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 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 106 {
 107         u16 fc = le16_to_cpu(hdr->frame_control);
 108         int hdr_len = ieee80211_get_hdrlen(fc);
 109
 110         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 111                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 112         return NULL;
 113 }
 114
 115 static const struct ieee80211_supported_band *iwl3945_get_band(
 116                 struct iwl3945_priv *priv, enum ieee80211_band band)
 117 {
 118         return priv->hw->wiphy->bands[band];
 119 }
 120
 121 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 122 {
 123         /* Single white space is for Linksys APs */
 124         if (essid_len == 1 && essid[0] == ' ')
 125                 return 1;
 126
 127         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 128         while (essid_len) {
 129                 essid_len--;
 130                 if (essid[essid_len] != '\0')
 131                         return 0;
 132         }
 133
 134         return 1;
 135 }
 136
 137 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 138 {
 139         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 140         const char *s = essid;
 141         char *d = escaped;
 142
 143         if (iwl3945_is_empty_essid(essid, essid_len)) {
 144                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 145                 return escaped;
 146         }
 147
 148         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 149         while (essid_len--) {
 150                 if (*s == '\0') {
 151                         *d++ = '\\';
 152                         *d++ = '0';
 153                         s++;
 154                 } else
 155                         *d++ = *s++;
 156         }
 157         *d = '\0';
 158         return escaped;
 159 }
 160
 161 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 162  * DMA services
 163  *
 164  * Theory of operation
 165  *
 166  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 167  * of buffer descriptors, each of which points to one or more data buffers for
 168  * the device to read from or fill.  Driver and device exchange status of each
 169  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 170  * entries in each circular buffer, to protect against confusing empty and full
 171  * queue states.
 172  *
 173  * The device reads or writes the data in the queues via the device's several
 174  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 175  *
 176  * For Tx queue, there are low mark and high mark limits. If, after queuing
 177  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 178  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 179  * Tx queue resumed.
 180  *
 181  * The 3945 operates with six queues:  One receive queue, one transmit queue
 182  * (#4) for sending commands to the device firmware, and four transmit queues
 183  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 184  ***************************************************/
 185
 186 int iwl3945_queue_space(const struct iwl3945_queue *q)
 187 {
 188         int s = q->read_ptr - q->write_ptr;
 189
 190         if (q->read_ptr > q->write_ptr)
 191                 s -= q->n_bd;
 192
 193         if (s <= 0)
 194                 s += q->n_window;
 195         /* keep some reserve to not confuse empty and full situations */
 196         s -= 2;
 197         if (s < 0)
 198                 s = 0;
 199         return s;
 200 }
 201
 202 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 203 {
 204         return q->write_ptr > q->read_ptr ?
 205                 (i >= q->read_ptr && i < q->write_ptr) :
 206                 !(i < q->read_ptr && i >= q->write_ptr);
 207 }
 208
 209
 210 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 211 {
 212         /* This is for scan command, the big buffer at end of command array */
 213         if (is_huge)
 214                 return q->n_window;     /* must be power of 2 */
 215
 216         /* Otherwise, use normal size buffers */
 217         return index & (q->n_window - 1);
 218 }
 219
 220 /**
 221  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 222  */
 223 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 224                           int count, int slots_num, u32 id)
 225 {
 226         q->n_bd = count;
 227         q->n_window = slots_num;
 228         q->id = id;
 229
 230         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 231          * and iwl_queue_dec_wrap are broken. */
 232         BUG_ON(!is_power_of_2(count));
 233
 234         /* slots_num must be power-of-two size, otherwise
 235          * get_cmd_index is broken. */
 236         BUG_ON(!is_power_of_2(slots_num));
 237
 238         q->low_mark = q->n_window / 4;
 239         if (q->low_mark < 4)
 240                 q->low_mark = 4;
 241
 242         q->high_mark = q->n_window / 8;
 243         if (q->high_mark < 2)
 244                 q->high_mark = 2;
 245
 246         q->write_ptr = q->read_ptr = 0;
 247
 248         return 0;
 249 }
 250
 251 /**
 252  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 253  */
 254 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 255                               struct iwl3945_tx_queue *txq, u32 id)
 256 {
 257         struct pci_dev *dev = priv->pci_dev;
 258
 259         /* Driver private data, only for Tx (not command) queues,
 260          * not shared with device. */
 261         if (id != IWL_CMD_QUEUE_NUM) {
 262                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 263                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 264                 if (!txq->txb) {
 265                         IWL_ERROR("kmalloc for auxiliary BD "
 266                                   "structures failed\n");
 267                         goto error;
 268                 }
 269         } else
 270                 txq->txb = NULL;
 271
 272         /* Circular buffer of transmit frame descriptors (TFDs),
 273          * shared with device */
 274         txq->bd = pci_alloc_consistent(dev,
 275                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 276                         &txq->q.dma_addr);
 277
 278         if (!txq->bd) {
 279                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 280                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 281                 goto error;
 282         }
 283         txq->q.id = id;
 284
 285         return 0;
 286
 287  error:
 288         if (txq->txb) {
 289                 kfree(txq->txb);
 290                 txq->txb = NULL;
 291         }
 292
 293         return -ENOMEM;
 294 }
 295
 296 /**
 297  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 298  */
 299 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 300                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 301 {
 302         struct pci_dev *dev = priv->pci_dev;
 303         int len;
 304         int rc = 0;
 305
 306         /*
 307          * Alloc buffer array for commands (Tx or other types of commands).
 308          * For the command queue (#4), allocate command space + one big
 309          * command for scan, since scan command is very huge; the system will
 310          * not have two scans at the same time, so only one is needed.
 311          * For data Tx queues (all other queues), no super-size command
 312          * space is needed.
 313          */
 314         len = sizeof(struct iwl3945_cmd) * slots_num;
 315         if (txq_id == IWL_CMD_QUEUE_NUM)
 316                 len +=  IWL_MAX_SCAN_SIZE;
 317         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 318         if (!txq->cmd)
 319                 return -ENOMEM;
 320
 321         /* Alloc driver data array and TFD circular buffer */
 322         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 323         if (rc) {
 324                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 325
 326                 return -ENOMEM;
 327         }
 328         txq->need_update = 0;
 329
 330         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 331          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 332         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 333
 334         /* Initialize queue high/low-water, head/tail indexes */
 335         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 336
 337         /* Tell device where to find queue, enable DMA channel. */
 338         iwl3945_hw_tx_queue_init(priv, txq);
 339
 340         return 0;
 341 }
 342
 343 /**
 344  * iwl3945_tx_queue_free - Deallocate DMA queue.
 345  * @txq: Transmit queue to deallocate.
 346  *
 347  * Empty queue by removing and destroying all BD's.
 348  * Free all buffers.
 349  * 0-fill, but do not free "txq" descriptor structure.
 350  */
 351 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 352 {
 353         struct iwl3945_queue *q = &txq->q;
 354         struct pci_dev *dev = priv->pci_dev;
 355         int len;
 356
 357         if (q->n_bd == 0)
 358                 return;
 359
 360         /* first, empty all BD's */
 361         for (; q->write_ptr != q->read_ptr;
 362              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 363                 iwl3945_hw_txq_free_tfd(priv, txq);
 364
 365         len = sizeof(struct iwl3945_cmd) * q->n_window;
 366         if (q->id == IWL_CMD_QUEUE_NUM)
 367                 len += IWL_MAX_SCAN_SIZE;
 368
 369         /* De-alloc array of command/tx buffers */
 370         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 371
 372         /* De-alloc circular buffer of TFDs */
 373         if (txq->q.n_bd)
 374                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 375                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 376
 377         /* De-alloc array of per-TFD driver data */
 378         if (txq->txb) {
 379                 kfree(txq->txb);
 380                 txq->txb = NULL;
 381         }
 382
 383         /* 0-fill queue descriptor structure */
 384         memset(txq, 0, sizeof(*txq));
 385 }
 386
 387 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 388
 389 /*************** STATION TABLE MANAGEMENT ****
 390  * mac80211 should be examined to determine if sta_info is duplicating
 391  * the functionality provided here
 392  */
 393
 394 /**************************************************************/
 395 #if 0 /* temporary disable till we add real remove station */
 396 /**
 397  * iwl3945_remove_station - Remove driver's knowledge of station.
 398  *
 399  * NOTE:  This does not remove station from device's station table.
 400  */
 401 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 402 {
 403         int index = IWL_INVALID_STATION;
 404         int i;
 405         unsigned long flags;
 406
 407         spin_lock_irqsave(&priv->sta_lock, flags);
 408
 409         if (is_ap)
 410                 index = IWL_AP_ID;
 411         else if (is_broadcast_ether_addr(addr))
 412                 index = priv->hw_setting.bcast_sta_id;
 413         else
 414                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 415                         if (priv->stations[i].used &&
 416                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 417                                                 addr)) {
 418                                 index = i;
 419                                 break;
 420                         }
 421
 422         if (unlikely(index == IWL_INVALID_STATION))
 423                 goto out;
 424
 425         if (priv->stations[index].used) {
 426                 priv->stations[index].used = 0;
 427                 priv->num_stations--;
 428         }
 429
 430         BUG_ON(priv->num_stations < 0);
 431
 432 out:
 433         spin_unlock_irqrestore(&priv->sta_lock, flags);
 434         return 0;
 435 }
 436 #endif
 437
 438 /**
 439  * iwl3945_clear_stations_table - Clear the driver's station table
 440  *
 441  * NOTE:  This does not clear or otherwise alter the device's station table.
 442  */
 443 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 444 {
 445         unsigned long flags;
 446
 447         spin_lock_irqsave(&priv->sta_lock, flags);
 448
 449         priv->num_stations = 0;
 450         memset(priv->stations, 0, sizeof(priv->stations));
 451
 452         spin_unlock_irqrestore(&priv->sta_lock, flags);
 453 }
 454
 455 /**
 456  * iwl3945_add_station - Add station to station tables in driver and device
 457  */
 458 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 459 {
 460         int i;
 461         int index = IWL_INVALID_STATION;
 462         struct iwl3945_station_entry *station;
 463         unsigned long flags_spin;
 464         DECLARE_MAC_BUF(mac);
 465         u8 rate;
 466
 467         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 468         if (is_ap)
 469                 index = IWL_AP_ID;
 470         else if (is_broadcast_ether_addr(addr))
 471                 index = priv->hw_setting.bcast_sta_id;
 472         else
 473                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 474                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 475                                                 addr)) {
 476                                 index = i;
 477                                 break;
 478                         }
 479
 480                         if (!priv->stations[i].used &&
 481                             index == IWL_INVALID_STATION)
 482                                 index = i;
 483                 }
 484
 485         /* These two conditions has the same outcome but keep them separate
 486           since they have different meaning */
 487         if (unlikely(index == IWL_INVALID_STATION)) {
 488                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 489                 return index;
 490         }
 491
 492         if (priv->stations[index].used &&
 493            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 494                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 495                 return index;
 496         }
 497
 498         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 499         station = &priv->stations[index];
 500         station->used = 1;
 501         priv->num_stations++;
 502
 503         /* Set up the REPLY_ADD_STA command to send to device */
 504         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 505         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 506         station->sta.mode = 0;
 507         station->sta.sta.sta_id = index;
 508         station->sta.station_flags = 0;
 509
 510         if (priv->band == IEEE80211_BAND_5GHZ)
 511                 rate = IWL_RATE_6M_PLCP;
 512         else
 513                 rate =  IWL_RATE_1M_PLCP;
 514
 515         /* Turn on both antennas for the station... */
 516         station->sta.rate_n_flags =
 517                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 518         station->current_rate.rate_n_flags =
 519                         le16_to_cpu(station->sta.rate_n_flags);
 520
 521         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 522
 523         /* Add station to device's station table */
 524         iwl3945_send_add_station(priv, &station->sta, flags);
 525         return index;
 526
 527 }
 528
 529 /*************** DRIVER STATUS FUNCTIONS   *****/
 530
 531 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 532 {
 533         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 534          * set but EXIT_PENDING is not */
 535         return test_bit(STATUS_READY, &priv->status) &&
 536                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 537                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 538 }
 539
 540 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 541 {
 542         return test_bit(STATUS_ALIVE, &priv->status);
 543 }
 544
 545 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 546 {
 547         return test_bit(STATUS_INIT, &priv->status);
 548 }
 549
 550 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 551 {
 552         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 553                test_bit(STATUS_RF_KILL_SW, &priv->status);
 554 }
 555
 556 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 557 {
 558
 559         if (iwl3945_is_rfkill(priv))
 560                 return 0;
 561
 562         return iwl3945_is_ready(priv);
 563 }
 564
 565 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 566
 567 #define IWL_CMD(x) case x : return #x
 568
 569 static const char *get_cmd_string(u8 cmd)
 570 {
 571         switch (cmd) {
 572                 IWL_CMD(REPLY_ALIVE);
 573                 IWL_CMD(REPLY_ERROR);
 574                 IWL_CMD(REPLY_RXON);
 575                 IWL_CMD(REPLY_RXON_ASSOC);
 576                 IWL_CMD(REPLY_QOS_PARAM);
 577                 IWL_CMD(REPLY_RXON_TIMING);
 578                 IWL_CMD(REPLY_ADD_STA);
 579                 IWL_CMD(REPLY_REMOVE_STA);
 580                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 581                 IWL_CMD(REPLY_3945_RX);
 582                 IWL_CMD(REPLY_TX);
 583                 IWL_CMD(REPLY_RATE_SCALE);
 584                 IWL_CMD(REPLY_LEDS_CMD);
 585                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 586                 IWL_CMD(RADAR_NOTIFICATION);
 587                 IWL_CMD(REPLY_QUIET_CMD);
 588                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 589                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 590                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 591                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 592                 IWL_CMD(POWER_TABLE_CMD);
 593                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 594                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 595                 IWL_CMD(REPLY_SCAN_CMD);
 596                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 597                 IWL_CMD(SCAN_START_NOTIFICATION);
 598                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 599                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 600                 IWL_CMD(BEACON_NOTIFICATION);
 601                 IWL_CMD(REPLY_TX_BEACON);
 602                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 603                 IWL_CMD(QUIET_NOTIFICATION);
 604                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 605                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 606                 IWL_CMD(REPLY_BT_CONFIG);
 607                 IWL_CMD(REPLY_STATISTICS_CMD);
 608                 IWL_CMD(STATISTICS_NOTIFICATION);
 609                 IWL_CMD(REPLY_CARD_STATE_CMD);
 610                 IWL_CMD(CARD_STATE_NOTIFICATION);
 611                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 612         default:
 613                 return "UNKNOWN";
 614
 615         }
 616 }
 617
 618 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 619
 620 /**
 621  * iwl3945_enqueue_hcmd - enqueue a uCode command
 622  * @priv: device private data point
 623  * @cmd: a point to the ucode command structure
 624  *
 625  * The function returns < 0 values to indicate the operation is
 626  * failed. On success, it turns the index (> 0) of command in the
 627  * command queue.
 628  */
 629 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 630 {
 631         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 632         struct iwl3945_queue *q = &txq->q;
 633         struct iwl3945_tfd_frame *tfd;
 634         u32 *control_flags;
 635         struct iwl3945_cmd *out_cmd;
 636         u32 idx;
 637         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 638         dma_addr_t phys_addr;
 639         int pad;
 640         u16 count;
 641         int ret;
 642         unsigned long flags;
 643
 644         /* If any of the command structures end up being larger than
 645          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 646          * we will need to increase the size of the TFD entries */
 647         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 648                !(cmd->meta.flags & CMD_SIZE_HUGE));
 649
 650
 651         if (iwl3945_is_rfkill(priv)) {
 652                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 653                 return -EIO;
 654         }
 655
 656         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 657                 IWL_ERROR("No space for Tx\n");
 658                 return -ENOSPC;
 659         }
 660
 661         spin_lock_irqsave(&priv->hcmd_lock, flags);
 662
 663         tfd = &txq->bd[q->write_ptr];
 664         memset(tfd, 0, sizeof(*tfd));
 665
 666         control_flags = (u32 *) tfd;
 667
 668         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 669         out_cmd = &txq->cmd[idx];
 670
 671         out_cmd->hdr.cmd = cmd->id;
 672         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 673         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 674
 675         /* At this point, the out_cmd now has all of the incoming cmd
 676          * information */
 677
 678         out_cmd->hdr.flags = 0;
 679         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 680                         INDEX_TO_SEQ(q->write_ptr));
 681         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 682                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 683
 684         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 685                         offsetof(struct iwl3945_cmd, hdr);
 686         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 687
 688         pad = U32_PAD(cmd->len);
 689         count = TFD_CTL_COUNT_GET(*control_flags);
 690         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 691
 692         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 693                      "%d bytes at %d[%d]:%d\n",
 694                      get_cmd_string(out_cmd->hdr.cmd),
 695                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 696                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 697
 698         txq->need_update = 1;
 699
 700         /* Increment and update queue's write index */
 701         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 702         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 703
 704         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 705         return ret ? ret : idx;
 706 }
 707
 708 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 709 {
 710         int ret;
 711
 712         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 713
 714         /* An asynchronous command can not expect an SKB to be set. */
 715         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 716
 717         /* An asynchronous command MUST have a callback. */
 718         BUG_ON(!cmd->meta.u.callback);
 719
 720         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 721                 return -EBUSY;
 722
 723         ret = iwl3945_enqueue_hcmd(priv, cmd);
 724         if (ret < 0) {
 725                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 726                           get_cmd_string(cmd->id), ret);
 727                 return ret;
 728         }
 729         return 0;
 730 }
 731
 732 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 733 {
 734         int cmd_idx;
 735         int ret;
 736
 737         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 738
 739          /* A synchronous command can not have a callback set. */
 740         BUG_ON(cmd->meta.u.callback != NULL);
 741
 742         if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
 743                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 744                           get_cmd_string(cmd->id));
 745                 ret = -EBUSY;
 746                 goto out;
 747         }
 748
 749         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 750
 751         if (cmd->meta.flags & CMD_WANT_SKB)
 752                 cmd->meta.source = &cmd->meta;
 753
 754         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 755         if (cmd_idx < 0) {
 756                 ret = cmd_idx;
 757                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 758                           get_cmd_string(cmd->id), ret);
 759                 goto out;
 760         }
 761
 762         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 763                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 764                         HOST_COMPLETE_TIMEOUT);
 765         if (!ret) {
 766                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 767                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 768                                   get_cmd_string(cmd->id),
 769                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 770
 771                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 772                         ret = -ETIMEDOUT;
 773                         goto cancel;
 774                 }
 775         }
 776
 777         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 778                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 779                                get_cmd_string(cmd->id));
 780                 ret = -ECANCELED;
 781                 goto fail;
 782         }
 783         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 784                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 785                                get_cmd_string(cmd->id));
 786                 ret = -EIO;
 787                 goto fail;
 788         }
 789         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 790                 IWL_ERROR("Error: Response NULL in '%s'\n",
 791                           get_cmd_string(cmd->id));
 792                 ret = -EIO;
 793                 goto out;
 794         }
 795
 796         ret = 0;
 797         goto out;
 798
 799 cancel:
 800         if (cmd->meta.flags & CMD_WANT_SKB) {
 801                 struct iwl3945_cmd *qcmd;
 802
 803                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 804                  * TX cmd queue. Otherwise in case the cmd comes
 805                  * in later, it will possibly set an invalid
 806                  * address (cmd->meta.source). */
 807                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 808                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 809         }
 810 fail:
 811         if (cmd->meta.u.skb) {
 812                 dev_kfree_skb_any(cmd->meta.u.skb);
 813                 cmd->meta.u.skb = NULL;
 814         }
 815 out:
 816         clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
 817         return ret;
 818 }
 819
 820 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 821 {
 822         if (cmd->meta.flags & CMD_ASYNC)
 823                 return iwl3945_send_cmd_async(priv, cmd);
 824
 825         return iwl3945_send_cmd_sync(priv, cmd);
 826 }
 827
 828 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 829 {
 830         struct iwl3945_host_cmd cmd = {
 831                 .id = id,
 832                 .len = len,
 833                 .data = data,
 834         };
 835
 836         return iwl3945_send_cmd_sync(priv, &cmd);
 837 }
 838
 839 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 840 {
 841         struct iwl3945_host_cmd cmd = {
 842                 .id = id,
 843                 .len = sizeof(val),
 844                 .data = &val,
 845         };
 846
 847         return iwl3945_send_cmd_sync(priv, &cmd);
 848 }
 849
 850 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 851 {
 852         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 853 }
 854
 855 /**
 856  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 857  * @band: 2.4 or 5 GHz band
 858  * @channel: Any channel valid for the requested band
 859
 860  * In addition to setting the staging RXON, priv->band is also set.
 861  *
 862  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 863  * in the staging RXON flag structure based on the band
 864  */
 865 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 866                                     enum ieee80211_band band,
 867                                     u16 channel)
 868 {
 869         if (!iwl3945_get_channel_info(priv, band, channel)) {
 870                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 871                                channel, band);
 872                 return -EINVAL;
 873         }
 874
 875         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 876             (priv->band == band))
 877                 return 0;
 878
 879         priv->staging_rxon.channel = cpu_to_le16(channel);
 880         if (band == IEEE80211_BAND_5GHZ)
 881                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 882         else
 883                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 884
 885         priv->band = band;
 886
 887         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 888
 889         return 0;
 890 }
 891
 892 /**
 893  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 894  *
 895  * NOTE:  This is really only useful during development and can eventually
 896  * be #ifdef'd out once the driver is stable and folks aren't actively
 897  * making changes
 898  */
 899 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 900 {
 901         int error = 0;
 902         int counter = 1;
 903
 904         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 905                 error |= le32_to_cpu(rxon->flags &
 906                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 907                                  RXON_FLG_RADAR_DETECT_MSK));
 908                 if (error)
 909                         IWL_WARNING("check 24G fields %d | %d\n",
 910                                     counter++, error);
 911         } else {
 912                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 913                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 914                 if (error)
 915                         IWL_WARNING("check 52 fields %d | %d\n",
 916                                     counter++, error);
 917                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 918                 if (error)
 919                         IWL_WARNING("check 52 CCK %d | %d\n",
 920                                     counter++, error);
 921         }
 922         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 923         if (error)
 924                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 925
 926         /* make sure basic rates 6Mbps and 1Mbps are supported */
 927         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 928                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 929         if (error)
 930                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 931
 932         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 933         if (error)
 934                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 935
 936         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 937                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 938         if (error)
 939                 IWL_WARNING("check CCK and short slot %d | %d\n",
 940                             counter++, error);
 941
 942         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 943                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 944         if (error)
 945                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 946                             counter++, error);
 947
 948         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 949                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 950         if (error)
 951                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 952                             counter++, error);
 953
 954         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 955                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 956                                 RXON_FLG_ANT_A_MSK)) == 0);
 957         if (error)
 958                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 959
 960         if (error)
 961                 IWL_WARNING("Tuning to channel %d\n",
 962                             le16_to_cpu(rxon->channel));
 963
 964         if (error) {
 965                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 966                 return -1;
 967         }
 968         return 0;
 969 }
 970
 971 /**
 972  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 973  * @priv: staging_rxon is compared to active_rxon
 974  *
 975  * If the RXON structure is changing enough to require a new tune,
 976  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 977  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 978  */
 979 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
 980 {
 981
 982         /* These items are only settable from the full RXON command */
 983         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 984             compare_ether_addr(priv->staging_rxon.bssid_addr,
 985                                priv->active_rxon.bssid_addr) ||
 986             compare_ether_addr(priv->staging_rxon.node_addr,
 987                                priv->active_rxon.node_addr) ||
 988             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 989                                priv->active_rxon.wlap_bssid_addr) ||
 990             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 991             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 992             (priv->staging_rxon.air_propagation !=
 993              priv->active_rxon.air_propagation) ||
 994             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 995                 return 1;
 996
 997         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 998          * be updated with the RXON_ASSOC command -- however only some
 999          * flag transitions are allowed using RXON_ASSOC */
1000
1001         /* Check if we are not switching bands */
1002         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1003             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1004                 return 1;
1005
1006         /* Check if we are switching association toggle */
1007         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1008                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1009                 return 1;
1010
1011         return 0;
1012 }
1013
1014 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1015 {
1016         int rc = 0;
1017         struct iwl3945_rx_packet *res = NULL;
1018         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1019         struct iwl3945_host_cmd cmd = {
1020                 .id = REPLY_RXON_ASSOC,
1021                 .len = sizeof(rxon_assoc),
1022                 .meta.flags = CMD_WANT_SKB,
1023                 .data = &rxon_assoc,
1024         };
1025         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1026         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1027
1028         if ((rxon1->flags == rxon2->flags) &&
1029             (rxon1->filter_flags == rxon2->filter_flags) &&
1030             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1031             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1032                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1033                 return 0;
1034         }
1035
1036         rxon_assoc.flags = priv->staging_rxon.flags;
1037         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1038         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1039         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1040         rxon_assoc.reserved = 0;
1041
1042         rc = iwl3945_send_cmd_sync(priv, &cmd);
1043         if (rc)
1044                 return rc;
1045
1046         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1047         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1048                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1049                 rc = -EIO;
1050         }
1051
1052         priv->alloc_rxb_skb--;
1053         dev_kfree_skb_any(cmd.meta.u.skb);
1054
1055         return rc;
1056 }
1057
1058 /**
1059  * iwl3945_commit_rxon - commit staging_rxon to hardware
1060  *
1061  * The RXON command in staging_rxon is committed to the hardware and
1062  * the active_rxon structure is updated with the new data.  This
1063  * function correctly transitions out of the RXON_ASSOC_MSK state if
1064  * a HW tune is required based on the RXON structure changes.
1065  */
1066 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1067 {
1068         /* cast away the const for active_rxon in this function */
1069         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1070         int rc = 0;
1071         DECLARE_MAC_BUF(mac);
1072
1073         if (!iwl3945_is_alive(priv))
1074                 return -1;
1075
1076         /* always get timestamp with Rx frame */
1077         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1078
1079         /* select antenna */
1080         priv->staging_rxon.flags &=
1081             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1082         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1083
1084         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1085         if (rc) {
1086                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1087                 return -EINVAL;
1088         }
1089
1090         /* If we don't need to send a full RXON, we can use
1091          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1092          * and other flags for the current radio configuration. */
1093         if (!iwl3945_full_rxon_required(priv)) {
1094                 rc = iwl3945_send_rxon_assoc(priv);
1095                 if (rc) {
1096                         IWL_ERROR("Error setting RXON_ASSOC "
1097                                   "configuration (%d).\n", rc);
1098                         return rc;
1099                 }
1100
1101                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1102
1103                 return 0;
1104         }
1105
1106         /* If we are currently associated and the new config requires
1107          * an RXON_ASSOC and the new config wants the associated mask enabled,
1108          * we must clear the associated from the active configuration
1109          * before we apply the new config */
1110         if (iwl3945_is_associated(priv) &&
1111             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1112                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1113                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1114
1115                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1116                                       sizeof(struct iwl3945_rxon_cmd),
1117                                       &priv->active_rxon);
1118
1119                 /* If the mask clearing failed then we set
1120                  * active_rxon back to what it was previously */
1121                 if (rc) {
1122                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1123                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1124                                   "configuration (%d).\n", rc);
1125                         return rc;
1126                 }
1127         }
1128
1129         IWL_DEBUG_INFO("Sending RXON\n"
1130                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1131                        "* channel = %d\n"
1132                        "* bssid = %s\n",
1133                        ((priv->staging_rxon.filter_flags &
1134                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1135                        le16_to_cpu(priv->staging_rxon.channel),
1136                        print_mac(mac, priv->staging_rxon.bssid_addr));
1137
1138         /* Apply the new configuration */
1139         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1140                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1141         if (rc) {
1142                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1143                 return rc;
1144         }
1145
1146         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1147
1148         iwl3945_clear_stations_table(priv);
1149
1150         /* If we issue a new RXON command which required a tune then we must
1151          * send a new TXPOWER command or we won't be able to Tx any frames */
1152         rc = iwl3945_hw_reg_send_txpower(priv);
1153         if (rc) {
1154                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1155                 return rc;
1156         }
1157
1158         /* Add the broadcast address so we can send broadcast frames */
1159         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1160             IWL_INVALID_STATION) {
1161                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1162                 return -EIO;
1163         }
1164
1165         /* If we have set the ASSOC_MSK and we are in BSS mode then
1166          * add the IWL_AP_ID to the station rate table */
1167         if (iwl3945_is_associated(priv) &&
1168             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1169                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1170                     == IWL_INVALID_STATION) {
1171                         IWL_ERROR("Error adding AP address for transmit.\n");
1172                         return -EIO;
1173                 }
1174
1175         /* Init the hardware's rate fallback order based on the band */
1176         rc = iwl3945_init_hw_rate_table(priv);
1177         if (rc) {
1178                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1179                 return -EIO;
1180         }
1181
1182         return 0;
1183 }
1184
1185 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1186 {
1187         struct iwl3945_bt_cmd bt_cmd = {
1188                 .flags = 3,
1189                 .lead_time = 0xAA,
1190                 .max_kill = 1,
1191                 .kill_ack_mask = 0,
1192                 .kill_cts_mask = 0,
1193         };
1194
1195         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1196                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1197 }
1198
1199 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1200 {
1201         int rc = 0;
1202         struct iwl3945_rx_packet *res;
1203         struct iwl3945_host_cmd cmd = {
1204                 .id = REPLY_SCAN_ABORT_CMD,
1205                 .meta.flags = CMD_WANT_SKB,
1206         };
1207
1208         /* If there isn't a scan actively going on in the hardware
1209          * then we are in between scan bands and not actually
1210          * actively scanning, so don't send the abort command */
1211         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1212                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1213                 return 0;
1214         }
1215
1216         rc = iwl3945_send_cmd_sync(priv, &cmd);
1217         if (rc) {
1218                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1219                 return rc;
1220         }
1221
1222         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1223         if (res->u.status != CAN_ABORT_STATUS) {
1224                 /* The scan abort will return 1 for success or
1225                  * 2 for "failure".  A failure condition can be
1226                  * due to simply not being in an active scan which
1227                  * can occur if we send the scan abort before we
1228                  * the microcode has notified us that a scan is
1229                  * completed. */
1230                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1231                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1232                 clear_bit(STATUS_SCAN_HW, &priv->status);
1233         }
1234
1235         dev_kfree_skb_any(cmd.meta.u.skb);
1236
1237         return rc;
1238 }
1239
1240 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1241                                         struct iwl3945_cmd *cmd,
1242                                         struct sk_buff *skb)
1243 {
1244         return 1;
1245 }
1246
1247 /*
1248  * CARD_STATE_CMD
1249  *
1250  * Use: Sets the device's internal card state to enable, disable, or halt
1251  *
1252  * When in the 'enable' state the card operates as normal.
1253  * When in the 'disable' state, the card enters into a low power mode.
1254  * When in the 'halt' state, the card is shut down and must be fully
1255  * restarted to come back on.
1256  */
1257 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1258 {
1259         struct iwl3945_host_cmd cmd = {
1260                 .id = REPLY_CARD_STATE_CMD,
1261                 .len = sizeof(u32),
1262                 .data = &flags,
1263                 .meta.flags = meta_flag,
1264         };
1265
1266         if (meta_flag & CMD_ASYNC)
1267                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1268
1269         return iwl3945_send_cmd(priv, &cmd);
1270 }
1271
1272 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1273                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1274 {
1275         struct iwl3945_rx_packet *res = NULL;
1276
1277         if (!skb) {
1278                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1279                 return 1;
1280         }
1281
1282         res = (struct iwl3945_rx_packet *)skb->data;
1283         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1284                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1285                           res->hdr.flags);
1286                 return 1;
1287         }
1288
1289         switch (res->u.add_sta.status) {
1290         case ADD_STA_SUCCESS_MSK:
1291                 break;
1292         default:
1293                 break;
1294         }
1295
1296         /* We didn't cache the SKB; let the caller free it */
1297         return 1;
1298 }
1299
1300 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1301                          struct iwl3945_addsta_cmd *sta, u8 flags)
1302 {
1303         struct iwl3945_rx_packet *res = NULL;
1304         int rc = 0;
1305         struct iwl3945_host_cmd cmd = {
1306                 .id = REPLY_ADD_STA,
1307                 .len = sizeof(struct iwl3945_addsta_cmd),
1308                 .meta.flags = flags,
1309                 .data = sta,
1310         };
1311
1312         if (flags & CMD_ASYNC)
1313                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1314         else
1315                 cmd.meta.flags |= CMD_WANT_SKB;
1316
1317         rc = iwl3945_send_cmd(priv, &cmd);
1318
1319         if (rc || (flags & CMD_ASYNC))
1320                 return rc;
1321
1322         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1323         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1324                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1325                           res->hdr.flags);
1326                 rc = -EIO;
1327         }
1328
1329         if (rc == 0) {
1330                 switch (res->u.add_sta.status) {
1331                 case ADD_STA_SUCCESS_MSK:
1332                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1333                         break;
1334                 default:
1335                         rc = -EIO;
1336                         IWL_WARNING("REPLY_ADD_STA failed\n");
1337                         break;
1338                 }
1339         }
1340
1341         priv->alloc_rxb_skb--;
1342         dev_kfree_skb_any(cmd.meta.u.skb);
1343
1344         return rc;
1345 }
1346
1347 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1348                                    struct ieee80211_key_conf *keyconf,
1349                                    u8 sta_id)
1350 {
1351         unsigned long flags;
1352         __le16 key_flags = 0;
1353
1354         switch (keyconf->alg) {
1355         case ALG_CCMP:
1356                 key_flags |= STA_KEY_FLG_CCMP;
1357                 key_flags |= cpu_to_le16(
1358                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1359                 key_flags &= ~STA_KEY_FLG_INVALID;
1360                 break;
1361         case ALG_TKIP:
1362         case ALG_WEP:
1363         default:
1364                 return -EINVAL;
1365         }
1366         spin_lock_irqsave(&priv->sta_lock, flags);
1367         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1368         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1369         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1370                keyconf->keylen);
1371
1372         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1373                keyconf->keylen);
1374         priv->stations[sta_id].sta.key.key_flags = key_flags;
1375         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1376         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1377
1378         spin_unlock_irqrestore(&priv->sta_lock, flags);
1379
1380         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1381         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1382         return 0;
1383 }
1384
1385 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1386 {
1387         unsigned long flags;
1388
1389         spin_lock_irqsave(&priv->sta_lock, flags);
1390         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1391         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1392         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1393         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1394         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1395         spin_unlock_irqrestore(&priv->sta_lock, flags);
1396
1397         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1398         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1399         return 0;
1400 }
1401
1402 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1403 {
1404         struct list_head *element;
1405
1406         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1407                        priv->frames_count);
1408
1409         while (!list_empty(&priv->free_frames)) {
1410                 element = priv->free_frames.next;
1411                 list_del(element);
1412                 kfree(list_entry(element, struct iwl3945_frame, list));
1413                 priv->frames_count--;
1414         }
1415
1416         if (priv->frames_count) {
1417                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1418                             priv->frames_count);
1419                 priv->frames_count = 0;
1420         }
1421 }
1422
1423 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1424 {
1425         struct iwl3945_frame *frame;
1426         struct list_head *element;
1427         if (list_empty(&priv->free_frames)) {
1428                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1429                 if (!frame) {
1430                         IWL_ERROR("Could not allocate frame!\n");
1431                         return NULL;
1432                 }
1433
1434                 priv->frames_count++;
1435                 return frame;
1436         }
1437
1438         element = priv->free_frames.next;
1439         list_del(element);
1440         return list_entry(element, struct iwl3945_frame, list);
1441 }
1442
1443 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1444 {
1445         memset(frame, 0, sizeof(*frame));
1446         list_add(&frame->list, &priv->free_frames);
1447 }
1448
1449 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1450                                 struct ieee80211_hdr *hdr,
1451                                 const u8 *dest, int left)
1452 {
1453
1454         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1455             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1456              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1457                 return 0;
1458
1459         if (priv->ibss_beacon->len > left)
1460                 return 0;
1461
1462         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1463
1464         return priv->ibss_beacon->len;
1465 }
1466
1467 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1468 {
1469         u8 i;
1470
1471         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1472              i = iwl3945_rates[i].next_ieee) {
1473                 if (rate_mask & (1 << i))
1474                         return iwl3945_rates[i].plcp;
1475         }
1476
1477         return IWL_RATE_INVALID;
1478 }
1479
1480 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1481 {
1482         struct iwl3945_frame *frame;
1483         unsigned int frame_size;
1484         int rc;
1485         u8 rate;
1486
1487         frame = iwl3945_get_free_frame(priv);
1488
1489         if (!frame) {
1490                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1491                           "command.\n");
1492                 return -ENOMEM;
1493         }
1494
1495         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1496                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1497                                                 0xFF0);
1498                 if (rate == IWL_INVALID_RATE)
1499                         rate = IWL_RATE_6M_PLCP;
1500         } else {
1501                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1502                 if (rate == IWL_INVALID_RATE)
1503                         rate = IWL_RATE_1M_PLCP;
1504         }
1505
1506         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1507
1508         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1509                               &frame->u.cmd[0]);
1510
1511         iwl3945_free_frame(priv, frame);
1512
1513         return rc;
1514 }
1515
1516 /******************************************************************************
1517  *
1518  * EEPROM related functions
1519  *
1520  ******************************************************************************/
1521
1522 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1523 {
1524         memcpy(mac, priv->eeprom.mac_address, 6);
1525 }
1526
1527 /*
1528  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1529  * embedded controller) as EEPROM reader; each read is a series of pulses
1530  * to/from the EEPROM chip, not a single event, so even reads could conflict
1531  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1532  * simply claims ownership, which should be safe when this function is called
1533  * (i.e. before loading uCode!).
1534  */
1535 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1536 {
1537         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1538         return 0;
1539 }
1540
1541 /**
1542  * iwl3945_eeprom_init - read EEPROM contents
1543  *
1544  * Load the EEPROM contents from adapter into priv->eeprom
1545  *
1546  * NOTE:  This routine uses the non-debug IO access functions.
1547  */
1548 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1549 {
1550         u16 *e = (u16 *)&priv->eeprom;
1551         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1552         u32 r;
1553         int sz = sizeof(priv->eeprom);
1554         int rc;
1555         int i;
1556         u16 addr;
1557
1558         /* The EEPROM structure has several padding buffers within it
1559          * and when adding new EEPROM maps is subject to programmer errors
1560          * which may be very difficult to identify without explicitly
1561          * checking the resulting size of the eeprom map. */
1562         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1563
1564         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1565                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1566                 return -ENOENT;
1567         }
1568
1569         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1570         rc = iwl3945_eeprom_acquire_semaphore(priv);
1571         if (rc < 0) {
1572                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1573                 return -ENOENT;
1574         }
1575
1576         /* eeprom is an array of 16bit values */
1577         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1578                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1579                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1580
1581                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1582                                         i += IWL_EEPROM_ACCESS_DELAY) {
1583                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1584                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1585                                 break;
1586                         udelay(IWL_EEPROM_ACCESS_DELAY);
1587                 }
1588
1589                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1590                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1591                         return -ETIMEDOUT;
1592                 }
1593                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1594         }
1595
1596         return 0;
1597 }
1598
1599 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1600 {
1601         if (priv->hw_setting.shared_virt)
1602                 pci_free_consistent(priv->pci_dev,
1603                                     sizeof(struct iwl3945_shared),
1604                                     priv->hw_setting.shared_virt,
1605                                     priv->hw_setting.shared_phys);
1606 }
1607
1608 /**
1609  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1610  *
1611  * return : set the bit for each supported rate insert in ie
1612  */
1613 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1614                                     u16 basic_rate, int *left)
1615 {
1616         u16 ret_rates = 0, bit;
1617         int i;
1618         u8 *cnt = ie;
1619         u8 *rates = ie + 1;
1620
1621         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1622                 if (bit & supported_rate) {
1623                         ret_rates |= bit;
1624                         rates[*cnt] = iwl3945_rates[i].ieee |
1625                                 ((bit & basic_rate) ? 0x80 : 0x00);
1626                         (*cnt)++;
1627                         (*left)--;
1628                         if ((*left <= 0) ||
1629                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1630                                 break;
1631                 }
1632         }
1633
1634         return ret_rates;
1635 }
1636
1637 /**
1638  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1639  */
1640 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1641                               struct ieee80211_mgmt *frame,
1642                               int left, int is_direct)
1643 {
1644         int len = 0;
1645         u8 *pos = NULL;
1646         u16 active_rates, ret_rates, cck_rates;
1647
1648         /* Make sure there is enough space for the probe request,
1649          * two mandatory IEs and the data */
1650         left -= 24;
1651         if (left < 0)
1652                 return 0;
1653         len += 24;
1654
1655         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1656         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1657         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1658         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1659         frame->seq_ctrl = 0;
1660
1661         /* fill in our indirect SSID IE */
1662         /* ...next IE... */
1663
1664         left -= 2;
1665         if (left < 0)
1666                 return 0;
1667         len += 2;
1668         pos = &(frame->u.probe_req.variable[0]);
1669         *pos++ = WLAN_EID_SSID;
1670         *pos++ = 0;
1671
1672         /* fill in our direct SSID IE... */
1673         if (is_direct) {
1674                 /* ...next IE... */
1675                 left -= 2 + priv->essid_len;
1676                 if (left < 0)
1677                         return 0;
1678                 /* ... fill it in... */
1679                 *pos++ = WLAN_EID_SSID;
1680                 *pos++ = priv->essid_len;
1681                 memcpy(pos, priv->essid, priv->essid_len);
1682                 pos += priv->essid_len;
1683                 len += 2 + priv->essid_len;
1684         }
1685
1686         /* fill in supported rate */
1687         /* ...next IE... */
1688         left -= 2;
1689         if (left < 0)
1690                 return 0;
1691
1692         /* ... fill it in... */
1693         *pos++ = WLAN_EID_SUPP_RATES;
1694         *pos = 0;
1695
1696         priv->active_rate = priv->rates_mask;
1697         active_rates = priv->active_rate;
1698         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1699
1700         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1701         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1702                         priv->active_rate_basic, &left);
1703         active_rates &= ~ret_rates;
1704
1705         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1706                                  priv->active_rate_basic, &left);
1707         active_rates &= ~ret_rates;
1708
1709         len += 2 + *pos;
1710         pos += (*pos) + 1;
1711         if (active_rates == 0)
1712                 goto fill_end;
1713
1714         /* fill in supported extended rate */
1715         /* ...next IE... */
1716         left -= 2;
1717         if (left < 0)
1718                 return 0;
1719         /* ... fill it in... */
1720         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1721         *pos = 0;
1722         iwl3945_supported_rate_to_ie(pos, active_rates,
1723                                  priv->active_rate_basic, &left);
1724         if (*pos > 0)
1725                 len += 2 + *pos;
1726
1727  fill_end:
1728         return (u16)len;
1729 }
1730
1731 /*
1732  * QoS  support
1733 */
1734 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1735                                        struct iwl3945_qosparam_cmd *qos)
1736 {
1737
1738         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1739                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1740 }
1741
1742 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1743 {
1744         u16 cw_min = 15;
1745         u16 cw_max = 1023;
1746         u8 aifs = 2;
1747         u8 is_legacy = 0;
1748         unsigned long flags;
1749         int i;
1750
1751         spin_lock_irqsave(&priv->lock, flags);
1752         priv->qos_data.qos_active = 0;
1753
1754         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1755                 if (priv->qos_data.qos_enable)
1756                         priv->qos_data.qos_active = 1;
1757                 if (!(priv->active_rate & 0xfff0)) {
1758                         cw_min = 31;
1759                         is_legacy = 1;
1760                 }
1761         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1762                 if (priv->qos_data.qos_enable)
1763                         priv->qos_data.qos_active = 1;
1764         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1765                 cw_min = 31;
1766                 is_legacy = 1;
1767         }
1768
1769         if (priv->qos_data.qos_active)
1770                 aifs = 3;
1771
1772         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1773         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1774         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1775         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1776         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1777
1778         if (priv->qos_data.qos_active) {
1779                 i = 1;
1780                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1781                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1782                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1783                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1784                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1785
1786                 i = 2;
1787                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1788                         cpu_to_le16((cw_min + 1) / 2 - 1);
1789                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1790                         cpu_to_le16(cw_max);
1791                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1792                 if (is_legacy)
1793                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1794                                 cpu_to_le16(6016);
1795                 else
1796                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1797                                 cpu_to_le16(3008);
1798                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1799
1800                 i = 3;
1801                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1802                         cpu_to_le16((cw_min + 1) / 4 - 1);
1803                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1804                         cpu_to_le16((cw_max + 1) / 2 - 1);
1805                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1806                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1807                 if (is_legacy)
1808                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1809                                 cpu_to_le16(3264);
1810                 else
1811                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1812                                 cpu_to_le16(1504);
1813         } else {
1814                 for (i = 1; i < 4; i++) {
1815                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1816                                 cpu_to_le16(cw_min);
1817                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1818                                 cpu_to_le16(cw_max);
1819                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1820                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1821                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1822                 }
1823         }
1824         IWL_DEBUG_QOS("set QoS to default \n");
1825
1826         spin_unlock_irqrestore(&priv->lock, flags);
1827 }
1828
1829 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
1830 {
1831         unsigned long flags;
1832
1833         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1834                 return;
1835
1836         if (!priv->qos_data.qos_enable)
1837                 return;
1838
1839         spin_lock_irqsave(&priv->lock, flags);
1840         priv->qos_data.def_qos_parm.qos_flags = 0;
1841
1842         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1843             !priv->qos_data.qos_cap.q_AP.txop_request)
1844                 priv->qos_data.def_qos_parm.qos_flags |=
1845                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1846
1847         if (priv->qos_data.qos_active)
1848                 priv->qos_data.def_qos_parm.qos_flags |=
1849                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1850
1851         spin_unlock_irqrestore(&priv->lock, flags);
1852
1853         if (force || iwl3945_is_associated(priv)) {
1854                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1855                               priv->qos_data.qos_active);
1856
1857                 iwl3945_send_qos_params_command(priv,
1858                                 &(priv->qos_data.def_qos_parm));
1859         }
1860 }
1861
1862 /*
1863  * Power management (not Tx power!) functions
1864  */
1865 #define MSEC_TO_USEC 1024
1866
1867 #define NOSLP __constant_cpu_to_le32(0)
1868 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
1869 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1870 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1871                                      __constant_cpu_to_le32(X1), \
1872                                      __constant_cpu_to_le32(X2), \
1873                                      __constant_cpu_to_le32(X3), \
1874                                      __constant_cpu_to_le32(X4)}
1875
1876
1877 /* default power management (not Tx power) table values */
1878 /* for tim  0-10 */
1879 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
1880         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1881         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1882         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1883         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1884         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1885         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1886 };
1887
1888 /* for tim > 10 */
1889 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
1890         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1891         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1892                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1893         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1894                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1895         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1896                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1897         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1898         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1899                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1900 };
1901
1902 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
1903 {
1904         int rc = 0, i;
1905         struct iwl3945_power_mgr *pow_data;
1906         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
1907         u16 pci_pm;
1908
1909         IWL_DEBUG_POWER("Initialize power \n");
1910
1911         pow_data = &(priv->power_data);
1912
1913         memset(pow_data, 0, sizeof(*pow_data));
1914
1915         pow_data->active_index = IWL_POWER_RANGE_0;
1916         pow_data->dtim_val = 0xffff;
1917
1918         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1919         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1920
1921         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1922         if (rc != 0)
1923                 return 0;
1924         else {
1925                 struct iwl3945_powertable_cmd *cmd;
1926
1927                 IWL_DEBUG_POWER("adjust power command flags\n");
1928
1929                 for (i = 0; i < IWL_POWER_AC; i++) {
1930                         cmd = &pow_data->pwr_range_0[i].cmd;
1931
1932                         if (pci_pm & 0x1)
1933                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1934                         else
1935                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1936                 }
1937         }
1938         return rc;
1939 }
1940
1941 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
1942                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
1943 {
1944         int rc = 0, i;
1945         u8 skip;
1946         u32 max_sleep = 0;
1947         struct iwl3945_power_vec_entry *range;
1948         u8 period = 0;
1949         struct iwl3945_power_mgr *pow_data;
1950
1951         if (mode > IWL_POWER_INDEX_5) {
1952                 IWL_DEBUG_POWER("Error invalid power mode \n");
1953                 return -1;
1954         }
1955         pow_data = &(priv->power_data);
1956
1957         if (pow_data->active_index == IWL_POWER_RANGE_0)
1958                 range = &pow_data->pwr_range_0[0];
1959         else
1960                 range = &pow_data->pwr_range_1[1];
1961
1962         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1963
1964 #ifdef IWL_MAC80211_DISABLE
1965         if (priv->assoc_network != NULL) {
1966                 unsigned long flags;
1967
1968                 period = priv->assoc_network->tim.tim_period;
1969         }
1970 #endif  /*IWL_MAC80211_DISABLE */
1971         skip = range[mode].no_dtim;
1972
1973         if (period == 0) {
1974                 period = 1;
1975                 skip = 0;
1976         }
1977
1978         if (skip == 0) {
1979                 max_sleep = period;
1980                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1981         } else {
1982                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1983                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1984                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1985         }
1986
1987         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1988                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1989                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1990         }
1991
1992         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1993         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1994         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1995         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1996                         le32_to_cpu(cmd->sleep_interval[0]),
1997                         le32_to_cpu(cmd->sleep_interval[1]),
1998                         le32_to_cpu(cmd->sleep_interval[2]),
1999                         le32_to_cpu(cmd->sleep_interval[3]),
2000                         le32_to_cpu(cmd->sleep_interval[4]));
2001
2002         return rc;
2003 }
2004
2005 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2006 {
2007         u32 uninitialized_var(final_mode);
2008         int rc;
2009         struct iwl3945_powertable_cmd cmd;
2010
2011         /* If on battery, set to 3,
2012          * if plugged into AC power, set to CAM ("continuously aware mode"),
2013          * else user level */
2014         switch (mode) {
2015         case IWL_POWER_BATTERY:
2016                 final_mode = IWL_POWER_INDEX_3;
2017                 break;
2018         case IWL_POWER_AC:
2019                 final_mode = IWL_POWER_MODE_CAM;
2020                 break;
2021         default:
2022                 final_mode = mode;
2023                 break;
2024         }
2025
2026         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2027
2028         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2029
2030         if (final_mode == IWL_POWER_MODE_CAM)
2031                 clear_bit(STATUS_POWER_PMI, &priv->status);
2032         else
2033                 set_bit(STATUS_POWER_PMI, &priv->status);
2034
2035         return rc;
2036 }
2037
2038 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2039 {
2040         /* Filter incoming packets to determine if they are targeted toward
2041          * this network, discarding packets coming from ourselves */
2042         switch (priv->iw_mode) {
2043         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2044                 /* packets from our adapter are dropped (echo) */
2045                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2046                         return 0;
2047                 /* {broad,multi}cast packets to our IBSS go through */
2048                 if (is_multicast_ether_addr(header->addr1))
2049                         return !compare_ether_addr(header->addr3, priv->bssid);
2050                 /* packets to our adapter go through */
2051                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2052         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2053                 /* packets from our adapter are dropped (echo) */
2054                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2055                         return 0;
2056                 /* {broad,multi}cast packets to our BSS go through */
2057                 if (is_multicast_ether_addr(header->addr1))
2058                         return !compare_ether_addr(header->addr2, priv->bssid);
2059                 /* packets to our adapter go through */
2060                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2061         default:
2062                 return 1;
2063         }
2064
2065         return 1;
2066 }
2067
2068 /**
2069  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2070  *
2071  * NOTE: priv->mutex is not required before calling this function
2072  */
2073 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2074 {
2075         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2076                 clear_bit(STATUS_SCANNING, &priv->status);
2077                 return 0;
2078         }
2079
2080         if (test_bit(STATUS_SCANNING, &priv->status)) {
2081                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2082                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2083                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2084                         queue_work(priv->workqueue, &priv->abort_scan);
2085
2086                 } else
2087                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2088
2089                 return test_bit(STATUS_SCANNING, &priv->status);
2090         }
2091
2092         return 0;
2093 }
2094
2095 /**
2096  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2097  * @ms: amount of time to wait (in milliseconds) for scan to abort
2098  *
2099  * NOTE: priv->mutex must be held before calling this function
2100  */
2101 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2102 {
2103         unsigned long now = jiffies;
2104         int ret;
2105
2106         ret = iwl3945_scan_cancel(priv);
2107         if (ret && ms) {
2108                 mutex_unlock(&priv->mutex);
2109                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2110                                 test_bit(STATUS_SCANNING, &priv->status))
2111                         msleep(1);
2112                 mutex_lock(&priv->mutex);
2113
2114                 return test_bit(STATUS_SCANNING, &priv->status);
2115         }
2116
2117         return ret;
2118 }
2119
2120 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2121 {
2122         /* Reset ieee stats */
2123
2124         /* We don't reset the net_device_stats (ieee->stats) on
2125          * re-association */
2126
2127         priv->last_seq_num = -1;
2128         priv->last_frag_num = -1;
2129         priv->last_packet_time = 0;
2130
2131         iwl3945_scan_cancel(priv);
2132 }
2133
2134 #define MAX_UCODE_BEACON_INTERVAL       1024
2135 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2136
2137 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2138 {
2139         u16 new_val = 0;
2140         u16 beacon_factor = 0;
2141
2142         beacon_factor =
2143             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2144                 / MAX_UCODE_BEACON_INTERVAL;
2145         new_val = beacon_val / beacon_factor;
2146
2147         return cpu_to_le16(new_val);
2148 }
2149
2150 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2151 {
2152         u64 interval_tm_unit;
2153         u64 tsf, result;
2154         unsigned long flags;
2155         struct ieee80211_conf *conf = NULL;
2156         u16 beacon_int = 0;
2157
2158         conf = ieee80211_get_hw_conf(priv->hw);
2159
2160         spin_lock_irqsave(&priv->lock, flags);
2161         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2162         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2163
2164         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2165
2166         tsf = priv->timestamp1;
2167         tsf = ((tsf << 32) | priv->timestamp0);
2168
2169         beacon_int = priv->beacon_int;
2170         spin_unlock_irqrestore(&priv->lock, flags);
2171
2172         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2173                 if (beacon_int == 0) {
2174                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2175                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2176                 } else {
2177                         priv->rxon_timing.beacon_interval =
2178                                 cpu_to_le16(beacon_int);
2179                         priv->rxon_timing.beacon_interval =
2180                             iwl3945_adjust_beacon_interval(
2181                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2182                 }
2183
2184                 priv->rxon_timing.atim_window = 0;
2185         } else {
2186                 priv->rxon_timing.beacon_interval =
2187                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2188                 /* TODO: we need to get atim_window from upper stack
2189                  * for now we set to 0 */
2190                 priv->rxon_timing.atim_window = 0;
2191         }
2192
2193         interval_tm_unit =
2194                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2195         result = do_div(tsf, interval_tm_unit);
2196         priv->rxon_timing.beacon_init_val =
2197             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2198
2199         IWL_DEBUG_ASSOC
2200             ("beacon interval %d beacon timer %d beacon tim %d\n",
2201                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2202                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2203                 le16_to_cpu(priv->rxon_timing.atim_window));
2204 }
2205
2206 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2207 {
2208         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2209                 IWL_ERROR("APs don't scan.\n");
2210                 return 0;
2211         }
2212
2213         if (!iwl3945_is_ready_rf(priv)) {
2214                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2215                 return -EIO;
2216         }
2217
2218         if (test_bit(STATUS_SCANNING, &priv->status)) {
2219                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2220                 return -EAGAIN;
2221         }
2222
2223         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2224                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2225                                "Queuing.\n");
2226                 return -EAGAIN;
2227         }
2228
2229         IWL_DEBUG_INFO("Starting scan...\n");
2230         priv->scan_bands = 2;
2231         set_bit(STATUS_SCANNING, &priv->status);
2232         priv->scan_start = jiffies;
2233         priv->scan_pass_start = priv->scan_start;
2234
2235         queue_work(priv->workqueue, &priv->request_scan);
2236
2237         return 0;
2238 }
2239
2240 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2241 {
2242         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2243
2244         if (hw_decrypt)
2245                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2246         else
2247                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2248
2249         return 0;
2250 }
2251
2252 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2253                                           enum ieee80211_band band)
2254 {
2255         if (band == IEEE80211_BAND_5GHZ) {
2256                 priv->staging_rxon.flags &=
2257                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2258                       | RXON_FLG_CCK_MSK);
2259                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2260         } else {
2261                 /* Copied from iwl3945_bg_post_associate() */
2262                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2263                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2264                 else
2265                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2266
2267                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2268                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2269
2270                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2271                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2272                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2273         }
2274 }
2275
2276 /*
2277  * initialize rxon structure with default values from eeprom
2278  */
2279 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2280 {
2281         const struct iwl3945_channel_info *ch_info;
2282
2283         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2284
2285         switch (priv->iw_mode) {
2286         case IEEE80211_IF_TYPE_AP:
2287                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2288                 break;
2289
2290         case IEEE80211_IF_TYPE_STA:
2291                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2292                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2293                 break;
2294
2295         case IEEE80211_IF_TYPE_IBSS:
2296                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2297                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2298                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2299                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2300                 break;
2301
2302         case IEEE80211_IF_TYPE_MNTR:
2303                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2304                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2305                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2306                 break;
2307         default:
2308                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
2309                 break;
2310         }
2311
2312 #if 0
2313         /* TODO:  Figure out when short_preamble would be set and cache from
2314          * that */
2315         if (!hw_to_local(priv->hw)->short_preamble)
2316                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2317         else
2318                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2319 #endif
2320
2321         ch_info = iwl3945_get_channel_info(priv, priv->band,
2322                                        le16_to_cpu(priv->staging_rxon.channel));
2323
2324         if (!ch_info)
2325                 ch_info = &priv->channel_info[0];
2326
2327         /*
2328          * in some case A channels are all non IBSS
2329          * in this case force B/G channel
2330          */
2331         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2332             !(is_channel_ibss(ch_info)))
2333                 ch_info = &priv->channel_info[0];
2334
2335         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2336         if (is_channel_a_band(ch_info))
2337                 priv->band = IEEE80211_BAND_5GHZ;
2338         else
2339                 priv->band = IEEE80211_BAND_2GHZ;
2340
2341         iwl3945_set_flags_for_phymode(priv, priv->band);
2342
2343         priv->staging_rxon.ofdm_basic_rates =
2344             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2345         priv->staging_rxon.cck_basic_rates =
2346             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2347 }
2348
2349 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2350 {
2351         if (mode == IEEE80211_IF_TYPE_IBSS) {
2352                 const struct iwl3945_channel_info *ch_info;
2353
2354                 ch_info = iwl3945_get_channel_info(priv,
2355                         priv->band,
2356                         le16_to_cpu(priv->staging_rxon.channel));
2357
2358                 if (!ch_info || !is_channel_ibss(ch_info)) {
2359                         IWL_ERROR("channel %d not IBSS channel\n",
2360                                   le16_to_cpu(priv->staging_rxon.channel));
2361                         return -EINVAL;
2362                 }
2363         }
2364
2365         priv->iw_mode = mode;
2366
2367         iwl3945_connection_init_rx_config(priv);
2368         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2369
2370         iwl3945_clear_stations_table(priv);
2371
2372         /* dont commit rxon if rf-kill is on*/
2373         if (!iwl3945_is_ready_rf(priv))
2374                 return -EAGAIN;
2375
2376         cancel_delayed_work(&priv->scan_check);
2377         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2378                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2379                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2380                 return -EAGAIN;
2381         }
2382
2383         iwl3945_commit_rxon(priv);
2384
2385         return 0;
2386 }
2387
2388 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2389                                       struct ieee80211_tx_control *ctl,
2390                                       struct iwl3945_cmd *cmd,
2391                                       struct sk_buff *skb_frag,
2392                                       int last_frag)
2393 {
2394         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2395
2396         switch (keyinfo->alg) {
2397         case ALG_CCMP:
2398                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2399                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2400                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2401                 break;
2402
2403         case ALG_TKIP:
2404 #if 0
2405                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2406
2407                 if (last_frag)
2408                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2409                                8);
2410                 else
2411                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2412 #endif
2413                 break;
2414
2415         case ALG_WEP:
2416                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2417                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2418
2419                 if (keyinfo->keylen == 13)
2420                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2421
2422                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2423
2424                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2425                              "with key %d\n", ctl->key_idx);
2426                 break;
2427
2428         default:
2429                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2430                 break;
2431         }
2432 }
2433
2434 /*
2435  * handle build REPLY_TX command notification.
2436  */
2437 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2438                                   struct iwl3945_cmd *cmd,
2439                                   struct ieee80211_tx_control *ctrl,
2440                                   struct ieee80211_hdr *hdr,
2441                                   int is_unicast, u8 std_id)
2442 {
2443         __le16 *qc;
2444         u16 fc = le16_to_cpu(hdr->frame_control);
2445         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2446
2447         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2448         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2449                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2450                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2451                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2452                 if (ieee80211_is_probe_response(fc) &&
2453                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2454                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2455         } else {
2456                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2457                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2458         }
2459
2460         cmd->cmd.tx.sta_id = std_id;
2461         if (ieee80211_get_morefrag(hdr))
2462                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2463
2464         qc = ieee80211_get_qos_ctrl(hdr);
2465         if (qc) {
2466                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2467                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2468         } else
2469                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2470
2471         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2472                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2473                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2474         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2475                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2476                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2477         }
2478
2479         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2480                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2481
2482         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2483         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2484                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2485                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2486                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2487                 else
2488                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2489         } else {
2490                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2491 #ifdef CONFIG_IWL3945_LEDS
2492                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2493 #endif
2494         }
2495
2496         cmd->cmd.tx.driver_txop = 0;
2497         cmd->cmd.tx.tx_flags = tx_flags;
2498         cmd->cmd.tx.next_frame_len = 0;
2499 }
2500
2501 /**
2502  * iwl3945_get_sta_id - Find station's index within station table
2503  */
2504 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2505 {
2506         int sta_id;
2507         u16 fc = le16_to_cpu(hdr->frame_control);
2508
2509         /* If this frame is broadcast or management, use broadcast station id */
2510         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2511             is_multicast_ether_addr(hdr->addr1))
2512                 return priv->hw_setting.bcast_sta_id;
2513
2514         switch (priv->iw_mode) {
2515
2516         /* If we are a client station in a BSS network, use the special
2517          * AP station entry (that's the only station we communicate with) */
2518         case IEEE80211_IF_TYPE_STA:
2519                 return IWL_AP_ID;
2520
2521         /* If we are an AP, then find the station, or use BCAST */
2522         case IEEE80211_IF_TYPE_AP:
2523                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2524                 if (sta_id != IWL_INVALID_STATION)
2525                         return sta_id;
2526                 return priv->hw_setting.bcast_sta_id;
2527
2528         /* If this frame is going out to an IBSS network, find the station,
2529          * or create a new station table entry */
2530         case IEEE80211_IF_TYPE_IBSS: {
2531                 DECLARE_MAC_BUF(mac);
2532
2533                 /* Create new station table entry */
2534                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2535                 if (sta_id != IWL_INVALID_STATION)
2536                         return sta_id;
2537
2538                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2539
2540                 if (sta_id != IWL_INVALID_STATION)
2541                         return sta_id;
2542
2543                 IWL_DEBUG_DROP("Station %s not in station map. "
2544                                "Defaulting to broadcast...\n",
2545                                print_mac(mac, hdr->addr1));
2546                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2547                 return priv->hw_setting.bcast_sta_id;
2548         }
2549         default:
2550                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2551                 return priv->hw_setting.bcast_sta_id;
2552         }
2553 }
2554
2555 /*
2556  * start REPLY_TX command process
2557  */
2558 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2559                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2560 {
2561         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2562         struct iwl3945_tfd_frame *tfd;
2563         u32 *control_flags;
2564         int txq_id = ctl->queue;
2565         struct iwl3945_tx_queue *txq = NULL;
2566         struct iwl3945_queue *q = NULL;
2567         dma_addr_t phys_addr;
2568         dma_addr_t txcmd_phys;
2569         struct iwl3945_cmd *out_cmd = NULL;
2570         u16 len, idx, len_org;
2571         u8 id, hdr_len, unicast;
2572         u8 sta_id;
2573         u16 seq_number = 0;
2574         u16 fc;
2575         __le16 *qc;
2576         u8 wait_write_ptr = 0;
2577         unsigned long flags;
2578         int rc;
2579
2580         spin_lock_irqsave(&priv->lock, flags);
2581         if (iwl3945_is_rfkill(priv)) {
2582                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2583                 goto drop_unlock;
2584         }
2585
2586         if (!priv->vif) {
2587                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2588                 goto drop_unlock;
2589         }
2590
2591         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2592                 IWL_ERROR("ERROR: No TX rate available.\n");
2593                 goto drop_unlock;
2594         }
2595
2596         unicast = !is_multicast_ether_addr(hdr->addr1);
2597         id = 0;
2598
2599         fc = le16_to_cpu(hdr->frame_control);
2600
2601 #ifdef CONFIG_IWL3945_DEBUG
2602         if (ieee80211_is_auth(fc))
2603                 IWL_DEBUG_TX("Sending AUTH frame\n");
2604         else if (ieee80211_is_assoc_request(fc))
2605                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2606         else if (ieee80211_is_reassoc_request(fc))
2607                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2608 #endif
2609
2610         /* drop all data frame if we are not associated */
2611         if ((!iwl3945_is_associated(priv) ||
2612              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id)) &&
2613             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2614                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2615                 goto drop_unlock;
2616         }
2617
2618         spin_unlock_irqrestore(&priv->lock, flags);
2619
2620         hdr_len = ieee80211_get_hdrlen(fc);
2621
2622         /* Find (or create) index into station table for destination station */
2623         sta_id = iwl3945_get_sta_id(priv, hdr);
2624         if (sta_id == IWL_INVALID_STATION) {
2625                 DECLARE_MAC_BUF(mac);
2626
2627                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2628                                print_mac(mac, hdr->addr1));
2629                 goto drop;
2630         }
2631
2632         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2633
2634         qc = ieee80211_get_qos_ctrl(hdr);
2635         if (qc) {
2636                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2637                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2638                                 IEEE80211_SCTL_SEQ;
2639                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2640                         (hdr->seq_ctrl &
2641                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2642                 seq_number += 0x10;
2643         }
2644
2645         /* Descriptor for chosen Tx queue */
2646         txq = &priv->txq[txq_id];
2647         q = &txq->q;
2648
2649         spin_lock_irqsave(&priv->lock, flags);
2650
2651         /* Set up first empty TFD within this queue's circular TFD buffer */
2652         tfd = &txq->bd[q->write_ptr];
2653         memset(tfd, 0, sizeof(*tfd));
2654         control_flags = (u32 *) tfd;
2655         idx = get_cmd_index(q, q->write_ptr, 0);
2656
2657         /* Set up driver data for this TFD */
2658         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2659         txq->txb[q->write_ptr].skb[0] = skb;
2660         memcpy(&(txq->txb[q->write_ptr].status.control),
2661                ctl, sizeof(struct ieee80211_tx_control));
2662
2663         /* Init first empty entry in queue's array of Tx/cmd buffers */
2664         out_cmd = &txq->cmd[idx];
2665         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2666         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2667
2668         /*
2669          * Set up the Tx-command (not MAC!) header.
2670          * Store the chosen Tx queue and TFD index within the sequence field;
2671          * after Tx, uCode's Tx response will return this value so driver can
2672          * locate the frame within the tx queue and do post-tx processing.
2673          */
2674         out_cmd->hdr.cmd = REPLY_TX;
2675         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2676                                 INDEX_TO_SEQ(q->write_ptr)));
2677
2678         /* Copy MAC header from skb into command buffer */
2679         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2680
2681         /*
2682          * Use the first empty entry in this queue's command buffer array
2683          * to contain the Tx command and MAC header concatenated together
2684          * (payload data will be in another buffer).
2685          * Size of this varies, due to varying MAC header length.
2686          * If end is not dword aligned, we'll have 2 extra bytes at the end
2687          * of the MAC header (device reads on dword boundaries).
2688          * We'll tell device about this padding later.
2689          */
2690         len = priv->hw_setting.tx_cmd_len +
2691                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2692
2693         len_org = len;
2694         len = (len + 3) & ~3;
2695
2696         if (len_org != len)
2697                 len_org = 1;
2698         else
2699                 len_org = 0;
2700
2701         /* Physical address of this Tx command's header (not MAC header!),
2702          * within command buffer array. */
2703         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2704                      offsetof(struct iwl3945_cmd, hdr);
2705
2706         /* Add buffer containing Tx command and MAC(!) header to TFD's
2707          * first entry */
2708         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2709
2710         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2711                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2712
2713         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2714          * if any (802.11 null frames have no payload). */
2715         len = skb->len - hdr_len;
2716         if (len) {
2717                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2718                                            len, PCI_DMA_TODEVICE);
2719                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2720         }
2721
2722         if (!len)
2723                 /* If there is no payload, then we use only one Tx buffer */
2724                 *control_flags = TFD_CTL_COUNT_SET(1);
2725         else
2726                 /* Else use 2 buffers.
2727                  * Tell 3945 about any padding after MAC header */
2728                 *control_flags = TFD_CTL_COUNT_SET(2) |
2729                         TFD_CTL_PAD_SET(U32_PAD(len));
2730
2731         /* Total # bytes to be transmitted */
2732         len = (u16)skb->len;
2733         out_cmd->cmd.tx.len = cpu_to_le16(len);
2734
2735         /* TODO need this for burst mode later on */
2736         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2737
2738         /* set is_hcca to 0; it probably will never be implemented */
2739         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2740
2741         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2742         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2743
2744         if (!ieee80211_get_morefrag(hdr)) {
2745                 txq->need_update = 1;
2746                 if (qc) {
2747                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2748                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2749                 }
2750         } else {
2751                 wait_write_ptr = 1;
2752                 txq->need_update = 0;
2753         }
2754
2755         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2756                            sizeof(out_cmd->cmd.tx));
2757
2758         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2759                            ieee80211_get_hdrlen(fc));
2760
2761         /* Tell device the write index *just past* this latest filled TFD */
2762         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2763         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2764         spin_unlock_irqrestore(&priv->lock, flags);
2765
2766         if (rc)
2767                 return rc;
2768
2769         if ((iwl3945_queue_space(q) < q->high_mark)
2770             && priv->mac80211_registered) {
2771                 if (wait_write_ptr) {
2772                         spin_lock_irqsave(&priv->lock, flags);
2773                         txq->need_update = 1;
2774                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2775                         spin_unlock_irqrestore(&priv->lock, flags);
2776                 }
2777
2778                 ieee80211_stop_queue(priv->hw, ctl->queue);
2779         }
2780
2781         return 0;
2782
2783 drop_unlock:
2784         spin_unlock_irqrestore(&priv->lock, flags);
2785 drop:
2786         return -1;
2787 }
2788
2789 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2790 {
2791         const struct ieee80211_supported_band *sband = NULL;
2792         struct ieee80211_rate *rate;
2793         int i;
2794
2795         sband = iwl3945_get_band(priv, priv->band);
2796         if (!sband) {
2797                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2798                 return;
2799         }
2800
2801         priv->active_rate = 0;
2802         priv->active_rate_basic = 0;
2803
2804         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2805                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2806
2807         for (i = 0; i < sband->n_bitrates; i++) {
2808                 rate = &sband->bitrates[i];
2809                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2810                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2811                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2812                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2813                         priv->active_rate |= (1 << rate->hw_value);
2814                 }
2815         }
2816
2817         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2818                        priv->active_rate, priv->active_rate_basic);
2819
2820         /*
2821          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2822          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2823          * OFDM
2824          */
2825         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2826                 priv->staging_rxon.cck_basic_rates =
2827                     ((priv->active_rate_basic &
2828                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2829         else
2830                 priv->staging_rxon.cck_basic_rates =
2831                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2832
2833         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2834                 priv->staging_rxon.ofdm_basic_rates =
2835                     ((priv->active_rate_basic &
2836                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2837                       IWL_FIRST_OFDM_RATE) & 0xFF;
2838         else
2839                 priv->staging_rxon.ofdm_basic_rates =
2840                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2841 }
2842
2843 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2844 {
2845         unsigned long flags;
2846
2847         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2848                 return;
2849
2850         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2851                           disable_radio ? "OFF" : "ON");
2852
2853         if (disable_radio) {
2854                 iwl3945_scan_cancel(priv);
2855                 /* FIXME: This is a workaround for AP */
2856                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2857                         spin_lock_irqsave(&priv->lock, flags);
2858                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2859                                     CSR_UCODE_SW_BIT_RFKILL);
2860                         spin_unlock_irqrestore(&priv->lock, flags);
2861                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2862                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2863                 }
2864                 return;
2865         }
2866
2867         spin_lock_irqsave(&priv->lock, flags);
2868         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2869
2870         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2871         spin_unlock_irqrestore(&priv->lock, flags);
2872
2873         /* wake up ucode */
2874         msleep(10);
2875
2876         spin_lock_irqsave(&priv->lock, flags);
2877         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2878         if (!iwl3945_grab_nic_access(priv))
2879                 iwl3945_release_nic_access(priv);
2880         spin_unlock_irqrestore(&priv->lock, flags);
2881
2882         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2883                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2884                                   "disabled by HW switch\n");
2885                 return;
2886         }
2887
2888         queue_work(priv->workqueue, &priv->restart);
2889         return;
2890 }
2891
2892 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2893                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2894 {
2895         u16 fc =
2896             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2897
2898         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2899                 return;
2900
2901         if (!(fc & IEEE80211_FCTL_PROTECTED))
2902                 return;
2903
2904         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2905         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2906         case RX_RES_STATUS_SEC_TYPE_TKIP:
2907                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2908                     RX_RES_STATUS_BAD_ICV_MIC)
2909                         stats->flag |= RX_FLAG_MMIC_ERROR;
2910         case RX_RES_STATUS_SEC_TYPE_WEP:
2911         case RX_RES_STATUS_SEC_TYPE_CCMP:
2912                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2913                     RX_RES_STATUS_DECRYPT_OK) {
2914                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2915                         stats->flag |= RX_FLAG_DECRYPTED;
2916                 }
2917                 break;
2918
2919         default:
2920                 break;
2921         }
2922 }
2923
2924 #define IWL_PACKET_RETRY_TIME HZ
2925
2926 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2927 {
2928         u16 sc = le16_to_cpu(header->seq_ctrl);
2929         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2930         u16 frag = sc & IEEE80211_SCTL_FRAG;
2931         u16 *last_seq, *last_frag;
2932         unsigned long *last_time;
2933
2934         switch (priv->iw_mode) {
2935         case IEEE80211_IF_TYPE_IBSS:{
2936                 struct list_head *p;
2937                 struct iwl3945_ibss_seq *entry = NULL;
2938                 u8 *mac = header->addr2;
2939                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2940
2941                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2942                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
2943                         if (!compare_ether_addr(entry->mac, mac))
2944                                 break;
2945                 }
2946                 if (p == &priv->ibss_mac_hash[index]) {
2947                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2948                         if (!entry) {
2949                                 IWL_ERROR("Cannot malloc new mac entry\n");
2950                                 return 0;
2951                         }
2952                         memcpy(entry->mac, mac, ETH_ALEN);
2953                         entry->seq_num = seq;
2954                         entry->frag_num = frag;
2955                         entry->packet_time = jiffies;
2956                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2957                         return 0;
2958                 }
2959                 last_seq = &entry->seq_num;
2960                 last_frag = &entry->frag_num;
2961                 last_time = &entry->packet_time;
2962                 break;
2963         }
2964         case IEEE80211_IF_TYPE_STA:
2965                 last_seq = &priv->last_seq_num;
2966                 last_frag = &priv->last_frag_num;
2967                 last_time = &priv->last_packet_time;
2968                 break;
2969         default:
2970                 return 0;
2971         }
2972         if ((*last_seq == seq) &&
2973             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2974                 if (*last_frag == frag)
2975                         goto drop;
2976                 if (*last_frag + 1 != frag)
2977                         /* out-of-order fragment */
2978                         goto drop;
2979         } else
2980                 *last_seq = seq;
2981
2982         *last_frag = frag;
2983         *last_time = jiffies;
2984         return 0;
2985
2986  drop:
2987         return 1;
2988 }
2989
2990 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2991
2992 #include "iwl-spectrum.h"
2993
2994 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2995 #define BEACON_TIME_MASK_HIGH   0xFF000000
2996 #define TIME_UNIT               1024
2997
2998 /*
2999  * extended beacon time format
3000  * time in usec will be changed into a 32-bit value in 8:24 format
3001  * the high 1 byte is the beacon counts
3002  * the lower 3 bytes is the time in usec within one beacon interval
3003  */
3004
3005 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3006 {
3007         u32 quot;
3008         u32 rem;
3009         u32 interval = beacon_interval * 1024;
3010
3011         if (!interval || !usec)
3012                 return 0;
3013
3014         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3015         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3016
3017         return (quot << 24) + rem;
3018 }
3019
3020 /* base is usually what we get from ucode with each received frame,
3021  * the same as HW timer counter counting down
3022  */
3023
3024 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3025 {
3026         u32 base_low = base & BEACON_TIME_MASK_LOW;
3027         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3028         u32 interval = beacon_interval * TIME_UNIT;
3029         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3030             (addon & BEACON_TIME_MASK_HIGH);
3031
3032         if (base_low > addon_low)
3033                 res += base_low - addon_low;
3034         else if (base_low < addon_low) {
3035                 res += interval + base_low - addon_low;
3036                 res += (1 << 24);
3037         } else
3038                 res += (1 << 24);
3039
3040         return cpu_to_le32(res);
3041 }
3042
3043 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3044                                struct ieee80211_measurement_params *params,
3045                                u8 type)
3046 {
3047         struct iwl3945_spectrum_cmd spectrum;
3048         struct iwl3945_rx_packet *res;
3049         struct iwl3945_host_cmd cmd = {
3050                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3051                 .data = (void *)&spectrum,
3052                 .meta.flags = CMD_WANT_SKB,
3053         };
3054         u32 add_time = le64_to_cpu(params->start_time);
3055         int rc;
3056         int spectrum_resp_status;
3057         int duration = le16_to_cpu(params->duration);
3058
3059         if (iwl3945_is_associated(priv))
3060                 add_time =
3061                     iwl3945_usecs_to_beacons(
3062                         le64_to_cpu(params->start_time) - priv->last_tsf,
3063                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3064
3065         memset(&spectrum, 0, sizeof(spectrum));
3066
3067         spectrum.channel_count = cpu_to_le16(1);
3068         spectrum.flags =
3069             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3070         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3071         cmd.len = sizeof(spectrum);
3072         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3073
3074         if (iwl3945_is_associated(priv))
3075                 spectrum.start_time =
3076                     iwl3945_add_beacon_time(priv->last_beacon_time,
3077                                 add_time,
3078                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3079         else
3080                 spectrum.start_time = 0;
3081
3082         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3083         spectrum.channels[0].channel = params->channel;
3084         spectrum.channels[0].type = type;
3085         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3086                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3087                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3088
3089         rc = iwl3945_send_cmd_sync(priv, &cmd);
3090         if (rc)
3091                 return rc;
3092
3093         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3094         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3095                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3096                 rc = -EIO;
3097         }
3098
3099         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3100         switch (spectrum_resp_status) {
3101         case 0:         /* Command will be handled */
3102                 if (res->u.spectrum.id != 0xff) {
3103                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3104                                                 res->u.spectrum.id);
3105                         priv->measurement_status &= ~MEASUREMENT_READY;
3106                 }
3107                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3108                 rc = 0;
3109                 break;
3110
3111         case 1:         /* Command will not be handled */
3112                 rc = -EAGAIN;
3113                 break;
3114         }
3115
3116         dev_kfree_skb_any(cmd.meta.u.skb);
3117
3118         return rc;
3119 }
3120 #endif
3121
3122 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3123                                struct iwl3945_rx_mem_buffer *rxb)
3124 {
3125         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3126         struct iwl3945_alive_resp *palive;
3127         struct delayed_work *pwork;
3128
3129         palive = &pkt->u.alive_frame;
3130
3131         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3132                        "0x%01X 0x%01X\n",
3133                        palive->is_valid, palive->ver_type,
3134                        palive->ver_subtype);
3135
3136         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3137                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3138                 memcpy(&priv->card_alive_init,
3139                        &pkt->u.alive_frame,
3140                        sizeof(struct iwl3945_init_alive_resp));
3141                 pwork = &priv->init_alive_start;
3142         } else {
3143                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3144                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3145                        sizeof(struct iwl3945_alive_resp));
3146                 pwork = &priv->alive_start;
3147                 iwl3945_disable_events(priv);
3148         }
3149
3150         /* We delay the ALIVE response by 5ms to
3151          * give the HW RF Kill time to activate... */
3152         if (palive->is_valid == UCODE_VALID_OK)
3153                 queue_delayed_work(priv->workqueue, pwork,
3154                                    msecs_to_jiffies(5));
3155         else
3156                 IWL_WARNING("uCode did not respond OK.\n");
3157 }
3158
3159 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3160                                  struct iwl3945_rx_mem_buffer *rxb)
3161 {
3162         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3163
3164         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3165         return;
3166 }
3167
3168 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3169                                struct iwl3945_rx_mem_buffer *rxb)
3170 {
3171         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3172
3173         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3174                 "seq 0x%04X ser 0x%08X\n",
3175                 le32_to_cpu(pkt->u.err_resp.error_type),
3176                 get_cmd_string(pkt->u.err_resp.cmd_id),
3177                 pkt->u.err_resp.cmd_id,
3178                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3179                 le32_to_cpu(pkt->u.err_resp.error_info));
3180 }
3181
3182 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3183
3184 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3185 {
3186         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3187         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3188         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3189         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3190                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3191         rxon->channel = csa->channel;
3192         priv->staging_rxon.channel = csa->channel;
3193 }
3194
3195 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3196                                           struct iwl3945_rx_mem_buffer *rxb)
3197 {
3198 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3199         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3200         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3201
3202         if (!report->state) {
3203                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3204                           "Spectrum Measure Notification: Start\n");
3205                 return;
3206         }
3207
3208         memcpy(&priv->measure_report, report, sizeof(*report));
3209         priv->measurement_status |= MEASUREMENT_READY;
3210 #endif
3211 }
3212
3213 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3214                                   struct iwl3945_rx_mem_buffer *rxb)
3215 {
3216 #ifdef CONFIG_IWL3945_DEBUG
3217         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3218         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3219         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3220                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3221 #endif
3222 }
3223
3224 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3225                                              struct iwl3945_rx_mem_buffer *rxb)
3226 {
3227         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3228         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3229                         "notification for %s:\n",
3230                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3231         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3232 }
3233
3234 static void iwl3945_bg_beacon_update(struct work_struct *work)
3235 {
3236         struct iwl3945_priv *priv =
3237                 container_of(work, struct iwl3945_priv, beacon_update);
3238         struct sk_buff *beacon;
3239
3240         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3241         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3242
3243         if (!beacon) {
3244                 IWL_ERROR("update beacon failed\n");
3245                 return;
3246         }
3247
3248         mutex_lock(&priv->mutex);
3249         /* new beacon skb is allocated every time; dispose previous.*/
3250         if (priv->ibss_beacon)
3251                 dev_kfree_skb(priv->ibss_beacon);
3252
3253         priv->ibss_beacon = beacon;
3254         mutex_unlock(&priv->mutex);
3255
3256         iwl3945_send_beacon_cmd(priv);
3257 }
3258
3259 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3260                                 struct iwl3945_rx_mem_buffer *rxb)
3261 {
3262 #ifdef CONFIG_IWL3945_DEBUG
3263         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3264         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3265         u8 rate = beacon->beacon_notify_hdr.rate;
3266
3267         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3268                 "tsf %d %d rate %d\n",
3269                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3270                 beacon->beacon_notify_hdr.failure_frame,
3271                 le32_to_cpu(beacon->ibss_mgr_status),
3272                 le32_to_cpu(beacon->high_tsf),
3273                 le32_to_cpu(beacon->low_tsf), rate);
3274 #endif
3275
3276         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3277             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3278                 queue_work(priv->workqueue, &priv->beacon_update);
3279 }
3280
3281 /* Service response to REPLY_SCAN_CMD (0x80) */
3282 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3283                               struct iwl3945_rx_mem_buffer *rxb)
3284 {
3285 #ifdef CONFIG_IWL3945_DEBUG
3286         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3287         struct iwl3945_scanreq_notification *notif =
3288             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3289
3290         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3291 #endif
3292 }
3293
3294 /* Service SCAN_START_NOTIFICATION (0x82) */
3295 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3296                                     struct iwl3945_rx_mem_buffer *rxb)
3297 {
3298         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3299         struct iwl3945_scanstart_notification *notif =
3300             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3301         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3302         IWL_DEBUG_SCAN("Scan start: "
3303                        "%d [802.11%s] "
3304                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3305                        notif->channel,
3306                        notif->band ? "bg" : "a",
3307                        notif->tsf_high,
3308                        notif->tsf_low, notif->status, notif->beacon_timer);
3309 }
3310
3311 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3312 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3313                                       struct iwl3945_rx_mem_buffer *rxb)
3314 {
3315         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3316         struct iwl3945_scanresults_notification *notif =
3317             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3318
3319         IWL_DEBUG_SCAN("Scan ch.res: "
3320                        "%d [802.11%s] "
3321                        "(TSF: 0x%08X:%08X) - %d "
3322                        "elapsed=%lu usec (%dms since last)\n",
3323                        notif->channel,
3324                        notif->band ? "bg" : "a",
3325                        le32_to_cpu(notif->tsf_high),
3326                        le32_to_cpu(notif->tsf_low),
3327                        le32_to_cpu(notif->statistics[0]),
3328                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3329                        jiffies_to_msecs(elapsed_jiffies
3330                                         (priv->last_scan_jiffies, jiffies)));
3331
3332         priv->last_scan_jiffies = jiffies;
3333         priv->next_scan_jiffies = 0;
3334 }
3335
3336 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3337 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3338                                        struct iwl3945_rx_mem_buffer *rxb)
3339 {
3340         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3341         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3342
3343         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3344                        scan_notif->scanned_channels,
3345                        scan_notif->tsf_low,
3346                        scan_notif->tsf_high, scan_notif->status);
3347
3348         /* The HW is no longer scanning */
3349         clear_bit(STATUS_SCAN_HW, &priv->status);
3350
3351         /* The scan completion notification came in, so kill that timer... */
3352         cancel_delayed_work(&priv->scan_check);
3353
3354         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3355                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3356                        jiffies_to_msecs(elapsed_jiffies
3357                                         (priv->scan_pass_start, jiffies)));
3358
3359         /* Remove this scanned band from the list
3360          * of pending bands to scan */
3361         priv->scan_bands--;
3362
3363         /* If a request to abort was given, or the scan did not succeed
3364          * then we reset the scan state machine and terminate,
3365          * re-queuing another scan if one has been requested */
3366         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3367                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3368                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3369         } else {
3370                 /* If there are more bands on this scan pass reschedule */
3371                 if (priv->scan_bands > 0)
3372                         goto reschedule;
3373         }
3374
3375         priv->last_scan_jiffies = jiffies;
3376         priv->next_scan_jiffies = 0;
3377         IWL_DEBUG_INFO("Setting scan to off\n");
3378
3379         clear_bit(STATUS_SCANNING, &priv->status);
3380
3381         IWL_DEBUG_INFO("Scan took %dms\n",
3382                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3383
3384         queue_work(priv->workqueue, &priv->scan_completed);
3385
3386         return;
3387
3388 reschedule:
3389         priv->scan_pass_start = jiffies;
3390         queue_work(priv->workqueue, &priv->request_scan);
3391 }
3392
3393 /* Handle notification from uCode that card's power state is changing
3394  * due to software, hardware, or critical temperature RFKILL */
3395 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3396                                     struct iwl3945_rx_mem_buffer *rxb)
3397 {
3398         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3399         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3400         unsigned long status = priv->status;
3401
3402         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3403                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3404                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3405
3406         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3407                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3408
3409         if (flags & HW_CARD_DISABLED)
3410                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3411         else
3412                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3413
3414
3415         if (flags & SW_CARD_DISABLED)
3416                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3417         else
3418                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3419
3420         iwl3945_scan_cancel(priv);
3421
3422         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3423              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3424             (test_bit(STATUS_RF_KILL_SW, &status) !=
3425              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3426                 queue_work(priv->workqueue, &priv->rf_kill);
3427         else
3428                 wake_up_interruptible(&priv->wait_command_queue);
3429 }
3430
3431 /**
3432  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3433  *
3434  * Setup the RX handlers for each of the reply types sent from the uCode
3435  * to the host.
3436  *
3437  * This function chains into the hardware specific files for them to setup
3438  * any hardware specific handlers as well.
3439  */
3440 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3441 {
3442         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3443         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3444         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3445         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3446         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3447             iwl3945_rx_spectrum_measure_notif;
3448         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3449         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3450             iwl3945_rx_pm_debug_statistics_notif;
3451         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3452
3453         /*
3454          * The same handler is used for both the REPLY to a discrete
3455          * statistics request from the host as well as for the periodic
3456          * statistics notifications (after received beacons) from the uCode.
3457          */
3458         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3459         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3460
3461         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3462         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3463         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3464             iwl3945_rx_scan_results_notif;
3465         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3466             iwl3945_rx_scan_complete_notif;
3467         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3468
3469         /* Set up hardware specific Rx handlers */
3470         iwl3945_hw_rx_handler_setup(priv);
3471 }
3472
3473 /**
3474  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3475  * When FW advances 'R' index, all entries between old and new 'R' index
3476  * need to be reclaimed.
3477  */
3478 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3479                                       int txq_id, int index)
3480 {
3481         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3482         struct iwl3945_queue *q = &txq->q;
3483         int nfreed = 0;
3484
3485         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3486                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3487                           "is out of range [0-%d] %d %d.\n", txq_id,
3488                           index, q->n_bd, q->write_ptr, q->read_ptr);
3489                 return;
3490         }
3491
3492         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3493                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3494                 if (nfreed > 1) {
3495                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3496                                         q->write_ptr, q->read_ptr);
3497                         queue_work(priv->workqueue, &priv->restart);
3498                         break;
3499                 }
3500                 nfreed++;
3501         }
3502 }
3503
3504
3505 /**
3506  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3507  * @rxb: Rx buffer to reclaim
3508  *
3509  * If an Rx buffer has an async callback associated with it the callback
3510  * will be executed.  The attached skb (if present) will only be freed
3511  * if the callback returns 1
3512  */
3513 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3514                                 struct iwl3945_rx_mem_buffer *rxb)
3515 {
3516         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3517         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3518         int txq_id = SEQ_TO_QUEUE(sequence);
3519         int index = SEQ_TO_INDEX(sequence);
3520         int huge = sequence & SEQ_HUGE_FRAME;
3521         int cmd_index;
3522         struct iwl3945_cmd *cmd;
3523
3524         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3525
3526         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3527         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3528
3529         /* Input error checking is done when commands are added to queue. */
3530         if (cmd->meta.flags & CMD_WANT_SKB) {
3531                 cmd->meta.source->u.skb = rxb->skb;
3532                 rxb->skb = NULL;
3533         } else if (cmd->meta.u.callback &&
3534                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3535                 rxb->skb = NULL;
3536
3537         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3538
3539         if (!(cmd->meta.flags & CMD_ASYNC)) {
3540                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3541                 wake_up_interruptible(&priv->wait_command_queue);
3542         }
3543 }
3544
3545 /************************** RX-FUNCTIONS ****************************/
3546 /*
3547  * Rx theory of operation
3548  *
3549  * The host allocates 32 DMA target addresses and passes the host address
3550  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3551  * 0 to 31
3552  *
3553  * Rx Queue Indexes
3554  * The host/firmware share two index registers for managing the Rx buffers.
3555  *
3556  * The READ index maps to the first position that the firmware may be writing
3557  * to -- the driver can read up to (but not including) this position and get
3558  * good data.
3559  * The READ index is managed by the firmware once the card is enabled.
3560  *
3561  * The WRITE index maps to the last position the driver has read from -- the
3562  * position preceding WRITE is the last slot the firmware can place a packet.
3563  *
3564  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3565  * WRITE = READ.
3566  *
3567  * During initialization, the host sets up the READ queue position to the first
3568  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3569  *
3570  * When the firmware places a packet in a buffer, it will advance the READ index
3571  * and fire the RX interrupt.  The driver can then query the READ index and
3572  * process as many packets as possible, moving the WRITE index forward as it
3573  * resets the Rx queue buffers with new memory.
3574  *
3575  * The management in the driver is as follows:
3576  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3577  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3578  *   to replenish the iwl->rxq->rx_free.
3579  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3580  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3581  *   'processed' and 'read' driver indexes as well)
3582  * + A received packet is processed and handed to the kernel network stack,
3583  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3584  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3585  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3586  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3587  *   were enough free buffers and RX_STALLED is set it is cleared.
3588  *
3589  *
3590  * Driver sequence:
3591  *
3592  * iwl3945_rx_queue_alloc()   Allocates rx_free
3593  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3594  *                            iwl3945_rx_queue_restock
3595  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3596  *                            queue, updates firmware pointers, and updates
3597  *                            the WRITE index.  If insufficient rx_free buffers
3598  *                            are available, schedules iwl3945_rx_replenish
3599  *
3600  * -- enable interrupts --
3601  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3602  *                            READ INDEX, detaching the SKB from the pool.
3603  *                            Moves the packet buffer from queue to rx_used.
3604  *                            Calls iwl3945_rx_queue_restock to refill any empty
3605  *                            slots.
3606  * ...
3607  *
3608  */
3609
3610 /**
3611  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3612  */
3613 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3614 {
3615         int s = q->read - q->write;
3616         if (s <= 0)
3617                 s += RX_QUEUE_SIZE;
3618         /* keep some buffer to not confuse full and empty queue */
3619         s -= 2;
3620         if (s < 0)
3621                 s = 0;
3622         return s;
3623 }
3624
3625 /**
3626  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3627  */
3628 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3629 {
3630         u32 reg = 0;
3631         int rc = 0;
3632         unsigned long flags;
3633
3634         spin_lock_irqsave(&q->lock, flags);
3635
3636         if (q->need_update == 0)
3637                 goto exit_unlock;
3638
3639         /* If power-saving is in use, make sure device is awake */
3640         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3641                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3642
3643                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3644                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3645                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3646                         goto exit_unlock;
3647                 }
3648
3649                 rc = iwl3945_grab_nic_access(priv);
3650                 if (rc)
3651                         goto exit_unlock;
3652
3653                 /* Device expects a multiple of 8 */
3654                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3655                                      q->write & ~0x7);
3656                 iwl3945_release_nic_access(priv);
3657
3658         /* Else device is assumed to be awake */
3659         } else
3660                 /* Device expects a multiple of 8 */
3661                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3662
3663
3664         q->need_update = 0;
3665
3666  exit_unlock:
3667         spin_unlock_irqrestore(&q->lock, flags);
3668         return rc;
3669 }
3670
3671 /**
3672  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3673  */
3674 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3675                                           dma_addr_t dma_addr)
3676 {
3677         return cpu_to_le32((u32)dma_addr);
3678 }
3679
3680 /**
3681  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3682  *
3683  * If there are slots in the RX queue that need to be restocked,
3684  * and we have free pre-allocated buffers, fill the ranks as much
3685  * as we can, pulling from rx_free.
3686  *
3687  * This moves the 'write' index forward to catch up with 'processed', and
3688  * also updates the memory address in the firmware to reference the new
3689  * target buffer.
3690  */
3691 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3692 {
3693         struct iwl3945_rx_queue *rxq = &priv->rxq;
3694         struct list_head *element;
3695         struct iwl3945_rx_mem_buffer *rxb;
3696         unsigned long flags;
3697         int write, rc;
3698
3699         spin_lock_irqsave(&rxq->lock, flags);
3700         write = rxq->write & ~0x7;
3701         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3702                 /* Get next free Rx buffer, remove from free list */
3703                 element = rxq->rx_free.next;
3704                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3705                 list_del(element);
3706
3707                 /* Point to Rx buffer via next RBD in circular buffer */
3708                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3709                 rxq->queue[rxq->write] = rxb;
3710                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3711                 rxq->free_count--;
3712         }
3713         spin_unlock_irqrestore(&rxq->lock, flags);
3714         /* If the pre-allocated buffer pool is dropping low, schedule to
3715          * refill it */
3716         if (rxq->free_count <= RX_LOW_WATERMARK)
3717                 queue_work(priv->workqueue, &priv->rx_replenish);
3718
3719
3720         /* If we've added more space for the firmware to place data, tell it.
3721          * Increment device's write pointer in multiples of 8. */
3722         if ((write != (rxq->write & ~0x7))
3723             || (abs(rxq->write - rxq->read) > 7)) {
3724                 spin_lock_irqsave(&rxq->lock, flags);
3725                 rxq->need_update = 1;
3726                 spin_unlock_irqrestore(&rxq->lock, flags);
3727                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3728                 if (rc)
3729                         return rc;
3730         }
3731
3732         return 0;
3733 }
3734
3735 /**
3736  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3737  *
3738  * When moving to rx_free an SKB is allocated for the slot.
3739  *
3740  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3741  * This is called as a scheduled work item (except for during initialization)
3742  */
3743 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3744 {
3745         struct iwl3945_rx_queue *rxq = &priv->rxq;
3746         struct list_head *element;
3747         struct iwl3945_rx_mem_buffer *rxb;
3748         unsigned long flags;
3749         spin_lock_irqsave(&rxq->lock, flags);
3750         while (!list_empty(&rxq->rx_used)) {
3751                 element = rxq->rx_used.next;
3752                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3753
3754                 /* Alloc a new receive buffer */
3755                 rxb->skb =
3756                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3757                 if (!rxb->skb) {
3758                         if (net_ratelimit())
3759                                 printk(KERN_CRIT DRV_NAME
3760                                        ": Can not allocate SKB buffers\n");
3761                         /* We don't reschedule replenish work here -- we will
3762                          * call the restock method and if it still needs
3763                          * more buffers it will schedule replenish */
3764                         break;
3765                 }
3766
3767                 /* If radiotap head is required, reserve some headroom here.
3768                  * The physical head count is a variable rx_stats->phy_count.
3769                  * We reserve 4 bytes here. Plus these extra bytes, the
3770                  * headroom of the physical head should be enough for the
3771                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3772                  */
3773                 skb_reserve(rxb->skb, 4);
3774
3775                 priv->alloc_rxb_skb++;
3776                 list_del(element);
3777
3778                 /* Get physical address of RB/SKB */
3779                 rxb->dma_addr =
3780                     pci_map_single(priv->pci_dev, rxb->skb->data,
3781                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3782                 list_add_tail(&rxb->list, &rxq->rx_free);
3783                 rxq->free_count++;
3784         }
3785         spin_unlock_irqrestore(&rxq->lock, flags);
3786 }
3787
3788 /*
3789  * this should be called while priv->lock is locked
3790  */
3791 static void __iwl3945_rx_replenish(void *data)
3792 {
3793         struct iwl3945_priv *priv = data;
3794
3795         iwl3945_rx_allocate(priv);
3796         iwl3945_rx_queue_restock(priv);
3797 }
3798
3799
3800 void iwl3945_rx_replenish(void *data)
3801 {
3802         struct iwl3945_priv *priv = data;
3803         unsigned long flags;
3804
3805         iwl3945_rx_allocate(priv);
3806
3807         spin_lock_irqsave(&priv->lock, flags);
3808         iwl3945_rx_queue_restock(priv);
3809         spin_unlock_irqrestore(&priv->lock, flags);
3810 }
3811
3812 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3813  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3814  * This free routine walks the list of POOL entries and if SKB is set to
3815  * non NULL it is unmapped and freed
3816  */
3817 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3818 {
3819         int i;
3820         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3821                 if (rxq->pool[i].skb != NULL) {
3822                         pci_unmap_single(priv->pci_dev,
3823                                          rxq->pool[i].dma_addr,
3824                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3825                         dev_kfree_skb(rxq->pool[i].skb);
3826                 }
3827         }
3828
3829         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3830                             rxq->dma_addr);
3831         rxq->bd = NULL;
3832 }
3833
3834 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3835 {
3836         struct iwl3945_rx_queue *rxq = &priv->rxq;
3837         struct pci_dev *dev = priv->pci_dev;
3838         int i;
3839
3840         spin_lock_init(&rxq->lock);
3841         INIT_LIST_HEAD(&rxq->rx_free);
3842         INIT_LIST_HEAD(&rxq->rx_used);
3843
3844         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3845         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3846         if (!rxq->bd)
3847                 return -ENOMEM;
3848
3849         /* Fill the rx_used queue with _all_ of the Rx buffers */
3850         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3851                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3852
3853         /* Set us so that we have processed and used all buffers, but have
3854          * not restocked the Rx queue with fresh buffers */
3855         rxq->read = rxq->write = 0;
3856         rxq->free_count = 0;
3857         rxq->need_update = 0;
3858         return 0;
3859 }
3860
3861 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3862 {
3863         unsigned long flags;
3864         int i;
3865         spin_lock_irqsave(&rxq->lock, flags);
3866         INIT_LIST_HEAD(&rxq->rx_free);
3867         INIT_LIST_HEAD(&rxq->rx_used);
3868         /* Fill the rx_used queue with _all_ of the Rx buffers */
3869         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3870                 /* In the reset function, these buffers may have been allocated
3871                  * to an SKB, so we need to unmap and free potential storage */
3872                 if (rxq->pool[i].skb != NULL) {
3873                         pci_unmap_single(priv->pci_dev,
3874                                          rxq->pool[i].dma_addr,
3875                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3876                         priv->alloc_rxb_skb--;
3877                         dev_kfree_skb(rxq->pool[i].skb);
3878                         rxq->pool[i].skb = NULL;
3879                 }
3880                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3881         }
3882
3883         /* Set us so that we have processed and used all buffers, but have
3884          * not restocked the Rx queue with fresh buffers */
3885         rxq->read = rxq->write = 0;
3886         rxq->free_count = 0;
3887         spin_unlock_irqrestore(&rxq->lock, flags);
3888 }
3889
3890 /* Convert linear signal-to-noise ratio into dB */
3891 static u8 ratio2dB[100] = {
3892 /*       0   1   2   3   4   5   6   7   8   9 */
3893          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3894         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3895         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3896         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3897         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3898         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3899         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3900         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3901         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3902         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3903 };
3904
3905 /* Calculates a relative dB value from a ratio of linear
3906  *   (i.e. not dB) signal levels.
3907  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3908 int iwl3945_calc_db_from_ratio(int sig_ratio)
3909 {
3910         /* 1000:1 or higher just report as 60 dB */
3911         if (sig_ratio >= 1000)
3912                 return 60;
3913
3914         /* 100:1 or higher, divide by 10 and use table,
3915          *   add 20 dB to make up for divide by 10 */
3916         if (sig_ratio >= 100)
3917                 return (20 + (int)ratio2dB[sig_ratio/10]);
3918
3919         /* We shouldn't see this */
3920         if (sig_ratio < 1)
3921                 return 0;
3922
3923         /* Use table for ratios 1:1 - 99:1 */
3924         return (int)ratio2dB[sig_ratio];
3925 }
3926
3927 #define PERFECT_RSSI (-20) /* dBm */
3928 #define WORST_RSSI (-95)   /* dBm */
3929 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3930
3931 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3932  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3933  *   about formulas used below. */
3934 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3935 {
3936         int sig_qual;
3937         int degradation = PERFECT_RSSI - rssi_dbm;
3938
3939         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3940          * as indicator; formula is (signal dbm - noise dbm).
3941          * SNR at or above 40 is a great signal (100%).
3942          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3943          * Weakest usable signal is usually 10 - 15 dB SNR. */
3944         if (noise_dbm) {
3945                 if (rssi_dbm - noise_dbm >= 40)
3946                         return 100;
3947                 else if (rssi_dbm < noise_dbm)
3948                         return 0;
3949                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3950
3951         /* Else use just the signal level.
3952          * This formula is a least squares fit of data points collected and
3953          *   compared with a reference system that had a percentage (%) display
3954          *   for signal quality. */
3955         } else
3956                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3957                             (15 * RSSI_RANGE + 62 * degradation)) /
3958                            (RSSI_RANGE * RSSI_RANGE);
3959
3960         if (sig_qual > 100)
3961                 sig_qual = 100;
3962         else if (sig_qual < 1)
3963                 sig_qual = 0;
3964
3965         return sig_qual;
3966 }
3967
3968 /**
3969  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3970  *
3971  * Uses the priv->rx_handlers callback function array to invoke
3972  * the appropriate handlers, including command responses,
3973  * frame-received notifications, and other notifications.
3974  */
3975 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3976 {
3977         struct iwl3945_rx_mem_buffer *rxb;
3978         struct iwl3945_rx_packet *pkt;
3979         struct iwl3945_rx_queue *rxq = &priv->rxq;
3980         u32 r, i;
3981         int reclaim;
3982         unsigned long flags;
3983         u8 fill_rx = 0;
3984         u32 count = 8;
3985
3986         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3987          * buffer that the driver may process (last buffer filled by ucode). */
3988         r = iwl3945_hw_get_rx_read(priv);
3989         i = rxq->read;
3990
3991         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3992                 fill_rx = 1;
3993         /* Rx interrupt, but nothing sent from uCode */
3994         if (i == r)
3995                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3996
3997         while (i != r) {
3998                 rxb = rxq->queue[i];
3999
4000                 /* If an RXB doesn't have a Rx queue slot associated with it,
4001                  * then a bug has been introduced in the queue refilling
4002                  * routines -- catch it here */
4003                 BUG_ON(rxb == NULL);
4004
4005                 rxq->queue[i] = NULL;
4006
4007                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4008                                             IWL_RX_BUF_SIZE,
4009                                             PCI_DMA_FROMDEVICE);
4010                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4011
4012                 /* Reclaim a command buffer only if this packet is a response
4013                  *   to a (driver-originated) command.
4014                  * If the packet (e.g. Rx frame) originated from uCode,
4015                  *   there is no command buffer to reclaim.
4016                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4017                  *   but apparently a few don't get set; catch them here. */
4018                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4019                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4020                         (pkt->hdr.cmd != REPLY_TX);
4021
4022                 /* Based on type of command response or notification,
4023                  *   handle those that need handling via function in
4024                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4025                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4026                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4027                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4028                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4029                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4030                 } else {
4031                         /* No handling needed */
4032                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4033                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4034                                 r, i, get_cmd_string(pkt->hdr.cmd),
4035                                 pkt->hdr.cmd);
4036                 }
4037
4038                 if (reclaim) {
4039                         /* Invoke any callbacks, transfer the skb to caller, and
4040                          * fire off the (possibly) blocking iwl3945_send_cmd()
4041                          * as we reclaim the driver command queue */
4042                         if (rxb && rxb->skb)
4043                                 iwl3945_tx_cmd_complete(priv, rxb);
4044                         else
4045                                 IWL_WARNING("Claim null rxb?\n");
4046                 }
4047
4048                 /* For now we just don't re-use anything.  We can tweak this
4049                  * later to try and re-use notification packets and SKBs that
4050                  * fail to Rx correctly */
4051                 if (rxb->skb != NULL) {
4052                         priv->alloc_rxb_skb--;
4053                         dev_kfree_skb_any(rxb->skb);
4054                         rxb->skb = NULL;
4055                 }
4056
4057                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4058                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4059                 spin_lock_irqsave(&rxq->lock, flags);
4060                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4061                 spin_unlock_irqrestore(&rxq->lock, flags);
4062                 i = (i + 1) & RX_QUEUE_MASK;
4063                 /* If there are a lot of unused frames,
4064                  * restock the Rx queue so ucode won't assert. */
4065                 if (fill_rx) {
4066                         count++;
4067                         if (count >= 8) {
4068                                 priv->rxq.read = i;
4069                                 __iwl3945_rx_replenish(priv);
4070                                 count = 0;
4071                         }
4072                 }
4073         }
4074
4075         /* Backtrack one entry */
4076         priv->rxq.read = i;
4077         iwl3945_rx_queue_restock(priv);
4078 }
4079
4080 /**
4081  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4082  */
4083 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4084                                   struct iwl3945_tx_queue *txq)
4085 {
4086         u32 reg = 0;
4087         int rc = 0;
4088         int txq_id = txq->q.id;
4089
4090         if (txq->need_update == 0)
4091                 return rc;
4092
4093         /* if we're trying to save power */
4094         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4095                 /* wake up nic if it's powered down ...
4096                  * uCode will wake up, and interrupt us again, so next
4097                  * time we'll skip this part. */
4098                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4099
4100                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4101                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4102                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4103                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4104                         return rc;
4105                 }
4106
4107                 /* restore this queue's parameters in nic hardware. */
4108                 rc = iwl3945_grab_nic_access(priv);
4109                 if (rc)
4110                         return rc;
4111                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4112                                      txq->q.write_ptr | (txq_id << 8));
4113                 iwl3945_release_nic_access(priv);
4114
4115         /* else not in power-save mode, uCode will never sleep when we're
4116          * trying to tx (during RFKILL, we're not trying to tx). */
4117         } else
4118                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4119                             txq->q.write_ptr | (txq_id << 8));
4120
4121         txq->need_update = 0;
4122
4123         return rc;
4124 }
4125
4126 #ifdef CONFIG_IWL3945_DEBUG
4127 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4128 {
4129         DECLARE_MAC_BUF(mac);
4130
4131         IWL_DEBUG_RADIO("RX CONFIG:\n");
4132         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4133         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4134         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4135         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4136                         le32_to_cpu(rxon->filter_flags));
4137         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4138         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4139                         rxon->ofdm_basic_rates);
4140         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4141         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4142                         print_mac(mac, rxon->node_addr));
4143         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4144                         print_mac(mac, rxon->bssid_addr));
4145         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4146 }
4147 #endif
4148
4149 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4150 {
4151         IWL_DEBUG_ISR("Enabling interrupts\n");
4152         set_bit(STATUS_INT_ENABLED, &priv->status);
4153         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4154 }
4155
4156
4157 /* call this function to flush any scheduled tasklet */
4158 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
4159 {
4160         /* wait to make sure we flush pedding tasklet*/
4161         synchronize_irq(priv->pci_dev->irq);
4162         tasklet_kill(&priv->irq_tasklet);
4163 }
4164
4165
4166 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4167 {
4168         clear_bit(STATUS_INT_ENABLED, &priv->status);
4169
4170         /* disable interrupts from uCode/NIC to host */
4171         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4172
4173         /* acknowledge/clear/reset any interrupts still pending
4174          * from uCode or flow handler (Rx/Tx DMA) */
4175         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4176         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4177         IWL_DEBUG_ISR("Disabled interrupts\n");
4178 }
4179
4180 static const char *desc_lookup(int i)
4181 {
4182         switch (i) {
4183         case 1:
4184                 return "FAIL";
4185         case 2:
4186                 return "BAD_PARAM";
4187         case 3:
4188                 return "BAD_CHECKSUM";
4189         case 4:
4190                 return "NMI_INTERRUPT";
4191         case 5:
4192                 return "SYSASSERT";
4193         case 6:
4194                 return "FATAL_ERROR";
4195         }
4196
4197         return "UNKNOWN";
4198 }
4199
4200 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4201 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4202
4203 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4204 {
4205         u32 i;
4206         u32 desc, time, count, base, data1;
4207         u32 blink1, blink2, ilink1, ilink2;
4208         int rc;
4209
4210         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4211
4212         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4213                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4214                 return;
4215         }
4216
4217         rc = iwl3945_grab_nic_access(priv);
4218         if (rc) {
4219                 IWL_WARNING("Can not read from adapter at this time.\n");
4220                 return;
4221         }
4222
4223         count = iwl3945_read_targ_mem(priv, base);
4224
4225         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4226                 IWL_ERROR("Start IWL Error Log Dump:\n");
4227                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4228         }
4229
4230         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4231                   "ilink1  nmiPC   Line\n");
4232         for (i = ERROR_START_OFFSET;
4233              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4234              i += ERROR_ELEM_SIZE) {
4235                 desc = iwl3945_read_targ_mem(priv, base + i);
4236                 time =
4237                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4238                 blink1 =
4239                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4240                 blink2 =
4241                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4242                 ilink1 =
4243                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4244                 ilink2 =
4245                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4246                 data1 =
4247                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4248
4249                 IWL_ERROR
4250                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4251                      desc_lookup(desc), desc, time, blink1, blink2,
4252                      ilink1, ilink2, data1);
4253         }
4254
4255         iwl3945_release_nic_access(priv);
4256
4257 }
4258
4259 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4260
4261 /**
4262  * iwl3945_print_event_log - Dump error event log to syslog
4263  *
4264  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4265  */
4266 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4267                                 u32 num_events, u32 mode)
4268 {
4269         u32 i;
4270         u32 base;       /* SRAM byte address of event log header */
4271         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4272         u32 ptr;        /* SRAM byte address of log data */
4273         u32 ev, time, data; /* event log data */
4274
4275         if (num_events == 0)
4276                 return;
4277
4278         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4279
4280         if (mode == 0)
4281                 event_size = 2 * sizeof(u32);
4282         else
4283                 event_size = 3 * sizeof(u32);
4284
4285         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4286
4287         /* "time" is actually "data" for mode 0 (no timestamp).
4288          * place event id # at far right for easier visual parsing. */
4289         for (i = 0; i < num_events; i++) {
4290                 ev = iwl3945_read_targ_mem(priv, ptr);
4291                 ptr += sizeof(u32);
4292                 time = iwl3945_read_targ_mem(priv, ptr);
4293                 ptr += sizeof(u32);
4294                 if (mode == 0)
4295                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4296                 else {
4297                         data = iwl3945_read_targ_mem(priv, ptr);
4298                         ptr += sizeof(u32);
4299                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4300                 }
4301         }
4302 }
4303
4304 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4305 {
4306         int rc;
4307         u32 base;       /* SRAM byte address of event log header */
4308         u32 capacity;   /* event log capacity in # entries */
4309         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4310         u32 num_wraps;  /* # times uCode wrapped to top of log */
4311         u32 next_entry; /* index of next entry to be written by uCode */
4312         u32 size;       /* # entries that we'll print */
4313
4314         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4315         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4316                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4317                 return;
4318         }
4319
4320         rc = iwl3945_grab_nic_access(priv);
4321         if (rc) {
4322                 IWL_WARNING("Can not read from adapter at this time.\n");
4323                 return;
4324         }
4325
4326         /* event log header */
4327         capacity = iwl3945_read_targ_mem(priv, base);
4328         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4329         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4330         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4331
4332         size = num_wraps ? capacity : next_entry;
4333
4334         /* bail out if nothing in log */
4335         if (size == 0) {
4336                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4337                 iwl3945_release_nic_access(priv);
4338                 return;
4339         }
4340
4341         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4342                   size, num_wraps);
4343
4344         /* if uCode has wrapped back to top of log, start at the oldest entry,
4345          * i.e the next one that uCode would fill. */
4346         if (num_wraps)
4347                 iwl3945_print_event_log(priv, next_entry,
4348                                     capacity - next_entry, mode);
4349
4350         /* (then/else) start at top of log */
4351         iwl3945_print_event_log(priv, 0, next_entry, mode);
4352
4353         iwl3945_release_nic_access(priv);
4354 }
4355
4356 /**
4357  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4358  */
4359 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4360 {
4361         /* Set the FW error flag -- cleared on iwl3945_down */
4362         set_bit(STATUS_FW_ERROR, &priv->status);
4363
4364         /* Cancel currently queued command. */
4365         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4366
4367 #ifdef CONFIG_IWL3945_DEBUG
4368         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4369                 iwl3945_dump_nic_error_log(priv);
4370                 iwl3945_dump_nic_event_log(priv);
4371                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4372         }
4373 #endif
4374
4375         wake_up_interruptible(&priv->wait_command_queue);
4376
4377         /* Keep the restart process from trying to send host
4378          * commands by clearing the INIT status bit */
4379         clear_bit(STATUS_READY, &priv->status);
4380
4381         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4382                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4383                           "Restarting adapter due to uCode error.\n");
4384
4385                 if (iwl3945_is_associated(priv)) {
4386                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4387                                sizeof(priv->recovery_rxon));
4388                         priv->error_recovering = 1;
4389                 }
4390                 queue_work(priv->workqueue, &priv->restart);
4391         }
4392 }
4393
4394 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4395 {
4396         unsigned long flags;
4397
4398         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4399                sizeof(priv->staging_rxon));
4400         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4401         iwl3945_commit_rxon(priv);
4402
4403         iwl3945_add_station(priv, priv->bssid, 1, 0);
4404
4405         spin_lock_irqsave(&priv->lock, flags);
4406         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4407         priv->error_recovering = 0;
4408         spin_unlock_irqrestore(&priv->lock, flags);
4409 }
4410
4411 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4412 {
4413         u32 inta, handled = 0;
4414         u32 inta_fh;
4415         unsigned long flags;
4416 #ifdef CONFIG_IWL3945_DEBUG
4417         u32 inta_mask;
4418 #endif
4419
4420         spin_lock_irqsave(&priv->lock, flags);
4421
4422         /* Ack/clear/reset pending uCode interrupts.
4423          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4424          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4425         inta = iwl3945_read32(priv, CSR_INT);
4426         iwl3945_write32(priv, CSR_INT, inta);
4427
4428         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4429          * Any new interrupts that happen after this, either while we're
4430          * in this tasklet, or later, will show up in next ISR/tasklet. */
4431         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4432         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4433
4434 #ifdef CONFIG_IWL3945_DEBUG
4435         if (iwl3945_debug_level & IWL_DL_ISR) {
4436                 /* just for debug */
4437                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4438                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4439                               inta, inta_mask, inta_fh);
4440         }
4441 #endif
4442
4443         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4444          * atomic, make sure that inta covers all the interrupts that
4445          * we've discovered, even if FH interrupt came in just after
4446          * reading CSR_INT. */
4447         if (inta_fh & CSR39_FH_INT_RX_MASK)
4448                 inta |= CSR_INT_BIT_FH_RX;
4449         if (inta_fh & CSR39_FH_INT_TX_MASK)
4450                 inta |= CSR_INT_BIT_FH_TX;
4451
4452         /* Now service all interrupt bits discovered above. */
4453         if (inta & CSR_INT_BIT_HW_ERR) {
4454                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4455
4456                 /* Tell the device to stop sending interrupts */
4457                 iwl3945_disable_interrupts(priv);
4458
4459                 iwl3945_irq_handle_error(priv);
4460
4461                 handled |= CSR_INT_BIT_HW_ERR;
4462
4463                 spin_unlock_irqrestore(&priv->lock, flags);
4464
4465                 return;
4466         }
4467
4468 #ifdef CONFIG_IWL3945_DEBUG
4469         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4470                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4471                 if (inta & CSR_INT_BIT_SCD)
4472                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4473                                       "the frame/frames.\n");
4474
4475                 /* Alive notification via Rx interrupt will do the real work */
4476                 if (inta & CSR_INT_BIT_ALIVE)
4477                         IWL_DEBUG_ISR("Alive interrupt\n");
4478         }
4479 #endif
4480         /* Safely ignore these bits for debug checks below */
4481         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4482
4483         /* HW RF KILL switch toggled (4965 only) */
4484         if (inta & CSR_INT_BIT_RF_KILL) {
4485                 int hw_rf_kill = 0;
4486                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4487                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4488                         hw_rf_kill = 1;
4489
4490                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4491                                 "RF_KILL bit toggled to %s.\n",
4492                                 hw_rf_kill ? "disable radio":"enable radio");
4493
4494                 /* Queue restart only if RF_KILL switch was set to "kill"
4495                  *   when we loaded driver, and is now set to "enable".
4496                  * After we're Alive, RF_KILL gets handled by
4497                  *   iwl3945_rx_card_state_notif() */
4498                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4499                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4500                         queue_work(priv->workqueue, &priv->restart);
4501                 }
4502
4503                 handled |= CSR_INT_BIT_RF_KILL;
4504         }
4505
4506         /* Chip got too hot and stopped itself (4965 only) */
4507         if (inta & CSR_INT_BIT_CT_KILL) {
4508                 IWL_ERROR("Microcode CT kill error detected.\n");
4509                 handled |= CSR_INT_BIT_CT_KILL;
4510         }
4511
4512         /* Error detected by uCode */
4513         if (inta & CSR_INT_BIT_SW_ERR) {
4514                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4515                           inta);
4516                 iwl3945_irq_handle_error(priv);
4517                 handled |= CSR_INT_BIT_SW_ERR;
4518         }
4519
4520         /* uCode wakes up after power-down sleep */
4521         if (inta & CSR_INT_BIT_WAKEUP) {
4522                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4523                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4524                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4525                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4526                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4527                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4528                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4529                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4530
4531                 handled |= CSR_INT_BIT_WAKEUP;
4532         }
4533
4534         /* All uCode command responses, including Tx command responses,
4535          * Rx "responses" (frame-received notification), and other
4536          * notifications from uCode come through here*/
4537         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4538                 iwl3945_rx_handle(priv);
4539                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4540         }
4541
4542         if (inta & CSR_INT_BIT_FH_TX) {
4543                 IWL_DEBUG_ISR("Tx interrupt\n");
4544
4545                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4546                 if (!iwl3945_grab_nic_access(priv)) {
4547                         iwl3945_write_direct32(priv,
4548                                              FH_TCSR_CREDIT
4549                                              (ALM_FH_SRVC_CHNL), 0x0);
4550                         iwl3945_release_nic_access(priv);
4551                 }
4552                 handled |= CSR_INT_BIT_FH_TX;
4553         }
4554
4555         if (inta & ~handled)
4556                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4557
4558         if (inta & ~CSR_INI_SET_MASK) {
4559                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4560                          inta & ~CSR_INI_SET_MASK);
4561                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4562         }
4563
4564         /* Re-enable all interrupts */
4565         /* only Re-enable if disabled by irq */
4566         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4567                 iwl3945_enable_interrupts(priv);
4568
4569 #ifdef CONFIG_IWL3945_DEBUG
4570         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4571                 inta = iwl3945_read32(priv, CSR_INT);
4572                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4573                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4574                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4575                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4576         }
4577 #endif
4578         spin_unlock_irqrestore(&priv->lock, flags);
4579 }
4580
4581 static irqreturn_t iwl3945_isr(int irq, void *data)
4582 {
4583         struct iwl3945_priv *priv = data;
4584         u32 inta, inta_mask;
4585         u32 inta_fh;
4586         if (!priv)
4587                 return IRQ_NONE;
4588
4589         spin_lock(&priv->lock);
4590
4591         /* Disable (but don't clear!) interrupts here to avoid
4592          *    back-to-back ISRs and sporadic interrupts from our NIC.
4593          * If we have something to service, the tasklet will re-enable ints.
4594          * If we *don't* have something, we'll re-enable before leaving here. */
4595         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4596         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4597
4598         /* Discover which interrupts are active/pending */
4599         inta = iwl3945_read32(priv, CSR_INT);
4600         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4601
4602         /* Ignore interrupt if there's nothing in NIC to service.
4603          * This may be due to IRQ shared with another device,
4604          * or due to sporadic interrupts thrown from our NIC. */
4605         if (!inta && !inta_fh) {
4606                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4607                 goto none;
4608         }
4609
4610         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4611                 /* Hardware disappeared */
4612                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4613                 goto unplugged;
4614         }
4615
4616         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4617                       inta, inta_mask, inta_fh);
4618
4619         inta &= ~CSR_INT_BIT_SCD;
4620
4621         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4622         if (likely(inta || inta_fh))
4623                 tasklet_schedule(&priv->irq_tasklet);
4624 unplugged:
4625         spin_unlock(&priv->lock);
4626
4627         return IRQ_HANDLED;
4628
4629  none:
4630         /* re-enable interrupts here since we don't have anything to service. */
4631         /* only Re-enable if disabled by irq */
4632         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4633                 iwl3945_enable_interrupts(priv);
4634         spin_unlock(&priv->lock);
4635         return IRQ_NONE;
4636 }
4637
4638 /************************** EEPROM BANDS ****************************
4639  *
4640  * The iwl3945_eeprom_band definitions below provide the mapping from the
4641  * EEPROM contents to the specific channel number supported for each
4642  * band.
4643  *
4644  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4645  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4646  * The specific geography and calibration information for that channel
4647  * is contained in the eeprom map itself.
4648  *
4649  * During init, we copy the eeprom information and channel map
4650  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4651  *
4652  * channel_map_24/52 provides the index in the channel_info array for a
4653  * given channel.  We have to have two separate maps as there is channel
4654  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4655  * band_2
4656  *
4657  * A value of 0xff stored in the channel_map indicates that the channel
4658  * is not supported by the hardware at all.
4659  *
4660  * A value of 0xfe in the channel_map indicates that the channel is not
4661  * valid for Tx with the current hardware.  This means that
4662  * while the system can tune and receive on a given channel, it may not
4663  * be able to associate or transmit any frames on that
4664  * channel.  There is no corresponding channel information for that
4665  * entry.
4666  *
4667  *********************************************************************/
4668
4669 /* 2.4 GHz */
4670 static const u8 iwl3945_eeprom_band_1[14] = {
4671         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4672 };
4673
4674 /* 5.2 GHz bands */
4675 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4676         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4677 };
4678
4679 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4680         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4681 };
4682
4683 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4684         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4685 };
4686
4687 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4688         145, 149, 153, 157, 161, 165
4689 };
4690
4691 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4692                                     int *eeprom_ch_count,
4693                                     const struct iwl3945_eeprom_channel
4694                                     **eeprom_ch_info,
4695                                     const u8 **eeprom_ch_index)
4696 {
4697         switch (band) {
4698         case 1:         /* 2.4GHz band */
4699                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4700                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4701                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4702                 break;
4703         case 2:         /* 4.9GHz band */
4704                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4705                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4706                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4707                 break;
4708         case 3:         /* 5.2GHz band */
4709                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4710                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4711                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4712                 break;
4713         case 4:         /* 5.5GHz band */
4714                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4715                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4716                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4717                 break;
4718         case 5:         /* 5.7GHz band */
4719                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4720                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4721                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4722                 break;
4723         default:
4724                 BUG();
4725                 return;
4726         }
4727 }
4728
4729 /**
4730  * iwl3945_get_channel_info - Find driver's private channel info
4731  *
4732  * Based on band and channel number.
4733  */
4734 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4735                                                     enum ieee80211_band band, u16 channel)
4736 {
4737         int i;
4738
4739         switch (band) {
4740         case IEEE80211_BAND_5GHZ:
4741                 for (i = 14; i < priv->channel_count; i++) {
4742                         if (priv->channel_info[i].channel == channel)
4743                                 return &priv->channel_info[i];
4744                 }
4745                 break;
4746
4747         case IEEE80211_BAND_2GHZ:
4748                 if (channel >= 1 && channel <= 14)
4749                         return &priv->channel_info[channel - 1];
4750                 break;
4751         case IEEE80211_NUM_BANDS:
4752                 WARN_ON(1);
4753         }
4754
4755         return NULL;
4756 }
4757
4758 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4759                             ? # x " " : "")
4760
4761 /**
4762  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4763  */
4764 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4765 {
4766         int eeprom_ch_count = 0;
4767         const u8 *eeprom_ch_index = NULL;
4768         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4769         int band, ch;
4770         struct iwl3945_channel_info *ch_info;
4771
4772         if (priv->channel_count) {
4773                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4774                 return 0;
4775         }
4776
4777         if (priv->eeprom.version < 0x2f) {
4778                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4779                             priv->eeprom.version);
4780                 return -EINVAL;
4781         }
4782
4783         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4784
4785         priv->channel_count =
4786             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4787             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4788             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4789             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4790             ARRAY_SIZE(iwl3945_eeprom_band_5);
4791
4792         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4793
4794         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4795                                      priv->channel_count, GFP_KERNEL);
4796         if (!priv->channel_info) {
4797                 IWL_ERROR("Could not allocate channel_info\n");
4798                 priv->channel_count = 0;
4799                 return -ENOMEM;
4800         }
4801
4802         ch_info = priv->channel_info;
4803
4804         /* Loop through the 5 EEPROM bands adding them in order to the
4805          * channel map we maintain (that contains additional information than
4806          * what just in the EEPROM) */
4807         for (band = 1; band <= 5; band++) {
4808
4809                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4810                                         &eeprom_ch_info, &eeprom_ch_index);
4811
4812                 /* Loop through each band adding each of the channels */
4813                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4814                         ch_info->channel = eeprom_ch_index[ch];
4815                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4816                             IEEE80211_BAND_5GHZ;
4817
4818                         /* permanently store EEPROM's channel regulatory flags
4819                          *   and max power in channel info database. */
4820                         ch_info->eeprom = eeprom_ch_info[ch];
4821
4822                         /* Copy the run-time flags so they are there even on
4823                          * invalid channels */
4824                         ch_info->flags = eeprom_ch_info[ch].flags;
4825
4826                         if (!(is_channel_valid(ch_info))) {
4827                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4828                                                "No traffic\n",
4829                                                ch_info->channel,
4830                                                ch_info->flags,
4831                                                is_channel_a_band(ch_info) ?
4832                                                "5.2" : "2.4");
4833                                 ch_info++;
4834                                 continue;
4835                         }
4836
4837                         /* Initialize regulatory-based run-time data */
4838                         ch_info->max_power_avg = ch_info->curr_txpow =
4839                             eeprom_ch_info[ch].max_power_avg;
4840                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4841                         ch_info->min_power = 0;
4842
4843                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s%s(0x%02x"
4844                                        " %ddBm): Ad-Hoc %ssupported\n",
4845                                        ch_info->channel,
4846                                        is_channel_a_band(ch_info) ?
4847                                        "5.2" : "2.4",
4848                                        CHECK_AND_PRINT(VALID),
4849                                        CHECK_AND_PRINT(IBSS),
4850                                        CHECK_AND_PRINT(ACTIVE),
4851                                        CHECK_AND_PRINT(RADAR),
4852                                        CHECK_AND_PRINT(WIDE),
4853                                        CHECK_AND_PRINT(NARROW),
4854                                        CHECK_AND_PRINT(DFS),
4855                                        eeprom_ch_info[ch].flags,
4856                                        eeprom_ch_info[ch].max_power_avg,
4857                                        ((eeprom_ch_info[ch].
4858                                          flags & EEPROM_CHANNEL_IBSS)
4859                                         && !(eeprom_ch_info[ch].
4860                                              flags & EEPROM_CHANNEL_RADAR))
4861                                        ? "" : "not ");
4862
4863                         /* Set the user_txpower_limit to the highest power
4864                          * supported by any channel */
4865                         if (eeprom_ch_info[ch].max_power_avg >
4866                             priv->user_txpower_limit)
4867                                 priv->user_txpower_limit =
4868                                     eeprom_ch_info[ch].max_power_avg;
4869
4870                         ch_info++;
4871                 }
4872         }
4873
4874         /* Set up txpower settings in driver for all channels */
4875         if (iwl3945_txpower_set_from_eeprom(priv))
4876                 return -EIO;
4877
4878         return 0;
4879 }
4880
4881 /*
4882  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4883  */
4884 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4885 {
4886         kfree(priv->channel_info);
4887         priv->channel_count = 0;
4888 }
4889
4890 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4891  * sending probe req.  This should be set long enough to hear probe responses
4892  * from more than one AP.  */
4893 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4894 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4895
4896 /* For faster active scanning, scan will move to the next channel if fewer than
4897  * PLCP_QUIET_THRESH packets are heard on this channel within
4898  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4899  * time if it's a quiet channel (nothing responded to our probe, and there's
4900  * no other traffic).
4901  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4902 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4903 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4904
4905 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4906  * Must be set longer than active dwell time.
4907  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4908 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4909 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4910 #define IWL_PASSIVE_DWELL_BASE      (100)
4911 #define IWL_CHANNEL_TUNE_TIME       5
4912
4913 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4914                                                 enum ieee80211_band band)
4915 {
4916         if (band == IEEE80211_BAND_5GHZ)
4917                 return IWL_ACTIVE_DWELL_TIME_52;
4918         else
4919                 return IWL_ACTIVE_DWELL_TIME_24;
4920 }
4921
4922 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4923                                           enum ieee80211_band band)
4924 {
4925         u16 active = iwl3945_get_active_dwell_time(priv, band);
4926         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4927             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4928             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4929
4930         if (iwl3945_is_associated(priv)) {
4931                 /* If we're associated, we clamp the maximum passive
4932                  * dwell time to be 98% of the beacon interval (minus
4933                  * 2 * channel tune time) */
4934                 passive = priv->beacon_int;
4935                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4936                         passive = IWL_PASSIVE_DWELL_BASE;
4937                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4938         }
4939
4940         if (passive <= active)
4941                 passive = active + 1;
4942
4943         return passive;
4944 }
4945
4946 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4947                                          enum ieee80211_band band,
4948                                      u8 is_active, u8 direct_mask,
4949                                      struct iwl3945_scan_channel *scan_ch)
4950 {
4951         const struct ieee80211_channel *channels = NULL;
4952         const struct ieee80211_supported_band *sband;
4953         const struct iwl3945_channel_info *ch_info;
4954         u16 passive_dwell = 0;
4955         u16 active_dwell = 0;
4956         int added, i;
4957
4958         sband = iwl3945_get_band(priv, band);
4959         if (!sband)
4960                 return 0;
4961
4962         channels = sband->channels;
4963
4964         active_dwell = iwl3945_get_active_dwell_time(priv, band);
4965         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4966
4967         for (i = 0, added = 0; i < sband->n_channels; i++) {
4968                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4969                         continue;
4970
4971                 if (channels[i].hw_value ==
4972                     le16_to_cpu(priv->active_rxon.channel)) {
4973                         if (iwl3945_is_associated(priv)) {
4974                                 IWL_DEBUG_SCAN
4975                                     ("Skipping current channel %d\n",
4976                                      le16_to_cpu(priv->active_rxon.channel));
4977                                 continue;
4978                         }
4979                 } else if (priv->only_active_channel)
4980                         continue;
4981
4982                 scan_ch->channel = channels[i].hw_value;
4983
4984                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4985                 if (!is_channel_valid(ch_info)) {
4986                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4987                                        scan_ch->channel);
4988                         continue;
4989                 }
4990
4991                 if (!is_active || is_channel_passive(ch_info) ||
4992                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4993                         scan_ch->type = 0;      /* passive */
4994                 else
4995                         scan_ch->type = 1;      /* active */
4996
4997                 if (scan_ch->type & 1)
4998                         scan_ch->type |= (direct_mask << 1);
4999
5000                 if (is_channel_narrow(ch_info))
5001                         scan_ch->type |= (1 << 7);
5002
5003                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5004                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5005
5006                 /* Set txpower levels to defaults */
5007                 scan_ch->tpc.dsp_atten = 110;
5008                 /* scan_pwr_info->tpc.dsp_atten; */
5009
5010                 /*scan_pwr_info->tpc.tx_gain; */
5011                 if (band == IEEE80211_BAND_5GHZ)
5012                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5013                 else {
5014                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5015                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5016                          * power level:
5017                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5018                          */
5019                 }
5020
5021                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5022                                scan_ch->channel,
5023                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5024                                (scan_ch->type & 1) ?
5025                                active_dwell : passive_dwell);
5026
5027                 scan_ch++;
5028                 added++;
5029         }
5030
5031         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5032         return added;
5033 }
5034
5035 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5036                               struct ieee80211_rate *rates)
5037 {
5038         int i;
5039
5040         for (i = 0; i < IWL_RATE_COUNT; i++) {
5041                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
5042                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5043                 rates[i].hw_value_short = i;
5044                 rates[i].flags = 0;
5045                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5046                         /*
5047                          * If CCK != 1M then set short preamble rate flag.
5048                          */
5049                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5050                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5051                 }
5052         }
5053 }
5054
5055 /**
5056  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5057  */
5058 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5059 {
5060         struct iwl3945_channel_info *ch;
5061         struct ieee80211_supported_band *sband;
5062         struct ieee80211_channel *channels;
5063         struct ieee80211_channel *geo_ch;
5064         struct ieee80211_rate *rates;
5065         int i = 0;
5066
5067         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5068             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5069                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5070                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5071                 return 0;
5072         }
5073
5074         channels = kzalloc(sizeof(struct ieee80211_channel) *
5075                            priv->channel_count, GFP_KERNEL);
5076         if (!channels)
5077                 return -ENOMEM;
5078
5079         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5080                         GFP_KERNEL);
5081         if (!rates) {
5082                 kfree(channels);
5083                 return -ENOMEM;
5084         }
5085
5086         /* 5.2GHz channels start after the 2.4GHz channels */
5087         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5088         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5089         /* just OFDM */
5090         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5091         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5092
5093         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5094         sband->channels = channels;
5095         /* OFDM & CCK */
5096         sband->bitrates = rates;
5097         sband->n_bitrates = IWL_RATE_COUNT;
5098
5099         priv->ieee_channels = channels;
5100         priv->ieee_rates = rates;
5101
5102         iwl3945_init_hw_rates(priv, rates);
5103
5104         for (i = 0;  i < priv->channel_count; i++) {
5105                 ch = &priv->channel_info[i];
5106
5107                 /* FIXME: might be removed if scan is OK*/
5108                 if (!is_channel_valid(ch))
5109                         continue;
5110
5111                 if (is_channel_a_band(ch))
5112                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5113                 else
5114                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5115
5116                 geo_ch = &sband->channels[sband->n_channels++];
5117
5118                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5119                 geo_ch->max_power = ch->max_power_avg;
5120                 geo_ch->max_antenna_gain = 0xff;
5121                 geo_ch->hw_value = ch->channel;
5122
5123                 if (is_channel_valid(ch)) {
5124                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5125                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5126
5127                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5128                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5129
5130                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5131                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5132
5133                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5134                                 priv->max_channel_txpower_limit =
5135                                     ch->max_power_avg;
5136                 } else {
5137                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5138                 }
5139
5140                 /* Save flags for reg domain usage */
5141                 geo_ch->orig_flags = geo_ch->flags;
5142
5143                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5144                                 ch->channel, geo_ch->center_freq,
5145                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5146                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5147                                 "restricted" : "valid",
5148                                  geo_ch->flags);
5149         }
5150
5151         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5152              priv->cfg->sku & IWL_SKU_A) {
5153                 printk(KERN_INFO DRV_NAME
5154                        ": Incorrectly detected BG card as ABG.  Please send "
5155                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5156                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5157                  priv->cfg->sku &= ~IWL_SKU_A;
5158         }
5159
5160         printk(KERN_INFO DRV_NAME
5161                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5162                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5163                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5164
5165         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5166                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5167                         &priv->bands[IEEE80211_BAND_2GHZ];
5168         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5169                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5170                         &priv->bands[IEEE80211_BAND_5GHZ];
5171
5172         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5173
5174         return 0;
5175 }
5176
5177 /*
5178  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5179  */
5180 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5181 {
5182         kfree(priv->ieee_channels);
5183         kfree(priv->ieee_rates);
5184         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5185 }
5186
5187 /******************************************************************************
5188  *
5189  * uCode download functions
5190  *
5191  ******************************************************************************/
5192
5193 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5194 {
5195         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5196         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5197         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5198         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5199         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5200         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5201 }
5202
5203 /**
5204  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5205  *     looking at all data.
5206  */
5207 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5208 {
5209         u32 val;
5210         u32 save_len = len;
5211         int rc = 0;
5212         u32 errcnt;
5213
5214         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5215
5216         rc = iwl3945_grab_nic_access(priv);
5217         if (rc)
5218                 return rc;
5219
5220         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5221
5222         errcnt = 0;
5223         for (; len > 0; len -= sizeof(u32), image++) {
5224                 /* read data comes through single port, auto-incr addr */
5225                 /* NOTE: Use the debugless read so we don't flood kernel log
5226                  * if IWL_DL_IO is set */
5227                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5228                 if (val != le32_to_cpu(*image)) {
5229                         IWL_ERROR("uCode INST section is invalid at "
5230                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5231                                   save_len - len, val, le32_to_cpu(*image));
5232                         rc = -EIO;
5233                         errcnt++;
5234                         if (errcnt >= 20)
5235                                 break;
5236                 }
5237         }
5238
5239         iwl3945_release_nic_access(priv);
5240
5241         if (!errcnt)
5242                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5243
5244         return rc;
5245 }
5246
5247
5248 /**
5249  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5250  *   using sample data 100 bytes apart.  If these sample points are good,
5251  *   it's a pretty good bet that everything between them is good, too.
5252  */
5253 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5254 {
5255         u32 val;
5256         int rc = 0;
5257         u32 errcnt = 0;
5258         u32 i;
5259
5260         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5261
5262         rc = iwl3945_grab_nic_access(priv);
5263         if (rc)
5264                 return rc;
5265
5266         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5267                 /* read data comes through single port, auto-incr addr */
5268                 /* NOTE: Use the debugless read so we don't flood kernel log
5269                  * if IWL_DL_IO is set */
5270                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5271                         i + RTC_INST_LOWER_BOUND);
5272                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5273                 if (val != le32_to_cpu(*image)) {
5274 #if 0 /* Enable this if you want to see details */
5275                         IWL_ERROR("uCode INST section is invalid at "
5276                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5277                                   i, val, *image);
5278 #endif
5279                         rc = -EIO;
5280                         errcnt++;
5281                         if (errcnt >= 3)
5282                                 break;
5283                 }
5284         }
5285
5286         iwl3945_release_nic_access(priv);
5287
5288         return rc;
5289 }
5290
5291
5292 /**
5293  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5294  *    and verify its contents
5295  */
5296 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5297 {
5298         __le32 *image;
5299         u32 len;
5300         int rc = 0;
5301
5302         /* Try bootstrap */
5303         image = (__le32 *)priv->ucode_boot.v_addr;
5304         len = priv->ucode_boot.len;
5305         rc = iwl3945_verify_inst_sparse(priv, image, len);
5306         if (rc == 0) {
5307                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5308                 return 0;
5309         }
5310
5311         /* Try initialize */
5312         image = (__le32 *)priv->ucode_init.v_addr;
5313         len = priv->ucode_init.len;
5314         rc = iwl3945_verify_inst_sparse(priv, image, len);
5315         if (rc == 0) {
5316                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5317                 return 0;
5318         }
5319
5320         /* Try runtime/protocol */
5321         image = (__le32 *)priv->ucode_code.v_addr;
5322         len = priv->ucode_code.len;
5323         rc = iwl3945_verify_inst_sparse(priv, image, len);
5324         if (rc == 0) {
5325                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5326                 return 0;
5327         }
5328
5329         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5330
5331         /* Since nothing seems to match, show first several data entries in
5332          * instruction SRAM, so maybe visual inspection will give a clue.
5333          * Selection of bootstrap image (vs. other images) is arbitrary. */
5334         image = (__le32 *)priv->ucode_boot.v_addr;
5335         len = priv->ucode_boot.len;
5336         rc = iwl3945_verify_inst_full(priv, image, len);
5337
5338         return rc;
5339 }
5340
5341
5342 /* check contents of special bootstrap uCode SRAM */
5343 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5344 {
5345         __le32 *image = priv->ucode_boot.v_addr;
5346         u32 len = priv->ucode_boot.len;
5347         u32 reg;
5348         u32 val;
5349
5350         IWL_DEBUG_INFO("Begin verify bsm\n");
5351
5352         /* verify BSM SRAM contents */
5353         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5354         for (reg = BSM_SRAM_LOWER_BOUND;
5355              reg < BSM_SRAM_LOWER_BOUND + len;
5356              reg += sizeof(u32), image ++) {
5357                 val = iwl3945_read_prph(priv, reg);
5358                 if (val != le32_to_cpu(*image)) {
5359                         IWL_ERROR("BSM uCode verification failed at "
5360                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5361                                   BSM_SRAM_LOWER_BOUND,
5362                                   reg - BSM_SRAM_LOWER_BOUND, len,
5363                                   val, le32_to_cpu(*image));
5364                         return -EIO;
5365                 }
5366         }
5367
5368         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5369
5370         return 0;
5371 }
5372
5373 /**
5374  * iwl3945_load_bsm - Load bootstrap instructions
5375  *
5376  * BSM operation:
5377  *
5378  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5379  * in special SRAM that does not power down during RFKILL.  When powering back
5380  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5381  * the bootstrap program into the on-board processor, and starts it.
5382  *
5383  * The bootstrap program loads (via DMA) instructions and data for a new
5384  * program from host DRAM locations indicated by the host driver in the
5385  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5386  * automatically.
5387  *
5388  * When initializing the NIC, the host driver points the BSM to the
5389  * "initialize" uCode image.  This uCode sets up some internal data, then
5390  * notifies host via "initialize alive" that it is complete.
5391  *
5392  * The host then replaces the BSM_DRAM_* pointer values to point to the
5393  * normal runtime uCode instructions and a backup uCode data cache buffer
5394  * (filled initially with starting data values for the on-board processor),
5395  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5396  * which begins normal operation.
5397  *
5398  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5399  * the backup data cache in DRAM before SRAM is powered down.
5400  *
5401  * When powering back up, the BSM loads the bootstrap program.  This reloads
5402  * the runtime uCode instructions and the backup data cache into SRAM,
5403  * and re-launches the runtime uCode from where it left off.
5404  */
5405 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5406 {
5407         __le32 *image = priv->ucode_boot.v_addr;
5408         u32 len = priv->ucode_boot.len;
5409         dma_addr_t pinst;
5410         dma_addr_t pdata;
5411         u32 inst_len;
5412         u32 data_len;
5413         int rc;
5414         int i;
5415         u32 done;
5416         u32 reg_offset;
5417
5418         IWL_DEBUG_INFO("Begin load bsm\n");
5419
5420         /* make sure bootstrap program is no larger than BSM's SRAM size */
5421         if (len > IWL_MAX_BSM_SIZE)
5422                 return -EINVAL;
5423
5424         /* Tell bootstrap uCode where to find the "Initialize" uCode
5425          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5426          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5427          *        after the "initialize" uCode has run, to point to
5428          *        runtime/protocol instructions and backup data cache. */
5429         pinst = priv->ucode_init.p_addr;
5430         pdata = priv->ucode_init_data.p_addr;
5431         inst_len = priv->ucode_init.len;
5432         data_len = priv->ucode_init_data.len;
5433
5434         rc = iwl3945_grab_nic_access(priv);
5435         if (rc)
5436                 return rc;
5437
5438         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5439         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5440         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5441         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5442
5443         /* Fill BSM memory with bootstrap instructions */
5444         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5445              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5446              reg_offset += sizeof(u32), image++)
5447                 _iwl3945_write_prph(priv, reg_offset,
5448                                           le32_to_cpu(*image));
5449
5450         rc = iwl3945_verify_bsm(priv);
5451         if (rc) {
5452                 iwl3945_release_nic_access(priv);
5453                 return rc;
5454         }
5455
5456         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5457         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5458         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5459                                  RTC_INST_LOWER_BOUND);
5460         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5461
5462         /* Load bootstrap code into instruction SRAM now,
5463          *   to prepare to load "initialize" uCode */
5464         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5465                 BSM_WR_CTRL_REG_BIT_START);
5466
5467         /* Wait for load of bootstrap uCode to finish */
5468         for (i = 0; i < 100; i++) {
5469                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5470                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5471                         break;
5472                 udelay(10);
5473         }
5474         if (i < 100)
5475                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5476         else {
5477                 IWL_ERROR("BSM write did not complete!\n");
5478                 return -EIO;
5479         }
5480
5481         /* Enable future boot loads whenever power management unit triggers it
5482          *   (e.g. when powering back up after power-save shutdown) */
5483         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5484                 BSM_WR_CTRL_REG_BIT_START_EN);
5485
5486         iwl3945_release_nic_access(priv);
5487
5488         return 0;
5489 }
5490
5491 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5492 {
5493         /* Remove all resets to allow NIC to operate */
5494         iwl3945_write32(priv, CSR_RESET, 0);
5495 }
5496
5497 /**
5498  * iwl3945_read_ucode - Read uCode images from disk file.
5499  *
5500  * Copy into buffers for card to fetch via bus-mastering
5501  */
5502 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5503 {
5504         struct iwl3945_ucode *ucode;
5505         int ret = 0;
5506         const struct firmware *ucode_raw;
5507         /* firmware file name contains uCode/driver compatibility version */
5508         const char *name = priv->cfg->fw_name;
5509         u8 *src;
5510         size_t len;
5511         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5512
5513         /* Ask kernel firmware_class module to get the boot firmware off disk.
5514          * request_firmware() is synchronous, file is in memory on return. */
5515         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5516         if (ret < 0) {
5517                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5518                                 name, ret);
5519                 goto error;
5520         }
5521
5522         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5523                        name, ucode_raw->size);
5524
5525         /* Make sure that we got at least our header! */
5526         if (ucode_raw->size < sizeof(*ucode)) {
5527                 IWL_ERROR("File size way too small!\n");
5528                 ret = -EINVAL;
5529                 goto err_release;
5530         }
5531
5532         /* Data from ucode file:  header followed by uCode images */
5533         ucode = (void *)ucode_raw->data;
5534
5535         ver = le32_to_cpu(ucode->ver);
5536         inst_size = le32_to_cpu(ucode->inst_size);
5537         data_size = le32_to_cpu(ucode->data_size);
5538         init_size = le32_to_cpu(ucode->init_size);
5539         init_data_size = le32_to_cpu(ucode->init_data_size);
5540         boot_size = le32_to_cpu(ucode->boot_size);
5541
5542         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5543         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5544         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5545         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5546         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5547         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5548
5549         /* Verify size of file vs. image size info in file's header */
5550         if (ucode_raw->size < sizeof(*ucode) +
5551                 inst_size + data_size + init_size +
5552                 init_data_size + boot_size) {
5553
5554                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5555                                (int)ucode_raw->size);
5556                 ret = -EINVAL;
5557                 goto err_release;
5558         }
5559
5560         /* Verify that uCode images will fit in card's SRAM */
5561         if (inst_size > IWL_MAX_INST_SIZE) {
5562                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5563                                inst_size);
5564                 ret = -EINVAL;
5565                 goto err_release;
5566         }
5567
5568         if (data_size > IWL_MAX_DATA_SIZE) {
5569                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5570                                data_size);
5571                 ret = -EINVAL;
5572                 goto err_release;
5573         }
5574         if (init_size > IWL_MAX_INST_SIZE) {
5575                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5576                                 init_size);
5577                 ret = -EINVAL;
5578                 goto err_release;
5579         }
5580         if (init_data_size > IWL_MAX_DATA_SIZE) {
5581                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5582                                 init_data_size);
5583                 ret = -EINVAL;
5584                 goto err_release;
5585         }
5586         if (boot_size > IWL_MAX_BSM_SIZE) {
5587                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5588                                 boot_size);
5589                 ret = -EINVAL;
5590                 goto err_release;
5591         }
5592
5593         /* Allocate ucode buffers for card's bus-master loading ... */
5594
5595         /* Runtime instructions and 2 copies of data:
5596          * 1) unmodified from disk
5597          * 2) backup cache for save/restore during power-downs */
5598         priv->ucode_code.len = inst_size;
5599         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5600
5601         priv->ucode_data.len = data_size;
5602         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5603
5604         priv->ucode_data_backup.len = data_size;
5605         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5606
5607         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5608             !priv->ucode_data_backup.v_addr)
5609                 goto err_pci_alloc;
5610
5611         /* Initialization instructions and data */
5612         if (init_size && init_data_size) {
5613                 priv->ucode_init.len = init_size;
5614                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5615
5616                 priv->ucode_init_data.len = init_data_size;
5617                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5618
5619                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5620                         goto err_pci_alloc;
5621         }
5622
5623         /* Bootstrap (instructions only, no data) */
5624         if (boot_size) {
5625                 priv->ucode_boot.len = boot_size;
5626                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5627
5628                 if (!priv->ucode_boot.v_addr)
5629                         goto err_pci_alloc;
5630         }
5631
5632         /* Copy images into buffers for card's bus-master reads ... */
5633
5634         /* Runtime instructions (first block of data in file) */
5635         src = &ucode->data[0];
5636         len = priv->ucode_code.len;
5637         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5638         memcpy(priv->ucode_code.v_addr, src, len);
5639         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5640                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5641
5642         /* Runtime data (2nd block)
5643          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5644         src = &ucode->data[inst_size];
5645         len = priv->ucode_data.len;
5646         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5647         memcpy(priv->ucode_data.v_addr, src, len);
5648         memcpy(priv->ucode_data_backup.v_addr, src, len);
5649
5650         /* Initialization instructions (3rd block) */
5651         if (init_size) {
5652                 src = &ucode->data[inst_size + data_size];
5653                 len = priv->ucode_init.len;
5654                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5655                                len);
5656                 memcpy(priv->ucode_init.v_addr, src, len);
5657         }
5658
5659         /* Initialization data (4th block) */
5660         if (init_data_size) {
5661                 src = &ucode->data[inst_size + data_size + init_size];
5662                 len = priv->ucode_init_data.len;
5663                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5664                                (int)len);
5665                 memcpy(priv->ucode_init_data.v_addr, src, len);
5666         }
5667
5668         /* Bootstrap instructions (5th block) */
5669         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5670         len = priv->ucode_boot.len;
5671         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5672                        (int)len);
5673         memcpy(priv->ucode_boot.v_addr, src, len);
5674
5675         /* We have our copies now, allow OS release its copies */
5676         release_firmware(ucode_raw);
5677         return 0;
5678
5679  err_pci_alloc:
5680         IWL_ERROR("failed to allocate pci memory\n");
5681         ret = -ENOMEM;
5682         iwl3945_dealloc_ucode_pci(priv);
5683
5684  err_release:
5685         release_firmware(ucode_raw);
5686
5687  error:
5688         return ret;
5689 }
5690
5691
5692 /**
5693  * iwl3945_set_ucode_ptrs - Set uCode address location
5694  *
5695  * Tell initialization uCode where to find runtime uCode.
5696  *
5697  * BSM registers initially contain pointers to initialization uCode.
5698  * We need to replace them to load runtime uCode inst and data,
5699  * and to save runtime data when powering down.
5700  */
5701 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5702 {
5703         dma_addr_t pinst;
5704         dma_addr_t pdata;
5705         int rc = 0;
5706         unsigned long flags;
5707
5708         /* bits 31:0 for 3945 */
5709         pinst = priv->ucode_code.p_addr;
5710         pdata = priv->ucode_data_backup.p_addr;
5711
5712         spin_lock_irqsave(&priv->lock, flags);
5713         rc = iwl3945_grab_nic_access(priv);
5714         if (rc) {
5715                 spin_unlock_irqrestore(&priv->lock, flags);
5716                 return rc;
5717         }
5718
5719         /* Tell bootstrap uCode where to find image to load */
5720         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5721         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5722         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5723                                  priv->ucode_data.len);
5724
5725         /* Inst bytecount must be last to set up, bit 31 signals uCode
5726          *   that all new ptr/size info is in place */
5727         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5728                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5729
5730         iwl3945_release_nic_access(priv);
5731
5732         spin_unlock_irqrestore(&priv->lock, flags);
5733
5734         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5735
5736         return rc;
5737 }
5738
5739 /**
5740  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5741  *
5742  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5743  *
5744  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5745  */
5746 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5747 {
5748         /* Check alive response for "valid" sign from uCode */
5749         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5750                 /* We had an error bringing up the hardware, so take it
5751                  * all the way back down so we can try again */
5752                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5753                 goto restart;
5754         }
5755
5756         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5757          * This is a paranoid check, because we would not have gotten the
5758          * "initialize" alive if code weren't properly loaded.  */
5759         if (iwl3945_verify_ucode(priv)) {
5760                 /* Runtime instruction load was bad;
5761                  * take it all the way back down so we can try again */
5762                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5763                 goto restart;
5764         }
5765
5766         /* Send pointers to protocol/runtime uCode image ... init code will
5767          * load and launch runtime uCode, which will send us another "Alive"
5768          * notification. */
5769         IWL_DEBUG_INFO("Initialization Alive received.\n");
5770         if (iwl3945_set_ucode_ptrs(priv)) {
5771                 /* Runtime instruction load won't happen;
5772                  * take it all the way back down so we can try again */
5773                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5774                 goto restart;
5775         }
5776         return;
5777
5778  restart:
5779         queue_work(priv->workqueue, &priv->restart);
5780 }
5781
5782
5783 /**
5784  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5785  *                   from protocol/runtime uCode (initialization uCode's
5786  *                   Alive gets handled by iwl3945_init_alive_start()).
5787  */
5788 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5789 {
5790         int rc = 0;
5791         int thermal_spin = 0;
5792         u32 rfkill;
5793
5794         IWL_DEBUG_INFO("Runtime Alive received.\n");
5795
5796         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5797                 /* We had an error bringing up the hardware, so take it
5798                  * all the way back down so we can try again */
5799                 IWL_DEBUG_INFO("Alive failed.\n");
5800                 goto restart;
5801         }
5802
5803         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5804          * This is a paranoid check, because we would not have gotten the
5805          * "runtime" alive if code weren't properly loaded.  */
5806         if (iwl3945_verify_ucode(priv)) {
5807                 /* Runtime instruction load was bad;
5808                  * take it all the way back down so we can try again */
5809                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5810                 goto restart;
5811         }
5812
5813         iwl3945_clear_stations_table(priv);
5814
5815         rc = iwl3945_grab_nic_access(priv);
5816         if (rc) {
5817                 IWL_WARNING("Can not read rfkill status from adapter\n");
5818                 return;
5819         }
5820
5821         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5822         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5823         iwl3945_release_nic_access(priv);
5824
5825         if (rfkill & 0x1) {
5826                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5827                 /* if rfkill is not on, then wait for thermal
5828                  * sensor in adapter to kick in */
5829                 while (iwl3945_hw_get_temperature(priv) == 0) {
5830                         thermal_spin++;
5831                         udelay(10);
5832                 }
5833
5834                 if (thermal_spin)
5835                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5836                                        thermal_spin * 10);
5837         } else
5838                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5839
5840         /* After the ALIVE response, we can send commands to 3945 uCode */
5841         set_bit(STATUS_ALIVE, &priv->status);
5842
5843         /* Clear out the uCode error bit if it is set */
5844         clear_bit(STATUS_FW_ERROR, &priv->status);
5845
5846         if (iwl3945_is_rfkill(priv))
5847                 return;
5848
5849         ieee80211_start_queues(priv->hw);
5850
5851         priv->active_rate = priv->rates_mask;
5852         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5853
5854         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5855
5856         if (iwl3945_is_associated(priv)) {
5857                 struct iwl3945_rxon_cmd *active_rxon =
5858                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5859
5860                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5861                        sizeof(priv->staging_rxon));
5862                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5863         } else {
5864                 /* Initialize our rx_config data */
5865                 iwl3945_connection_init_rx_config(priv);
5866                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5867         }
5868
5869         /* Configure Bluetooth device coexistence support */
5870         iwl3945_send_bt_config(priv);
5871
5872         /* Configure the adapter for unassociated operation */
5873         iwl3945_commit_rxon(priv);
5874
5875         /* At this point, the NIC is initialized and operational */
5876         priv->notif_missed_beacons = 0;
5877
5878         iwl3945_reg_txpower_periodic(priv);
5879
5880         iwl3945_led_register(priv);
5881
5882         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5883         set_bit(STATUS_READY, &priv->status);
5884         wake_up_interruptible(&priv->wait_command_queue);
5885
5886         if (priv->error_recovering)
5887                 iwl3945_error_recovery(priv);
5888
5889         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5890         return;
5891
5892  restart:
5893         queue_work(priv->workqueue, &priv->restart);
5894 }
5895
5896 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5897
5898 static void __iwl3945_down(struct iwl3945_priv *priv)
5899 {
5900         unsigned long flags;
5901         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5902         struct ieee80211_conf *conf = NULL;
5903
5904         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5905
5906         conf = ieee80211_get_hw_conf(priv->hw);
5907
5908         if (!exit_pending)
5909                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5910
5911         iwl3945_led_unregister(priv);
5912         iwl3945_clear_stations_table(priv);
5913
5914         /* Unblock any waiting calls */
5915         wake_up_interruptible_all(&priv->wait_command_queue);
5916
5917         /* Wipe out the EXIT_PENDING status bit if we are not actually
5918          * exiting the module */
5919         if (!exit_pending)
5920                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5921
5922         /* stop and reset the on-board processor */
5923         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5924
5925         /* tell the device to stop sending interrupts */
5926         spin_lock_irqsave(&priv->lock, flags);
5927         iwl3945_disable_interrupts(priv);
5928         spin_unlock_irqrestore(&priv->lock, flags);
5929         iwl_synchronize_irq(priv);
5930
5931         if (priv->mac80211_registered)
5932                 ieee80211_stop_queues(priv->hw);
5933
5934         /* If we have not previously called iwl3945_init() then
5935          * clear all bits but the RF Kill and SUSPEND bits and return */
5936         if (!iwl3945_is_init(priv)) {
5937                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5938                                         STATUS_RF_KILL_HW |
5939                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5940                                         STATUS_RF_KILL_SW |
5941                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5942                                         STATUS_GEO_CONFIGURED |
5943                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5944                                         STATUS_IN_SUSPEND;
5945                 goto exit;
5946         }
5947
5948         /* ...otherwise clear out all the status bits but the RF Kill and
5949          * SUSPEND bits and continue taking the NIC down. */
5950         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5951                                 STATUS_RF_KILL_HW |
5952                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5953                                 STATUS_RF_KILL_SW |
5954                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5955                                 STATUS_GEO_CONFIGURED |
5956                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5957                                 STATUS_IN_SUSPEND |
5958                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5959                                 STATUS_FW_ERROR;
5960
5961         spin_lock_irqsave(&priv->lock, flags);
5962         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5963         spin_unlock_irqrestore(&priv->lock, flags);
5964
5965         iwl3945_hw_txq_ctx_stop(priv);
5966         iwl3945_hw_rxq_stop(priv);
5967
5968         spin_lock_irqsave(&priv->lock, flags);
5969         if (!iwl3945_grab_nic_access(priv)) {
5970                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5971                                          APMG_CLK_VAL_DMA_CLK_RQT);
5972                 iwl3945_release_nic_access(priv);
5973         }
5974         spin_unlock_irqrestore(&priv->lock, flags);
5975
5976         udelay(5);
5977
5978         iwl3945_hw_nic_stop_master(priv);
5979         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5980         iwl3945_hw_nic_reset(priv);
5981
5982  exit:
5983         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5984
5985         if (priv->ibss_beacon)
5986                 dev_kfree_skb(priv->ibss_beacon);
5987         priv->ibss_beacon = NULL;
5988
5989         /* clear out any free frames */
5990         iwl3945_clear_free_frames(priv);
5991 }
5992
5993 static void iwl3945_down(struct iwl3945_priv *priv)
5994 {
5995         mutex_lock(&priv->mutex);
5996         __iwl3945_down(priv);
5997         mutex_unlock(&priv->mutex);
5998
5999         iwl3945_cancel_deferred_work(priv);
6000 }
6001
6002 #define MAX_HW_RESTARTS 5
6003
6004 static int __iwl3945_up(struct iwl3945_priv *priv)
6005 {
6006         int rc, i;
6007
6008         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6009                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6010                 return -EIO;
6011         }
6012
6013         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6014                 IWL_WARNING("Radio disabled by SW RF kill (module "
6015                             "parameter)\n");
6016                 return -ENODEV;
6017         }
6018
6019         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6020                 IWL_ERROR("ucode not available for device bringup\n");
6021                 return -EIO;
6022         }
6023
6024         /* If platform's RF_KILL switch is NOT set to KILL */
6025         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6026                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6027                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6028         else {
6029                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6030                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6031                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6032                         return -ENODEV;
6033                 }
6034         }
6035
6036         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6037
6038         rc = iwl3945_hw_nic_init(priv);
6039         if (rc) {
6040                 IWL_ERROR("Unable to int nic\n");
6041                 return rc;
6042         }
6043
6044         /* make sure rfkill handshake bits are cleared */
6045         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6046         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6047                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6048
6049         /* clear (again), then enable host interrupts */
6050         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6051         iwl3945_enable_interrupts(priv);
6052
6053         /* really make sure rfkill handshake bits are cleared */
6054         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6055         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6056
6057         /* Copy original ucode data image from disk into backup cache.
6058          * This will be used to initialize the on-board processor's
6059          * data SRAM for a clean start when the runtime program first loads. */
6060         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6061                priv->ucode_data.len);
6062
6063         /* We return success when we resume from suspend and rf_kill is on. */
6064         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6065                 return 0;
6066
6067         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6068
6069                 iwl3945_clear_stations_table(priv);
6070
6071                 /* load bootstrap state machine,
6072                  * load bootstrap program into processor's memory,
6073                  * prepare to load the "initialize" uCode */
6074                 rc = iwl3945_load_bsm(priv);
6075
6076                 if (rc) {
6077                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6078                         continue;
6079                 }
6080
6081                 /* start card; "initialize" will load runtime ucode */
6082                 iwl3945_nic_start(priv);
6083
6084                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6085
6086                 return 0;
6087         }
6088
6089         set_bit(STATUS_EXIT_PENDING, &priv->status);
6090         __iwl3945_down(priv);
6091
6092         /* tried to restart and config the device for as long as our
6093          * patience could withstand */
6094         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6095         return -EIO;
6096 }
6097
6098
6099 /*****************************************************************************
6100  *
6101  * Workqueue callbacks
6102  *
6103  *****************************************************************************/
6104
6105 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6106 {
6107         struct iwl3945_priv *priv =
6108             container_of(data, struct iwl3945_priv, init_alive_start.work);
6109
6110         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6111                 return;
6112
6113         mutex_lock(&priv->mutex);
6114         iwl3945_init_alive_start(priv);
6115         mutex_unlock(&priv->mutex);
6116 }
6117
6118 static void iwl3945_bg_alive_start(struct work_struct *data)
6119 {
6120         struct iwl3945_priv *priv =
6121             container_of(data, struct iwl3945_priv, alive_start.work);
6122
6123         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6124                 return;
6125
6126         mutex_lock(&priv->mutex);
6127         iwl3945_alive_start(priv);
6128         mutex_unlock(&priv->mutex);
6129 }
6130
6131 static void iwl3945_bg_rf_kill(struct work_struct *work)
6132 {
6133         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6134
6135         wake_up_interruptible(&priv->wait_command_queue);
6136
6137         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6138                 return;
6139
6140         mutex_lock(&priv->mutex);
6141
6142         if (!iwl3945_is_rfkill(priv)) {
6143                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6144                           "HW and/or SW RF Kill no longer active, restarting "
6145                           "device\n");
6146                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6147                         queue_work(priv->workqueue, &priv->restart);
6148         } else {
6149
6150                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6151                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6152                                           "disabled by SW switch\n");
6153                 else
6154                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6155                                     "Kill switch must be turned off for "
6156                                     "wireless networking to work.\n");
6157         }
6158         mutex_unlock(&priv->mutex);
6159 }
6160
6161 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6162
6163 static void iwl3945_bg_scan_check(struct work_struct *data)
6164 {
6165         struct iwl3945_priv *priv =
6166             container_of(data, struct iwl3945_priv, scan_check.work);
6167
6168         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6169                 return;
6170
6171         mutex_lock(&priv->mutex);
6172         if (test_bit(STATUS_SCANNING, &priv->status) ||
6173             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6174                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6175                           "Scan completion watchdog resetting adapter (%dms)\n",
6176                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6177
6178                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6179                         iwl3945_send_scan_abort(priv);
6180         }
6181         mutex_unlock(&priv->mutex);
6182 }
6183
6184 static void iwl3945_bg_request_scan(struct work_struct *data)
6185 {
6186         struct iwl3945_priv *priv =
6187             container_of(data, struct iwl3945_priv, request_scan);
6188         struct iwl3945_host_cmd cmd = {
6189                 .id = REPLY_SCAN_CMD,
6190                 .len = sizeof(struct iwl3945_scan_cmd),
6191                 .meta.flags = CMD_SIZE_HUGE,
6192         };
6193         int rc = 0;
6194         struct iwl3945_scan_cmd *scan;
6195         struct ieee80211_conf *conf = NULL;
6196         u8 direct_mask;
6197         enum ieee80211_band band;
6198
6199         conf = ieee80211_get_hw_conf(priv->hw);
6200
6201         mutex_lock(&priv->mutex);
6202
6203         if (!iwl3945_is_ready(priv)) {
6204                 IWL_WARNING("request scan called when driver not ready.\n");
6205                 goto done;
6206         }
6207
6208         /* Make sure the scan wasn't cancelled before this queued work
6209          * was given the chance to run... */
6210         if (!test_bit(STATUS_SCANNING, &priv->status))
6211                 goto done;
6212
6213         /* This should never be called or scheduled if there is currently
6214          * a scan active in the hardware. */
6215         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6216                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6217                                "Ignoring second request.\n");
6218                 rc = -EIO;
6219                 goto done;
6220         }
6221
6222         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6223                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6224                 goto done;
6225         }
6226
6227         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6228                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6229                 goto done;
6230         }
6231
6232         if (iwl3945_is_rfkill(priv)) {
6233                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6234                 goto done;
6235         }
6236
6237         if (!test_bit(STATUS_READY, &priv->status)) {
6238                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6239                 goto done;
6240         }
6241
6242         if (!priv->scan_bands) {
6243                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6244                 goto done;
6245         }
6246
6247         if (!priv->scan) {
6248                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6249                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6250                 if (!priv->scan) {
6251                         rc = -ENOMEM;
6252                         goto done;
6253                 }
6254         }
6255         scan = priv->scan;
6256         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6257
6258         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6259         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6260
6261         if (iwl3945_is_associated(priv)) {
6262                 u16 interval = 0;
6263                 u32 extra;
6264                 u32 suspend_time = 100;
6265                 u32 scan_suspend_time = 100;
6266                 unsigned long flags;
6267
6268                 IWL_DEBUG_INFO("Scanning while associated...\n");
6269
6270                 spin_lock_irqsave(&priv->lock, flags);
6271                 interval = priv->beacon_int;
6272                 spin_unlock_irqrestore(&priv->lock, flags);
6273
6274                 scan->suspend_time = 0;
6275                 scan->max_out_time = cpu_to_le32(200 * 1024);
6276                 if (!interval)
6277                         interval = suspend_time;
6278                 /*
6279                  * suspend time format:
6280                  *  0-19: beacon interval in usec (time before exec.)
6281                  * 20-23: 0
6282                  * 24-31: number of beacons (suspend between channels)
6283                  */
6284
6285                 extra = (suspend_time / interval) << 24;
6286                 scan_suspend_time = 0xFF0FFFFF &
6287                     (extra | ((suspend_time % interval) * 1024));
6288
6289                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6290                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6291                                scan_suspend_time, interval);
6292         }
6293
6294         /* We should add the ability for user to lock to PASSIVE ONLY */
6295         if (priv->one_direct_scan) {
6296                 IWL_DEBUG_SCAN
6297                     ("Kicking off one direct scan for '%s'\n",
6298                      iwl3945_escape_essid(priv->direct_ssid,
6299                                       priv->direct_ssid_len));
6300                 scan->direct_scan[0].id = WLAN_EID_SSID;
6301                 scan->direct_scan[0].len = priv->direct_ssid_len;
6302                 memcpy(scan->direct_scan[0].ssid,
6303                        priv->direct_ssid, priv->direct_ssid_len);
6304                 direct_mask = 1;
6305         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6306                 scan->direct_scan[0].id = WLAN_EID_SSID;
6307                 scan->direct_scan[0].len = priv->essid_len;
6308                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6309                 direct_mask = 1;
6310         } else
6311                 direct_mask = 0;
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                 IWL_DEBUG_SCAN
6351                     ("Initiating direct scan for %s.\n",
6352                      iwl3945_escape_essid(priv->essid, priv->essid_len));
6353                 scan->channel_count =
6354                         iwl3945_get_channels_for_scan(
6355                                 priv, band, 1, /* active */
6356                                 direct_mask,
6357                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6358         } else {
6359                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6360                 scan->channel_count =
6361                         iwl3945_get_channels_for_scan(
6362                                 priv, band, 0, /* passive */
6363                                 direct_mask,
6364                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6365         }
6366
6367         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6368             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6369         cmd.data = scan;
6370         scan->len = cpu_to_le16(cmd.len);
6371
6372         set_bit(STATUS_SCAN_HW, &priv->status);
6373         rc = iwl3945_send_cmd_sync(priv, &cmd);
6374         if (rc)
6375                 goto done;
6376
6377         queue_delayed_work(priv->workqueue, &priv->scan_check,
6378                            IWL_SCAN_CHECK_WATCHDOG);
6379
6380         mutex_unlock(&priv->mutex);
6381         return;
6382
6383  done:
6384         /* inform mac80211 scan aborted */
6385         queue_work(priv->workqueue, &priv->scan_completed);
6386         mutex_unlock(&priv->mutex);
6387 }
6388
6389 static void iwl3945_bg_up(struct work_struct *data)
6390 {
6391         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6392
6393         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6394                 return;
6395
6396         mutex_lock(&priv->mutex);
6397         __iwl3945_up(priv);
6398         mutex_unlock(&priv->mutex);
6399 }
6400
6401 static void iwl3945_bg_restart(struct work_struct *data)
6402 {
6403         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6404
6405         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6406                 return;
6407
6408         iwl3945_down(priv);
6409         queue_work(priv->workqueue, &priv->up);
6410 }
6411
6412 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6413 {
6414         struct iwl3945_priv *priv =
6415             container_of(data, struct iwl3945_priv, rx_replenish);
6416
6417         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6418                 return;
6419
6420         mutex_lock(&priv->mutex);
6421         iwl3945_rx_replenish(priv);
6422         mutex_unlock(&priv->mutex);
6423 }
6424
6425 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6426
6427 static void iwl3945_bg_post_associate(struct work_struct *data)
6428 {
6429         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6430                                              post_associate.work);
6431
6432         int rc = 0;
6433         struct ieee80211_conf *conf = NULL;
6434         DECLARE_MAC_BUF(mac);
6435
6436         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6437                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6438                 return;
6439         }
6440
6441
6442         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6443                         priv->assoc_id,
6444                         print_mac(mac, priv->active_rxon.bssid_addr));
6445
6446         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6447                 return;
6448
6449         mutex_lock(&priv->mutex);
6450
6451         if (!priv->vif || !priv->is_open) {
6452                 mutex_unlock(&priv->mutex);
6453                 return;
6454         }
6455         iwl3945_scan_cancel_timeout(priv, 200);
6456
6457         conf = ieee80211_get_hw_conf(priv->hw);
6458
6459         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6460         iwl3945_commit_rxon(priv);
6461
6462         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6463         iwl3945_setup_rxon_timing(priv);
6464         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6465                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6466         if (rc)
6467                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6468                             "Attempting to continue.\n");
6469
6470         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6471
6472         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6473
6474         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6475                         priv->assoc_id, priv->beacon_int);
6476
6477         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6478                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6479         else
6480                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6481
6482         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6483                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6484                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6485                 else
6486                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6487
6488                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6489                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6490
6491         }
6492
6493         iwl3945_commit_rxon(priv);
6494
6495         switch (priv->iw_mode) {
6496         case IEEE80211_IF_TYPE_STA:
6497                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6498                 break;
6499
6500         case IEEE80211_IF_TYPE_IBSS:
6501
6502                 /* clear out the station table */
6503                 iwl3945_clear_stations_table(priv);
6504
6505                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6506                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6507                 iwl3945_sync_sta(priv, IWL_STA_ID,
6508                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6509                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6510                                  CMD_ASYNC);
6511                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6512                 iwl3945_send_beacon_cmd(priv);
6513
6514                 break;
6515
6516         default:
6517                  IWL_ERROR("%s Should not be called in %d mode\n",
6518                            __FUNCTION__, priv->iw_mode);
6519                 break;
6520         }
6521
6522         iwl3945_sequence_reset(priv);
6523
6524         iwl3945_activate_qos(priv, 0);
6525
6526         /* we have just associated, don't start scan too early */
6527         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6528         mutex_unlock(&priv->mutex);
6529 }
6530
6531 static void iwl3945_bg_abort_scan(struct work_struct *work)
6532 {
6533         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6534
6535         if (!iwl3945_is_ready(priv))
6536                 return;
6537
6538         mutex_lock(&priv->mutex);
6539
6540         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6541         iwl3945_send_scan_abort(priv);
6542
6543         mutex_unlock(&priv->mutex);
6544 }
6545
6546 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6547
6548 static void iwl3945_bg_scan_completed(struct work_struct *work)
6549 {
6550         struct iwl3945_priv *priv =
6551             container_of(work, struct iwl3945_priv, scan_completed);
6552
6553         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6554
6555         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6556                 return;
6557
6558         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6559                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6560
6561         ieee80211_scan_completed(priv->hw);
6562
6563         /* Since setting the TXPOWER may have been deferred while
6564          * performing the scan, fire one off */
6565         mutex_lock(&priv->mutex);
6566         iwl3945_hw_reg_send_txpower(priv);
6567         mutex_unlock(&priv->mutex);
6568 }
6569
6570 /*****************************************************************************
6571  *
6572  * mac80211 entry point functions
6573  *
6574  *****************************************************************************/
6575
6576 #define UCODE_READY_TIMEOUT     (2 * HZ)
6577
6578 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6579 {
6580         struct iwl3945_priv *priv = hw->priv;
6581         int ret;
6582
6583         IWL_DEBUG_MAC80211("enter\n");
6584
6585         if (pci_enable_device(priv->pci_dev)) {
6586                 IWL_ERROR("Fail to pci_enable_device\n");
6587                 return -ENODEV;
6588         }
6589         pci_restore_state(priv->pci_dev);
6590         pci_enable_msi(priv->pci_dev);
6591
6592         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6593                           DRV_NAME, priv);
6594         if (ret) {
6595                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6596                 goto out_disable_msi;
6597         }
6598
6599         /* we should be verifying the device is ready to be opened */
6600         mutex_lock(&priv->mutex);
6601
6602         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6603         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6604          * ucode filename and max sizes are card-specific. */
6605
6606         if (!priv->ucode_code.len) {
6607                 ret = iwl3945_read_ucode(priv);
6608                 if (ret) {
6609                         IWL_ERROR("Could not read microcode: %d\n", ret);
6610                         mutex_unlock(&priv->mutex);
6611                         goto out_release_irq;
6612                 }
6613         }
6614
6615         ret = __iwl3945_up(priv);
6616
6617         mutex_unlock(&priv->mutex);
6618
6619         if (ret)
6620                 goto out_release_irq;
6621
6622         IWL_DEBUG_INFO("Start UP work.\n");
6623
6624         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6625                 return 0;
6626
6627         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6628          * mac80211 will not be run successfully. */
6629         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6630                         test_bit(STATUS_READY, &priv->status),
6631                         UCODE_READY_TIMEOUT);
6632         if (!ret) {
6633                 if (!test_bit(STATUS_READY, &priv->status)) {
6634                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6635                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6636                         ret = -ETIMEDOUT;
6637                         goto out_release_irq;
6638                 }
6639         }
6640
6641         priv->is_open = 1;
6642         IWL_DEBUG_MAC80211("leave\n");
6643         return 0;
6644
6645 out_release_irq:
6646         free_irq(priv->pci_dev->irq, priv);
6647 out_disable_msi:
6648         pci_disable_msi(priv->pci_dev);
6649         pci_disable_device(priv->pci_dev);
6650         priv->is_open = 0;
6651         IWL_DEBUG_MAC80211("leave - failed\n");
6652         return ret;
6653 }
6654
6655 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6656 {
6657         struct iwl3945_priv *priv = hw->priv;
6658
6659         IWL_DEBUG_MAC80211("enter\n");
6660
6661         if (!priv->is_open) {
6662                 IWL_DEBUG_MAC80211("leave - skip\n");
6663                 return;
6664         }
6665
6666         priv->is_open = 0;
6667
6668         if (iwl3945_is_ready_rf(priv)) {
6669                 /* stop mac, cancel any scan request and clear
6670                  * RXON_FILTER_ASSOC_MSK BIT
6671                  */
6672                 mutex_lock(&priv->mutex);
6673                 iwl3945_scan_cancel_timeout(priv, 100);
6674                 cancel_delayed_work(&priv->post_associate);
6675                 mutex_unlock(&priv->mutex);
6676         }
6677
6678         iwl3945_down(priv);
6679
6680         flush_workqueue(priv->workqueue);
6681         free_irq(priv->pci_dev->irq, priv);
6682         pci_disable_msi(priv->pci_dev);
6683         pci_save_state(priv->pci_dev);
6684         pci_disable_device(priv->pci_dev);
6685
6686         IWL_DEBUG_MAC80211("leave\n");
6687 }
6688
6689 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6690                       struct ieee80211_tx_control *ctl)
6691 {
6692         struct iwl3945_priv *priv = hw->priv;
6693
6694         IWL_DEBUG_MAC80211("enter\n");
6695
6696         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6697                 IWL_DEBUG_MAC80211("leave - monitor\n");
6698                 return -1;
6699         }
6700
6701         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6702                      ctl->tx_rate->bitrate);
6703
6704         if (iwl3945_tx_skb(priv, skb, ctl))
6705                 dev_kfree_skb_any(skb);
6706
6707         IWL_DEBUG_MAC80211("leave\n");
6708         return 0;
6709 }
6710
6711 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6712                                  struct ieee80211_if_init_conf *conf)
6713 {
6714         struct iwl3945_priv *priv = hw->priv;
6715         unsigned long flags;
6716         DECLARE_MAC_BUF(mac);
6717
6718         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6719
6720         if (priv->vif) {
6721                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6722                 return -EOPNOTSUPP;
6723         }
6724
6725         spin_lock_irqsave(&priv->lock, flags);
6726         priv->vif = conf->vif;
6727
6728         spin_unlock_irqrestore(&priv->lock, flags);
6729
6730         mutex_lock(&priv->mutex);
6731
6732         if (conf->mac_addr) {
6733                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6734                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6735         }
6736
6737         if (iwl3945_is_ready(priv))
6738                 iwl3945_set_mode(priv, conf->type);
6739
6740         mutex_unlock(&priv->mutex);
6741
6742         IWL_DEBUG_MAC80211("leave\n");
6743         return 0;
6744 }
6745
6746 /**
6747  * iwl3945_mac_config - mac80211 config callback
6748  *
6749  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6750  * be set inappropriately and the driver currently sets the hardware up to
6751  * use it whenever needed.
6752  */
6753 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6754 {
6755         struct iwl3945_priv *priv = hw->priv;
6756         const struct iwl3945_channel_info *ch_info;
6757         unsigned long flags;
6758         int ret = 0;
6759
6760         mutex_lock(&priv->mutex);
6761         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6762
6763         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6764
6765         if (!iwl3945_is_ready(priv)) {
6766                 IWL_DEBUG_MAC80211("leave - not ready\n");
6767                 ret = -EIO;
6768                 goto out;
6769         }
6770
6771         if (unlikely(!iwl3945_param_disable_hw_scan &&
6772                      test_bit(STATUS_SCANNING, &priv->status))) {
6773                 IWL_DEBUG_MAC80211("leave - scanning\n");
6774                 set_bit(STATUS_CONF_PENDING, &priv->status);
6775                 mutex_unlock(&priv->mutex);
6776                 return 0;
6777         }
6778
6779         spin_lock_irqsave(&priv->lock, flags);
6780
6781         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6782                                            conf->channel->hw_value);
6783         if (!is_channel_valid(ch_info)) {
6784                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6785                                conf->channel->hw_value, conf->channel->band);
6786                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6787                 spin_unlock_irqrestore(&priv->lock, flags);
6788                 ret = -EINVAL;
6789                 goto out;
6790         }
6791
6792         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6793
6794         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6795
6796         /* The list of supported rates and rate mask can be different
6797          * for each phymode; since the phymode may have changed, reset
6798          * the rate mask to what mac80211 lists */
6799         iwl3945_set_rate(priv);
6800
6801         spin_unlock_irqrestore(&priv->lock, flags);
6802
6803 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6804         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6805                 iwl3945_hw_channel_switch(priv, conf->channel);
6806                 goto out;
6807         }
6808 #endif
6809
6810         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6811
6812         if (!conf->radio_enabled) {
6813                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6814                 goto out;
6815         }
6816
6817         if (iwl3945_is_rfkill(priv)) {
6818                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6819                 ret = -EIO;
6820                 goto out;
6821         }
6822
6823         iwl3945_set_rate(priv);
6824
6825         if (memcmp(&priv->active_rxon,
6826                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6827                 iwl3945_commit_rxon(priv);
6828         else
6829                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6830
6831         IWL_DEBUG_MAC80211("leave\n");
6832
6833 out:
6834         clear_bit(STATUS_CONF_PENDING, &priv->status);
6835         mutex_unlock(&priv->mutex);
6836         return ret;
6837 }
6838
6839 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6840 {
6841         int rc = 0;
6842
6843         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6844                 return;
6845
6846         /* The following should be done only at AP bring up */
6847         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6848
6849                 /* RXON - unassoc (to set timing command) */
6850                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6851                 iwl3945_commit_rxon(priv);
6852
6853                 /* RXON Timing */
6854                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6855                 iwl3945_setup_rxon_timing(priv);
6856                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6857                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6858                 if (rc)
6859                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6860                                         "Attempting to continue.\n");
6861
6862                 /* FIXME: what should be the assoc_id for AP? */
6863                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6864                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6865                         priv->staging_rxon.flags |=
6866                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6867                 else
6868                         priv->staging_rxon.flags &=
6869                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6870
6871                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6872                         if (priv->assoc_capability &
6873                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6874                                 priv->staging_rxon.flags |=
6875                                         RXON_FLG_SHORT_SLOT_MSK;
6876                         else
6877                                 priv->staging_rxon.flags &=
6878                                         ~RXON_FLG_SHORT_SLOT_MSK;
6879
6880                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6881                                 priv->staging_rxon.flags &=
6882                                         ~RXON_FLG_SHORT_SLOT_MSK;
6883                 }
6884                 /* restore RXON assoc */
6885                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6886                 iwl3945_commit_rxon(priv);
6887                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6888         }
6889         iwl3945_send_beacon_cmd(priv);
6890
6891         /* FIXME - we need to add code here to detect a totally new
6892          * configuration, reset the AP, unassoc, rxon timing, assoc,
6893          * clear sta table, add BCAST sta... */
6894 }
6895
6896 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6897                                         struct ieee80211_vif *vif,
6898                                     struct ieee80211_if_conf *conf)
6899 {
6900         struct iwl3945_priv *priv = hw->priv;
6901         DECLARE_MAC_BUF(mac);
6902         unsigned long flags;
6903         int rc;
6904
6905         if (conf == NULL)
6906                 return -EIO;
6907
6908         if (priv->vif != vif) {
6909                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6910                 return 0;
6911         }
6912
6913         /* XXX: this MUST use conf->mac_addr */
6914
6915         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6916             (!conf->beacon || !conf->ssid_len)) {
6917                 IWL_DEBUG_MAC80211
6918                     ("Leaving in AP mode because HostAPD is not ready.\n");
6919                 return 0;
6920         }
6921
6922         if (!iwl3945_is_alive(priv))
6923                 return -EAGAIN;
6924
6925         mutex_lock(&priv->mutex);
6926
6927         if (conf->bssid)
6928                 IWL_DEBUG_MAC80211("bssid: %s\n",
6929                                    print_mac(mac, conf->bssid));
6930
6931 /*
6932  * very dubious code was here; the probe filtering flag is never set:
6933  *
6934         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6935             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6936  */
6937
6938         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6939                 if (!conf->bssid) {
6940                         conf->bssid = priv->mac_addr;
6941                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6942                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6943                                            print_mac(mac, conf->bssid));
6944                 }
6945                 if (priv->ibss_beacon)
6946                         dev_kfree_skb(priv->ibss_beacon);
6947
6948                 priv->ibss_beacon = conf->beacon;
6949         }
6950
6951         if (iwl3945_is_rfkill(priv))
6952                 goto done;
6953
6954         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6955             !is_multicast_ether_addr(conf->bssid)) {
6956                 /* If there is currently a HW scan going on in the background
6957                  * then we need to cancel it else the RXON below will fail. */
6958                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6959                         IWL_WARNING("Aborted scan still in progress "
6960                                     "after 100ms\n");
6961                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6962                         mutex_unlock(&priv->mutex);
6963                         return -EAGAIN;
6964                 }
6965                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6966
6967                 /* TODO: Audit driver for usage of these members and see
6968                  * if mac80211 deprecates them (priv->bssid looks like it
6969                  * shouldn't be there, but I haven't scanned the IBSS code
6970                  * to verify) - jpk */
6971                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6972
6973                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6974                         iwl3945_config_ap(priv);
6975                 else {
6976                         rc = iwl3945_commit_rxon(priv);
6977                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6978                                 iwl3945_add_station(priv,
6979                                         priv->active_rxon.bssid_addr, 1, 0);
6980                 }
6981
6982         } else {
6983                 iwl3945_scan_cancel_timeout(priv, 100);
6984                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6985                 iwl3945_commit_rxon(priv);
6986         }
6987
6988  done:
6989         spin_lock_irqsave(&priv->lock, flags);
6990         if (!conf->ssid_len)
6991                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6992         else
6993                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6994
6995         priv->essid_len = conf->ssid_len;
6996         spin_unlock_irqrestore(&priv->lock, flags);
6997
6998         IWL_DEBUG_MAC80211("leave\n");
6999         mutex_unlock(&priv->mutex);
7000
7001         return 0;
7002 }
7003
7004 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
7005                                  unsigned int changed_flags,
7006                                  unsigned int *total_flags,
7007                                  int mc_count, struct dev_addr_list *mc_list)
7008 {
7009         /*
7010          * XXX: dummy
7011          * see also iwl3945_connection_init_rx_config
7012          */
7013         *total_flags = 0;
7014 }
7015
7016 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7017                                      struct ieee80211_if_init_conf *conf)
7018 {
7019         struct iwl3945_priv *priv = hw->priv;
7020
7021         IWL_DEBUG_MAC80211("enter\n");
7022
7023         mutex_lock(&priv->mutex);
7024
7025         if (iwl3945_is_ready_rf(priv)) {
7026                 iwl3945_scan_cancel_timeout(priv, 100);
7027                 cancel_delayed_work(&priv->post_associate);
7028                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7029                 iwl3945_commit_rxon(priv);
7030         }
7031         if (priv->vif == conf->vif) {
7032                 priv->vif = NULL;
7033                 memset(priv->bssid, 0, ETH_ALEN);
7034                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7035                 priv->essid_len = 0;
7036         }
7037         mutex_unlock(&priv->mutex);
7038
7039         IWL_DEBUG_MAC80211("leave\n");
7040 }
7041
7042 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7043 {
7044         int rc = 0;
7045         unsigned long flags;
7046         struct iwl3945_priv *priv = hw->priv;
7047
7048         IWL_DEBUG_MAC80211("enter\n");
7049
7050         mutex_lock(&priv->mutex);
7051         spin_lock_irqsave(&priv->lock, flags);
7052
7053         if (!iwl3945_is_ready_rf(priv)) {
7054                 rc = -EIO;
7055                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7056                 goto out_unlock;
7057         }
7058
7059         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7060                 rc = -EIO;
7061                 IWL_ERROR("ERROR: APs don't scan\n");
7062                 goto out_unlock;
7063         }
7064
7065         /* we don't schedule scan within next_scan_jiffies period */
7066         if (priv->next_scan_jiffies &&
7067                         time_after(priv->next_scan_jiffies, jiffies)) {
7068                 rc = -EAGAIN;
7069                 goto out_unlock;
7070         }
7071         /* if we just finished scan ask for delay */
7072         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7073                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7074                 rc = -EAGAIN;
7075                 goto out_unlock;
7076         }
7077         if (len) {
7078                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7079                                iwl3945_escape_essid(ssid, len), (int)len);
7080
7081                 priv->one_direct_scan = 1;
7082                 priv->direct_ssid_len = (u8)
7083                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7084                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7085         } else
7086                 priv->one_direct_scan = 0;
7087
7088         rc = iwl3945_scan_initiate(priv);
7089
7090         IWL_DEBUG_MAC80211("leave\n");
7091
7092 out_unlock:
7093         spin_unlock_irqrestore(&priv->lock, flags);
7094         mutex_unlock(&priv->mutex);
7095
7096         return rc;
7097 }
7098
7099 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7100                            const u8 *local_addr, const u8 *addr,
7101                            struct ieee80211_key_conf *key)
7102 {
7103         struct iwl3945_priv *priv = hw->priv;
7104         int rc = 0;
7105         u8 sta_id;
7106
7107         IWL_DEBUG_MAC80211("enter\n");
7108
7109         if (!iwl3945_param_hwcrypto) {
7110                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7111                 return -EOPNOTSUPP;
7112         }
7113
7114         if (is_zero_ether_addr(addr))
7115                 /* only support pairwise keys */
7116                 return -EOPNOTSUPP;
7117
7118         sta_id = iwl3945_hw_find_station(priv, addr);
7119         if (sta_id == IWL_INVALID_STATION) {
7120                 DECLARE_MAC_BUF(mac);
7121
7122                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7123                                    print_mac(mac, addr));
7124                 return -EINVAL;
7125         }
7126
7127         mutex_lock(&priv->mutex);
7128
7129         iwl3945_scan_cancel_timeout(priv, 100);
7130
7131         switch (cmd) {
7132         case  SET_KEY:
7133                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7134                 if (!rc) {
7135                         iwl3945_set_rxon_hwcrypto(priv, 1);
7136                         iwl3945_commit_rxon(priv);
7137                         key->hw_key_idx = sta_id;
7138                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7139                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7140                 }
7141                 break;
7142         case DISABLE_KEY:
7143                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7144                 if (!rc) {
7145                         iwl3945_set_rxon_hwcrypto(priv, 0);
7146                         iwl3945_commit_rxon(priv);
7147                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7148                 }
7149                 break;
7150         default:
7151                 rc = -EINVAL;
7152         }
7153
7154         IWL_DEBUG_MAC80211("leave\n");
7155         mutex_unlock(&priv->mutex);
7156
7157         return rc;
7158 }
7159
7160 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7161                            const struct ieee80211_tx_queue_params *params)
7162 {
7163         struct iwl3945_priv *priv = hw->priv;
7164         unsigned long flags;
7165         int q;
7166
7167         IWL_DEBUG_MAC80211("enter\n");
7168
7169         if (!iwl3945_is_ready_rf(priv)) {
7170                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7171                 return -EIO;
7172         }
7173
7174         if (queue >= AC_NUM) {
7175                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7176                 return 0;
7177         }
7178
7179         if (!priv->qos_data.qos_enable) {
7180                 priv->qos_data.qos_active = 0;
7181                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7182                 return 0;
7183         }
7184         q = AC_NUM - 1 - queue;
7185
7186         spin_lock_irqsave(&priv->lock, flags);
7187
7188         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7189         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7190         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7191         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7192                         cpu_to_le16((params->txop * 32));
7193
7194         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7195         priv->qos_data.qos_active = 1;
7196
7197         spin_unlock_irqrestore(&priv->lock, flags);
7198
7199         mutex_lock(&priv->mutex);
7200         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7201                 iwl3945_activate_qos(priv, 1);
7202         else if (priv->assoc_id && iwl3945_is_associated(priv))
7203                 iwl3945_activate_qos(priv, 0);
7204
7205         mutex_unlock(&priv->mutex);
7206
7207         IWL_DEBUG_MAC80211("leave\n");
7208         return 0;
7209 }
7210
7211 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7212                                 struct ieee80211_tx_queue_stats *stats)
7213 {
7214         struct iwl3945_priv *priv = hw->priv;
7215         int i, avail;
7216         struct iwl3945_tx_queue *txq;
7217         struct iwl3945_queue *q;
7218         unsigned long flags;
7219
7220         IWL_DEBUG_MAC80211("enter\n");
7221
7222         if (!iwl3945_is_ready_rf(priv)) {
7223                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7224                 return -EIO;
7225         }
7226
7227         spin_lock_irqsave(&priv->lock, flags);
7228
7229         for (i = 0; i < AC_NUM; i++) {
7230                 txq = &priv->txq[i];
7231                 q = &txq->q;
7232                 avail = iwl3945_queue_space(q);
7233
7234                 stats->data[i].len = q->n_window - avail;
7235                 stats->data[i].limit = q->n_window - q->high_mark;
7236                 stats->data[i].count = q->n_window;
7237
7238         }
7239         spin_unlock_irqrestore(&priv->lock, flags);
7240
7241         IWL_DEBUG_MAC80211("leave\n");
7242
7243         return 0;
7244 }
7245
7246 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7247                              struct ieee80211_low_level_stats *stats)
7248 {
7249         IWL_DEBUG_MAC80211("enter\n");
7250         IWL_DEBUG_MAC80211("leave\n");
7251
7252         return 0;
7253 }
7254
7255 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7256 {
7257         IWL_DEBUG_MAC80211("enter\n");
7258         IWL_DEBUG_MAC80211("leave\n");
7259
7260         return 0;
7261 }
7262
7263 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7264 {
7265         struct iwl3945_priv *priv = hw->priv;
7266         unsigned long flags;
7267
7268         mutex_lock(&priv->mutex);
7269         IWL_DEBUG_MAC80211("enter\n");
7270
7271         iwl3945_reset_qos(priv);
7272
7273         cancel_delayed_work(&priv->post_associate);
7274
7275         spin_lock_irqsave(&priv->lock, flags);
7276         priv->assoc_id = 0;
7277         priv->assoc_capability = 0;
7278         priv->call_post_assoc_from_beacon = 0;
7279
7280         /* new association get rid of ibss beacon skb */
7281         if (priv->ibss_beacon)
7282                 dev_kfree_skb(priv->ibss_beacon);
7283
7284         priv->ibss_beacon = NULL;
7285
7286         priv->beacon_int = priv->hw->conf.beacon_int;
7287         priv->timestamp1 = 0;
7288         priv->timestamp0 = 0;
7289         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7290                 priv->beacon_int = 0;
7291
7292         spin_unlock_irqrestore(&priv->lock, flags);
7293
7294         if (!iwl3945_is_ready_rf(priv)) {
7295                 IWL_DEBUG_MAC80211("leave - not ready\n");
7296                 mutex_unlock(&priv->mutex);
7297                 return;
7298         }
7299
7300         /* we are restarting association process
7301          * clear RXON_FILTER_ASSOC_MSK bit
7302         */
7303         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7304                 iwl3945_scan_cancel_timeout(priv, 100);
7305                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7306                 iwl3945_commit_rxon(priv);
7307         }
7308
7309         /* Per mac80211.h: This is only used in IBSS mode... */
7310         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7311
7312                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7313                 mutex_unlock(&priv->mutex);
7314                 return;
7315         }
7316
7317         priv->only_active_channel = 0;
7318
7319         iwl3945_set_rate(priv);
7320
7321         mutex_unlock(&priv->mutex);
7322
7323         IWL_DEBUG_MAC80211("leave\n");
7324
7325 }
7326
7327 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7328                                  struct ieee80211_tx_control *control)
7329 {
7330         struct iwl3945_priv *priv = hw->priv;
7331         unsigned long flags;
7332
7333         mutex_lock(&priv->mutex);
7334         IWL_DEBUG_MAC80211("enter\n");
7335
7336         if (!iwl3945_is_ready_rf(priv)) {
7337                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7338                 mutex_unlock(&priv->mutex);
7339                 return -EIO;
7340         }
7341
7342         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7343                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7344                 mutex_unlock(&priv->mutex);
7345                 return -EIO;
7346         }
7347
7348         spin_lock_irqsave(&priv->lock, flags);
7349
7350         if (priv->ibss_beacon)
7351                 dev_kfree_skb(priv->ibss_beacon);
7352
7353         priv->ibss_beacon = skb;
7354
7355         priv->assoc_id = 0;
7356
7357         IWL_DEBUG_MAC80211("leave\n");
7358         spin_unlock_irqrestore(&priv->lock, flags);
7359
7360         iwl3945_reset_qos(priv);
7361
7362         queue_work(priv->workqueue, &priv->post_associate.work);
7363
7364         mutex_unlock(&priv->mutex);
7365
7366         return 0;
7367 }
7368
7369 /*****************************************************************************
7370  *
7371  * sysfs attributes
7372  *
7373  *****************************************************************************/
7374
7375 #ifdef CONFIG_IWL3945_DEBUG
7376
7377 /*
7378  * The following adds a new attribute to the sysfs representation
7379  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7380  * used for controlling the debug level.
7381  *
7382  * See the level definitions in iwl for details.
7383  */
7384
7385 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7386 {
7387         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7388 }
7389 static ssize_t store_debug_level(struct device_driver *d,
7390                                  const char *buf, size_t count)
7391 {
7392         char *p = (char *)buf;
7393         u32 val;
7394
7395         val = simple_strtoul(p, &p, 0);
7396         if (p == buf)
7397                 printk(KERN_INFO DRV_NAME
7398                        ": %s is not in hex or decimal form.\n", buf);
7399         else
7400                 iwl3945_debug_level = val;
7401
7402         return strnlen(buf, count);
7403 }
7404
7405 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7406                    show_debug_level, store_debug_level);
7407
7408 #endif /* CONFIG_IWL3945_DEBUG */
7409
7410 static ssize_t show_rf_kill(struct device *d,
7411                             struct device_attribute *attr, char *buf)
7412 {
7413         /*
7414          * 0 - RF kill not enabled
7415          * 1 - SW based RF kill active (sysfs)
7416          * 2 - HW based RF kill active
7417          * 3 - Both HW and SW based RF kill active
7418          */
7419         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7420         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7421                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7422
7423         return sprintf(buf, "%i\n", val);
7424 }
7425
7426 static ssize_t store_rf_kill(struct device *d,
7427                              struct device_attribute *attr,
7428                              const char *buf, size_t count)
7429 {
7430         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7431
7432         mutex_lock(&priv->mutex);
7433         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7434         mutex_unlock(&priv->mutex);
7435
7436         return count;
7437 }
7438
7439 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7440
7441 static ssize_t show_temperature(struct device *d,
7442                                 struct device_attribute *attr, char *buf)
7443 {
7444         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7445
7446         if (!iwl3945_is_alive(priv))
7447                 return -EAGAIN;
7448
7449         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7450 }
7451
7452 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7453
7454 static ssize_t show_rs_window(struct device *d,
7455                               struct device_attribute *attr,
7456                               char *buf)
7457 {
7458         struct iwl3945_priv *priv = d->driver_data;
7459         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7460 }
7461 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7462
7463 static ssize_t show_tx_power(struct device *d,
7464                              struct device_attribute *attr, char *buf)
7465 {
7466         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7467         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7468 }
7469
7470 static ssize_t store_tx_power(struct device *d,
7471                               struct device_attribute *attr,
7472                               const char *buf, size_t count)
7473 {
7474         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7475         char *p = (char *)buf;
7476         u32 val;
7477
7478         val = simple_strtoul(p, &p, 10);
7479         if (p == buf)
7480                 printk(KERN_INFO DRV_NAME
7481                        ": %s is not in decimal form.\n", buf);
7482         else
7483                 iwl3945_hw_reg_set_txpower(priv, val);
7484
7485         return count;
7486 }
7487
7488 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7489
7490 static ssize_t show_flags(struct device *d,
7491                           struct device_attribute *attr, char *buf)
7492 {
7493         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7494
7495         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7496 }
7497
7498 static ssize_t store_flags(struct device *d,
7499                            struct device_attribute *attr,
7500                            const char *buf, size_t count)
7501 {
7502         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7503         u32 flags = simple_strtoul(buf, NULL, 0);
7504
7505         mutex_lock(&priv->mutex);
7506         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7507                 /* Cancel any currently running scans... */
7508                 if (iwl3945_scan_cancel_timeout(priv, 100))
7509                         IWL_WARNING("Could not cancel scan.\n");
7510                 else {
7511                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7512                                        flags);
7513                         priv->staging_rxon.flags = cpu_to_le32(flags);
7514                         iwl3945_commit_rxon(priv);
7515                 }
7516         }
7517         mutex_unlock(&priv->mutex);
7518
7519         return count;
7520 }
7521
7522 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7523
7524 static ssize_t show_filter_flags(struct device *d,
7525                                  struct device_attribute *attr, char *buf)
7526 {
7527         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7528
7529         return sprintf(buf, "0x%04X\n",
7530                 le32_to_cpu(priv->active_rxon.filter_flags));
7531 }
7532
7533 static ssize_t store_filter_flags(struct device *d,
7534                                   struct device_attribute *attr,
7535                                   const char *buf, size_t count)
7536 {
7537         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7538         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7539
7540         mutex_lock(&priv->mutex);
7541         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7542                 /* Cancel any currently running scans... */
7543                 if (iwl3945_scan_cancel_timeout(priv, 100))
7544                         IWL_WARNING("Could not cancel scan.\n");
7545                 else {
7546                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7547                                        "0x%04X\n", filter_flags);
7548                         priv->staging_rxon.filter_flags =
7549                                 cpu_to_le32(filter_flags);
7550                         iwl3945_commit_rxon(priv);
7551                 }
7552         }
7553         mutex_unlock(&priv->mutex);
7554
7555         return count;
7556 }
7557
7558 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7559                    store_filter_flags);
7560
7561 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7562
7563 static ssize_t show_measurement(struct device *d,
7564                                 struct device_attribute *attr, char *buf)
7565 {
7566         struct iwl3945_priv *priv = dev_get_drvdata(d);
7567         struct iwl3945_spectrum_notification measure_report;
7568         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7569         u8 *data = (u8 *) & measure_report;
7570         unsigned long flags;
7571
7572         spin_lock_irqsave(&priv->lock, flags);
7573         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7574                 spin_unlock_irqrestore(&priv->lock, flags);
7575                 return 0;
7576         }
7577         memcpy(&measure_report, &priv->measure_report, size);
7578         priv->measurement_status = 0;
7579         spin_unlock_irqrestore(&priv->lock, flags);
7580
7581         while (size && (PAGE_SIZE - len)) {
7582                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7583                                    PAGE_SIZE - len, 1);
7584                 len = strlen(buf);
7585                 if (PAGE_SIZE - len)
7586                         buf[len++] = '\n';
7587
7588                 ofs += 16;
7589                 size -= min(size, 16U);
7590         }
7591
7592         return len;
7593 }
7594
7595 static ssize_t store_measurement(struct device *d,
7596                                  struct device_attribute *attr,
7597                                  const char *buf, size_t count)
7598 {
7599         struct iwl3945_priv *priv = dev_get_drvdata(d);
7600         struct ieee80211_measurement_params params = {
7601                 .channel = le16_to_cpu(priv->active_rxon.channel),
7602                 .start_time = cpu_to_le64(priv->last_tsf),
7603                 .duration = cpu_to_le16(1),
7604         };
7605         u8 type = IWL_MEASURE_BASIC;
7606         u8 buffer[32];
7607         u8 channel;
7608
7609         if (count) {
7610                 char *p = buffer;
7611                 strncpy(buffer, buf, min(sizeof(buffer), count));
7612                 channel = simple_strtoul(p, NULL, 0);
7613                 if (channel)
7614                         params.channel = channel;
7615
7616                 p = buffer;
7617                 while (*p && *p != ' ')
7618                         p++;
7619                 if (*p)
7620                         type = simple_strtoul(p + 1, NULL, 0);
7621         }
7622
7623         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7624                        "channel %d (for '%s')\n", type, params.channel, buf);
7625         iwl3945_get_measurement(priv, &params, type);
7626
7627         return count;
7628 }
7629
7630 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7631                    show_measurement, store_measurement);
7632 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7633
7634 static ssize_t store_retry_rate(struct device *d,
7635                                 struct device_attribute *attr,
7636                                 const char *buf, size_t count)
7637 {
7638         struct iwl3945_priv *priv = dev_get_drvdata(d);
7639
7640         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7641         if (priv->retry_rate <= 0)
7642                 priv->retry_rate = 1;
7643
7644         return count;
7645 }
7646
7647 static ssize_t show_retry_rate(struct device *d,
7648                                struct device_attribute *attr, char *buf)
7649 {
7650         struct iwl3945_priv *priv = dev_get_drvdata(d);
7651         return sprintf(buf, "%d", priv->retry_rate);
7652 }
7653
7654 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7655                    store_retry_rate);
7656
7657 static ssize_t store_power_level(struct device *d,
7658                                  struct device_attribute *attr,
7659                                  const char *buf, size_t count)
7660 {
7661         struct iwl3945_priv *priv = dev_get_drvdata(d);
7662         int rc;
7663         int mode;
7664
7665         mode = simple_strtoul(buf, NULL, 0);
7666         mutex_lock(&priv->mutex);
7667
7668         if (!iwl3945_is_ready(priv)) {
7669                 rc = -EAGAIN;
7670                 goto out;
7671         }
7672
7673         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7674                 mode = IWL_POWER_AC;
7675         else
7676                 mode |= IWL_POWER_ENABLED;
7677
7678         if (mode != priv->power_mode) {
7679                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7680                 if (rc) {
7681                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7682                         goto out;
7683                 }
7684                 priv->power_mode = mode;
7685         }
7686
7687         rc = count;
7688
7689  out:
7690         mutex_unlock(&priv->mutex);
7691         return rc;
7692 }
7693
7694 #define MAX_WX_STRING 80
7695
7696 /* Values are in microsecond */
7697 static const s32 timeout_duration[] = {
7698         350000,
7699         250000,
7700         75000,
7701         37000,
7702         25000,
7703 };
7704 static const s32 period_duration[] = {
7705         400000,
7706         700000,
7707         1000000,
7708         1000000,
7709         1000000
7710 };
7711
7712 static ssize_t show_power_level(struct device *d,
7713                                 struct device_attribute *attr, char *buf)
7714 {
7715         struct iwl3945_priv *priv = dev_get_drvdata(d);
7716         int level = IWL_POWER_LEVEL(priv->power_mode);
7717         char *p = buf;
7718
7719         p += sprintf(p, "%d ", level);
7720         switch (level) {
7721         case IWL_POWER_MODE_CAM:
7722         case IWL_POWER_AC:
7723                 p += sprintf(p, "(AC)");
7724                 break;
7725         case IWL_POWER_BATTERY:
7726                 p += sprintf(p, "(BATTERY)");
7727                 break;
7728         default:
7729                 p += sprintf(p,
7730                              "(Timeout %dms, Period %dms)",
7731                              timeout_duration[level - 1] / 1000,
7732                              period_duration[level - 1] / 1000);
7733         }
7734
7735         if (!(priv->power_mode & IWL_POWER_ENABLED))
7736                 p += sprintf(p, " OFF\n");
7737         else
7738                 p += sprintf(p, " \n");
7739
7740         return (p - buf + 1);
7741
7742 }
7743
7744 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7745                    store_power_level);
7746
7747 static ssize_t show_channels(struct device *d,
7748                              struct device_attribute *attr, char *buf)
7749 {
7750         /* all this shit doesn't belong into sysfs anyway */
7751         return 0;
7752 }
7753
7754 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7755
7756 static ssize_t show_statistics(struct device *d,
7757                                struct device_attribute *attr, char *buf)
7758 {
7759         struct iwl3945_priv *priv = dev_get_drvdata(d);
7760         u32 size = sizeof(struct iwl3945_notif_statistics);
7761         u32 len = 0, ofs = 0;
7762         u8 *data = (u8 *) & priv->statistics;
7763         int rc = 0;
7764
7765         if (!iwl3945_is_alive(priv))
7766                 return -EAGAIN;
7767
7768         mutex_lock(&priv->mutex);
7769         rc = iwl3945_send_statistics_request(priv);
7770         mutex_unlock(&priv->mutex);
7771
7772         if (rc) {
7773                 len = sprintf(buf,
7774                               "Error sending statistics request: 0x%08X\n", rc);
7775                 return len;
7776         }
7777
7778         while (size && (PAGE_SIZE - len)) {
7779                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7780                                    PAGE_SIZE - len, 1);
7781                 len = strlen(buf);
7782                 if (PAGE_SIZE - len)
7783                         buf[len++] = '\n';
7784
7785                 ofs += 16;
7786                 size -= min(size, 16U);
7787         }
7788
7789         return len;
7790 }
7791
7792 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7793
7794 static ssize_t show_antenna(struct device *d,
7795                             struct device_attribute *attr, char *buf)
7796 {
7797         struct iwl3945_priv *priv = dev_get_drvdata(d);
7798
7799         if (!iwl3945_is_alive(priv))
7800                 return -EAGAIN;
7801
7802         return sprintf(buf, "%d\n", priv->antenna);
7803 }
7804
7805 static ssize_t store_antenna(struct device *d,
7806                              struct device_attribute *attr,
7807                              const char *buf, size_t count)
7808 {
7809         int ant;
7810         struct iwl3945_priv *priv = dev_get_drvdata(d);
7811
7812         if (count == 0)
7813                 return 0;
7814
7815         if (sscanf(buf, "%1i", &ant) != 1) {
7816                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7817                 return count;
7818         }
7819
7820         if ((ant >= 0) && (ant <= 2)) {
7821                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7822                 priv->antenna = (enum iwl3945_antenna)ant;
7823         } else
7824                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7825
7826
7827         return count;
7828 }
7829
7830 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7831
7832 static ssize_t show_status(struct device *d,
7833                            struct device_attribute *attr, char *buf)
7834 {
7835         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7836         if (!iwl3945_is_alive(priv))
7837                 return -EAGAIN;
7838         return sprintf(buf, "0x%08x\n", (int)priv->status);
7839 }
7840
7841 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7842
7843 static ssize_t dump_error_log(struct device *d,
7844                               struct device_attribute *attr,
7845                               const char *buf, size_t count)
7846 {
7847         char *p = (char *)buf;
7848
7849         if (p[0] == '1')
7850                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7851
7852         return strnlen(buf, count);
7853 }
7854
7855 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7856
7857 static ssize_t dump_event_log(struct device *d,
7858                               struct device_attribute *attr,
7859                               const char *buf, size_t count)
7860 {
7861         char *p = (char *)buf;
7862
7863         if (p[0] == '1')
7864                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7865
7866         return strnlen(buf, count);
7867 }
7868
7869 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7870
7871 /*****************************************************************************
7872  *
7873  * driver setup and teardown
7874  *
7875  *****************************************************************************/
7876
7877 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7878 {
7879         priv->workqueue = create_workqueue(DRV_NAME);
7880
7881         init_waitqueue_head(&priv->wait_command_queue);
7882
7883         INIT_WORK(&priv->up, iwl3945_bg_up);
7884         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7885         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7886         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7887         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7888         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7889         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7890         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7891         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
7892         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7893         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7894         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7895
7896         iwl3945_hw_setup_deferred_work(priv);
7897
7898         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7899                      iwl3945_irq_tasklet, (unsigned long)priv);
7900 }
7901
7902 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7903 {
7904         iwl3945_hw_cancel_deferred_work(priv);
7905
7906         cancel_delayed_work_sync(&priv->init_alive_start);
7907         cancel_delayed_work(&priv->scan_check);
7908         cancel_delayed_work(&priv->alive_start);
7909         cancel_delayed_work(&priv->post_associate);
7910         cancel_work_sync(&priv->beacon_update);
7911 }
7912
7913 static struct attribute *iwl3945_sysfs_entries[] = {
7914         &dev_attr_antenna.attr,
7915         &dev_attr_channels.attr,
7916         &dev_attr_dump_errors.attr,
7917         &dev_attr_dump_events.attr,
7918         &dev_attr_flags.attr,
7919         &dev_attr_filter_flags.attr,
7920 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7921         &dev_attr_measurement.attr,
7922 #endif
7923         &dev_attr_power_level.attr,
7924         &dev_attr_retry_rate.attr,
7925         &dev_attr_rf_kill.attr,
7926         &dev_attr_rs_window.attr,
7927         &dev_attr_statistics.attr,
7928         &dev_attr_status.attr,
7929         &dev_attr_temperature.attr,
7930         &dev_attr_tx_power.attr,
7931
7932         NULL
7933 };
7934
7935 static struct attribute_group iwl3945_attribute_group = {
7936         .name = NULL,           /* put in device directory */
7937         .attrs = iwl3945_sysfs_entries,
7938 };
7939
7940 static struct ieee80211_ops iwl3945_hw_ops = {
7941         .tx = iwl3945_mac_tx,
7942         .start = iwl3945_mac_start,
7943         .stop = iwl3945_mac_stop,
7944         .add_interface = iwl3945_mac_add_interface,
7945         .remove_interface = iwl3945_mac_remove_interface,
7946         .config = iwl3945_mac_config,
7947         .config_interface = iwl3945_mac_config_interface,
7948         .configure_filter = iwl3945_configure_filter,
7949         .set_key = iwl3945_mac_set_key,
7950         .get_stats = iwl3945_mac_get_stats,
7951         .get_tx_stats = iwl3945_mac_get_tx_stats,
7952         .conf_tx = iwl3945_mac_conf_tx,
7953         .get_tsf = iwl3945_mac_get_tsf,
7954         .reset_tsf = iwl3945_mac_reset_tsf,
7955         .beacon_update = iwl3945_mac_beacon_update,
7956         .hw_scan = iwl3945_mac_hw_scan
7957 };
7958
7959 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7960 {
7961         int err = 0;
7962         struct iwl3945_priv *priv;
7963         struct ieee80211_hw *hw;
7964         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7965         int i;
7966         unsigned long flags;
7967         DECLARE_MAC_BUF(mac);
7968
7969         /* Disabling hardware scan means that mac80211 will perform scans
7970          * "the hard way", rather than using device's scan. */
7971         if (iwl3945_param_disable_hw_scan) {
7972                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7973                 iwl3945_hw_ops.hw_scan = NULL;
7974         }
7975
7976         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7977             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7978                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7979                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7980                 err = -EINVAL;
7981                 goto out;
7982         }
7983
7984         /* mac80211 allocates memory for this device instance, including
7985          *   space for this driver's private structure */
7986         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7987         if (hw == NULL) {
7988                 IWL_ERROR("Can not allocate network device\n");
7989                 err = -ENOMEM;
7990                 goto out;
7991         }
7992         SET_IEEE80211_DEV(hw, &pdev->dev);
7993
7994         hw->rate_control_algorithm = "iwl-3945-rs";
7995
7996         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7997         priv = hw->priv;
7998         priv->hw = hw;
7999
8000         priv->pci_dev = pdev;
8001         priv->cfg = cfg;
8002
8003         /* Select antenna (may be helpful if only one antenna is connected) */
8004         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
8005 #ifdef CONFIG_IWL3945_DEBUG
8006         iwl3945_debug_level = iwl3945_param_debug;
8007         atomic_set(&priv->restrict_refcnt, 0);
8008 #endif
8009         priv->retry_rate = 1;
8010
8011         priv->ibss_beacon = NULL;
8012
8013         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8014          *   the range of signal quality values that we'll provide.
8015          * Negative values for level/noise indicate that we'll provide dBm.
8016          * For WE, at least, non-0 values here *enable* display of values
8017          *   in app (iwconfig). */
8018         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8019         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8020         hw->max_signal = 100;   /* link quality indication (%) */
8021
8022         /* Tell mac80211 our Tx characteristics */
8023         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8024
8025         /* 4 EDCA QOS priorities */
8026         hw->queues = 4;
8027
8028         spin_lock_init(&priv->lock);
8029         spin_lock_init(&priv->power_data.lock);
8030         spin_lock_init(&priv->sta_lock);
8031         spin_lock_init(&priv->hcmd_lock);
8032
8033         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8034                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8035
8036         INIT_LIST_HEAD(&priv->free_frames);
8037
8038         mutex_init(&priv->mutex);
8039         if (pci_enable_device(pdev)) {
8040                 err = -ENODEV;
8041                 goto out_ieee80211_free_hw;
8042         }
8043
8044         pci_set_master(pdev);
8045
8046         /* Clear the driver's (not device's) station table */
8047         iwl3945_clear_stations_table(priv);
8048
8049         priv->data_retry_limit = -1;
8050         priv->ieee_channels = NULL;
8051         priv->ieee_rates = NULL;
8052         priv->band = IEEE80211_BAND_2GHZ;
8053
8054         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8055         if (!err)
8056                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8057         if (err) {
8058                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8059                 goto out_pci_disable_device;
8060         }
8061
8062         pci_set_drvdata(pdev, priv);
8063         err = pci_request_regions(pdev, DRV_NAME);
8064         if (err)
8065                 goto out_pci_disable_device;
8066
8067         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8068          * PCI Tx retries from interfering with C3 CPU state */
8069         pci_write_config_byte(pdev, 0x41, 0x00);
8070
8071         priv->hw_base = pci_iomap(pdev, 0, 0);
8072         if (!priv->hw_base) {
8073                 err = -ENODEV;
8074                 goto out_pci_release_regions;
8075         }
8076
8077         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8078                         (unsigned long long) pci_resource_len(pdev, 0));
8079         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8080
8081         /* Initialize module parameter values here */
8082
8083         /* Disable radio (SW RF KILL) via parameter when loading driver */
8084         if (iwl3945_param_disable) {
8085                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8086                 IWL_DEBUG_INFO("Radio disabled.\n");
8087         }
8088
8089         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8090
8091         printk(KERN_INFO DRV_NAME
8092                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8093
8094         /* Device-specific setup */
8095         if (iwl3945_hw_set_hw_setting(priv)) {
8096                 IWL_ERROR("failed to set hw settings\n");
8097                 goto out_iounmap;
8098         }
8099
8100         if (iwl3945_param_qos_enable)
8101                 priv->qos_data.qos_enable = 1;
8102
8103         iwl3945_reset_qos(priv);
8104
8105         priv->qos_data.qos_active = 0;
8106         priv->qos_data.qos_cap.val = 0;
8107
8108         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8109         iwl3945_setup_deferred_work(priv);
8110         iwl3945_setup_rx_handlers(priv);
8111
8112         priv->rates_mask = IWL_RATES_MASK;
8113         /* If power management is turned on, default to AC mode */
8114         priv->power_mode = IWL_POWER_AC;
8115         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8116
8117         spin_lock_irqsave(&priv->lock, flags);
8118         iwl3945_disable_interrupts(priv);
8119         spin_unlock_irqrestore(&priv->lock, flags);
8120
8121         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8122         if (err) {
8123                 IWL_ERROR("failed to create sysfs device attributes\n");
8124                 goto out_release_irq;
8125         }
8126
8127         /* nic init */
8128         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8129                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8130
8131         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8132         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8133                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8134                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8135         if (err < 0) {
8136                 IWL_DEBUG_INFO("Failed to init the card\n");
8137                 goto out_remove_sysfs;
8138         }
8139         /* Read the EEPROM */
8140         err = iwl3945_eeprom_init(priv);
8141         if (err) {
8142                 IWL_ERROR("Unable to init EEPROM\n");
8143                 goto out_remove_sysfs;
8144         }
8145         /* MAC Address location in EEPROM same for 3945/4965 */
8146         get_eeprom_mac(priv, priv->mac_addr);
8147         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8148         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8149
8150         err = iwl3945_init_channel_map(priv);
8151         if (err) {
8152                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8153                 goto out_remove_sysfs;
8154         }
8155
8156         err = iwl3945_init_geos(priv);
8157         if (err) {
8158                 IWL_ERROR("initializing geos failed: %d\n", err);
8159                 goto out_free_channel_map;
8160         }
8161
8162         err = ieee80211_register_hw(priv->hw);
8163         if (err) {
8164                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8165                 goto out_free_geos;
8166         }
8167
8168         priv->hw->conf.beacon_int = 100;
8169         priv->mac80211_registered = 1;
8170         pci_save_state(pdev);
8171         pci_disable_device(pdev);
8172
8173         return 0;
8174
8175  out_free_geos:
8176         iwl3945_free_geos(priv);
8177  out_free_channel_map:
8178         iwl3945_free_channel_map(priv);
8179  out_remove_sysfs:
8180         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8181
8182  out_release_irq:
8183         destroy_workqueue(priv->workqueue);
8184         priv->workqueue = NULL;
8185         iwl3945_unset_hw_setting(priv);
8186
8187  out_iounmap:
8188         pci_iounmap(pdev, priv->hw_base);
8189  out_pci_release_regions:
8190         pci_release_regions(pdev);
8191  out_pci_disable_device:
8192         pci_disable_device(pdev);
8193         pci_set_drvdata(pdev, NULL);
8194  out_ieee80211_free_hw:
8195         ieee80211_free_hw(priv->hw);
8196  out:
8197         return err;
8198 }
8199
8200 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8201 {
8202         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8203         struct list_head *p, *q;
8204         int i;
8205         unsigned long flags;
8206
8207         if (!priv)
8208                 return;
8209
8210         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8211
8212         set_bit(STATUS_EXIT_PENDING, &priv->status);
8213
8214         iwl3945_down(priv);
8215
8216         /* make sure we flush any pending irq or
8217          * tasklet for the driver
8218          */
8219         spin_lock_irqsave(&priv->lock, flags);
8220         iwl3945_disable_interrupts(priv);
8221         spin_unlock_irqrestore(&priv->lock, flags);
8222
8223         iwl_synchronize_irq(priv);
8224
8225         /* Free MAC hash list for ADHOC */
8226         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8227                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8228                         list_del(p);
8229                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8230                 }
8231         }
8232
8233         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8234
8235         iwl3945_dealloc_ucode_pci(priv);
8236
8237         if (priv->rxq.bd)
8238                 iwl3945_rx_queue_free(priv, &priv->rxq);
8239         iwl3945_hw_txq_ctx_free(priv);
8240
8241         iwl3945_unset_hw_setting(priv);
8242         iwl3945_clear_stations_table(priv);
8243
8244         if (priv->mac80211_registered) {
8245                 ieee80211_unregister_hw(priv->hw);
8246         }
8247
8248         /*netif_stop_queue(dev); */
8249         flush_workqueue(priv->workqueue);
8250
8251         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8252          * priv->workqueue... so we can't take down the workqueue
8253          * until now... */
8254         destroy_workqueue(priv->workqueue);
8255         priv->workqueue = NULL;
8256
8257         pci_iounmap(pdev, priv->hw_base);
8258         pci_release_regions(pdev);
8259         pci_disable_device(pdev);
8260         pci_set_drvdata(pdev, NULL);
8261
8262         iwl3945_free_channel_map(priv);
8263         iwl3945_free_geos(priv);
8264
8265         if (priv->ibss_beacon)
8266                 dev_kfree_skb(priv->ibss_beacon);
8267
8268         ieee80211_free_hw(priv->hw);
8269 }
8270
8271 #ifdef CONFIG_PM
8272
8273 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8274 {
8275         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8276
8277         if (priv->is_open) {
8278                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8279                 iwl3945_mac_stop(priv->hw);
8280                 priv->is_open = 1;
8281         }
8282
8283         pci_set_power_state(pdev, PCI_D3hot);
8284
8285         return 0;
8286 }
8287
8288 static int iwl3945_pci_resume(struct pci_dev *pdev)
8289 {
8290         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8291
8292         pci_set_power_state(pdev, PCI_D0);
8293
8294         if (priv->is_open)
8295                 iwl3945_mac_start(priv->hw);
8296
8297         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8298         return 0;
8299 }
8300
8301 #endif /* CONFIG_PM */
8302
8303 /*****************************************************************************
8304  *
8305  * driver and module entry point
8306  *
8307  *****************************************************************************/
8308
8309 static struct pci_driver iwl3945_driver = {
8310         .name = DRV_NAME,
8311         .id_table = iwl3945_hw_card_ids,
8312         .probe = iwl3945_pci_probe,
8313         .remove = __devexit_p(iwl3945_pci_remove),
8314 #ifdef CONFIG_PM
8315         .suspend = iwl3945_pci_suspend,
8316         .resume = iwl3945_pci_resume,
8317 #endif
8318 };
8319
8320 static int __init iwl3945_init(void)
8321 {
8322
8323         int ret;
8324         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8325         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8326
8327         ret = iwl3945_rate_control_register();
8328         if (ret) {
8329                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8330                 return ret;
8331         }
8332
8333         ret = pci_register_driver(&iwl3945_driver);
8334         if (ret) {
8335                 IWL_ERROR("Unable to initialize PCI module\n");
8336                 goto error_register;
8337         }
8338 #ifdef CONFIG_IWL3945_DEBUG
8339         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8340         if (ret) {
8341                 IWL_ERROR("Unable to create driver sysfs file\n");
8342                 goto error_debug;
8343         }
8344 #endif
8345
8346         return ret;
8347
8348 #ifdef CONFIG_IWL3945_DEBUG
8349 error_debug:
8350         pci_unregister_driver(&iwl3945_driver);
8351 #endif
8352 error_register:
8353         iwl3945_rate_control_unregister();
8354         return ret;
8355 }
8356
8357 static void __exit iwl3945_exit(void)
8358 {
8359 #ifdef CONFIG_IWL3945_DEBUG
8360         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8361 #endif
8362         pci_unregister_driver(&iwl3945_driver);
8363         iwl3945_rate_control_unregister();
8364 }
8365
8366 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8367 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8368 module_param_named(disable, iwl3945_param_disable, int, 0444);
8369 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8370 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8371 MODULE_PARM_DESC(hwcrypto,
8372                  "using hardware crypto engine (default 0 [software])\n");
8373 module_param_named(debug, iwl3945_param_debug, int, 0444);
8374 MODULE_PARM_DESC(debug, "debug output mask");
8375 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8376 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8377
8378 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8379 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8380
8381 /* QoS */
8382 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8383 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8384
8385 module_exit(iwl3945_exit);
8386 module_init(iwl3945_init);