(priv);
6404         queue_work(priv->workqueue, &priv->up);
6405 }
6406
6407 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6408 {
6409         struct iwl3945_priv *priv =
6410             container_of(data, struct iwl3945_priv, rx_replenish);
6411
6412         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6413                 return;
6414
6415         mutex_lock(&priv->mutex);
6416         iwl3945_rx_replenish(priv);
6417         mutex_unlock(&priv->mutex);
6418 }
6419
6420 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6421
6422 static void iwl3945_bg_post_associate(struct work_struct *data)
6423 {
6424         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6425                                              post_associate.work);
6426
6427         int rc = 0;
6428         struct ieee80211_conf *conf = NULL;
6429         DECLARE_MAC_BUF(mac);
6430
6431         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6432                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6433                 return;
6434         }
6435
6436
6437         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6438                         priv->assoc_id,
6439                         print_mac(mac, priv->active_rxon.bssid_addr));
6440
6441         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6442                 return;
6443
6444         mutex_lock(&priv->mutex);
6445
6446         if (!priv->vif || !priv->is_open) {
6447                 mutex_unlock(&priv->mutex);
6448                 return;
6449         }
6450         iwl3945_scan_cancel_timeout(priv, 200);
6451
6452         conf = ieee80211_get_hw_conf(priv->hw);
6453
6454         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6455         iwl3945_commit_rxon(priv);
6456
6457         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6458         iwl3945_setup_rxon_timing(priv);
6459         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6460                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6461         if (rc)
6462                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6463                             "Attempting to continue.\n");
6464
6465         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6466
6467         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6468
6469         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6470                         priv->assoc_id, priv->beacon_int);
6471
6472         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6473                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6474         else
6475                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6476
6477         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6478                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6479                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6480                 else
6481                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6482
6483                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6484                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6485
6486         }
6487
6488         iwl3945_commit_rxon(priv);
6489
6490         switch (priv->iw_mode) {
6491         case IEEE80211_IF_TYPE_STA:
6492                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6493                 break;
6494
6495         case IEEE80211_IF_TYPE_IBSS:
6496
6497                 /* clear out the station table */
6498                 iwl3945_clear_stations_table(priv);
6499
6500                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6501                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6502                 iwl3945_sync_sta(priv, IWL_STA_ID,
6503                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6504                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6505                                  CMD_ASYNC);
6506                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6507                 iwl3945_send_beacon_cmd(priv);
6508
6509                 break;
6510
6511         default:
6512                  IWL_ERROR("%s Should not be called in %d mode\n",
6513                            __FUNCTION__, priv->iw_mode);
6514                 break;
6515         }
6516
6517         iwl3945_sequence_reset(priv);
6518
6519         iwl3945_activate_qos(priv, 0);
6520
6521         /* we have just associated, don't start scan too early */
6522         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6523         mutex_unlock(&priv->mutex);
6524 }
6525
6526 static void iwl3945_bg_abort_scan(struct work_struct *work)
6527 {
6528         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6529
6530         if (!iwl3945_is_ready(priv))
6531                 return;
6532
6533         mutex_lock(&priv->mutex);
6534
6535         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6536         iwl3945_send_scan_abort(priv);
6537
6538         mutex_unlock(&priv->mutex);
6539 }
6540
6541 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6542
6543 static void iwl3945_bg_scan_completed(struct work_struct *work)
6544 {
6545         struct iwl3945_priv *priv =
6546             container_of(work, struct iwl3945_priv, scan_completed);
6547
6548         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6549
6550         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6551                 return;
6552
6553         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6554                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6555
6556         ieee80211_scan_completed(priv->hw);
6557
6558         /* Since setting the TXPOWER may have been deferred while
6559          * performing the scan, fire one off */
6560         mutex_lock(&priv->mutex);
6561         iwl3945_hw_reg_send_txpower(priv);
6562         mutex_unlock(&priv->mutex);
6563 }
6564
6565 /*****************************************************************************
6566  *
6567  * mac80211 entry point functions
6568  *
6569  *****************************************************************************/
6570
6571 #define UCODE_READY_TIMEOUT     (2 * HZ)
6572
6573 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6574 {
6575         struct iwl3945_priv *priv = hw->priv;
6576         int ret;
6577
6578         IWL_DEBUG_MAC80211("enter\n");
6579
6580         if (pci_enable_device(priv->pci_dev)) {
6581                 IWL_ERROR("Fail to pci_enable_device\n");
6582                 return -ENODEV;
6583         }
6584         pci_restore_state(priv->pci_dev);
6585         pci_enable_msi(priv->pci_dev);
6586
6587         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6588                           DRV_NAME, priv);
6589         if (ret) {
6590                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6591                 goto out_disable_msi;
6592         }
6593
6594         /* we should be verifying the device is ready to be opened */
6595         mutex_lock(&priv->mutex);
6596
6597         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6598         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6599          * ucode filename and max sizes are card-specific. */
6600
6601         if (!priv->ucode_code.len) {
6602                 ret = iwl3945_read_ucode(priv);
6603                 if (ret) {
6604                         IWL_ERROR("Could not read microcode: %d\n", ret);
6605                         mutex_unlock(&priv->mutex);
6606                         goto out_release_irq;
6607                 }
6608         }
6609
6610         ret = __iwl3945_up(priv);
6611
6612         mutex_unlock(&priv->mutex);
6613
6614         if (ret)
6615                 goto out_release_irq;
6616
6617         IWL_DEBUG_INFO("Start UP work.\n");
6618
6619         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6620                 return 0;
6621
6622         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6623          * mac80211 will not be run successfully. */
6624         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6625                         test_bit(STATUS_READY, &priv->status),
6626                         UCODE_READY_TIMEOUT);
6627         if (!ret) {
6628                 if (!test_bit(STATUS_READY, &priv->status)) {
6629                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6630                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6631                         ret = -ETIMEDOUT;
6632                         goto out_release_irq;
6633                 }
6634         }
6635
6636         priv->is_open = 1;
6637         IWL_DEBUG_MAC80211("leave\n");
6638         return 0;
6639
6640 out_release_irq:
6641         free_irq(priv->pci_dev->irq, priv);
6642 out_disable_msi:
6643         pci_disable_msi(priv->pci_dev);
6644         pci_disable_device(priv->pci_dev);
6645         priv->is_open = 0;
6646         IWL_DEBUG_MAC80211("leave - failed\n");
6647         return ret;
6648 }
6649
6650 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6651 {
6652         struct iwl3945_priv *priv = hw->priv;
6653
6654         IWL_DEBUG_MAC80211("enter\n");
6655
6656         if (!priv->is_open) {
6657                 IWL_DEBUG_MAC80211("leave - skip\n");
6658                 return;
6659         }
6660
6661         priv->is_open = 0;
6662
6663         if (iwl3945_is_ready_rf(priv)) {
6664                 /* stop mac, cancel any scan request and clear
6665                  * RXON_FILTER_ASSOC_MSK BIT
6666                  */
6667                 mutex_lock(&priv->mutex);
6668                 iwl3945_scan_cancel_timeout(priv, 100);
6669                 cancel_delayed_work(&priv->post_associate);
6670                 mutex_unlock(&priv->mutex);
6671         }
6672
6673         iwl3945_down(priv);
6674
6675         flush_workqueue(priv->workqueue);
6676         free_irq(priv->pci_dev->irq, priv);
6677         pci_disable_msi(priv->pci_dev);
6678         pci_save_state(priv->pci_dev);
6679         pci_disable_device(priv->pci_dev);
6680
6681         IWL_DEBUG_MAC80211("leave\n");
6682 }
6683
6684 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6685                       struct ieee80211_tx_control *ctl)
6686 {
6687         struct iwl3945_priv *priv = hw->priv;
6688
6689         IWL_DEBUG_MAC80211("enter\n");
6690
6691         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6692                 IWL_DEBUG_MAC80211("leave - monitor\n");
6693                 return -1;
6694         }
6695
6696         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6697                      ieee80211_get_tx_rate(hw, ctl)->bitrate);
6698
6699         if (iwl3945_tx_skb(priv, skb, ctl))
6700                 dev_kfree_skb_any(skb);
6701
6702         IWL_DEBUG_MAC80211("leave\n");
6703         return 0;
6704 }
6705
6706 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6707                                  struct ieee80211_if_init_conf *conf)
6708 {
6709         struct iwl3945_priv *priv = hw->priv;
6710         unsigned long flags;
6711         DECLARE_MAC_BUF(mac);
6712
6713         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6714
6715         if (priv->vif) {
6716                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6717                 return -EOPNOTSUPP;
6718         }
6719
6720         spin_lock_irqsave(&priv->lock, flags);
6721         priv->vif = conf->vif;
6722
6723         spin_unlock_irqrestore(&priv->lock, flags);
6724
6725         mutex_lock(&priv->mutex);
6726
6727         if (conf->mac_addr) {
6728                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6729                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6730         }
6731
6732         if (iwl3945_is_ready(priv))
6733                 iwl3945_set_mode(priv, conf->type);
6734
6735         mutex_unlock(&priv->mutex);
6736
6737         IWL_DEBUG_MAC80211("leave\n");
6738         return 0;
6739 }
6740
6741 /**
6742  * iwl3945_mac_config - mac80211 config callback
6743  *
6744  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6745  * be set inappropriately and the driver currently sets the hardware up to
6746  * use it whenever needed.
6747  */
6748 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6749 {
6750         struct iwl3945_priv *priv = hw->priv;
6751         const struct iwl3945_channel_info *ch_info;
6752         unsigned long flags;
6753         int ret = 0;
6754
6755         mutex_lock(&priv->mutex);
6756         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6757
6758         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6759
6760         if (!iwl3945_is_ready(priv)) {
6761                 IWL_DEBUG_MAC80211("leave - not ready\n");
6762                 ret = -EIO;
6763                 goto out;
6764         }
6765
6766         if (unlikely(!iwl3945_param_disable_hw_scan &&
6767                      test_bit(STATUS_SCANNING, &priv->status))) {
6768                 IWL_DEBUG_MAC80211("leave - scanning\n");
6769                 set_bit(STATUS_CONF_PENDING, &priv->status);
6770                 mutex_unlock(&priv->mutex);
6771                 return 0;
6772         }
6773
6774         spin_lock_irqsave(&priv->lock, flags);
6775
6776         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6777                                            conf->channel->hw_value);
6778         if (!is_channel_valid(ch_info)) {
6779                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6780                                conf->channel->hw_value, conf->channel->band);
6781                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6782                 spin_unlock_irqrestore(&priv->lock, flags);
6783                 ret = -EINVAL;
6784                 goto out;
6785         }
6786
6787         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6788
6789         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6790
6791         /* The list of supported rates and rate mask can be different
6792          * for each phymode; since the phymode may have changed, reset
6793          * the rate mask to what mac80211 lists */
6794         iwl3945_set_rate(priv);
6795
6796         spin_unlock_irqrestore(&priv->lock, flags);
6797
6798 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6799         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6800                 iwl3945_hw_channel_switch(priv, conf->channel);
6801                 goto out;
6802         }
6803 #endif
6804
6805         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6806
6807         if (!conf->radio_enabled) {
6808                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6809                 goto out;
6810         }
6811
6812         if (iwl3945_is_rfkill(priv)) {
6813                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6814                 ret = -EIO;
6815                 goto out;
6816         }
6817
6818         iwl3945_set_rate(priv);
6819
6820         if (memcmp(&priv->active_rxon,
6821                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6822                 iwl3945_commit_rxon(priv);
6823         else
6824                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6825
6826         IWL_DEBUG_MAC80211("leave\n");
6827
6828 out:
6829         clear_bit(STATUS_CONF_PENDING, &priv->status);
6830         mutex_unlock(&priv->mutex);
6831         return ret;
6832 }
6833
6834 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6835 {
6836         int rc = 0;
6837
6838         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6839                 return;
6840
6841         /* The following should be done only at AP bring up */
6842         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6843
6844                 /* RXON - unassoc (to set timing command) */
6845                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6846                 iwl3945_commit_rxon(priv);
6847
6848                 /* RXON Timing */
6849                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6850                 iwl3945_setup_rxon_timing(priv);
6851                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6852                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6853                 if (rc)
6854                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6855                                         "Attempting to continue.\n");
6856
6857                 /* FIXME: what should be the assoc_id for AP? */
6858                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6859                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6860                         priv->staging_rxon.flags |=
6861                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6862                 else
6863                         priv->staging_rxon.flags &=
6864                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6865
6866                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6867                         if (priv->assoc_capability &
6868                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6869                                 priv->staging_rxon.flags |=
6870                                         RXON_FLG_SHORT_SLOT_MSK;
6871                         else
6872                                 priv->staging_rxon.flags &=
6873                                         ~RXON_FLG_SHORT_SLOT_MSK;
6874
6875                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6876                                 priv->staging_rxon.flags &=
6877                                         ~RXON_FLG_SHORT_SLOT_MSK;
6878                 }
6879                 /* restore RXON assoc */
6880                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6881                 iwl3945_commit_rxon(priv);
6882                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6883         }
6884         iwl3945_send_beacon_cmd(priv);
6885
6886         /* FIXME - we need to add code here to detect a totally new
6887          * configuration, reset the AP, unassoc, rxon timing, assoc,
6888          * clear sta table, add BCAST sta... */
6889 }
6890
6891 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6892                                         struct ieee80211_vif *vif,
6893                                     struct ieee80211_if_conf *conf)
6894 {
6895         struct iwl3945_priv *priv = hw->priv;
6896         DECLARE_MAC_BUF(mac);
6897         unsigned long flags;
6898         int rc;
6899
6900         if (conf == NULL)
6901                 return -EIO;
6902
6903         if (priv->vif != vif) {
6904                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6905                 return 0;
6906         }
6907
6908         /* XXX: this MUST use conf->mac_addr */
6909
6910         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6911             (!conf->beacon || !conf->ssid_len)) {
6912                 IWL_DEBUG_MAC80211
6913                     ("Leaving in AP mode because HostAPD is not ready.\n");
6914                 return 0;
6915         }
6916
6917         if (!iwl3945_is_alive(priv))
6918                 return -EAGAIN;
6919
6920         mutex_lock(&priv->mutex);
6921
6922         if (conf->bssid)
6923                 IWL_DEBUG_MAC80211("bssid: %s\n",
6924                                    print_mac(mac, conf->bssid));
6925
6926 /*
6927  * very dubious code was here; the probe filtering flag is never set:
6928  *
6929         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6930             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6931  */
6932
6933         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6934                 if (!conf->bssid) {
6935                         conf->bssid = priv->mac_addr;
6936                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6937                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6938                                            print_mac(mac, conf->bssid));
6939                 }
6940                 if (priv->ibss_beacon)
6941                         dev_kfree_skb(priv->ibss_beacon);
6942
6943                 priv->ibss_beacon = conf->beacon;
6944         }
6945
6946         if (iwl3945_is_rfkill(priv))
6947                 goto done;
6948
6949         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6950             !is_multicast_ether_addr(conf->bssid)) {
6951                 /* If there is currently a HW scan going on in the background
6952                  * then we need to cancel it else the RXON below will fail. */
6953                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6954                         IWL_WARNING("Aborted scan still in progress "
6955                                     "after 100ms\n");
6956                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6957                         mutex_unlock(&priv->mutex);
6958                         return -EAGAIN;
6959                 }
6960                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6961
6962                 /* TODO: Audit driver for usage of these members and see
6963                  * if mac80211 deprecates them (priv->bssid looks like it
6964                  * shouldn't be there, but I haven't scanned the IBSS code
6965                  * to verify) - jpk */
6966                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6967
6968                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6969                         iwl3945_config_ap(priv);
6970                 else {
6971                         rc = iwl3945_commit_rxon(priv);
6972                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6973                                 iwl3945_add_station(priv,
6974                                         priv->active_rxon.bssid_addr, 1, 0);
6975                 }
6976
6977         } else {
6978                 iwl3945_scan_cancel_timeout(priv, 100);
6979                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6980                 iwl3945_commit_rxon(priv);
6981         }
6982
6983  done:
6984         spin_lock_irqsave(&priv->lock, flags);
6985         if (!conf->ssid_len)
6986                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6987         else
6988                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6989
6990         priv->essid_len = conf->ssid_len;
6991         spin_unlock_irqrestore(&priv->lock, flags);
6992
6993         IWL_DEBUG_MAC80211("leave\n");
6994         mutex_unlock(&priv->mutex);
6995
6996         return 0;
6997 }
6998
6999 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
7000                                  unsigned int changed_flags,
7001                                  unsigned int *total_flags,
7002                                  int mc_count, struct dev_addr_list *mc_list)
7003 {
7004         /*
7005          * XXX: dummy
7006          * see also iwl3945_connection_init_rx_config
7007          */
7008         struct iwl3945_priv *priv = hw->priv;
7009         int new_flags = 0;
7010         if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
7011                 if (*total_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
7012                         IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
7013                                            IEEE80211_IF_TYPE_MNTR,
7014                                            changed_flags, *total_flags);
7015                         /* queue work 'cuz mac80211 is holding a lock which
7016                          * prevents us from issuing (synchronous) f/w cmds */
7017                         queue_work(priv->workqueue, &priv->set_monitor);
7018                         new_flags &= FIF_PROMISC_IN_BSS |
7019                                      FIF_OTHER_BSS |
7020                                      FIF_ALLMULTI;
7021                 }
7022         }
7023         *total_flags = new_flags;
7024 }
7025
7026 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7027                                      struct ieee80211_if_init_conf *conf)
7028 {
7029         struct iwl3945_priv *priv = hw->priv;
7030
7031         IWL_DEBUG_MAC80211("enter\n");
7032
7033         mutex_lock(&priv->mutex);
7034
7035         if (iwl3945_is_ready_rf(priv)) {
7036                 iwl3945_scan_cancel_timeout(priv, 100);
7037                 cancel_delayed_work(&priv->post_associate);
7038                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7039                 iwl3945_commit_rxon(priv);
7040         }
7041         if (priv->vif == conf->vif) {
7042                 priv->vif = NULL;
7043                 memset(priv->bssid, 0, ETH_ALEN);
7044                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7045                 priv->essid_len = 0;
7046         }
7047         mutex_unlock(&priv->mutex);
7048
7049         IWL_DEBUG_MAC80211("leave\n");
7050 }
7051
7052 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7053 {
7054         int rc = 0;
7055         unsigned long flags;
7056         struct iwl3945_priv *priv = hw->priv;
7057
7058         IWL_DEBUG_MAC80211("enter\n");
7059
7060         mutex_lock(&priv->mutex);
7061         spin_lock_irqsave(&priv->lock, flags);
7062
7063         if (!iwl3945_is_ready_rf(priv)) {
7064                 rc = -EIO;
7065                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7066                 goto out_unlock;
7067         }
7068
7069         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7070                 rc = -EIO;
7071                 IWL_ERROR("ERROR: APs don't scan\n");
7072                 goto out_unlock;
7073         }
7074
7075         /* we don't schedule scan within next_scan_jiffies period */
7076         if (priv->next_scan_jiffies &&
7077                         time_after(priv->next_scan_jiffies, jiffies)) {
7078                 rc = -EAGAIN;
7079                 goto out_unlock;
7080         }
7081         /* if we just finished scan ask for delay for a broadcast scan */
7082         if ((len == 0) && priv->last_scan_jiffies &&
7083             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7084                        jiffies)) {
7085                 rc = -EAGAIN;
7086                 goto out_unlock;
7087         }
7088         if (len) {
7089                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7090                                iwl3945_escape_essid(ssid, len), (int)len);
7091
7092                 priv->one_direct_scan = 1;
7093                 priv->direct_ssid_len = (u8)
7094                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7095                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7096         } else
7097                 priv->one_direct_scan = 0;
7098
7099         rc = iwl3945_scan_initiate(priv);
7100
7101         IWL_DEBUG_MAC80211("leave\n");
7102
7103 out_unlock:
7104         spin_unlock_irqrestore(&priv->lock, flags);
7105         mutex_unlock(&priv->mutex);
7106
7107         return rc;
7108 }
7109
7110 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7111                            const u8 *local_addr, const u8 *addr,
7112                            struct ieee80211_key_conf *key)
7113 {
7114         struct iwl3945_priv *priv = hw->priv;
7115         int rc = 0;
7116         u8 sta_id;
7117
7118         IWL_DEBUG_MAC80211("enter\n");
7119
7120         if (!iwl3945_param_hwcrypto) {
7121                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7122                 return -EOPNOTSUPP;
7123         }
7124
7125         if (is_zero_ether_addr(addr))
7126                 /* only support pairwise keys */
7127                 return -EOPNOTSUPP;
7128
7129         sta_id = iwl3945_hw_find_station(priv, addr);
7130         if (sta_id == IWL_INVALID_STATION) {
7131                 DECLARE_MAC_BUF(mac);
7132
7133                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7134                                    print_mac(mac, addr));
7135                 return -EINVAL;
7136         }
7137
7138         mutex_lock(&priv->mutex);
7139
7140         iwl3945_scan_cancel_timeout(priv, 100);
7141
7142         switch (cmd) {
7143         case  SET_KEY:
7144                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7145                 if (!rc) {
7146                         iwl3945_set_rxon_hwcrypto(priv, 1);
7147                         iwl3945_commit_rxon(priv);
7148                         key->hw_key_idx = sta_id;
7149                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7150                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7151                 }
7152                 break;
7153         case DISABLE_KEY:
7154                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7155                 if (!rc) {
7156                         iwl3945_set_rxon_hwcrypto(priv, 0);
7157                         iwl3945_commit_rxon(priv);
7158                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7159                 }
7160                 break;
7161         default:
7162                 rc = -EINVAL;
7163         }
7164
7165         IWL_DEBUG_MAC80211("leave\n");
7166         mutex_unlock(&priv->mutex);
7167
7168         return rc;
7169 }
7170
7171 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
7172                            const struct ieee80211_tx_queue_params *params)
7173 {
7174         struct iwl3945_priv *priv = hw->priv;
7175         unsigned long flags;
7176         int q;
7177
7178         IWL_DEBUG_MAC80211("enter\n");
7179
7180         if (!iwl3945_is_ready_rf(priv)) {
7181                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7182                 return -EIO;
7183         }
7184
7185         if (queue >= AC_NUM) {
7186                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7187                 return 0;
7188         }
7189
7190         if (!priv->qos_data.qos_enable) {
7191                 priv->qos_data.qos_active = 0;
7192                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7193                 return 0;
7194         }
7195         q = AC_NUM - 1 - queue;
7196
7197         spin_lock_irqsave(&priv->lock, flags);
7198
7199         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7200         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7201         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7202         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7203                         cpu_to_le16((params->txop * 32));
7204
7205         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7206         priv->qos_data.qos_active = 1;
7207
7208         spin_unlock_irqrestore(&priv->lock, flags);
7209
7210         mutex_lock(&priv->mutex);
7211         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7212                 iwl3945_activate_qos(priv, 1);
7213         else if (priv->assoc_id && iwl3945_is_associated(priv))
7214                 iwl3945_activate_qos(priv, 0);
7215
7216         mutex_unlock(&priv->mutex);
7217
7218         IWL_DEBUG_MAC80211("leave\n");
7219         return 0;
7220 }
7221
7222 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7223                                 struct ieee80211_tx_queue_stats *stats)
7224 {
7225         struct iwl3945_priv *priv = hw->priv;
7226         int i, avail;
7227         struct iwl3945_tx_queue *txq;
7228         struct iwl3945_queue *q;
7229         unsigned long flags;
7230
7231         IWL_DEBUG_MAC80211("enter\n");
7232
7233         if (!iwl3945_is_ready_rf(priv)) {
7234                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7235                 return -EIO;
7236         }
7237
7238         spin_lock_irqsave(&priv->lock, flags);
7239
7240         for (i = 0; i < AC_NUM; i++) {
7241                 txq = &priv->txq[i];
7242                 q = &txq->q;
7243                 avail = iwl3945_queue_space(q);
7244
7245                 stats[i].len = q->n_window - avail;
7246                 stats[i].limit = q->n_window - q->high_mark;
7247                 stats[i].count = q->n_window;
7248
7249         }
7250         spin_unlock_irqrestore(&priv->lock, flags);
7251
7252         IWL_DEBUG_MAC80211("leave\n");
7253
7254         return 0;
7255 }
7256
7257 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7258                              struct ieee80211_low_level_stats *stats)
7259 {
7260         IWL_DEBUG_MAC80211("enter\n");
7261         IWL_DEBUG_MAC80211("leave\n");
7262
7263         return 0;
7264 }
7265
7266 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7267 {
7268         IWL_DEBUG_MAC80211("enter\n");
7269         IWL_DEBUG_MAC80211("leave\n");
7270
7271         return 0;
7272 }
7273
7274 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7275 {
7276         struct iwl3945_priv *priv = hw->priv;
7277         unsigned long flags;
7278
7279         mutex_lock(&priv->mutex);
7280         IWL_DEBUG_MAC80211("enter\n");
7281
7282         iwl3945_reset_qos(priv);
7283
7284         cancel_delayed_work(&priv->post_associate);
7285
7286         spin_lock_irqsave(&priv->lock, flags);
7287         priv->assoc_id = 0;
7288         priv->assoc_capability = 0;
7289         priv->call_post_assoc_from_beacon = 0;
7290
7291         /* new association get rid of ibss beacon skb */
7292         if (priv->ibss_beacon)
7293                 dev_kfree_skb(priv->ibss_beacon);
7294
7295         priv->ibss_beacon = NULL;
7296
7297         priv->beacon_int = priv->hw->conf.beacon_int;
7298         priv->timestamp1 = 0;
7299         priv->timestamp0 = 0;
7300         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7301                 priv->beacon_int = 0;
7302
7303         spin_unlock_irqrestore(&priv->lock, flags);
7304
7305         if (!iwl3945_is_ready_rf(priv)) {
7306                 IWL_DEBUG_MAC80211("leave - not ready\n");
7307                 mutex_unlock(&priv->mutex);
7308                 return;
7309         }
7310
7311         /* we are restarting association process
7312          * clear RXON_FILTER_ASSOC_MSK bit
7313         */
7314         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7315                 iwl3945_scan_cancel_timeout(priv, 100);
7316                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7317                 iwl3945_commit_rxon(priv);
7318         }
7319
7320         /* Per mac80211.h: This is only used in IBSS mode... */
7321         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7322
7323                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7324                 mutex_unlock(&priv->mutex);
7325                 return;
7326         }
7327
7328         iwl3945_set_rate(priv);
7329
7330         mutex_unlock(&priv->mutex);
7331
7332         IWL_DEBUG_MAC80211("leave\n");
7333
7334 }
7335
7336 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7337                                  struct ieee80211_tx_control *control)
7338 {
7339         struct iwl3945_priv *priv = hw->priv;
7340         unsigned long flags;
7341
7342         mutex_lock(&priv->mutex);
7343         IWL_DEBUG_MAC80211("enter\n");
7344
7345         if (!iwl3945_is_ready_rf(priv)) {
7346                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7347                 mutex_unlock(&priv->mutex);
7348                 return -EIO;
7349         }
7350
7351         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7352                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7353                 mutex_unlock(&priv->mutex);
7354                 return -EIO;
7355         }
7356
7357         spin_lock_irqsave(&priv->lock, flags);
7358
7359         if (priv->ibss_beacon)
7360                 dev_kfree_skb(priv->ibss_beacon);
7361
7362         priv->ibss_beacon = skb;
7363
7364         priv->assoc_id = 0;
7365
7366         IWL_DEBUG_MAC80211("leave\n");
7367         spin_unlock_irqrestore(&priv->lock, flags);
7368
7369         iwl3945_reset_qos(priv);
7370
7371         queue_work(priv->workqueue, &priv->post_associate.work);
7372
7373         mutex_unlock(&priv->mutex);
7374
7375         return 0;
7376 }
7377
7378 /*****************************************************************************
7379  *
7380  * sysfs attributes
7381  *
7382  *****************************************************************************/
7383
7384 #ifdef CONFIG_IWL3945_DEBUG
7385
7386 /*
7387  * The following adds a new attribute to the sysfs representation
7388  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7389  * used for controlling the debug level.
7390  *
7391  * See the level definitions in iwl for details.
7392  */
7393
7394 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7395 {
7396         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7397 }
7398 static ssize_t store_debug_level(struct device_driver *d,
7399                                  const char *buf, size_t count)
7400 {
7401         char *p = (char *)buf;
7402         u32 val;
7403
7404         val = simple_strtoul(p, &p, 0);
7405         if (p == buf)
7406                 printk(KERN_INFO DRV_NAME
7407                        ": %s is not in hex or decimal form.\n", buf);
7408         else
7409                 iwl3945_debug_level = val;
7410
7411         return strnlen(buf, count);
7412 }
7413
7414 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7415                    show_debug_level, store_debug_level);
7416
7417 #endif /* CONFIG_IWL3945_DEBUG */
7418
7419 static ssize_t show_rf_kill(struct device *d,
7420                             struct device_attribute *attr, char *buf)
7421 {
7422         /*
7423          * 0 - RF kill not enabled
7424          * 1 - SW based RF kill active (sysfs)
7425          * 2 - HW based RF kill active
7426          * 3 - Both HW and SW based RF kill active
7427          */
7428         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7429         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7430                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7431
7432         return sprintf(buf, "%i\n", val);
7433 }
7434
7435 static ssize_t store_rf_kill(struct device *d,
7436                              struct device_attribute *attr,
7437                              const char *buf, size_t count)
7438 {
7439         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7440
7441         mutex_lock(&priv->mutex);
7442         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7443         mutex_unlock(&priv->mutex);
7444
7445         return count;
7446 }
7447
7448 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7449
7450 static ssize_t show_temperature(struct device *d,
7451                                 struct device_attribute *attr, char *buf)
7452 {
7453         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7454
7455         if (!iwl3945_is_alive(priv))
7456                 return -EAGAIN;
7457
7458         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7459 }
7460
7461 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7462
7463 static ssize_t show_rs_window(struct device *d,
7464                               struct device_attribute *attr,
7465                               char *buf)
7466 {
7467         struct iwl3945_priv *priv = d->driver_data;
7468         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7469 }
7470 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7471
7472 static ssize_t show_tx_power(struct device *d,
7473                              struct device_attribute *attr, char *buf)
7474 {
7475         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7476         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7477 }
7478
7479 static ssize_t store_tx_power(struct device *d,
7480                               struct device_attribute *attr,
7481                               const char *buf, size_t count)
7482 {
7483         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7484         char *p = (char *)buf;
7485         u32 val;
7486
7487         val = simple_strtoul(p, &p, 10);
7488         if (p == buf)
7489                 printk(KERN_INFO DRV_NAME
7490                        ": %s is not in decimal form.\n", buf);
7491         else
7492                 iwl3945_hw_reg_set_txpower(priv, val);
7493
7494         return count;
7495 }
7496
7497 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7498
7499 static ssize_t show_flags(struct device *d,
7500                           struct device_attribute *attr, char *buf)
7501 {
7502         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7503
7504         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7505 }
7506
7507 static ssize_t store_flags(struct device *d,
7508                            struct device_attribute *attr,
7509                            const char *buf, size_t count)
7510 {
7511         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7512         u32 flags = simple_strtoul(buf, NULL, 0);
7513
7514         mutex_lock(&priv->mutex);
7515         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7516                 /* Cancel any currently running scans... */
7517                 if (iwl3945_scan_cancel_timeout(priv, 100))
7518                         IWL_WARNING("Could not cancel scan.\n");
7519                 else {
7520                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7521                                        flags);
7522                         priv->staging_rxon.flags = cpu_to_le32(flags);
7523                         iwl3945_commit_rxon(priv);
7524                 }
7525         }
7526         mutex_unlock(&priv->mutex);
7527
7528         return count;
7529 }
7530
7531 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7532
7533 static ssize_t show_filter_flags(struct device *d,
7534                                  struct device_attribute *attr, char *buf)
7535 {
7536         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7537
7538         return sprintf(buf, "0x%04X\n",
7539                 le32_to_cpu(priv->active_rxon.filter_flags));
7540 }
7541
7542 static ssize_t store_filter_flags(struct device *d,
7543                                   struct device_attribute *attr,
7544                                   const char *buf, size_t count)
7545 {
7546         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7547         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7548
7549         mutex_lock(&priv->mutex);
7550         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7551                 /* Cancel any currently running scans... */
7552                 if (iwl3945_scan_cancel_timeout(priv, 100))
7553                         IWL_WARNING("Could not cancel scan.\n");
7554                 else {
7555                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7556                                        "0x%04X\n", filter_flags);
7557                         priv->staging_rxon.filter_flags =
7558                                 cpu_to_le32(filter_flags);
7559                         iwl3945_commit_rxon(priv);
7560                 }
7561         }
7562         mutex_unlock(&priv->mutex);
7563
7564         return count;
7565 }
7566
7567 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7568                    store_filter_flags);
7569
7570 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7571
7572 static ssize_t show_measurement(struct device *d,
7573                                 struct device_attribute *attr, char *buf)
7574 {
7575         struct iwl3945_priv *priv = dev_get_drvdata(d);
7576         struct iwl3945_spectrum_notification measure_report;
7577         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7578         u8 *data = (u8 *) & measure_report;
7579         unsigned long flags;
7580
7581         spin_lock_irqsave(&priv->lock, flags);
7582         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7583                 spin_unlock_irqrestore(&priv->lock, flags);
7584                 return 0;
7585         }
7586         memcpy(&measure_report, &priv->measure_report, size);
7587         priv->measurement_status = 0;
7588         spin_unlock_irqrestore(&priv->lock, flags);
7589
7590         while (size && (PAGE_SIZE - len)) {
7591                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7592                                    PAGE_SIZE - len, 1);
7593                 len = strlen(buf);
7594                 if (PAGE_SIZE - len)
7595                         buf[len++] = '\n';
7596
7597                 ofs += 16;
7598                 size -= min(size, 16U);
7599         }
7600
7601         return len;
7602 }
7603
7604 static ssize_t store_measurement(struct device *d,
7605                                  struct device_attribute *attr,
7606                                  const char *buf, size_t count)
7607 {
7608         struct iwl3945_priv *priv = dev_get_drvdata(d);
7609         struct ieee80211_measurement_params params = {
7610                 .channel = le16_to_cpu(priv->active_rxon.channel),
7611                 .start_time = cpu_to_le64(priv->last_tsf),
7612                 .duration = cpu_to_le16(1),
7613         };
7614         u8 type = IWL_MEASURE_BASIC;
7615         u8 buffer[32];
7616         u8 channel;
7617
7618         if (count) {
7619                 char *p = buffer;
7620                 strncpy(buffer, buf, min(sizeof(buffer), count));
7621                 channel = simple_strtoul(p, NULL, 0);
7622                 if (channel)
7623                         params.channel = channel;
7624
7625                 p = buffer;
7626                 while (*p && *p != ' ')
7627                         p++;
7628                 if (*p)
7629                         type = simple_strtoul(p + 1, NULL, 0);
7630         }
7631
7632         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7633                        "channel %d (for '%s')\n", type, params.channel, buf);
7634         iwl3945_get_measurement(priv, &params, type);
7635
7636         return count;
7637 }
7638
7639 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7640                    show_measurement, store_measurement);
7641 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7642
7643 static ssize_t store_retry_rate(struct device *d,
7644                                 struct device_attribute *attr,
7645                                 const char *buf, size_t count)
7646 {
7647         struct iwl3945_priv *priv = dev_get_drvdata(d);
7648
7649         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7650         if (priv->retry_rate <= 0)
7651                 priv->retry_rate = 1;
7652
7653         return count;
7654 }
7655
7656 static ssize_t show_retry_rate(struct device *d,
7657                                struct device_attribute *attr, char *buf)
7658 {
7659         struct iwl3945_priv *priv = dev_get_drvdata(d);
7660         return sprintf(buf, "%d", priv->retry_rate);
7661 }
7662
7663 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7664                    store_retry_rate);
7665
7666 static ssize_t store_power_level(struct device *d,
7667                                  struct device_attribute *attr,
7668                                  const char *buf, size_t count)
7669 {
7670         struct iwl3945_priv *priv = dev_get_drvdata(d);
7671         int rc;
7672         int mode;
7673
7674         mode = simple_strtoul(buf, NULL, 0);
7675         mutex_lock(&priv->mutex);
7676
7677         if (!iwl3945_is_ready(priv)) {
7678                 rc = -EAGAIN;
7679                 goto out;
7680         }
7681
7682         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7683                 mode = IWL_POWER_AC;
7684         else
7685                 mode |= IWL_POWER_ENABLED;
7686
7687         if (mode != priv->power_mode) {
7688                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7689                 if (rc) {
7690                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7691                         goto out;
7692                 }
7693                 priv->power_mode = mode;
7694         }
7695
7696         rc = count;
7697
7698  out:
7699         mutex_unlock(&priv->mutex);
7700         return rc;
7701 }
7702
7703 #define MAX_WX_STRING 80
7704
7705 /* Values are in microsecond */
7706 static const s32 timeout_duration[] = {
7707         350000,
7708         250000,
7709         75000,
7710         37000,
7711         25000,
7712 };
7713 static const s32 period_duration[] = {
7714         400000,
7715         700000,
7716         1000000,
7717         1000000,
7718         1000000
7719 };
7720
7721 static ssize_t show_power_level(struct device *d,
7722                                 struct device_attribute *attr, char *buf)
7723 {
7724         struct iwl3945_priv *priv = dev_get_drvdata(d);
7725         int level = IWL_POWER_LEVEL(priv->power_mode);
7726         char *p = buf;
7727
7728         p += sprintf(p, "%d ", level);
7729         switch (level) {
7730         case IWL_POWER_MODE_CAM:
7731         case IWL_POWER_AC:
7732                 p += sprintf(p, "(AC)");
7733                 break;
7734         case IWL_POWER_BATTERY:
7735                 p += sprintf(p, "(BATTERY)");
7736                 break;
7737         default:
7738                 p += sprintf(p,
7739                              "(Timeout %dms, Period %dms)",
7740                              timeout_duration[level - 1] / 1000,
7741                              period_duration[level - 1] / 1000);
7742         }
7743
7744         if (!(priv->power_mode & IWL_POWER_ENABLED))
7745                 p += sprintf(p, " OFF\n");
7746         else
7747                 p += sprintf(p, " \n");
7748
7749         return (p - buf + 1);
7750
7751 }
7752
7753 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7754                    store_power_level);
7755
7756 static ssize_t show_channels(struct device *d,
7757                              struct device_attribute *attr, char *buf)
7758 {
7759         /* all this shit doesn't belong into sysfs anyway */
7760         return 0;
7761 }
7762
7763 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7764
7765 static ssize_t show_statistics(struct device *d,
7766                                struct device_attribute *attr, char *buf)
7767 {
7768         struct iwl3945_priv *priv = dev_get_drvdata(d);
7769         u32 size = sizeof(struct iwl3945_notif_statistics);
7770         u32 len = 0, ofs = 0;
7771         u8 *data = (u8 *) & priv->statistics;
7772         int rc = 0;
7773
7774         if (!iwl3945_is_alive(priv))
7775                 return -EAGAIN;
7776
7777         mutex_lock(&priv->mutex);
7778         rc = iwl3945_send_statistics_request(priv);
7779         mutex_unlock(&priv->mutex);
7780
7781         if (rc) {
7782                 len = sprintf(buf,
7783                               "Error sending statistics request: 0x%08X\n", rc);
7784                 return len;
7785         }
7786
7787         while (size && (PAGE_SIZE - len)) {
7788                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7789                                    PAGE_SIZE - len, 1);
7790                 len = strlen(buf);
7791                 if (PAGE_SIZE - len)
7792                         buf[len++] = '\n';
7793
7794                 ofs += 16;
7795                 size -= min(size, 16U);
7796         }
7797
7798         return len;
7799 }
7800
7801 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7802
7803 static ssize_t show_antenna(struct device *d,
7804                             struct device_attribute *attr, char *buf)
7805 {
7806         struct iwl3945_priv *priv = dev_get_drvdata(d);
7807
7808         if (!iwl3945_is_alive(priv))
7809                 return -EAGAIN;
7810
7811         return sprintf(buf, "%d\n", priv->antenna);
7812 }
7813
7814 static ssize_t store_antenna(struct device *d,
7815                              struct device_attribute *attr,
7816                              const char *buf, size_t count)
7817 {
7818         int ant;
7819         struct iwl3945_priv *priv = dev_get_drvdata(d);
7820
7821         if (count == 0)
7822                 return 0;
7823
7824         if (sscanf(buf, "%1i", &ant) != 1) {
7825                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7826                 return count;
7827         }
7828
7829         if ((ant >= 0) && (ant <= 2)) {
7830                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7831                 priv->antenna = (enum iwl3945_antenna)ant;
7832         } else
7833                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7834
7835
7836         return count;
7837 }
7838
7839 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7840
7841 static ssize_t show_status(struct device *d,
7842                            struct device_attribute *attr, char *buf)
7843 {
7844         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7845         if (!iwl3945_is_alive(priv))
7846                 return -EAGAIN;
7847         return sprintf(buf, "0x%08x\n", (int)priv->status);
7848 }
7849
7850 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7851
7852 static ssize_t dump_error_log(struct device *d,
7853                               struct device_attribute *attr,
7854                               const char *buf, size_t count)
7855 {
7856         char *p = (char *)buf;
7857
7858         if (p[0] == '1')
7859                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7860
7861         return strnlen(buf, count);
7862 }
7863
7864 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7865
7866 static ssize_t dump_event_log(struct device *d,
7867                               struct device_attribute *attr,
7868                               const char *buf, size_t count)
7869 {
7870         char *p = (char *)buf;
7871
7872         if (p[0] == '1')
7873                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7874
7875         return strnlen(buf, count);
7876 }
7877
7878 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7879
7880 /*****************************************************************************
7881  *
7882  * driver setup and teardown
7883  *
7884  *****************************************************************************/
7885
7886 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7887 {
7888         priv->workqueue = create_workqueue(DRV_NAME);
7889
7890         init_waitqueue_head(&priv->wait_command_queue);
7891
7892         INIT_WORK(&priv->up, iwl3945_bg_up);
7893         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7894         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7895         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7896         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7897         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7898         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7899         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7900         INIT_WORK(&priv->set_monitor, iwl3945_bg_set_monitor);
7901         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
7902         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7903         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7904         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7905
7906         iwl3945_hw_setup_deferred_work(priv);
7907
7908         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7909                      iwl3945_irq_tasklet, (unsigned long)priv);
7910 }
7911
7912 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7913 {
7914         iwl3945_hw_cancel_deferred_work(priv);
7915
7916         cancel_delayed_work_sync(&priv->init_alive_start);
7917         cancel_delayed_work(&priv->scan_check);
7918         cancel_delayed_work(&priv->alive_start);
7919         cancel_delayed_work(&priv->post_associate);
7920         cancel_work_sync(&priv->beacon_update);
7921 }
7922
7923 static struct attribute *iwl3945_sysfs_entries[] = {
7924         &dev_attr_antenna.attr,
7925         &dev_attr_channels.attr,
7926         &dev_attr_dump_errors.attr,
7927         &dev_attr_dump_events.attr,
7928         &dev_attr_flags.attr,
7929         &dev_attr_filter_flags.attr,
7930 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7931         &dev_attr_measurement.attr,
7932 #endif
7933         &dev_attr_power_level.attr,
7934         &dev_attr_retry_rate.attr,
7935         &dev_attr_rf_kill.attr,
7936         &dev_attr_rs_window.attr,
7937         &dev_attr_statistics.attr,
7938         &dev_attr_status.attr,
7939         &dev_attr_temperature.attr,
7940         &dev_attr_tx_power.attr,
7941
7942         NULL
7943 };
7944
7945 static struct attribute_group iwl3945_attribute_group = {
7946         .name = NULL,           /* put in device directory */
7947         .attrs = iwl3945_sysfs_entries,
7948 };
7949
7950 static struct ieee80211_ops iwl3945_hw_ops = {
7951         .tx = iwl3945_mac_tx,
7952         .start = iwl3945_mac_start,
7953         .stop = iwl3945_mac_stop,
7954         .add_interface = iwl3945_mac_add_interface,
7955         .remove_interface = iwl3945_mac_remove_interface,
7956         .config = iwl3945_mac_config,
7957         .config_interface = iwl3945_mac_config_interface,
7958         .configure_filter = iwl3945_configure_filter,
7959         .set_key = iwl3945_mac_set_key,
7960         .get_stats = iwl3945_mac_get_stats,
7961         .get_tx_stats = iwl3945_mac_get_tx_stats,
7962         .conf_tx = iwl3945_mac_conf_tx,
7963         .get_tsf = iwl3945_mac_get_tsf,
7964         .reset_tsf = iwl3945_mac_reset_tsf,
7965         .beacon_update = iwl3945_mac_beacon_update,
7966         .hw_scan = iwl3945_mac_hw_scan
7967 };
7968
7969 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7970 {
7971         int err = 0;
7972         struct iwl3945_priv *priv;
7973         struct ieee80211_hw *hw;
7974         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7975         int i;
7976         unsigned long flags;
7977         DECLARE_MAC_BUF(mac);
7978
7979         /* Disabling hardware scan means that mac80211 will perform scans
7980          * "the hard way", rather than using device's scan. */
7981         if (iwl3945_param_disable_hw_scan) {
7982                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7983                 iwl3945_hw_ops.hw_scan = NULL;
7984         }
7985
7986         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7987             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7988                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7989                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7990                 err = -EINVAL;
7991                 goto out;
7992         }
7993
7994         /* mac80211 allocates memory for this device instance, including
7995          *   space for this driver's private structure */
7996         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7997         if (hw == NULL) {
7998                 IWL_ERROR("Can not allocate network device\n");
7999                 err = -ENOMEM;
8000                 goto out;
8001         }
8002         SET_IEEE80211_DEV(hw, &pdev->dev);
8003
8004         hw->rate_control_algorithm = "iwl-3945-rs";
8005
8006         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8007         priv = hw->priv;
8008         priv->hw = hw;
8009
8010         priv->pci_dev = pdev;
8011         priv->cfg = cfg;
8012
8013         /* Select antenna (may be helpful if only one antenna is connected) */
8014         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
8015 #ifdef CONFIG_IWL3945_DEBUG
8016         iwl3945_debug_level = iwl3945_param_debug;
8017         atomic_set(&priv->restrict_refcnt, 0);
8018 #endif
8019         priv->retry_rate = 1;
8020
8021         priv->ibss_beacon = NULL;
8022
8023         /* Tell mac80211 our characteristics */
8024         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
8025                     IEEE80211_HW_SIGNAL_DBM |
8026                     IEEE80211_HW_NOISE_DBM;
8027
8028         /* 4 EDCA QOS priorities */
8029         hw->queues = 4;
8030
8031         spin_lock_init(&priv->lock);
8032         spin_lock_init(&priv->power_data.lock);
8033         spin_lock_init(&priv->sta_lock);
8034         spin_lock_init(&priv->hcmd_lock);
8035
8036         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8037                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8038
8039         INIT_LIST_HEAD(&priv->free_frames);
8040
8041         mutex_init(&priv->mutex);
8042         if (pci_enable_device(pdev)) {
8043                 err = -ENODEV;
8044                 goto out_ieee80211_free_hw;
8045         }
8046
8047         pci_set_master(pdev);
8048
8049         /* Clear the driver's (not device's) station table */
8050         iwl3945_clear_stations_table(priv);
8051
8052         priv->data_retry_limit = -1;
8053         priv->ieee_channels = NULL;
8054         priv->ieee_rates = NULL;
8055         priv->band = IEEE80211_BAND_2GHZ;
8056
8057         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8058         if (!err)
8059                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8060         if (err) {
8061                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8062                 goto out_pci_disable_device;
8063         }
8064
8065         pci_set_drvdata(pdev, priv);
8066         err = pci_request_regions(pdev, DRV_NAME);
8067         if (err)
8068                 goto out_pci_disable_device;
8069
8070         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8071          * PCI Tx retries from interfering with C3 CPU state */
8072         pci_write_config_byte(pdev, 0x41, 0x00);
8073
8074         priv->hw_base = pci_iomap(pdev, 0, 0);
8075         if (!priv->hw_base) {
8076                 err = -ENODEV;
8077                 goto out_pci_release_regions;
8078         }
8079
8080         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8081                         (unsigned long long) pci_resource_len(pdev, 0));
8082         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8083
8084         /* Initialize module parameter values here */
8085
8086         /* Disable radio (SW RF KILL) via parameter when loading driver */
8087         if (iwl3945_param_disable) {
8088                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8089                 IWL_DEBUG_INFO("Radio disabled.\n");
8090         }
8091
8092         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8093
8094         printk(KERN_INFO DRV_NAME
8095                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8096
8097         /* Device-specific setup */
8098         if (iwl3945_hw_set_hw_setting(priv)) {
8099                 IWL_ERROR("failed to set hw settings\n");
8100                 goto out_iounmap;
8101         }
8102
8103         if (iwl3945_param_qos_enable)
8104                 priv->qos_data.qos_enable = 1;
8105
8106         iwl3945_reset_qos(priv);
8107
8108         priv->qos_data.qos_active = 0;
8109         priv->qos_data.qos_cap.val = 0;
8110
8111         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8112         iwl3945_setup_deferred_work(priv);
8113         iwl3945_setup_rx_handlers(priv);
8114
8115         priv->rates_mask = IWL_RATES_MASK;
8116         /* If power management is turned on, default to AC mode */
8117         priv->power_mode = IWL_POWER_AC;
8118         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8119
8120         spin_lock_irqsave(&priv->lock, flags);
8121         iwl3945_disable_interrupts(priv);
8122         spin_unlock_irqrestore(&priv->lock, flags);
8123
8124         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8125         if (err) {
8126                 IWL_ERROR("failed to create sysfs device attributes\n");
8127                 goto out_release_irq;
8128         }
8129
8130         /* nic init */
8131         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8132                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8133
8134         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8135         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8136                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8137                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8138         if (err < 0) {
8139                 IWL_DEBUG_INFO("Failed to init the card\n");
8140                 goto out_remove_sysfs;
8141         }
8142         /* Read the EEPROM */
8143         err = iwl3945_eeprom_init(priv);
8144         if (err) {
8145                 IWL_ERROR("Unable to init EEPROM\n");
8146                 goto out_remove_sysfs;
8147         }
8148         /* MAC Address location in EEPROM same for 3945/4965 */
8149         get_eeprom_mac(priv, priv->mac_addr);
8150         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8151         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8152
8153         err = iwl3945_init_channel_map(priv);
8154         if (err) {
8155                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8156                 goto out_remove_sysfs;
8157         }
8158
8159         err = iwl3945_init_geos(priv);
8160         if (err) {
8161                 IWL_ERROR("initializing geos failed: %d\n", err);
8162                 goto out_free_channel_map;
8163         }
8164
8165         err = ieee80211_register_hw(priv->hw);
8166         if (err) {
8167                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8168                 goto out_free_geos;
8169         }
8170
8171         priv->hw->conf.beacon_int = 100;
8172         priv->mac80211_registered = 1;
8173         pci_save_state(pdev);
8174         pci_disable_device(pdev);
8175
8176         return 0;
8177
8178  out_free_geos:
8179         iwl3945_free_geos(priv);
8180  out_free_channel_map:
8181         iwl3945_free_channel_map(priv);
8182  out_remove_sysfs:
8183         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8184
8185  out_release_irq:
8186         destroy_workqueue(priv->workqueue);
8187         priv->workqueue = NULL;
8188         iwl3945_unset_hw_setting(priv);
8189
8190  out_iounmap:
8191         pci_iounmap(pdev, priv->hw_base);
8192  out_pci_release_regions:
8193         pci_release_regions(pdev);
8194  out_pci_disable_device:
8195         pci_disable_device(pdev);
8196         pci_set_drvdata(pdev, NULL);
8197  out_ieee80211_free_hw:
8198         ieee80211_free_hw(priv->hw);
8199  out:
8200         return err;
8201 }
8202
8203 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8204 {
8205         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8206         struct list_head *p, *q;
8207         int i;
8208         unsigned long flags;
8209
8210         if (!priv)
8211                 return;
8212
8213         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8214
8215         set_bit(STATUS_EXIT_PENDING, &priv->status);
8216
8217         iwl3945_down(priv);
8218
8219         /* make sure we flush any pending irq or
8220          * tasklet for the driver
8221          */
8222         spin_lock_irqsave(&priv->lock, flags);
8223         iwl3945_disable_interrupts(priv);
8224         spin_unlock_irqrestore(&priv->lock, flags);
8225
8226         iwl_synchronize_irq(priv);
8227
8228         /* Free MAC hash list for ADHOC */
8229         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8230                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8231                         list_del(p);
8232                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8233                 }
8234         }
8235
8236         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8237
8238         iwl3945_dealloc_ucode_pci(priv);
8239
8240         if (priv->rxq.bd)
8241                 iwl3945_rx_queue_free(priv, &priv->rxq);
8242         iwl3945_hw_txq_ctx_free(priv);
8243
8244         iwl3945_unset_hw_setting(priv);
8245         iwl3945_clear_stations_table(priv);
8246
8247         if (priv->mac80211_registered) {
8248                 ieee80211_unregister_hw(priv->hw);
8249         }
8250
8251         /*netif_stop_queue(dev); */
8252         flush_workqueue(priv->workqueue);
8253
8254         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8255          * priv->workqueue... so we can't take down the workqueue
8256          * until now... */
8257         destroy_workqueue(priv->workqueue);
8258         priv->workqueue = NULL;
8259
8260         pci_iounmap(pdev, priv->hw_base);
8261         pci_release_regions(pdev);
8262         pci_disable_device(pdev);
8263         pci_set_drvdata(pdev, NULL);
8264
8265         iwl3945_free_channel_map(priv);
8266         iwl3945_free_geos(priv);
8267
8268         if (priv->ibss_beacon)
8269                 dev_kfree_skb(priv->ibss_beacon);
8270
8271         ieee80211_free_hw(priv->hw);
8272 }
8273
8274 #ifdef CONFIG_PM
8275
8276 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8277 {
8278         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8279
8280         if (priv->is_open) {
8281                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8282                 iwl3945_mac_stop(priv->hw);
8283                 priv->is_open = 1;
8284         }
8285
8286         pci_set_power_state(pdev, PCI_D3hot);
8287
8288         return 0;
8289 }
8290
8291 static int iwl3945_pci_resume(struct pci_dev *pdev)
8292 {
8293         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8294
8295         pci_set_power_state(pdev, PCI_D0);
8296
8297         if (priv->is_open)
8298                 iwl3945_mac_start(priv->hw);
8299
8300         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8301         return 0;
8302 }
8303
8304 #endif /* CONFIG_PM */
8305
8306 /*****************************************************************************
8307  *
8308  * driver and module entry point
8309  *
8310  *****************************************************************************/
8311
8312 static struct pci_driver iwl3945_driver = {
8313         .name = DRV_NAME,
8314         .id_table = iwl3945_hw_card_ids,
8315         .probe = iwl3945_pci_probe,
8316         .remove = __devexit_p(iwl3945_pci_remove),
8317 #ifdef CONFIG_PM
8318         .suspend = iwl3945_pci_suspend,
8319         .resume = iwl3945_pci_resume,
8320 #endif
8321 };
8322
8323 static int __init iwl3945_init(void)
8324 {
8325
8326         int ret;
8327         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8328         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8329
8330         ret = iwl3945_rate_control_register();
8331         if (ret) {
8332                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8333                 return ret;
8334         }
8335
8336         ret = pci_register_driver(&iwl3945_driver);
8337         if (ret) {
8338                 IWL_ERROR("Unable to initialize PCI module\n");
8339                 goto error_register;
8340         }
8341 #ifdef CONFIG_IWL3945_DEBUG
8342         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8343         if (ret) {
8344                 IWL_ERROR("Unable to create driver sysfs file\n");
8345                 goto error_debug;
8346         }
8347 #endif
8348
8349         return ret;
8350
8351 #ifdef CONFIG_IWL3945_DEBUG
8352 error_debug:
8353         pci_unregister_driver(&iwl3945_driver);
8354 #endif
8355 error_register:
8356         iwl3945_rate_control_unregister();
8357         return ret;
8358 }
8359
8360 static void __exit iwl3945_exit(void)
8361 {
8362 #ifdef CONFIG_IWL3945_DEBUG
8363         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8364 #endif
8365         pci_unregister_driver(&iwl3945_driver);
8366         iwl3945_rate_control_unregister();
8367 }
8368
8369 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8370 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8371 module_param_named(disable, iwl3945_param_disable, int, 0444);
8372 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8373 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8374 MODULE_PARM_DESC(hwcrypto,
8375                  "using hardware crypto engine (default 0 [software])\n");
8376 module_param_named(debug, iwl3945_param_debug, int, 0444);
8377 MODULE_PARM_DESC(debug, "debug output mask");
8378 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8379 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8380
8381 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8382 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8383
8384 /* QoS */
8385 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8386 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8387
8388 module_exit(iwl3945_exit);
8389 module_init(iwl3945_init);