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 =
2395             &priv->stations[ctl->hw_key->hw_key_idx].keyinfo;
2396
2397         switch (keyinfo->alg) {
2398         case ALG_CCMP:
2399                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2400                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2401                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2402                 break;
2403
2404         case ALG_TKIP:
2405 #if 0
2406                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2407
2408                 if (last_frag)
2409                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2410                                8);
2411                 else
2412                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2413 #endif
2414                 break;
2415
2416         case ALG_WEP:
2417                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2418                     (ctl->hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2419
2420                 if (keyinfo->keylen == 13)
2421                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2422
2423                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2424
2425                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2426                              "with key %d\n", ctl->hw_key->hw_key_idx);
2427                 break;
2428
2429         default:
2430                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2431                 break;
2432         }
2433 }
2434
2435 /*
2436  * handle build REPLY_TX command notification.
2437  */
2438 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2439                                   struct iwl3945_cmd *cmd,
2440                                   struct ieee80211_tx_control *ctrl,
2441                                   struct ieee80211_hdr *hdr,
2442                                   int is_unicast, u8 std_id)
2443 {
2444         __le16 *qc;
2445         u16 fc = le16_to_cpu(hdr->frame_control);
2446         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2447
2448         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2449         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2450                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2451                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2452                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2453                 if (ieee80211_is_probe_response(fc) &&
2454                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2455                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2456         } else {
2457                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2458                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2459         }
2460
2461         cmd->cmd.tx.sta_id = std_id;
2462         if (ieee80211_get_morefrag(hdr))
2463                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2464
2465         qc = ieee80211_get_qos_ctrl(hdr);
2466         if (qc) {
2467                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2468                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2469         } else
2470                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2471
2472         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2473                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2474                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2475         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2476                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2477                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2478         }
2479
2480         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2481                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2482
2483         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2484         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2485                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2486                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2487                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2488                 else
2489                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2490         } else {
2491                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2492 #ifdef CONFIG_IWL3945_LEDS
2493                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2494 #endif
2495         }
2496
2497         cmd->cmd.tx.driver_txop = 0;
2498         cmd->cmd.tx.tx_flags = tx_flags;
2499         cmd->cmd.tx.next_frame_len = 0;
2500 }
2501
2502 /**
2503  * iwl3945_get_sta_id - Find station's index within station table
2504  */
2505 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2506 {
2507         int sta_id;
2508         u16 fc = le16_to_cpu(hdr->frame_control);
2509
2510         /* If this frame is broadcast or management, use broadcast station id */
2511         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2512             is_multicast_ether_addr(hdr->addr1))
2513                 return priv->hw_setting.bcast_sta_id;
2514
2515         switch (priv->iw_mode) {
2516
2517         /* If we are a client station in a BSS network, use the special
2518          * AP station entry (that's the only station we communicate with) */
2519         case IEEE80211_IF_TYPE_STA:
2520                 return IWL_AP_ID;
2521
2522         /* If we are an AP, then find the station, or use BCAST */
2523         case IEEE80211_IF_TYPE_AP:
2524                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2525                 if (sta_id != IWL_INVALID_STATION)
2526                         return sta_id;
2527                 return priv->hw_setting.bcast_sta_id;
2528
2529         /* If this frame is going out to an IBSS network, find the station,
2530          * or create a new station table entry */
2531         case IEEE80211_IF_TYPE_IBSS: {
2532                 DECLARE_MAC_BUF(mac);
2533
2534                 /* Create new station table entry */
2535                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2536                 if (sta_id != IWL_INVALID_STATION)
2537                         return sta_id;
2538
2539                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2540
2541                 if (sta_id != IWL_INVALID_STATION)
2542                         return sta_id;
2543
2544                 IWL_DEBUG_DROP("Station %s not in station map. "
2545                                "Defaulting to broadcast...\n",
2546                                print_mac(mac, hdr->addr1));
2547                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2548                 return priv->hw_setting.bcast_sta_id;
2549         }
2550         default:
2551                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2552                 return priv->hw_setting.bcast_sta_id;
2553         }
2554 }
2555
2556 /*
2557  * start REPLY_TX command process
2558  */
2559 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2560                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2561 {
2562         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2563         struct iwl3945_tfd_frame *tfd;
2564         u32 *control_flags;
2565         int txq_id = ctl->queue;
2566         struct iwl3945_tx_queue *txq = NULL;
2567         struct iwl3945_queue *q = NULL;
2568         dma_addr_t phys_addr;
2569         dma_addr_t txcmd_phys;
2570         struct iwl3945_cmd *out_cmd = NULL;
2571         u16 len, idx, len_org;
2572         u8 id, hdr_len, unicast;
2573         u8 sta_id;
2574         u16 seq_number = 0;
2575         u16 fc;
2576         __le16 *qc;
2577         u8 wait_write_ptr = 0;
2578         unsigned long flags;
2579         int rc;
2580
2581         spin_lock_irqsave(&priv->lock, flags);
2582         if (iwl3945_is_rfkill(priv)) {
2583                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2584                 goto drop_unlock;
2585         }
2586
2587         if (!priv->vif) {
2588                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2589                 goto drop_unlock;
2590         }
2591
2592         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2593                 IWL_ERROR("ERROR: No TX rate available.\n");
2594                 goto drop_unlock;
2595         }
2596
2597         unicast = !is_multicast_ether_addr(hdr->addr1);
2598         id = 0;
2599
2600         fc = le16_to_cpu(hdr->frame_control);
2601
2602 #ifdef CONFIG_IWL3945_DEBUG
2603         if (ieee80211_is_auth(fc))
2604                 IWL_DEBUG_TX("Sending AUTH frame\n");
2605         else if (ieee80211_is_assoc_request(fc))
2606                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2607         else if (ieee80211_is_reassoc_request(fc))
2608                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2609 #endif
2610
2611         /* drop all data frame if we are not associated */
2612         if ((!iwl3945_is_associated(priv) ||
2613              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id)) &&
2614             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2615                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2616                 goto drop_unlock;
2617         }
2618
2619         spin_unlock_irqrestore(&priv->lock, flags);
2620
2621         hdr_len = ieee80211_get_hdrlen(fc);
2622
2623         /* Find (or create) index into station table for destination station */
2624         sta_id = iwl3945_get_sta_id(priv, hdr);
2625         if (sta_id == IWL_INVALID_STATION) {
2626                 DECLARE_MAC_BUF(mac);
2627
2628                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2629                                print_mac(mac, hdr->addr1));
2630                 goto drop;
2631         }
2632
2633         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2634
2635         qc = ieee80211_get_qos_ctrl(hdr);
2636         if (qc) {
2637                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2638                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2639                                 IEEE80211_SCTL_SEQ;
2640                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2641                         (hdr->seq_ctrl &
2642                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2643                 seq_number += 0x10;
2644         }
2645
2646         /* Descriptor for chosen Tx queue */
2647         txq = &priv->txq[txq_id];
2648         q = &txq->q;
2649
2650         spin_lock_irqsave(&priv->lock, flags);
2651
2652         /* Set up first empty TFD within this queue's circular TFD buffer */
2653         tfd = &txq->bd[q->write_ptr];
2654         memset(tfd, 0, sizeof(*tfd));
2655         control_flags = (u32 *) tfd;
2656         idx = get_cmd_index(q, q->write_ptr, 0);
2657
2658         /* Set up driver data for this TFD */
2659         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2660         txq->txb[q->write_ptr].skb[0] = skb;
2661         memcpy(&(txq->txb[q->write_ptr].status.control),
2662                ctl, sizeof(struct ieee80211_tx_control));
2663
2664         /* Init first empty entry in queue's array of Tx/cmd buffers */
2665         out_cmd = &txq->cmd[idx];
2666         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2667         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2668
2669         /*
2670          * Set up the Tx-command (not MAC!) header.
2671          * Store the chosen Tx queue and TFD index within the sequence field;
2672          * after Tx, uCode's Tx response will return this value so driver can
2673          * locate the frame within the tx queue and do post-tx processing.
2674          */
2675         out_cmd->hdr.cmd = REPLY_TX;
2676         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2677                                 INDEX_TO_SEQ(q->write_ptr)));
2678
2679         /* Copy MAC header from skb into command buffer */
2680         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2681
2682         /*
2683          * Use the first empty entry in this queue's command buffer array
2684          * to contain the Tx command and MAC header concatenated together
2685          * (payload data will be in another buffer).
2686          * Size of this varies, due to varying MAC header length.
2687          * If end is not dword aligned, we'll have 2 extra bytes at the end
2688          * of the MAC header (device reads on dword boundaries).
2689          * We'll tell device about this padding later.
2690          */
2691         len = priv->hw_setting.tx_cmd_len +
2692                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2693
2694         len_org = len;
2695         len = (len + 3) & ~3;
2696
2697         if (len_org != len)
2698                 len_org = 1;
2699         else
2700                 len_org = 0;
2701
2702         /* Physical address of this Tx command's header (not MAC header!),
2703          * within command buffer array. */
2704         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2705                      offsetof(struct iwl3945_cmd, hdr);
2706
2707         /* Add buffer containing Tx command and MAC(!) header to TFD's
2708          * first entry */
2709         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2710
2711         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2712                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2713
2714         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2715          * if any (802.11 null frames have no payload). */
2716         len = skb->len - hdr_len;
2717         if (len) {
2718                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2719                                            len, PCI_DMA_TODEVICE);
2720                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2721         }
2722
2723         if (!len)
2724                 /* If there is no payload, then we use only one Tx buffer */
2725                 *control_flags = TFD_CTL_COUNT_SET(1);
2726         else
2727                 /* Else use 2 buffers.
2728                  * Tell 3945 about any padding after MAC header */
2729                 *control_flags = TFD_CTL_COUNT_SET(2) |
2730                         TFD_CTL_PAD_SET(U32_PAD(len));
2731
2732         /* Total # bytes to be transmitted */
2733         len = (u16)skb->len;
2734         out_cmd->cmd.tx.len = cpu_to_le16(len);
2735
2736         /* TODO need this for burst mode later on */
2737         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2738
2739         /* set is_hcca to 0; it probably will never be implemented */
2740         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2741
2742         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2743         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2744
2745         if (!ieee80211_get_morefrag(hdr)) {
2746                 txq->need_update = 1;
2747                 if (qc) {
2748                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2749                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2750                 }
2751         } else {
2752                 wait_write_ptr = 1;
2753                 txq->need_update = 0;
2754         }
2755
2756         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2757                            sizeof(out_cmd->cmd.tx));
2758
2759         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2760                            ieee80211_get_hdrlen(fc));
2761
2762         /* Tell device the write index *just past* this latest filled TFD */
2763         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2764         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2765         spin_unlock_irqrestore(&priv->lock, flags);
2766
2767         if (rc)
2768                 return rc;
2769
2770         if ((iwl3945_queue_space(q) < q->high_mark)
2771             && priv->mac80211_registered) {
2772                 if (wait_write_ptr) {
2773                         spin_lock_irqsave(&priv->lock, flags);
2774                         txq->need_update = 1;
2775                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2776                         spin_unlock_irqrestore(&priv->lock, flags);
2777                 }
2778
2779                 ieee80211_stop_queue(priv->hw, ctl->queue);
2780         }
2781
2782         return 0;
2783
2784 drop_unlock:
2785         spin_unlock_irqrestore(&priv->lock, flags);
2786 drop:
2787         return -1;
2788 }
2789
2790 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2791 {
2792         const struct ieee80211_supported_band *sband = NULL;
2793         struct ieee80211_rate *rate;
2794         int i;
2795
2796         sband = iwl3945_get_band(priv, priv->band);
2797         if (!sband) {
2798                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2799                 return;
2800         }
2801
2802         priv->active_rate = 0;
2803         priv->active_rate_basic = 0;
2804
2805         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2806                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2807
2808         for (i = 0; i < sband->n_bitrates; i++) {
2809                 rate = &sband->bitrates[i];
2810                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2811                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2812                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2813                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2814                         priv->active_rate |= (1 << rate->hw_value);
2815                 }
2816         }
2817
2818         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2819                        priv->active_rate, priv->active_rate_basic);
2820
2821         /*
2822          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2823          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2824          * OFDM
2825          */
2826         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2827                 priv->staging_rxon.cck_basic_rates =
2828                     ((priv->active_rate_basic &
2829                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2830         else
2831                 priv->staging_rxon.cck_basic_rates =
2832                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2833
2834         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2835                 priv->staging_rxon.ofdm_basic_rates =
2836                     ((priv->active_rate_basic &
2837                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2838                       IWL_FIRST_OFDM_RATE) & 0xFF;
2839         else
2840                 priv->staging_rxon.ofdm_basic_rates =
2841                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2842 }
2843
2844 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2845 {
2846         unsigned long flags;
2847
2848         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2849                 return;
2850
2851         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2852                           disable_radio ? "OFF" : "ON");
2853
2854         if (disable_radio) {
2855                 iwl3945_scan_cancel(priv);
2856                 /* FIXME: This is a workaround for AP */
2857                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2858                         spin_lock_irqsave(&priv->lock, flags);
2859                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2860                                     CSR_UCODE_SW_BIT_RFKILL);
2861                         spin_unlock_irqrestore(&priv->lock, flags);
2862                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2863                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2864                 }
2865                 return;
2866         }
2867
2868         spin_lock_irqsave(&priv->lock, flags);
2869         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2870
2871         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2872         spin_unlock_irqrestore(&priv->lock, flags);
2873
2874         /* wake up ucode */
2875         msleep(10);
2876
2877         spin_lock_irqsave(&priv->lock, flags);
2878         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2879         if (!iwl3945_grab_nic_access(priv))
2880                 iwl3945_release_nic_access(priv);
2881         spin_unlock_irqrestore(&priv->lock, flags);
2882
2883         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2884                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2885                                   "disabled by HW switch\n");
2886                 return;
2887         }
2888
2889         queue_work(priv->workqueue, &priv->restart);
2890         return;
2891 }
2892
2893 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2894                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2895 {
2896         u16 fc =
2897             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2898
2899         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2900                 return;
2901
2902         if (!(fc & IEEE80211_FCTL_PROTECTED))
2903                 return;
2904
2905         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2906         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2907         case RX_RES_STATUS_SEC_TYPE_TKIP:
2908                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2909                     RX_RES_STATUS_BAD_ICV_MIC)
2910                         stats->flag |= RX_FLAG_MMIC_ERROR;
2911         case RX_RES_STATUS_SEC_TYPE_WEP:
2912         case RX_RES_STATUS_SEC_TYPE_CCMP:
2913                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2914                     RX_RES_STATUS_DECRYPT_OK) {
2915                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2916                         stats->flag |= RX_FLAG_DECRYPTED;
2917                 }
2918                 break;
2919
2920         default:
2921                 break;
2922         }
2923 }
2924
2925 #define IWL_PACKET_RETRY_TIME HZ
2926
2927 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2928 {
2929         u16 sc = le16_to_cpu(header->seq_ctrl);
2930         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2931         u16 frag = sc & IEEE80211_SCTL_FRAG;
2932         u16 *last_seq, *last_frag;
2933         unsigned long *last_time;
2934
2935         switch (priv->iw_mode) {
2936         case IEEE80211_IF_TYPE_IBSS:{
2937                 struct list_head *p;
2938                 struct iwl3945_ibss_seq *entry = NULL;
2939                 u8 *mac = header->addr2;
2940                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2941
2942                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2943                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
2944                         if (!compare_ether_addr(entry->mac, mac))
2945                                 break;
2946                 }
2947                 if (p == &priv->ibss_mac_hash[index]) {
2948                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2949                         if (!entry) {
2950                                 IWL_ERROR("Cannot malloc new mac entry\n");
2951                                 return 0;
2952                         }
2953                         memcpy(entry->mac, mac, ETH_ALEN);
2954                         entry->seq_num = seq;
2955                         entry->frag_num = frag;
2956                         entry->packet_time = jiffies;
2957                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2958                         return 0;
2959                 }
2960                 last_seq = &entry->seq_num;
2961                 last_frag = &entry->frag_num;
2962                 last_time = &entry->packet_time;
2963                 break;
2964         }
2965         case IEEE80211_IF_TYPE_STA:
2966                 last_seq = &priv->last_seq_num;
2967                 last_frag = &priv->last_frag_num;
2968                 last_time = &priv->last_packet_time;
2969                 break;
2970         default:
2971                 return 0;
2972         }
2973         if ((*last_seq == seq) &&
2974             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2975                 if (*last_frag == frag)
2976                         goto drop;
2977                 if (*last_frag + 1 != frag)
2978                         /* out-of-order fragment */
2979                         goto drop;
2980         } else
2981                 *last_seq = seq;
2982
2983         *last_frag = frag;
2984         *last_time = jiffies;
2985         return 0;
2986
2987  drop:
2988         return 1;
2989 }
2990
2991 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2992
2993 #include "iwl-spectrum.h"
2994
2995 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2996 #define BEACON_TIME_MASK_HIGH   0xFF000000
2997 #define TIME_UNIT               1024
2998
2999 /*
3000  * extended beacon time format
3001  * time in usec will be changed into a 32-bit value in 8:24 format
3002  * the high 1 byte is the beacon counts
3003  * the lower 3 bytes is the time in usec within one beacon interval
3004  */
3005
3006 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3007 {
3008         u32 quot;
3009         u32 rem;
3010         u32 interval = beacon_interval * 1024;
3011
3012         if (!interval || !usec)
3013                 return 0;
3014
3015         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3016         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3017
3018         return (quot << 24) + rem;
3019 }
3020
3021 /* base is usually what we get from ucode with each received frame,
3022  * the same as HW timer counter counting down
3023  */
3024
3025 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3026 {
3027         u32 base_low = base & BEACON_TIME_MASK_LOW;
3028         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3029         u32 interval = beacon_interval * TIME_UNIT;
3030         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3031             (addon & BEACON_TIME_MASK_HIGH);
3032
3033         if (base_low > addon_low)
3034                 res += base_low - addon_low;
3035         else if (base_low < addon_low) {
3036                 res += interval + base_low - addon_low;
3037                 res += (1 << 24);
3038         } else
3039                 res += (1 << 24);
3040
3041         return cpu_to_le32(res);
3042 }
3043
3044 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3045                                struct ieee80211_measurement_params *params,
3046                                u8 type)
3047 {
3048         struct iwl3945_spectrum_cmd spectrum;
3049         struct iwl3945_rx_packet *res;
3050         struct iwl3945_host_cmd cmd = {
3051                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3052                 .data = (void *)&spectrum,
3053                 .meta.flags = CMD_WANT_SKB,
3054         };
3055         u32 add_time = le64_to_cpu(params->start_time);
3056         int rc;
3057         int spectrum_resp_status;
3058         int duration = le16_to_cpu(params->duration);
3059
3060         if (iwl3945_is_associated(priv))
3061                 add_time =
3062                     iwl3945_usecs_to_beacons(
3063                         le64_to_cpu(params->start_time) - priv->last_tsf,
3064                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3065
3066         memset(&spectrum, 0, sizeof(spectrum));
3067
3068         spectrum.channel_count = cpu_to_le16(1);
3069         spectrum.flags =
3070             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3071         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3072         cmd.len = sizeof(spectrum);
3073         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3074
3075         if (iwl3945_is_associated(priv))
3076                 spectrum.start_time =
3077                     iwl3945_add_beacon_time(priv->last_beacon_time,
3078                                 add_time,
3079                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3080         else
3081                 spectrum.start_time = 0;
3082
3083         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3084         spectrum.channels[0].channel = params->channel;
3085         spectrum.channels[0].type = type;
3086         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3087                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3088                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3089
3090         rc = iwl3945_send_cmd_sync(priv, &cmd);
3091         if (rc)
3092                 return rc;
3093
3094         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3095         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3096                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3097                 rc = -EIO;
3098         }
3099
3100         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3101         switch (spectrum_resp_status) {
3102         case 0:         /* Command will be handled */
3103                 if (res->u.spectrum.id != 0xff) {
3104                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3105                                                 res->u.spectrum.id);
3106                         priv->measurement_status &= ~MEASUREMENT_READY;
3107                 }
3108                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3109                 rc = 0;
3110                 break;
3111
3112         case 1:         /* Command will not be handled */
3113                 rc = -EAGAIN;
3114                 break;
3115         }
3116
3117         dev_kfree_skb_any(cmd.meta.u.skb);
3118
3119         return rc;
3120 }
3121 #endif
3122
3123 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3124                                struct iwl3945_rx_mem_buffer *rxb)
3125 {
3126         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3127         struct iwl3945_alive_resp *palive;
3128         struct delayed_work *pwork;
3129
3130         palive = &pkt->u.alive_frame;
3131
3132         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3133                        "0x%01X 0x%01X\n",
3134                        palive->is_valid, palive->ver_type,
3135                        palive->ver_subtype);
3136
3137         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3138                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3139                 memcpy(&priv->card_alive_init,
3140                        &pkt->u.alive_frame,
3141                        sizeof(struct iwl3945_init_alive_resp));
3142                 pwork = &priv->init_alive_start;
3143         } else {
3144                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3145                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3146                        sizeof(struct iwl3945_alive_resp));
3147                 pwork = &priv->alive_start;
3148                 iwl3945_disable_events(priv);
3149         }
3150
3151         /* We delay the ALIVE response by 5ms to
3152          * give the HW RF Kill time to activate... */
3153         if (palive->is_valid == UCODE_VALID_OK)
3154                 queue_delayed_work(priv->workqueue, pwork,
3155                                    msecs_to_jiffies(5));
3156         else
3157                 IWL_WARNING("uCode did not respond OK.\n");
3158 }
3159
3160 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3161                                  struct iwl3945_rx_mem_buffer *rxb)
3162 {
3163         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3164
3165         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3166         return;
3167 }
3168
3169 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3170                                struct iwl3945_rx_mem_buffer *rxb)
3171 {
3172         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3173
3174         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3175                 "seq 0x%04X ser 0x%08X\n",
3176                 le32_to_cpu(pkt->u.err_resp.error_type),
3177                 get_cmd_string(pkt->u.err_resp.cmd_id),
3178                 pkt->u.err_resp.cmd_id,
3179                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3180                 le32_to_cpu(pkt->u.err_resp.error_info));
3181 }
3182
3183 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3184
3185 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3186 {
3187         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3188         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3189         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3190         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3191                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3192         rxon->channel = csa->channel;
3193         priv->staging_rxon.channel = csa->channel;
3194 }
3195
3196 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3197                                           struct iwl3945_rx_mem_buffer *rxb)
3198 {
3199 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3200         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3201         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3202
3203         if (!report->state) {
3204                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3205                           "Spectrum Measure Notification: Start\n");
3206                 return;
3207         }
3208
3209         memcpy(&priv->measure_report, report, sizeof(*report));
3210         priv->measurement_status |= MEASUREMENT_READY;
3211 #endif
3212 }
3213
3214 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3215                                   struct iwl3945_rx_mem_buffer *rxb)
3216 {
3217 #ifdef CONFIG_IWL3945_DEBUG
3218         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3219         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3220         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3221                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3222 #endif
3223 }
3224
3225 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3226                                              struct iwl3945_rx_mem_buffer *rxb)
3227 {
3228         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3229         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3230                         "notification for %s:\n",
3231                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3232         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3233 }
3234
3235 static void iwl3945_bg_beacon_update(struct work_struct *work)
3236 {
3237         struct iwl3945_priv *priv =
3238                 container_of(work, struct iwl3945_priv, beacon_update);
3239         struct sk_buff *beacon;
3240
3241         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3242         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3243
3244         if (!beacon) {
3245                 IWL_ERROR("update beacon failed\n");
3246                 return;
3247         }
3248
3249         mutex_lock(&priv->mutex);
3250         /* new beacon skb is allocated every time; dispose previous.*/
3251         if (priv->ibss_beacon)
3252                 dev_kfree_skb(priv->ibss_beacon);
3253
3254         priv->ibss_beacon = beacon;
3255         mutex_unlock(&priv->mutex);
3256
3257         iwl3945_send_beacon_cmd(priv);
3258 }
3259
3260 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3261                                 struct iwl3945_rx_mem_buffer *rxb)
3262 {
3263 #ifdef CONFIG_IWL3945_DEBUG
3264         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3265         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3266         u8 rate = beacon->beacon_notify_hdr.rate;
3267
3268         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3269                 "tsf %d %d rate %d\n",
3270                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3271                 beacon->beacon_notify_hdr.failure_frame,
3272                 le32_to_cpu(beacon->ibss_mgr_status),
3273                 le32_to_cpu(beacon->high_tsf),
3274                 le32_to_cpu(beacon->low_tsf), rate);
3275 #endif
3276
3277         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3278             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3279                 queue_work(priv->workqueue, &priv->beacon_update);
3280 }
3281
3282 /* Service response to REPLY_SCAN_CMD (0x80) */
3283 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3284                               struct iwl3945_rx_mem_buffer *rxb)
3285 {
3286 #ifdef CONFIG_IWL3945_DEBUG
3287         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3288         struct iwl3945_scanreq_notification *notif =
3289             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3290
3291         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3292 #endif
3293 }
3294
3295 /* Service SCAN_START_NOTIFICATION (0x82) */
3296 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3297                                     struct iwl3945_rx_mem_buffer *rxb)
3298 {
3299         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3300         struct iwl3945_scanstart_notification *notif =
3301             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3302         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3303         IWL_DEBUG_SCAN("Scan start: "
3304                        "%d [802.11%s] "
3305                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3306                        notif->channel,
3307                        notif->band ? "bg" : "a",
3308                        notif->tsf_high,
3309                        notif->tsf_low, notif->status, notif->beacon_timer);
3310 }
3311
3312 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3313 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3314                                       struct iwl3945_rx_mem_buffer *rxb)
3315 {
3316         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3317         struct iwl3945_scanresults_notification *notif =
3318             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3319
3320         IWL_DEBUG_SCAN("Scan ch.res: "
3321                        "%d [802.11%s] "
3322                        "(TSF: 0x%08X:%08X) - %d "
3323                        "elapsed=%lu usec (%dms since last)\n",
3324                        notif->channel,
3325                        notif->band ? "bg" : "a",
3326                        le32_to_cpu(notif->tsf_high),
3327                        le32_to_cpu(notif->tsf_low),
3328                        le32_to_cpu(notif->statistics[0]),
3329                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3330                        jiffies_to_msecs(elapsed_jiffies
3331                                         (priv->last_scan_jiffies, jiffies)));
3332
3333         priv->last_scan_jiffies = jiffies;
3334         priv->next_scan_jiffies = 0;
3335 }
3336
3337 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3338 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3339                                        struct iwl3945_rx_mem_buffer *rxb)
3340 {
3341         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3342         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3343
3344         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3345                        scan_notif->scanned_channels,
3346                        scan_notif->tsf_low,
3347                        scan_notif->tsf_high, scan_notif->status);
3348
3349         /* The HW is no longer scanning */
3350         clear_bit(STATUS_SCAN_HW, &priv->status);
3351
3352         /* The scan completion notification came in, so kill that timer... */
3353         cancel_delayed_work(&priv->scan_check);
3354
3355         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3356                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3357                        jiffies_to_msecs(elapsed_jiffies
3358                                         (priv->scan_pass_start, jiffies)));
3359
3360         /* Remove this scanned band from the list
3361          * of pending bands to scan */
3362         priv->scan_bands--;
3363
3364         /* If a request to abort was given, or the scan did not succeed
3365          * then we reset the scan state machine and terminate,
3366          * re-queuing another scan if one has been requested */
3367         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3368                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3369                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3370         } else {
3371                 /* If there are more bands on this scan pass reschedule */
3372                 if (priv->scan_bands > 0)
3373                         goto reschedule;
3374         }
3375
3376         priv->last_scan_jiffies = jiffies;
3377         priv->next_scan_jiffies = 0;
3378         IWL_DEBUG_INFO("Setting scan to off\n");
3379
3380         clear_bit(STATUS_SCANNING, &priv->status);
3381
3382         IWL_DEBUG_INFO("Scan took %dms\n",
3383                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3384
3385         queue_work(priv->workqueue, &priv->scan_completed);
3386
3387         return;
3388
3389 reschedule:
3390         priv->scan_pass_start = jiffies;
3391         queue_work(priv->workqueue, &priv->request_scan);
3392 }
3393
3394 /* Handle notification from uCode that card's power state is changing
3395  * due to software, hardware, or critical temperature RFKILL */
3396 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3397                                     struct iwl3945_rx_mem_buffer *rxb)
3398 {
3399         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3400         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3401         unsigned long status = priv->status;
3402
3403         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3404                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3405                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3406
3407         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3408                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3409
3410         if (flags & HW_CARD_DISABLED)
3411                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3412         else
3413                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3414
3415
3416         if (flags & SW_CARD_DISABLED)
3417                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3418         else
3419                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3420
3421         iwl3945_scan_cancel(priv);
3422
3423         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3424              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3425             (test_bit(STATUS_RF_KILL_SW, &status) !=
3426              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3427                 queue_work(priv->workqueue, &priv->rf_kill);
3428         else
3429                 wake_up_interruptible(&priv->wait_command_queue);
3430 }
3431
3432 /**
3433  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3434  *
3435  * Setup the RX handlers for each of the reply types sent from the uCode
3436  * to the host.
3437  *
3438  * This function chains into the hardware specific files for them to setup
3439  * any hardware specific handlers as well.
3440  */
3441 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3442 {
3443         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3444         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3445         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3446         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3447         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3448             iwl3945_rx_spectrum_measure_notif;
3449         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3450         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3451             iwl3945_rx_pm_debug_statistics_notif;
3452         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3453
3454         /*
3455          * The same handler is used for both the REPLY to a discrete
3456          * statistics request from the host as well as for the periodic
3457          * statistics notifications (after received beacons) from the uCode.
3458          */
3459         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3460         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3461
3462         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3463         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3464         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3465             iwl3945_rx_scan_results_notif;
3466         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3467             iwl3945_rx_scan_complete_notif;
3468         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3469
3470         /* Set up hardware specific Rx handlers */
3471         iwl3945_hw_rx_handler_setup(priv);
3472 }
3473
3474 /**
3475  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3476  * When FW advances 'R' index, all entries between old and new 'R' index
3477  * need to be reclaimed.
3478  */
3479 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3480                                       int txq_id, int index)
3481 {
3482         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3483         struct iwl3945_queue *q = &txq->q;
3484         int nfreed = 0;
3485
3486         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3487                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3488                           "is out of range [0-%d] %d %d.\n", txq_id,
3489                           index, q->n_bd, q->write_ptr, q->read_ptr);
3490                 return;
3491         }
3492
3493         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3494                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3495                 if (nfreed > 1) {
3496                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3497                                         q->write_ptr, q->read_ptr);
3498                         queue_work(priv->workqueue, &priv->restart);
3499                         break;
3500                 }
3501                 nfreed++;
3502         }
3503 }
3504
3505
3506 /**
3507  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3508  * @rxb: Rx buffer to reclaim
3509  *
3510  * If an Rx buffer has an async callback associated with it the callback
3511  * will be executed.  The attached skb (if present) will only be freed
3512  * if the callback returns 1
3513  */
3514 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3515                                 struct iwl3945_rx_mem_buffer *rxb)
3516 {
3517         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3518         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3519         int txq_id = SEQ_TO_QUEUE(sequence);
3520         int index = SEQ_TO_INDEX(sequence);
3521         int huge = sequence & SEQ_HUGE_FRAME;
3522         int cmd_index;
3523         struct iwl3945_cmd *cmd;
3524
3525         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3526
3527         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3528         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3529
3530         /* Input error checking is done when commands are added to queue. */
3531         if (cmd->meta.flags & CMD_WANT_SKB) {
3532                 cmd->meta.source->u.skb = rxb->skb;
3533                 rxb->skb = NULL;
3534         } else if (cmd->meta.u.callback &&
3535                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3536                 rxb->skb = NULL;
3537
3538         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3539
3540         if (!(cmd->meta.flags & CMD_ASYNC)) {
3541                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3542                 wake_up_interruptible(&priv->wait_command_queue);
3543         }
3544 }
3545
3546 /************************** RX-FUNCTIONS ****************************/
3547 /*
3548  * Rx theory of operation
3549  *
3550  * The host allocates 32 DMA target addresses and passes the host address
3551  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3552  * 0 to 31
3553  *
3554  * Rx Queue Indexes
3555  * The host/firmware share two index registers for managing the Rx buffers.
3556  *
3557  * The READ index maps to the first position that the firmware may be writing
3558  * to -- the driver can read up to (but not including) this position and get
3559  * good data.
3560  * The READ index is managed by the firmware once the card is enabled.
3561  *
3562  * The WRITE index maps to the last position the driver has read from -- the
3563  * position preceding WRITE is the last slot the firmware can place a packet.
3564  *
3565  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3566  * WRITE = READ.
3567  *
3568  * During initialization, the host sets up the READ queue position to the first
3569  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3570  *
3571  * When the firmware places a packet in a buffer, it will advance the READ index
3572  * and fire the RX interrupt.  The driver can then query the READ index and
3573  * process as many packets as possible, moving the WRITE index forward as it
3574  * resets the Rx queue buffers with new memory.
3575  *
3576  * The management in the driver is as follows:
3577  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3578  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3579  *   to replenish the iwl->rxq->rx_free.
3580  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3581  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3582  *   'processed' and 'read' driver indexes as well)
3583  * + A received packet is processed and handed to the kernel network stack,
3584  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3585  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3586  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3587  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3588  *   were enough free buffers and RX_STALLED is set it is cleared.
3589  *
3590  *
3591  * Driver sequence:
3592  *
3593  * iwl3945_rx_queue_alloc()   Allocates rx_free
3594  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3595  *                            iwl3945_rx_queue_restock
3596  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3597  *                            queue, updates firmware pointers, and updates
3598  *                            the WRITE index.  If insufficient rx_free buffers
3599  *                            are available, schedules iwl3945_rx_replenish
3600  *
3601  * -- enable interrupts --
3602  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3603  *                            READ INDEX, detaching the SKB from the pool.
3604  *                            Moves the packet buffer from queue to rx_used.
3605  *                            Calls iwl3945_rx_queue_restock to refill any empty
3606  *                            slots.
3607  * ...
3608  *
3609  */
3610
3611 /**
3612  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3613  */
3614 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3615 {
3616         int s = q->read - q->write;
3617         if (s <= 0)
3618                 s += RX_QUEUE_SIZE;
3619         /* keep some buffer to not confuse full and empty queue */
3620         s -= 2;
3621         if (s < 0)
3622                 s = 0;
3623         return s;
3624 }
3625
3626 /**
3627  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3628  */
3629 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3630 {
3631         u32 reg = 0;
3632         int rc = 0;
3633         unsigned long flags;
3634
3635         spin_lock_irqsave(&q->lock, flags);
3636
3637         if (q->need_update == 0)
3638                 goto exit_unlock;
3639
3640         /* If power-saving is in use, make sure device is awake */
3641         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3642                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3643
3644                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3645                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3646                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3647                         goto exit_unlock;
3648                 }
3649
3650                 rc = iwl3945_grab_nic_access(priv);
3651                 if (rc)
3652                         goto exit_unlock;
3653
3654                 /* Device expects a multiple of 8 */
3655                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3656                                      q->write & ~0x7);
3657                 iwl3945_release_nic_access(priv);
3658
3659         /* Else device is assumed to be awake */
3660         } else
3661                 /* Device expects a multiple of 8 */
3662                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3663
3664
3665         q->need_update = 0;
3666
3667  exit_unlock:
3668         spin_unlock_irqrestore(&q->lock, flags);
3669         return rc;
3670 }
3671
3672 /**
3673  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3674  */
3675 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3676                                           dma_addr_t dma_addr)
3677 {
3678         return cpu_to_le32((u32)dma_addr);
3679 }
3680
3681 /**
3682  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3683  *
3684  * If there are slots in the RX queue that need to be restocked,
3685  * and we have free pre-allocated buffers, fill the ranks as much
3686  * as we can, pulling from rx_free.
3687  *
3688  * This moves the 'write' index forward to catch up with 'processed', and
3689  * also updates the memory address in the firmware to reference the new
3690  * target buffer.
3691  */
3692 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3693 {
3694         struct iwl3945_rx_queue *rxq = &priv->rxq;
3695         struct list_head *element;
3696         struct iwl3945_rx_mem_buffer *rxb;
3697         unsigned long flags;
3698         int write, rc;
3699
3700         spin_lock_irqsave(&rxq->lock, flags);
3701         write = rxq->write & ~0x7;
3702         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3703                 /* Get next free Rx buffer, remove from free list */
3704                 element = rxq->rx_free.next;
3705                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3706                 list_del(element);
3707
3708                 /* Point to Rx buffer via next RBD in circular buffer */
3709                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3710                 rxq->queue[rxq->write] = rxb;
3711                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3712                 rxq->free_count--;
3713         }
3714         spin_unlock_irqrestore(&rxq->lock, flags);
3715         /* If the pre-allocated buffer pool is dropping low, schedule to
3716          * refill it */
3717         if (rxq->free_count <= RX_LOW_WATERMARK)
3718                 queue_work(priv->workqueue, &priv->rx_replenish);
3719
3720
3721         /* If we've added more space for the firmware to place data, tell it.
3722          * Increment device's write pointer in multiples of 8. */
3723         if ((write != (rxq->write & ~0x7))
3724             || (abs(rxq->write - rxq->read) > 7)) {
3725                 spin_lock_irqsave(&rxq->lock, flags);
3726                 rxq->need_update = 1;
3727                 spin_unlock_irqrestore(&rxq->lock, flags);
3728                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3729                 if (rc)
3730                         return rc;
3731         }
3732
3733         return 0;
3734 }
3735
3736 /**
3737  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3738  *
3739  * When moving to rx_free an SKB is allocated for the slot.
3740  *
3741  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3742  * This is called as a scheduled work item (except for during initialization)
3743  */
3744 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3745 {
3746         struct iwl3945_rx_queue *rxq = &priv->rxq;
3747         struct list_head *element;
3748         struct iwl3945_rx_mem_buffer *rxb;
3749         unsigned long flags;
3750         spin_lock_irqsave(&rxq->lock, flags);
3751         while (!list_empty(&rxq->rx_used)) {
3752                 element = rxq->rx_used.next;
3753                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3754
3755                 /* Alloc a new receive buffer */
3756                 rxb->skb =
3757                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3758                 if (!rxb->skb) {
3759                         if (net_ratelimit())
3760                                 printk(KERN_CRIT DRV_NAME
3761                                        ": Can not allocate SKB buffers\n");
3762                         /* We don't reschedule replenish work here -- we will
3763                          * call the restock method and if it still needs
3764                          * more buffers it will schedule replenish */
3765                         break;
3766                 }
3767
3768                 /* If radiotap head is required, reserve some headroom here.
3769                  * The physical head count is a variable rx_stats->phy_count.
3770                  * We reserve 4 bytes here. Plus these extra bytes, the
3771                  * headroom of the physical head should be enough for the
3772                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3773                  */
3774                 skb_reserve(rxb->skb, 4);
3775
3776                 priv->alloc_rxb_skb++;
3777                 list_del(element);
3778
3779                 /* Get physical address of RB/SKB */
3780                 rxb->dma_addr =
3781                     pci_map_single(priv->pci_dev, rxb->skb->data,
3782                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3783                 list_add_tail(&rxb->list, &rxq->rx_free);
3784                 rxq->free_count++;
3785         }
3786         spin_unlock_irqrestore(&rxq->lock, flags);
3787 }
3788
3789 /*
3790  * this should be called while priv->lock is locked
3791  */
3792 static void __iwl3945_rx_replenish(void *data)
3793 {
3794         struct iwl3945_priv *priv = data;
3795
3796         iwl3945_rx_allocate(priv);
3797         iwl3945_rx_queue_restock(priv);
3798 }
3799
3800
3801 void iwl3945_rx_replenish(void *data)
3802 {
3803         struct iwl3945_priv *priv = data;
3804         unsigned long flags;
3805
3806         iwl3945_rx_allocate(priv);
3807
3808         spin_lock_irqsave(&priv->lock, flags);
3809         iwl3945_rx_queue_restock(priv);
3810         spin_unlock_irqrestore(&priv->lock, flags);
3811 }
3812
3813 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3814  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3815  * This free routine walks the list of POOL entries and if SKB is set to
3816  * non NULL it is unmapped and freed
3817  */
3818 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3819 {
3820         int i;
3821         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3822                 if (rxq->pool[i].skb != NULL) {
3823                         pci_unmap_single(priv->pci_dev,
3824                                          rxq->pool[i].dma_addr,
3825                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3826                         dev_kfree_skb(rxq->pool[i].skb);
3827                 }
3828         }
3829
3830         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3831                             rxq->dma_addr);
3832         rxq->bd = NULL;
3833 }
3834
3835 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3836 {
3837         struct iwl3945_rx_queue *rxq = &priv->rxq;
3838         struct pci_dev *dev = priv->pci_dev;
3839         int i;
3840
3841         spin_lock_init(&rxq->lock);
3842         INIT_LIST_HEAD(&rxq->rx_free);
3843         INIT_LIST_HEAD(&rxq->rx_used);
3844
3845         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3846         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3847         if (!rxq->bd)
3848                 return -ENOMEM;
3849
3850         /* Fill the rx_used queue with _all_ of the Rx buffers */
3851         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3852                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3853
3854         /* Set us so that we have processed and used all buffers, but have
3855          * not restocked the Rx queue with fresh buffers */
3856         rxq->read = rxq->write = 0;
3857         rxq->free_count = 0;
3858         rxq->need_update = 0;
3859         return 0;
3860 }
3861
3862 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3863 {
3864         unsigned long flags;
3865         int i;
3866         spin_lock_irqsave(&rxq->lock, flags);
3867         INIT_LIST_HEAD(&rxq->rx_free);
3868         INIT_LIST_HEAD(&rxq->rx_used);
3869         /* Fill the rx_used queue with _all_ of the Rx buffers */
3870         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3871                 /* In the reset function, these buffers may have been allocated
3872                  * to an SKB, so we need to unmap and free potential storage */
3873                 if (rxq->pool[i].skb != NULL) {
3874                         pci_unmap_single(priv->pci_dev,
3875                                          rxq->pool[i].dma_addr,
3876                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3877                         priv->alloc_rxb_skb--;
3878                         dev_kfree_skb(rxq->pool[i].skb);
3879                         rxq->pool[i].skb = NULL;
3880                 }
3881                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3882         }
3883
3884         /* Set us so that we have processed and used all buffers, but have
3885          * not restocked the Rx queue with fresh buffers */
3886         rxq->read = rxq->write = 0;
3887         rxq->free_count = 0;
3888         spin_unlock_irqrestore(&rxq->lock, flags);
3889 }
3890
3891 /* Convert linear signal-to-noise ratio into dB */
3892 static u8 ratio2dB[100] = {
3893 /*       0   1   2   3   4   5   6   7   8   9 */
3894          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3895         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3896         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3897         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3898         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3899         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3900         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3901         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3902         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3903         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3904 };
3905
3906 /* Calculates a relative dB value from a ratio of linear
3907  *   (i.e. not dB) signal levels.
3908  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3909 int iwl3945_calc_db_from_ratio(int sig_ratio)
3910 {
3911         /* 1000:1 or higher just report as 60 dB */
3912         if (sig_ratio >= 1000)
3913                 return 60;
3914
3915         /* 100:1 or higher, divide by 10 and use table,
3916          *   add 20 dB to make up for divide by 10 */
3917         if (sig_ratio >= 100)
3918                 return (20 + (int)ratio2dB[sig_ratio/10]);
3919
3920         /* We shouldn't see this */
3921         if (sig_ratio < 1)
3922                 return 0;
3923
3924         /* Use table for ratios 1:1 - 99:1 */
3925         return (int)ratio2dB[sig_ratio];
3926 }
3927
3928 #define PERFECT_RSSI (-20) /* dBm */
3929 #define WORST_RSSI (-95)   /* dBm */
3930 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3931
3932 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3933  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3934  *   about formulas used below. */
3935 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3936 {
3937         int sig_qual;
3938         int degradation = PERFECT_RSSI - rssi_dbm;
3939
3940         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3941          * as indicator; formula is (signal dbm - noise dbm).
3942          * SNR at or above 40 is a great signal (100%).
3943          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3944          * Weakest usable signal is usually 10 - 15 dB SNR. */
3945         if (noise_dbm) {
3946                 if (rssi_dbm - noise_dbm >= 40)
3947                         return 100;
3948                 else if (rssi_dbm < noise_dbm)
3949                         return 0;
3950                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3951
3952         /* Else use just the signal level.
3953          * This formula is a least squares fit of data points collected and
3954          *   compared with a reference system that had a percentage (%) display
3955          *   for signal quality. */
3956         } else
3957                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3958                             (15 * RSSI_RANGE + 62 * degradation)) /
3959                            (RSSI_RANGE * RSSI_RANGE);
3960
3961         if (sig_qual > 100)
3962                 sig_qual = 100;
3963         else if (sig_qual < 1)
3964                 sig_qual = 0;
3965
3966         return sig_qual;
3967 }
3968
3969 /**
3970  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3971  *
3972  * Uses the priv->rx_handlers callback function array to invoke
3973  * the appropriate handlers, including command responses,
3974  * frame-received notifications, and other notifications.
3975  */
3976 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3977 {
3978         struct iwl3945_rx_mem_buffer *rxb;
3979         struct iwl3945_rx_packet *pkt;
3980         struct iwl3945_rx_queue *rxq = &priv->rxq;
3981         u32 r, i;
3982         int reclaim;
3983         unsigned long flags;
3984         u8 fill_rx = 0;
3985         u32 count = 8;
3986
3987         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3988          * buffer that the driver may process (last buffer filled by ucode). */
3989         r = iwl3945_hw_get_rx_read(priv);
3990         i = rxq->read;
3991
3992         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3993                 fill_rx = 1;
3994         /* Rx interrupt, but nothing sent from uCode */
3995         if (i == r)
3996                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3997
3998         while (i != r) {
3999                 rxb = rxq->queue[i];
4000
4001                 /* If an RXB doesn't have a Rx queue slot associated with it,
4002                  * then a bug has been introduced in the queue refilling
4003                  * routines -- catch it here */
4004                 BUG_ON(rxb == NULL);
4005
4006                 rxq->queue[i] = NULL;
4007
4008                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4009                                             IWL_RX_BUF_SIZE,
4010                                             PCI_DMA_FROMDEVICE);
4011                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4012
4013                 /* Reclaim a command buffer only if this packet is a response
4014                  *   to a (driver-originated) command.
4015                  * If the packet (e.g. Rx frame) originated from uCode,
4016                  *   there is no command buffer to reclaim.
4017                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4018                  *   but apparently a few don't get set; catch them here. */
4019                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4020                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4021                         (pkt->hdr.cmd != REPLY_TX);
4022
4023                 /* Based on type of command response or notification,
4024                  *   handle those that need handling via function in
4025                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4026                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4027                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4028                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4029                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4030                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4031                 } else {
4032                         /* No handling needed */
4033                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4034                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4035                                 r, i, get_cmd_string(pkt->hdr.cmd),
4036                                 pkt->hdr.cmd);
4037                 }
4038
4039                 if (reclaim) {
4040                         /* Invoke any callbacks, transfer the skb to caller, and
4041                          * fire off the (possibly) blocking iwl3945_send_cmd()
4042                          * as we reclaim the driver command queue */
4043                         if (rxb && rxb->skb)
4044                                 iwl3945_tx_cmd_complete(priv, rxb);
4045                         else
4046                                 IWL_WARNING("Claim null rxb?\n");
4047                 }
4048
4049                 /* For now we just don't re-use anything.  We can tweak this
4050                  * later to try and re-use notification packets and SKBs that
4051                  * fail to Rx correctly */
4052                 if (rxb->skb != NULL) {
4053                         priv->alloc_rxb_skb--;
4054                         dev_kfree_skb_any(rxb->skb);
4055                         rxb->skb = NULL;
4056                 }
4057
4058                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4059                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4060                 spin_lock_irqsave(&rxq->lock, flags);
4061                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4062                 spin_unlock_irqrestore(&rxq->lock, flags);
4063                 i = (i + 1) & RX_QUEUE_MASK;
4064                 /* If there are a lot of unused frames,
4065                  * restock the Rx queue so ucode won't assert. */
4066                 if (fill_rx) {
4067                         count++;
4068                         if (count >= 8) {
4069                                 priv->rxq.read = i;
4070                                 __iwl3945_rx_replenish(priv);
4071                                 count = 0;
4072                         }
4073                 }
4074         }
4075
4076         /* Backtrack one entry */
4077         priv->rxq.read = i;
4078         iwl3945_rx_queue_restock(priv);
4079 }
4080
4081 /**
4082  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4083  */
4084 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4085                                   struct iwl3945_tx_queue *txq)
4086 {
4087         u32 reg = 0;
4088         int rc = 0;
4089         int txq_id = txq->q.id;
4090
4091         if (txq->need_update == 0)
4092                 return rc;
4093
4094         /* if we're trying to save power */
4095         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4096                 /* wake up nic if it's powered down ...
4097                  * uCode will wake up, and interrupt us again, so next
4098                  * time we'll skip this part. */
4099                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4100
4101                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4102                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4103                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4104                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4105                         return rc;
4106                 }
4107
4108                 /* restore this queue's parameters in nic hardware. */
4109                 rc = iwl3945_grab_nic_access(priv);
4110                 if (rc)
4111                         return rc;
4112                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4113                                      txq->q.write_ptr | (txq_id << 8));
4114                 iwl3945_release_nic_access(priv);
4115
4116         /* else not in power-save mode, uCode will never sleep when we're
4117          * trying to tx (during RFKILL, we're not trying to tx). */
4118         } else
4119                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4120                             txq->q.write_ptr | (txq_id << 8));
4121
4122         txq->need_update = 0;
4123
4124         return rc;
4125 }
4126
4127 #ifdef CONFIG_IWL3945_DEBUG
4128 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4129 {
4130         DECLARE_MAC_BUF(mac);
4131
4132         IWL_DEBUG_RADIO("RX CONFIG:\n");
4133         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4134         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4135         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4136         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4137                         le32_to_cpu(rxon->filter_flags));
4138         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4139         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4140                         rxon->ofdm_basic_rates);
4141         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4142         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4143                         print_mac(mac, rxon->node_addr));
4144         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4145                         print_mac(mac, rxon->bssid_addr));
4146         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4147 }
4148 #endif
4149
4150 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4151 {
4152         IWL_DEBUG_ISR("Enabling interrupts\n");
4153         set_bit(STATUS_INT_ENABLED, &priv->status);
4154         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4155 }
4156
4157
4158 /* call this function to flush any scheduled tasklet */
4159 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
4160 {
4161         /* wait to make sure we flush pedding tasklet*/
4162         synchronize_irq(priv->pci_dev->irq);
4163         tasklet_kill(&priv->irq_tasklet);
4164 }
4165
4166
4167 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4168 {
4169         clear_bit(STATUS_INT_ENABLED, &priv->status);
4170
4171         /* disable interrupts from uCode/NIC to host */
4172         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4173
4174         /* acknowledge/clear/reset any interrupts still pending
4175          * from uCode or flow handler (Rx/Tx DMA) */
4176         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4177         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4178         IWL_DEBUG_ISR("Disabled interrupts\n");
4179 }
4180
4181 static const char *desc_lookup(int i)
4182 {
4183         switch (i) {
4184         case 1:
4185                 return "FAIL";
4186         case 2:
4187                 return "BAD_PARAM";
4188         case 3:
4189                 return "BAD_CHECKSUM";
4190         case 4:
4191                 return "NMI_INTERRUPT";
4192         case 5:
4193                 return "SYSASSERT";
4194         case 6:
4195                 return "FATAL_ERROR";
4196         }
4197
4198         return "UNKNOWN";
4199 }
4200
4201 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4202 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4203
4204 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4205 {
4206         u32 i;
4207         u32 desc, time, count, base, data1;
4208         u32 blink1, blink2, ilink1, ilink2;
4209         int rc;
4210
4211         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4212
4213         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4214                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4215                 return;
4216         }
4217
4218         rc = iwl3945_grab_nic_access(priv);
4219         if (rc) {
4220                 IWL_WARNING("Can not read from adapter at this time.\n");
4221                 return;
4222         }
4223
4224         count = iwl3945_read_targ_mem(priv, base);
4225
4226         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4227                 IWL_ERROR("Start IWL Error Log Dump:\n");
4228                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4229         }
4230
4231         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4232                   "ilink1  nmiPC   Line\n");
4233         for (i = ERROR_START_OFFSET;
4234              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4235              i += ERROR_ELEM_SIZE) {
4236                 desc = iwl3945_read_targ_mem(priv, base + i);
4237                 time =
4238                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4239                 blink1 =
4240                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4241                 blink2 =
4242                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4243                 ilink1 =
4244                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4245                 ilink2 =
4246                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4247                 data1 =
4248                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4249
4250                 IWL_ERROR
4251                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4252                      desc_lookup(desc), desc, time, blink1, blink2,
4253                      ilink1, ilink2, data1);
4254         }
4255
4256         iwl3945_release_nic_access(priv);
4257
4258 }
4259
4260 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4261
4262 /**
4263  * iwl3945_print_event_log - Dump error event log to syslog
4264  *
4265  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4266  */
4267 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4268                                 u32 num_events, u32 mode)
4269 {
4270         u32 i;
4271         u32 base;       /* SRAM byte address of event log header */
4272         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4273         u32 ptr;        /* SRAM byte address of log data */
4274         u32 ev, time, data; /* event log data */
4275
4276         if (num_events == 0)
4277                 return;
4278
4279         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4280
4281         if (mode == 0)
4282                 event_size = 2 * sizeof(u32);
4283         else
4284                 event_size = 3 * sizeof(u32);
4285
4286         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4287
4288         /* "time" is actually "data" for mode 0 (no timestamp).
4289          * place event id # at far right for easier visual parsing. */
4290         for (i = 0; i < num_events; i++) {
4291                 ev = iwl3945_read_targ_mem(priv, ptr);
4292                 ptr += sizeof(u32);
4293                 time = iwl3945_read_targ_mem(priv, ptr);
4294                 ptr += sizeof(u32);
4295                 if (mode == 0)
4296                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4297                 else {
4298                         data = iwl3945_read_targ_mem(priv, ptr);
4299                         ptr += sizeof(u32);
4300                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4301                 }
4302         }
4303 }
4304
4305 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4306 {
4307         int rc;
4308         u32 base;       /* SRAM byte address of event log header */
4309         u32 capacity;   /* event log capacity in # entries */
4310         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4311         u32 num_wraps;  /* # times uCode wrapped to top of log */
4312         u32 next_entry; /* index of next entry to be written by uCode */
4313         u32 size;       /* # entries that we'll print */
4314
4315         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4316         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4317                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4318                 return;
4319         }
4320
4321         rc = iwl3945_grab_nic_access(priv);
4322         if (rc) {
4323                 IWL_WARNING("Can not read from adapter at this time.\n");
4324                 return;
4325         }
4326
4327         /* event log header */
4328         capacity = iwl3945_read_targ_mem(priv, base);
4329         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4330         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4331         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4332
4333         size = num_wraps ? capacity : next_entry;
4334
4335         /* bail out if nothing in log */
4336         if (size == 0) {
4337                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4338                 iwl3945_release_nic_access(priv);
4339                 return;
4340         }
4341
4342         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4343                   size, num_wraps);
4344
4345         /* if uCode has wrapped back to top of log, start at the oldest entry,
4346          * i.e the next one that uCode would fill. */
4347         if (num_wraps)
4348                 iwl3945_print_event_log(priv, next_entry,
4349                                     capacity - next_entry, mode);
4350
4351         /* (then/else) start at top of log */
4352         iwl3945_print_event_log(priv, 0, next_entry, mode);
4353
4354         iwl3945_release_nic_access(priv);
4355 }
4356
4357 /**
4358  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4359  */
4360 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4361 {
4362         /* Set the FW error flag -- cleared on iwl3945_down */
4363         set_bit(STATUS_FW_ERROR, &priv->status);
4364
4365         /* Cancel currently queued command. */
4366         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4367
4368 #ifdef CONFIG_IWL3945_DEBUG
4369         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4370                 iwl3945_dump_nic_error_log(priv);
4371                 iwl3945_dump_nic_event_log(priv);
4372                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4373         }
4374 #endif
4375
4376         wake_up_interruptible(&priv->wait_command_queue);
4377
4378         /* Keep the restart process from trying to send host
4379          * commands by clearing the INIT status bit */
4380         clear_bit(STATUS_READY, &priv->status);
4381
4382         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4383                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4384                           "Restarting adapter due to uCode error.\n");
4385
4386                 if (iwl3945_is_associated(priv)) {
4387                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4388                                sizeof(priv->recovery_rxon));
4389                         priv->error_recovering = 1;
4390                 }
4391                 queue_work(priv->workqueue, &priv->restart);
4392         }
4393 }
4394
4395 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4396 {
4397         unsigned long flags;
4398
4399         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4400                sizeof(priv->staging_rxon));
4401         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4402         iwl3945_commit_rxon(priv);
4403
4404         iwl3945_add_station(priv, priv->bssid, 1, 0);
4405
4406         spin_lock_irqsave(&priv->lock, flags);
4407         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4408         priv->error_recovering = 0;
4409         spin_unlock_irqrestore(&priv->lock, flags);
4410 }
4411
4412 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4413 {
4414         u32 inta, handled = 0;
4415         u32 inta_fh;
4416         unsigned long flags;
4417 #ifdef CONFIG_IWL3945_DEBUG
4418         u32 inta_mask;
4419 #endif
4420
4421         spin_lock_irqsave(&priv->lock, flags);
4422
4423         /* Ack/clear/reset pending uCode interrupts.
4424          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4425          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4426         inta = iwl3945_read32(priv, CSR_INT);
4427         iwl3945_write32(priv, CSR_INT, inta);
4428
4429         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4430          * Any new interrupts that happen after this, either while we're
4431          * in this tasklet, or later, will show up in next ISR/tasklet. */
4432         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4433         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4434
4435 #ifdef CONFIG_IWL3945_DEBUG
4436         if (iwl3945_debug_level & IWL_DL_ISR) {
4437                 /* just for debug */
4438                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4439                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4440                               inta, inta_mask, inta_fh);
4441         }
4442 #endif
4443
4444         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4445          * atomic, make sure that inta covers all the interrupts that
4446          * we've discovered, even if FH interrupt came in just after
4447          * reading CSR_INT. */
4448         if (inta_fh & CSR39_FH_INT_RX_MASK)
4449                 inta |= CSR_INT_BIT_FH_RX;
4450         if (inta_fh & CSR39_FH_INT_TX_MASK)
4451                 inta |= CSR_INT_BIT_FH_TX;
4452
4453         /* Now service all interrupt bits discovered above. */
4454         if (inta & CSR_INT_BIT_HW_ERR) {
4455                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4456
4457                 /* Tell the device to stop sending interrupts */
4458                 iwl3945_disable_interrupts(priv);
4459
4460                 iwl3945_irq_handle_error(priv);
4461
4462                 handled |= CSR_INT_BIT_HW_ERR;
4463
4464                 spin_unlock_irqrestore(&priv->lock, flags);
4465
4466                 return;
4467         }
4468
4469 #ifdef CONFIG_IWL3945_DEBUG
4470         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4471                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4472                 if (inta & CSR_INT_BIT_SCD)
4473                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4474                                       "the frame/frames.\n");
4475
4476                 /* Alive notification via Rx interrupt will do the real work */
4477                 if (inta & CSR_INT_BIT_ALIVE)
4478                         IWL_DEBUG_ISR("Alive interrupt\n");
4479         }
4480 #endif
4481         /* Safely ignore these bits for debug checks below */
4482         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4483
4484         /* HW RF KILL switch toggled (4965 only) */
4485         if (inta & CSR_INT_BIT_RF_KILL) {
4486                 int hw_rf_kill = 0;
4487                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4488                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4489                         hw_rf_kill = 1;
4490
4491                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4492                                 "RF_KILL bit toggled to %s.\n",
4493                                 hw_rf_kill ? "disable radio":"enable radio");
4494
4495                 /* Queue restart only if RF_KILL switch was set to "kill"
4496                  *   when we loaded driver, and is now set to "enable".
4497                  * After we're Alive, RF_KILL gets handled by
4498                  *   iwl3945_rx_card_state_notif() */
4499                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4500                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4501                         queue_work(priv->workqueue, &priv->restart);
4502                 }
4503
4504                 handled |= CSR_INT_BIT_RF_KILL;
4505         }
4506
4507         /* Chip got too hot and stopped itself (4965 only) */
4508         if (inta & CSR_INT_BIT_CT_KILL) {
4509                 IWL_ERROR("Microcode CT kill error detected.\n");
4510                 handled |= CSR_INT_BIT_CT_KILL;
4511         }
4512
4513         /* Error detected by uCode */
4514         if (inta & CSR_INT_BIT_SW_ERR) {
4515                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4516                           inta);
4517                 iwl3945_irq_handle_error(priv);
4518                 handled |= CSR_INT_BIT_SW_ERR;
4519         }
4520
4521         /* uCode wakes up after power-down sleep */
4522         if (inta & CSR_INT_BIT_WAKEUP) {
4523                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4524                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4525                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4526                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4527                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4528                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4529                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4530                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4531
4532                 handled |= CSR_INT_BIT_WAKEUP;
4533         }
4534
4535         /* All uCode command responses, including Tx command responses,
4536          * Rx "responses" (frame-received notification), and other
4537          * notifications from uCode come through here*/
4538         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4539                 iwl3945_rx_handle(priv);
4540                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4541         }
4542
4543         if (inta & CSR_INT_BIT_FH_TX) {
4544                 IWL_DEBUG_ISR("Tx interrupt\n");
4545
4546                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4547                 if (!iwl3945_grab_nic_access(priv)) {
4548                         iwl3945_write_direct32(priv,
4549                                              FH_TCSR_CREDIT
4550                                              (ALM_FH_SRVC_CHNL), 0x0);
4551                         iwl3945_release_nic_access(priv);
4552                 }
4553                 handled |= CSR_INT_BIT_FH_TX;
4554         }
4555
4556         if (inta & ~handled)
4557                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4558
4559         if (inta & ~CSR_INI_SET_MASK) {
4560                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4561                          inta & ~CSR_INI_SET_MASK);
4562                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4563         }
4564
4565         /* Re-enable all interrupts */
4566         /* only Re-enable if disabled by irq */
4567         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4568                 iwl3945_enable_interrupts(priv);
4569
4570 #ifdef CONFIG_IWL3945_DEBUG
4571         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4572                 inta = iwl3945_read32(priv, CSR_INT);
4573                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4574                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4575                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4576                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4577         }
4578 #endif
4579         spin_unlock_irqrestore(&priv->lock, flags);
4580 }
4581
4582 static irqreturn_t iwl3945_isr(int irq, void *data)
4583 {
4584         struct iwl3945_priv *priv = data;
4585         u32 inta, inta_mask;
4586         u32 inta_fh;
4587         if (!priv)
4588                 return IRQ_NONE;
4589
4590         spin_lock(&priv->lock);
4591
4592         /* Disable (but don't clear!) interrupts here to avoid
4593          *    back-to-back ISRs and sporadic interrupts from our NIC.
4594          * If we have something to service, the tasklet will re-enable ints.
4595          * If we *don't* have something, we'll re-enable before leaving here. */
4596         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4597         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4598
4599         /* Discover which interrupts are active/pending */
4600         inta = iwl3945_read32(priv, CSR_INT);
4601         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4602
4603         /* Ignore interrupt if there's nothing in NIC to service.
4604          * This may be due to IRQ shared with another device,
4605          * or due to sporadic interrupts thrown from our NIC. */
4606         if (!inta && !inta_fh) {
4607                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4608                 goto none;
4609         }
4610
4611         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4612                 /* Hardware disappeared */
4613                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4614                 goto unplugged;
4615         }
4616
4617         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4618                       inta, inta_mask, inta_fh);
4619
4620         inta &= ~CSR_INT_BIT_SCD;
4621
4622         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4623         if (likely(inta || inta_fh))
4624                 tasklet_schedule(&priv->irq_tasklet);
4625 unplugged:
4626         spin_unlock(&priv->lock);
4627
4628         return IRQ_HANDLED;
4629
4630  none:
4631         /* re-enable interrupts here since we don't have anything to service. */
4632         /* only Re-enable if disabled by irq */
4633         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4634                 iwl3945_enable_interrupts(priv);
4635         spin_unlock(&priv->lock);
4636         return IRQ_NONE;
4637 }
4638
4639 /************************** EEPROM BANDS ****************************
4640  *
4641  * The iwl3945_eeprom_band definitions below provide the mapping from the
4642  * EEPROM contents to the specific channel number supported for each
4643  * band.
4644  *
4645  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4646  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4647  * The specific geography and calibration information for that channel
4648  * is contained in the eeprom map itself.
4649  *
4650  * During init, we copy the eeprom information and channel map
4651  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4652  *
4653  * channel_map_24/52 provides the index in the channel_info array for a
4654  * given channel.  We have to have two separate maps as there is channel
4655  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4656  * band_2
4657  *
4658  * A value of 0xff stored in the channel_map indicates that the channel
4659  * is not supported by the hardware at all.
4660  *
4661  * A value of 0xfe in the channel_map indicates that the channel is not
4662  * valid for Tx with the current hardware.  This means that
4663  * while the system can tune and receive on a given channel, it may not
4664  * be able to associate or transmit any frames on that
4665  * channel.  There is no corresponding channel information for that
4666  * entry.
4667  *
4668  *********************************************************************/
4669
4670 /* 2.4 GHz */
4671 static const u8 iwl3945_eeprom_band_1[14] = {
4672         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4673 };
4674
4675 /* 5.2 GHz bands */
4676 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4677         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4678 };
4679
4680 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4681         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4682 };
4683
4684 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4685         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4686 };
4687
4688 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4689         145, 149, 153, 157, 161, 165
4690 };
4691
4692 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4693                                     int *eeprom_ch_count,
4694                                     const struct iwl3945_eeprom_channel
4695                                     **eeprom_ch_info,
4696                                     const u8 **eeprom_ch_index)
4697 {
4698         switch (band) {
4699         case 1:         /* 2.4GHz band */
4700                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4701                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4702                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4703                 break;
4704         case 2:         /* 4.9GHz band */
4705                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4706                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4707                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4708                 break;
4709         case 3:         /* 5.2GHz band */
4710                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4711                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4712                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4713                 break;
4714         case 4:         /* 5.5GHz band */
4715                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4716                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4717                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4718                 break;
4719         case 5:         /* 5.7GHz band */
4720                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4721                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4722                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4723                 break;
4724         default:
4725                 BUG();
4726                 return;
4727         }
4728 }
4729
4730 /**
4731  * iwl3945_get_channel_info - Find driver's private channel info
4732  *
4733  * Based on band and channel number.
4734  */
4735 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4736                                                     enum ieee80211_band band, u16 channel)
4737 {
4738         int i;
4739
4740         switch (band) {
4741         case IEEE80211_BAND_5GHZ:
4742                 for (i = 14; i < priv->channel_count; i++) {
4743                         if (priv->channel_info[i].channel == channel)
4744                                 return &priv->channel_info[i];
4745                 }
4746                 break;
4747
4748         case IEEE80211_BAND_2GHZ:
4749                 if (channel >= 1 && channel <= 14)
4750                         return &priv->channel_info[channel - 1];
4751                 break;
4752         case IEEE80211_NUM_BANDS:
4753                 WARN_ON(1);
4754         }
4755
4756         return NULL;
4757 }
4758
4759 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4760                             ? # x " " : "")
4761
4762 /**
4763  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4764  */
4765 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4766 {
4767         int eeprom_ch_count = 0;
4768         const u8 *eeprom_ch_index = NULL;
4769         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4770         int band, ch;
4771         struct iwl3945_channel_info *ch_info;
4772
4773         if (priv->channel_count) {
4774                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4775                 return 0;
4776         }
4777
4778         if (priv->eeprom.version < 0x2f) {
4779                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4780                             priv->eeprom.version);
4781                 return -EINVAL;
4782         }
4783
4784         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4785
4786         priv->channel_count =
4787             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4788             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4789             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4790             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4791             ARRAY_SIZE(iwl3945_eeprom_band_5);
4792
4793         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4794
4795         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4796                                      priv->channel_count, GFP_KERNEL);
4797         if (!priv->channel_info) {
4798                 IWL_ERROR("Could not allocate channel_info\n");
4799                 priv->channel_count = 0;
4800                 return -ENOMEM;
4801         }
4802
4803         ch_info = priv->channel_info;
4804
4805         /* Loop through the 5 EEPROM bands adding them in order to the
4806          * channel map we maintain (that contains additional information than
4807          * what just in the EEPROM) */
4808         for (band = 1; band <= 5; band++) {
4809
4810                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4811                                         &eeprom_ch_info, &eeprom_ch_index);
4812
4813                 /* Loop through each band adding each of the channels */
4814                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4815                         ch_info->channel = eeprom_ch_index[ch];
4816                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4817                             IEEE80211_BAND_5GHZ;
4818
4819                         /* permanently store EEPROM's channel regulatory flags
4820                          *   and max power in channel info database. */
4821                         ch_info->eeprom = eeprom_ch_info[ch];
4822
4823                         /* Copy the run-time flags so they are there even on
4824                          * invalid channels */
4825                         ch_info->flags = eeprom_ch_info[ch].flags;
4826
4827                         if (!(is_channel_valid(ch_info))) {
4828                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4829                                                "No traffic\n",
4830                                                ch_info->channel,
4831                                                ch_info->flags,
4832                                                is_channel_a_band(ch_info) ?
4833                                                "5.2" : "2.4");
4834                                 ch_info++;
4835                                 continue;
4836                         }
4837
4838                         /* Initialize regulatory-based run-time data */
4839                         ch_info->max_power_avg = ch_info->curr_txpow =
4840                             eeprom_ch_info[ch].max_power_avg;
4841                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4842                         ch_info->min_power = 0;
4843
4844                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
4845                                        " %ddBm): Ad-Hoc %ssupported\n",
4846                                        ch_info->channel,
4847                                        is_channel_a_band(ch_info) ?
4848                                        "5.2" : "2.4",
4849                                        CHECK_AND_PRINT(VALID),
4850                                        CHECK_AND_PRINT(IBSS),
4851                                        CHECK_AND_PRINT(ACTIVE),
4852                                        CHECK_AND_PRINT(RADAR),
4853                                        CHECK_AND_PRINT(WIDE),
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                 scan_ch->channel = channels[i].hw_value;
4972
4973                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4974                 if (!is_channel_valid(ch_info)) {
4975                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4976                                        scan_ch->channel);
4977                         continue;
4978                 }
4979
4980                 if (!is_active || is_channel_passive(ch_info) ||
4981                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4982                         scan_ch->type = 0;      /* passive */
4983                 else
4984                         scan_ch->type = 1;      /* active */
4985
4986                 if (scan_ch->type & 1)
4987                         scan_ch->type |= (direct_mask << 1);
4988
4989                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4990                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4991
4992                 /* Set txpower levels to defaults */
4993                 scan_ch->tpc.dsp_atten = 110;
4994                 /* scan_pwr_info->tpc.dsp_atten; */
4995
4996                 /*scan_pwr_info->tpc.tx_gain; */
4997                 if (band == IEEE80211_BAND_5GHZ)
4998                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4999                 else {
5000                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5001                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5002                          * power level:
5003                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5004                          */
5005                 }
5006
5007                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5008                                scan_ch->channel,
5009                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5010                                (scan_ch->type & 1) ?
5011                                active_dwell : passive_dwell);
5012
5013                 scan_ch++;
5014                 added++;
5015         }
5016
5017         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5018         return added;
5019 }
5020
5021 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5022                               struct ieee80211_rate *rates)
5023 {
5024         int i;
5025
5026         for (i = 0; i < IWL_RATE_COUNT; i++) {
5027                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
5028                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5029                 rates[i].hw_value_short = i;
5030                 rates[i].flags = 0;
5031                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5032                         /*
5033                          * If CCK != 1M then set short preamble rate flag.
5034                          */
5035                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5036                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5037                 }
5038         }
5039 }
5040
5041 /**
5042  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5043  */
5044 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5045 {
5046         struct iwl3945_channel_info *ch;
5047         struct ieee80211_supported_band *sband;
5048         struct ieee80211_channel *channels;
5049         struct ieee80211_channel *geo_ch;
5050         struct ieee80211_rate *rates;
5051         int i = 0;
5052
5053         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5054             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5055                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5056                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5057                 return 0;
5058         }
5059
5060         channels = kzalloc(sizeof(struct ieee80211_channel) *
5061                            priv->channel_count, GFP_KERNEL);
5062         if (!channels)
5063                 return -ENOMEM;
5064
5065         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5066                         GFP_KERNEL);
5067         if (!rates) {
5068                 kfree(channels);
5069                 return -ENOMEM;
5070         }
5071
5072         /* 5.2GHz channels start after the 2.4GHz channels */
5073         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5074         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5075         /* just OFDM */
5076         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5077         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5078
5079         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5080         sband->channels = channels;
5081         /* OFDM & CCK */
5082         sband->bitrates = rates;
5083         sband->n_bitrates = IWL_RATE_COUNT;
5084
5085         priv->ieee_channels = channels;
5086         priv->ieee_rates = rates;
5087
5088         iwl3945_init_hw_rates(priv, rates);
5089
5090         for (i = 0;  i < priv->channel_count; i++) {
5091                 ch = &priv->channel_info[i];
5092
5093                 /* FIXME: might be removed if scan is OK*/
5094                 if (!is_channel_valid(ch))
5095                         continue;
5096
5097                 if (is_channel_a_band(ch))
5098                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5099                 else
5100                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5101
5102                 geo_ch = &sband->channels[sband->n_channels++];
5103
5104                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5105                 geo_ch->max_power = ch->max_power_avg;
5106                 geo_ch->max_antenna_gain = 0xff;
5107                 geo_ch->hw_value = ch->channel;
5108
5109                 if (is_channel_valid(ch)) {
5110                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5111                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5112
5113                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5114                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5115
5116                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5117                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5118
5119                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5120                                 priv->max_channel_txpower_limit =
5121                                     ch->max_power_avg;
5122                 } else {
5123                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5124                 }
5125
5126                 /* Save flags for reg domain usage */
5127                 geo_ch->orig_flags = geo_ch->flags;
5128
5129                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5130                                 ch->channel, geo_ch->center_freq,
5131                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5132                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5133                                 "restricted" : "valid",
5134                                  geo_ch->flags);
5135         }
5136
5137         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5138              priv->cfg->sku & IWL_SKU_A) {
5139                 printk(KERN_INFO DRV_NAME
5140                        ": Incorrectly detected BG card as ABG.  Please send "
5141                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5142                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5143                  priv->cfg->sku &= ~IWL_SKU_A;
5144         }
5145
5146         printk(KERN_INFO DRV_NAME
5147                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5148                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5149                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5150
5151         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5152                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5153                         &priv->bands[IEEE80211_BAND_2GHZ];
5154         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5155                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5156                         &priv->bands[IEEE80211_BAND_5GHZ];
5157
5158         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5159
5160         return 0;
5161 }
5162
5163 /*
5164  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5165  */
5166 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5167 {
5168         kfree(priv->ieee_channels);
5169         kfree(priv->ieee_rates);
5170         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5171 }
5172
5173 /******************************************************************************
5174  *
5175  * uCode download functions
5176  *
5177  ******************************************************************************/
5178
5179 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5180 {
5181         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5182         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5183         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5184         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5185         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5186         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5187 }
5188
5189 /**
5190  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5191  *     looking at all data.
5192  */
5193 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5194 {
5195         u32 val;
5196         u32 save_len = len;
5197         int rc = 0;
5198         u32 errcnt;
5199
5200         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5201
5202         rc = iwl3945_grab_nic_access(priv);
5203         if (rc)
5204                 return rc;
5205
5206         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5207
5208         errcnt = 0;
5209         for (; len > 0; len -= sizeof(u32), image++) {
5210                 /* read data comes through single port, auto-incr addr */
5211                 /* NOTE: Use the debugless read so we don't flood kernel log
5212                  * if IWL_DL_IO is set */
5213                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5214                 if (val != le32_to_cpu(*image)) {
5215                         IWL_ERROR("uCode INST section is invalid at "
5216                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5217                                   save_len - len, val, le32_to_cpu(*image));
5218                         rc = -EIO;
5219                         errcnt++;
5220                         if (errcnt >= 20)
5221                                 break;
5222                 }
5223         }
5224
5225         iwl3945_release_nic_access(priv);
5226
5227         if (!errcnt)
5228                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5229
5230         return rc;
5231 }
5232
5233
5234 /**
5235  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5236  *   using sample data 100 bytes apart.  If these sample points are good,
5237  *   it's a pretty good bet that everything between them is good, too.
5238  */
5239 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5240 {
5241         u32 val;
5242         int rc = 0;
5243         u32 errcnt = 0;
5244         u32 i;
5245
5246         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5247
5248         rc = iwl3945_grab_nic_access(priv);
5249         if (rc)
5250                 return rc;
5251
5252         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5253                 /* read data comes through single port, auto-incr addr */
5254                 /* NOTE: Use the debugless read so we don't flood kernel log
5255                  * if IWL_DL_IO is set */
5256                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5257                         i + RTC_INST_LOWER_BOUND);
5258                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5259                 if (val != le32_to_cpu(*image)) {
5260 #if 0 /* Enable this if you want to see details */
5261                         IWL_ERROR("uCode INST section is invalid at "
5262                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5263                                   i, val, *image);
5264 #endif
5265                         rc = -EIO;
5266                         errcnt++;
5267                         if (errcnt >= 3)
5268                                 break;
5269                 }
5270         }
5271
5272         iwl3945_release_nic_access(priv);
5273
5274         return rc;
5275 }
5276
5277
5278 /**
5279  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5280  *    and verify its contents
5281  */
5282 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5283 {
5284         __le32 *image;
5285         u32 len;
5286         int rc = 0;
5287
5288         /* Try bootstrap */
5289         image = (__le32 *)priv->ucode_boot.v_addr;
5290         len = priv->ucode_boot.len;
5291         rc = iwl3945_verify_inst_sparse(priv, image, len);
5292         if (rc == 0) {
5293                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5294                 return 0;
5295         }
5296
5297         /* Try initialize */
5298         image = (__le32 *)priv->ucode_init.v_addr;
5299         len = priv->ucode_init.len;
5300         rc = iwl3945_verify_inst_sparse(priv, image, len);
5301         if (rc == 0) {
5302                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5303                 return 0;
5304         }
5305
5306         /* Try runtime/protocol */
5307         image = (__le32 *)priv->ucode_code.v_addr;
5308         len = priv->ucode_code.len;
5309         rc = iwl3945_verify_inst_sparse(priv, image, len);
5310         if (rc == 0) {
5311                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5312                 return 0;
5313         }
5314
5315         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5316
5317         /* Since nothing seems to match, show first several data entries in
5318          * instruction SRAM, so maybe visual inspection will give a clue.
5319          * Selection of bootstrap image (vs. other images) is arbitrary. */
5320         image = (__le32 *)priv->ucode_boot.v_addr;
5321         len = priv->ucode_boot.len;
5322         rc = iwl3945_verify_inst_full(priv, image, len);
5323
5324         return rc;
5325 }
5326
5327
5328 /* check contents of special bootstrap uCode SRAM */
5329 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5330 {
5331         __le32 *image = priv->ucode_boot.v_addr;
5332         u32 len = priv->ucode_boot.len;
5333         u32 reg;
5334         u32 val;
5335
5336         IWL_DEBUG_INFO("Begin verify bsm\n");
5337
5338         /* verify BSM SRAM contents */
5339         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5340         for (reg = BSM_SRAM_LOWER_BOUND;
5341              reg < BSM_SRAM_LOWER_BOUND + len;
5342              reg += sizeof(u32), image ++) {
5343                 val = iwl3945_read_prph(priv, reg);
5344                 if (val != le32_to_cpu(*image)) {
5345                         IWL_ERROR("BSM uCode verification failed at "
5346                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5347                                   BSM_SRAM_LOWER_BOUND,
5348                                   reg - BSM_SRAM_LOWER_BOUND, len,
5349                                   val, le32_to_cpu(*image));
5350                         return -EIO;
5351                 }
5352         }
5353
5354         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5355
5356         return 0;
5357 }
5358
5359 /**
5360  * iwl3945_load_bsm - Load bootstrap instructions
5361  *
5362  * BSM operation:
5363  *
5364  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5365  * in special SRAM that does not power down during RFKILL.  When powering back
5366  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5367  * the bootstrap program into the on-board processor, and starts it.
5368  *
5369  * The bootstrap program loads (via DMA) instructions and data for a new
5370  * program from host DRAM locations indicated by the host driver in the
5371  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5372  * automatically.
5373  *
5374  * When initializing the NIC, the host driver points the BSM to the
5375  * "initialize" uCode image.  This uCode sets up some internal data, then
5376  * notifies host via "initialize alive" that it is complete.
5377  *
5378  * The host then replaces the BSM_DRAM_* pointer values to point to the
5379  * normal runtime uCode instructions and a backup uCode data cache buffer
5380  * (filled initially with starting data values for the on-board processor),
5381  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5382  * which begins normal operation.
5383  *
5384  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5385  * the backup data cache in DRAM before SRAM is powered down.
5386  *
5387  * When powering back up, the BSM loads the bootstrap program.  This reloads
5388  * the runtime uCode instructions and the backup data cache into SRAM,
5389  * and re-launches the runtime uCode from where it left off.
5390  */
5391 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5392 {
5393         __le32 *image = priv->ucode_boot.v_addr;
5394         u32 len = priv->ucode_boot.len;
5395         dma_addr_t pinst;
5396         dma_addr_t pdata;
5397         u32 inst_len;
5398         u32 data_len;
5399         int rc;
5400         int i;
5401         u32 done;
5402         u32 reg_offset;
5403
5404         IWL_DEBUG_INFO("Begin load bsm\n");
5405
5406         /* make sure bootstrap program is no larger than BSM's SRAM size */
5407         if (len > IWL_MAX_BSM_SIZE)
5408                 return -EINVAL;
5409
5410         /* Tell bootstrap uCode where to find the "Initialize" uCode
5411          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5412          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5413          *        after the "initialize" uCode has run, to point to
5414          *        runtime/protocol instructions and backup data cache. */
5415         pinst = priv->ucode_init.p_addr;
5416         pdata = priv->ucode_init_data.p_addr;
5417         inst_len = priv->ucode_init.len;
5418         data_len = priv->ucode_init_data.len;
5419
5420         rc = iwl3945_grab_nic_access(priv);
5421         if (rc)
5422                 return rc;
5423
5424         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5425         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5426         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5427         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5428
5429         /* Fill BSM memory with bootstrap instructions */
5430         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5431              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5432              reg_offset += sizeof(u32), image++)
5433                 _iwl3945_write_prph(priv, reg_offset,
5434                                           le32_to_cpu(*image));
5435
5436         rc = iwl3945_verify_bsm(priv);
5437         if (rc) {
5438                 iwl3945_release_nic_access(priv);
5439                 return rc;
5440         }
5441
5442         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5443         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5444         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5445                                  RTC_INST_LOWER_BOUND);
5446         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5447
5448         /* Load bootstrap code into instruction SRAM now,
5449          *   to prepare to load "initialize" uCode */
5450         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5451                 BSM_WR_CTRL_REG_BIT_START);
5452
5453         /* Wait for load of bootstrap uCode to finish */
5454         for (i = 0; i < 100; i++) {
5455                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5456                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5457                         break;
5458                 udelay(10);
5459         }
5460         if (i < 100)
5461                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5462         else {
5463                 IWL_ERROR("BSM write did not complete!\n");
5464                 return -EIO;
5465         }
5466
5467         /* Enable future boot loads whenever power management unit triggers it
5468          *   (e.g. when powering back up after power-save shutdown) */
5469         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5470                 BSM_WR_CTRL_REG_BIT_START_EN);
5471
5472         iwl3945_release_nic_access(priv);
5473
5474         return 0;
5475 }
5476
5477 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5478 {
5479         /* Remove all resets to allow NIC to operate */
5480         iwl3945_write32(priv, CSR_RESET, 0);
5481 }
5482
5483 /**
5484  * iwl3945_read_ucode - Read uCode images from disk file.
5485  *
5486  * Copy into buffers for card to fetch via bus-mastering
5487  */
5488 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5489 {
5490         struct iwl3945_ucode *ucode;
5491         int ret = 0;
5492         const struct firmware *ucode_raw;
5493         /* firmware file name contains uCode/driver compatibility version */
5494         const char *name = priv->cfg->fw_name;
5495         u8 *src;
5496         size_t len;
5497         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5498
5499         /* Ask kernel firmware_class module to get the boot firmware off disk.
5500          * request_firmware() is synchronous, file is in memory on return. */
5501         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5502         if (ret < 0) {
5503                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5504                                 name, ret);
5505                 goto error;
5506         }
5507
5508         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5509                        name, ucode_raw->size);
5510
5511         /* Make sure that we got at least our header! */
5512         if (ucode_raw->size < sizeof(*ucode)) {
5513                 IWL_ERROR("File size way too small!\n");
5514                 ret = -EINVAL;
5515                 goto err_release;
5516         }
5517
5518         /* Data from ucode file:  header followed by uCode images */
5519         ucode = (void *)ucode_raw->data;
5520
5521         ver = le32_to_cpu(ucode->ver);
5522         inst_size = le32_to_cpu(ucode->inst_size);
5523         data_size = le32_to_cpu(ucode->data_size);
5524         init_size = le32_to_cpu(ucode->init_size);
5525         init_data_size = le32_to_cpu(ucode->init_data_size);
5526         boot_size = le32_to_cpu(ucode->boot_size);
5527
5528         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5529         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5530         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5531         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5532         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5533         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5534
5535         /* Verify size of file vs. image size info in file's header */
5536         if (ucode_raw->size < sizeof(*ucode) +
5537                 inst_size + data_size + init_size +
5538                 init_data_size + boot_size) {
5539
5540                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5541                                (int)ucode_raw->size);
5542                 ret = -EINVAL;
5543                 goto err_release;
5544         }
5545
5546         /* Verify that uCode images will fit in card's SRAM */
5547         if (inst_size > IWL_MAX_INST_SIZE) {
5548                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5549                                inst_size);
5550                 ret = -EINVAL;
5551                 goto err_release;
5552         }
5553
5554         if (data_size > IWL_MAX_DATA_SIZE) {
5555                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5556                                data_size);
5557                 ret = -EINVAL;
5558                 goto err_release;
5559         }
5560         if (init_size > IWL_MAX_INST_SIZE) {
5561                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5562                                 init_size);
5563                 ret = -EINVAL;
5564                 goto err_release;
5565         }
5566         if (init_data_size > IWL_MAX_DATA_SIZE) {
5567                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5568                                 init_data_size);
5569                 ret = -EINVAL;
5570                 goto err_release;
5571         }
5572         if (boot_size > IWL_MAX_BSM_SIZE) {
5573                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5574                                 boot_size);
5575                 ret = -EINVAL;
5576                 goto err_release;
5577         }
5578
5579         /* Allocate ucode buffers for card's bus-master loading ... */
5580
5581         /* Runtime instructions and 2 copies of data:
5582          * 1) unmodified from disk
5583          * 2) backup cache for save/restore during power-downs */
5584         priv->ucode_code.len = inst_size;
5585         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5586
5587         priv->ucode_data.len = data_size;
5588         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5589
5590         priv->ucode_data_backup.len = data_size;
5591         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5592
5593         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5594             !priv->ucode_data_backup.v_addr)
5595                 goto err_pci_alloc;
5596
5597         /* Initialization instructions and data */
5598         if (init_size && init_data_size) {
5599                 priv->ucode_init.len = init_size;
5600                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5601
5602                 priv->ucode_init_data.len = init_data_size;
5603                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5604
5605                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5606                         goto err_pci_alloc;
5607         }
5608
5609         /* Bootstrap (instructions only, no data) */
5610         if (boot_size) {
5611                 priv->ucode_boot.len = boot_size;
5612                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5613
5614                 if (!priv->ucode_boot.v_addr)
5615                         goto err_pci_alloc;
5616         }
5617
5618         /* Copy images into buffers for card's bus-master reads ... */
5619
5620         /* Runtime instructions (first block of data in file) */
5621         src = &ucode->data[0];
5622         len = priv->ucode_code.len;
5623         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5624         memcpy(priv->ucode_code.v_addr, src, len);
5625         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5626                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5627
5628         /* Runtime data (2nd block)
5629          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5630         src = &ucode->data[inst_size];
5631         len = priv->ucode_data.len;
5632         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5633         memcpy(priv->ucode_data.v_addr, src, len);
5634         memcpy(priv->ucode_data_backup.v_addr, src, len);
5635
5636         /* Initialization instructions (3rd block) */
5637         if (init_size) {
5638                 src = &ucode->data[inst_size + data_size];
5639                 len = priv->ucode_init.len;
5640                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5641                                len);
5642                 memcpy(priv->ucode_init.v_addr, src, len);
5643         }
5644
5645         /* Initialization data (4th block) */
5646         if (init_data_size) {
5647                 src = &ucode->data[inst_size + data_size + init_size];
5648                 len = priv->ucode_init_data.len;
5649                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5650                                (int)len);
5651                 memcpy(priv->ucode_init_data.v_addr, src, len);
5652         }
5653
5654         /* Bootstrap instructions (5th block) */
5655         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5656         len = priv->ucode_boot.len;
5657         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5658                        (int)len);
5659         memcpy(priv->ucode_boot.v_addr, src, len);
5660
5661         /* We have our copies now, allow OS release its copies */
5662         release_firmware(ucode_raw);
5663         return 0;
5664
5665  err_pci_alloc:
5666         IWL_ERROR("failed to allocate pci memory\n");
5667         ret = -ENOMEM;
5668         iwl3945_dealloc_ucode_pci(priv);
5669
5670  err_release:
5671         release_firmware(ucode_raw);
5672
5673  error:
5674         return ret;
5675 }
5676
5677
5678 /**
5679  * iwl3945_set_ucode_ptrs - Set uCode address location
5680  *
5681  * Tell initialization uCode where to find runtime uCode.
5682  *
5683  * BSM registers initially contain pointers to initialization uCode.
5684  * We need to replace them to load runtime uCode inst and data,
5685  * and to save runtime data when powering down.
5686  */
5687 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5688 {
5689         dma_addr_t pinst;
5690         dma_addr_t pdata;
5691         int rc = 0;
5692         unsigned long flags;
5693
5694         /* bits 31:0 for 3945 */
5695         pinst = priv->ucode_code.p_addr;
5696         pdata = priv->ucode_data_backup.p_addr;
5697
5698         spin_lock_irqsave(&priv->lock, flags);
5699         rc = iwl3945_grab_nic_access(priv);
5700         if (rc) {
5701                 spin_unlock_irqrestore(&priv->lock, flags);
5702                 return rc;
5703         }
5704
5705         /* Tell bootstrap uCode where to find image to load */
5706         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5707         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5708         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5709                                  priv->ucode_data.len);
5710
5711         /* Inst bytecount must be last to set up, bit 31 signals uCode
5712          *   that all new ptr/size info is in place */
5713         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5714                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5715
5716         iwl3945_release_nic_access(priv);
5717
5718         spin_unlock_irqrestore(&priv->lock, flags);
5719
5720         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5721
5722         return rc;
5723 }
5724
5725 /**
5726  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5727  *
5728  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5729  *
5730  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5731  */
5732 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5733 {
5734         /* Check alive response for "valid" sign from uCode */
5735         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5736                 /* We had an error bringing up the hardware, so take it
5737                  * all the way back down so we can try again */
5738                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5739                 goto restart;
5740         }
5741
5742         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5743          * This is a paranoid check, because we would not have gotten the
5744          * "initialize" alive if code weren't properly loaded.  */
5745         if (iwl3945_verify_ucode(priv)) {
5746                 /* Runtime instruction load was bad;
5747                  * take it all the way back down so we can try again */
5748                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5749                 goto restart;
5750         }
5751
5752         /* Send pointers to protocol/runtime uCode image ... init code will
5753          * load and launch runtime uCode, which will send us another "Alive"
5754          * notification. */
5755         IWL_DEBUG_INFO("Initialization Alive received.\n");
5756         if (iwl3945_set_ucode_ptrs(priv)) {
5757                 /* Runtime instruction load won't happen;
5758                  * take it all the way back down so we can try again */
5759                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5760                 goto restart;
5761         }
5762         return;
5763
5764  restart:
5765         queue_work(priv->workqueue, &priv->restart);
5766 }
5767
5768
5769 /**
5770  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5771  *                   from protocol/runtime uCode (initialization uCode's
5772  *                   Alive gets handled by iwl3945_init_alive_start()).
5773  */
5774 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5775 {
5776         int rc = 0;
5777         int thermal_spin = 0;
5778         u32 rfkill;
5779
5780         IWL_DEBUG_INFO("Runtime Alive received.\n");
5781
5782         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5783                 /* We had an error bringing up the hardware, so take it
5784                  * all the way back down so we can try again */
5785                 IWL_DEBUG_INFO("Alive failed.\n");
5786                 goto restart;
5787         }
5788
5789         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5790          * This is a paranoid check, because we would not have gotten the
5791          * "runtime" alive if code weren't properly loaded.  */
5792         if (iwl3945_verify_ucode(priv)) {
5793                 /* Runtime instruction load was bad;
5794                  * take it all the way back down so we can try again */
5795                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5796                 goto restart;
5797         }
5798
5799         iwl3945_clear_stations_table(priv);
5800
5801         rc = iwl3945_grab_nic_access(priv);
5802         if (rc) {
5803                 IWL_WARNING("Can not read rfkill status from adapter\n");
5804                 return;
5805         }
5806
5807         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5808         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5809         iwl3945_release_nic_access(priv);
5810
5811         if (rfkill & 0x1) {
5812                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5813                 /* if rfkill is not on, then wait for thermal
5814                  * sensor in adapter to kick in */
5815                 while (iwl3945_hw_get_temperature(priv) == 0) {
5816                         thermal_spin++;
5817                         udelay(10);
5818                 }
5819
5820                 if (thermal_spin)
5821                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5822                                        thermal_spin * 10);
5823         } else
5824                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5825
5826         /* After the ALIVE response, we can send commands to 3945 uCode */
5827         set_bit(STATUS_ALIVE, &priv->status);
5828
5829         /* Clear out the uCode error bit if it is set */
5830         clear_bit(STATUS_FW_ERROR, &priv->status);
5831
5832         if (iwl3945_is_rfkill(priv))
5833                 return;
5834
5835         ieee80211_start_queues(priv->hw);
5836
5837         priv->active_rate = priv->rates_mask;
5838         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5839
5840         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5841
5842         if (iwl3945_is_associated(priv)) {
5843                 struct iwl3945_rxon_cmd *active_rxon =
5844                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5845
5846                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5847                        sizeof(priv->staging_rxon));
5848                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5849         } else {
5850                 /* Initialize our rx_config data */
5851                 iwl3945_connection_init_rx_config(priv);
5852                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5853         }
5854
5855         /* Configure Bluetooth device coexistence support */
5856         iwl3945_send_bt_config(priv);
5857
5858         /* Configure the adapter for unassociated operation */
5859         iwl3945_commit_rxon(priv);
5860
5861         /* At this point, the NIC is initialized and operational */
5862         priv->notif_missed_beacons = 0;
5863
5864         iwl3945_reg_txpower_periodic(priv);
5865
5866         iwl3945_led_register(priv);
5867
5868         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5869         set_bit(STATUS_READY, &priv->status);
5870         wake_up_interruptible(&priv->wait_command_queue);
5871
5872         if (priv->error_recovering)
5873                 iwl3945_error_recovery(priv);
5874
5875         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5876         return;
5877
5878  restart:
5879         queue_work(priv->workqueue, &priv->restart);
5880 }
5881
5882 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5883
5884 static void __iwl3945_down(struct iwl3945_priv *priv)
5885 {
5886         unsigned long flags;
5887         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5888         struct ieee80211_conf *conf = NULL;
5889
5890         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5891
5892         conf = ieee80211_get_hw_conf(priv->hw);
5893
5894         if (!exit_pending)
5895                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5896
5897         iwl3945_led_unregister(priv);
5898         iwl3945_clear_stations_table(priv);
5899
5900         /* Unblock any waiting calls */
5901         wake_up_interruptible_all(&priv->wait_command_queue);
5902
5903         /* Wipe out the EXIT_PENDING status bit if we are not actually
5904          * exiting the module */
5905         if (!exit_pending)
5906                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5907
5908         /* stop and reset the on-board processor */
5909         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5910
5911         /* tell the device to stop sending interrupts */
5912         spin_lock_irqsave(&priv->lock, flags);
5913         iwl3945_disable_interrupts(priv);
5914         spin_unlock_irqrestore(&priv->lock, flags);
5915         iwl_synchronize_irq(priv);
5916
5917         if (priv->mac80211_registered)
5918                 ieee80211_stop_queues(priv->hw);
5919
5920         /* If we have not previously called iwl3945_init() then
5921          * clear all bits but the RF Kill and SUSPEND bits and return */
5922         if (!iwl3945_is_init(priv)) {
5923                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5924                                         STATUS_RF_KILL_HW |
5925                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5926                                         STATUS_RF_KILL_SW |
5927                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5928                                         STATUS_GEO_CONFIGURED |
5929                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5930                                         STATUS_IN_SUSPEND;
5931                 goto exit;
5932         }
5933
5934         /* ...otherwise clear out all the status bits but the RF Kill and
5935          * SUSPEND bits and continue taking the NIC down. */
5936         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5937                                 STATUS_RF_KILL_HW |
5938                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5939                                 STATUS_RF_KILL_SW |
5940                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5941                                 STATUS_GEO_CONFIGURED |
5942                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5943                                 STATUS_IN_SUSPEND |
5944                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5945                                 STATUS_FW_ERROR;
5946
5947         spin_lock_irqsave(&priv->lock, flags);
5948         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5949         spin_unlock_irqrestore(&priv->lock, flags);
5950
5951         iwl3945_hw_txq_ctx_stop(priv);
5952         iwl3945_hw_rxq_stop(priv);
5953
5954         spin_lock_irqsave(&priv->lock, flags);
5955         if (!iwl3945_grab_nic_access(priv)) {
5956                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5957                                          APMG_CLK_VAL_DMA_CLK_RQT);
5958                 iwl3945_release_nic_access(priv);
5959         }
5960         spin_unlock_irqrestore(&priv->lock, flags);
5961
5962         udelay(5);
5963
5964         iwl3945_hw_nic_stop_master(priv);
5965         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5966         iwl3945_hw_nic_reset(priv);
5967
5968  exit:
5969         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5970
5971         if (priv->ibss_beacon)
5972                 dev_kfree_skb(priv->ibss_beacon);
5973         priv->ibss_beacon = NULL;
5974
5975         /* clear out any free frames */
5976         iwl3945_clear_free_frames(priv);
5977 }
5978
5979 static void iwl3945_down(struct iwl3945_priv *priv)
5980 {
5981         mutex_lock(&priv->mutex);
5982         __iwl3945_down(priv);
5983         mutex_unlock(&priv->mutex);
5984
5985         iwl3945_cancel_deferred_work(priv);
5986 }
5987
5988 #define MAX_HW_RESTARTS 5
5989
5990 static int __iwl3945_up(struct iwl3945_priv *priv)
5991 {
5992         int rc, i;
5993
5994         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5995                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5996                 return -EIO;
5997         }
5998
5999         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6000                 IWL_WARNING("Radio disabled by SW RF kill (module "
6001                             "parameter)\n");
6002                 return -ENODEV;
6003         }
6004
6005         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6006                 IWL_ERROR("ucode not available for device bringup\n");
6007                 return -EIO;
6008         }
6009
6010         /* If platform's RF_KILL switch is NOT set to KILL */
6011         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6012                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6013                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6014         else {
6015                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6016                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6017                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6018                         return -ENODEV;
6019                 }
6020         }
6021
6022         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6023
6024         rc = iwl3945_hw_nic_init(priv);
6025         if (rc) {
6026                 IWL_ERROR("Unable to int nic\n");
6027                 return rc;
6028         }
6029
6030         /* make sure rfkill handshake bits are cleared */
6031         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6032         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6033                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6034
6035         /* clear (again), then enable host interrupts */
6036         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6037         iwl3945_enable_interrupts(priv);
6038
6039         /* really make sure rfkill handshake bits are cleared */
6040         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6041         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6042
6043         /* Copy original ucode data image from disk into backup cache.
6044          * This will be used to initialize the on-board processor's
6045          * data SRAM for a clean start when the runtime program first loads. */
6046         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6047                priv->ucode_data.len);
6048
6049         /* We return success when we resume from suspend and rf_kill is on. */
6050         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6051                 return 0;
6052
6053         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6054
6055                 iwl3945_clear_stations_table(priv);
6056
6057                 /* load bootstrap state machine,
6058                  * load bootstrap program into processor's memory,
6059                  * prepare to load the "initialize" uCode */
6060                 rc = iwl3945_load_bsm(priv);
6061
6062                 if (rc) {
6063                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6064                         continue;
6065                 }
6066
6067                 /* start card; "initialize" will load runtime ucode */
6068                 iwl3945_nic_start(priv);
6069
6070                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6071
6072                 return 0;
6073         }
6074
6075         set_bit(STATUS_EXIT_PENDING, &priv->status);
6076         __iwl3945_down(priv);
6077
6078         /* tried to restart and config the device for as long as our
6079          * patience could withstand */
6080         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6081         return -EIO;
6082 }
6083
6084
6085 /*****************************************************************************
6086  *
6087  * Workqueue callbacks
6088  *
6089  *****************************************************************************/
6090
6091 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6092 {
6093         struct iwl3945_priv *priv =
6094             container_of(data, struct iwl3945_priv, init_alive_start.work);
6095
6096         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6097                 return;
6098
6099         mutex_lock(&priv->mutex);
6100         iwl3945_init_alive_start(priv);
6101         mutex_unlock(&priv->mutex);
6102 }
6103
6104 static void iwl3945_bg_alive_start(struct work_struct *data)
6105 {
6106         struct iwl3945_priv *priv =
6107             container_of(data, struct iwl3945_priv, alive_start.work);
6108
6109         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6110                 return;
6111
6112         mutex_lock(&priv->mutex);
6113         iwl3945_alive_start(priv);
6114         mutex_unlock(&priv->mutex);
6115 }
6116
6117 static void iwl3945_bg_rf_kill(struct work_struct *work)
6118 {
6119         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6120
6121         wake_up_interruptible(&priv->wait_command_queue);
6122
6123         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6124                 return;
6125
6126         mutex_lock(&priv->mutex);
6127
6128         if (!iwl3945_is_rfkill(priv)) {
6129                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6130                           "HW and/or SW RF Kill no longer active, restarting "
6131                           "device\n");
6132                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6133                         queue_work(priv->workqueue, &priv->restart);
6134         } else {
6135
6136                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6137                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6138                                           "disabled by SW switch\n");
6139                 else
6140                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6141                                     "Kill switch must be turned off for "
6142                                     "wireless networking to work.\n");
6143         }
6144         mutex_unlock(&priv->mutex);
6145 }
6146
6147 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6148
6149 static void iwl3945_bg_scan_check(struct work_struct *data)
6150 {
6151         struct iwl3945_priv *priv =
6152             container_of(data, struct iwl3945_priv, scan_check.work);
6153
6154         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6155                 return;
6156
6157         mutex_lock(&priv->mutex);
6158         if (test_bit(STATUS_SCANNING, &priv->status) ||
6159             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6160                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6161                           "Scan completion watchdog resetting adapter (%dms)\n",
6162                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6163
6164                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6165                         iwl3945_send_scan_abort(priv);
6166         }
6167         mutex_unlock(&priv->mutex);
6168 }
6169
6170 static void iwl3945_bg_request_scan(struct work_struct *data)
6171 {
6172         struct iwl3945_priv *priv =
6173             container_of(data, struct iwl3945_priv, request_scan);
6174         struct iwl3945_host_cmd cmd = {
6175                 .id = REPLY_SCAN_CMD,
6176                 .len = sizeof(struct iwl3945_scan_cmd),
6177                 .meta.flags = CMD_SIZE_HUGE,
6178         };
6179         int rc = 0;
6180         struct iwl3945_scan_cmd *scan;
6181         struct ieee80211_conf *conf = NULL;
6182         u8 direct_mask;
6183         enum ieee80211_band band;
6184
6185         conf = ieee80211_get_hw_conf(priv->hw);
6186
6187         mutex_lock(&priv->mutex);
6188
6189         if (!iwl3945_is_ready(priv)) {
6190                 IWL_WARNING("request scan called when driver not ready.\n");
6191                 goto done;
6192         }
6193
6194         /* Make sure the scan wasn't cancelled before this queued work
6195          * was given the chance to run... */
6196         if (!test_bit(STATUS_SCANNING, &priv->status))
6197                 goto done;
6198
6199         /* This should never be called or scheduled if there is currently
6200          * a scan active in the hardware. */
6201         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6202                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6203                                "Ignoring second request.\n");
6204                 rc = -EIO;
6205                 goto done;
6206         }
6207
6208         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6209                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6210                 goto done;
6211         }
6212
6213         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6214                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6215                 goto done;
6216         }
6217
6218         if (iwl3945_is_rfkill(priv)) {
6219                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6220                 goto done;
6221         }
6222
6223         if (!test_bit(STATUS_READY, &priv->status)) {
6224                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6225                 goto done;
6226         }
6227
6228         if (!priv->scan_bands) {
6229                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6230                 goto done;
6231         }
6232
6233         if (!priv->scan) {
6234                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6235                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6236                 if (!priv->scan) {
6237                         rc = -ENOMEM;
6238                         goto done;
6239                 }
6240         }
6241         scan = priv->scan;
6242         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6243
6244         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6245         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6246
6247         if (iwl3945_is_associated(priv)) {
6248                 u16 interval = 0;
6249                 u32 extra;
6250                 u32 suspend_time = 100;
6251                 u32 scan_suspend_time = 100;
6252                 unsigned long flags;
6253
6254                 IWL_DEBUG_INFO("Scanning while associated...\n");
6255
6256                 spin_lock_irqsave(&priv->lock, flags);
6257                 interval = priv->beacon_int;
6258                 spin_unlock_irqrestore(&priv->lock, flags);
6259
6260                 scan->suspend_time = 0;
6261                 scan->max_out_time = cpu_to_le32(200 * 1024);
6262                 if (!interval)
6263                         interval = suspend_time;
6264                 /*
6265                  * suspend time format:
6266                  *  0-19: beacon interval in usec (time before exec.)
6267                  * 20-23: 0
6268                  * 24-31: number of beacons (suspend between channels)
6269                  */
6270
6271                 extra = (suspend_time / interval) << 24;
6272                 scan_suspend_time = 0xFF0FFFFF &
6273                     (extra | ((suspend_time % interval) * 1024));
6274
6275                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6276                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6277                                scan_suspend_time, interval);
6278         }
6279
6280         /* We should add the ability for user to lock to PASSIVE ONLY */
6281         if (priv->one_direct_scan) {
6282                 IWL_DEBUG_SCAN
6283                     ("Kicking off one direct scan for '%s'\n",
6284                      iwl3945_escape_essid(priv->direct_ssid,
6285                                       priv->direct_ssid_len));
6286                 scan->direct_scan[0].id = WLAN_EID_SSID;
6287                 scan->direct_scan[0].len = priv->direct_ssid_len;
6288                 memcpy(scan->direct_scan[0].ssid,
6289                        priv->direct_ssid, priv->direct_ssid_len);
6290                 direct_mask = 1;
6291         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6292                 IWL_DEBUG_SCAN
6293                   ("Kicking off one direct scan for '%s' when not associated\n",
6294                    iwl3945_escape_essid(priv->essid, priv->essid_len));
6295                 scan->direct_scan[0].id = WLAN_EID_SSID;
6296                 scan->direct_scan[0].len = priv->essid_len;
6297                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6298                 direct_mask = 1;
6299         } else {
6300                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6301                 direct_mask = 0;
6302         }
6303
6304         /* We don't build a direct scan probe request; the uCode will do
6305          * that based on the direct_mask added to each channel entry */
6306         scan->tx_cmd.len = cpu_to_le16(
6307                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6308                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6309         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6310         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6311         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6312
6313         /* flags + rate selection */
6314
6315         switch (priv->scan_bands) {
6316         case 2:
6317                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6318                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6319                 scan->good_CRC_th = 0;
6320                 band = IEEE80211_BAND_2GHZ;
6321                 break;
6322
6323         case 1:
6324                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6325                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6326                 band = IEEE80211_BAND_5GHZ;
6327                 break;
6328
6329         default:
6330                 IWL_WARNING("Invalid scan band count\n");
6331                 goto done;
6332         }
6333
6334         /* select Rx antennas */
6335         scan->flags |= iwl3945_get_antenna_flags(priv);
6336
6337         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6338                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6339
6340         if (direct_mask)
6341                 scan->channel_count =
6342                         iwl3945_get_channels_for_scan(
6343                                 priv, band, 1, /* active */
6344                                 direct_mask,
6345                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6346         else
6347                 scan->channel_count =
6348                         iwl3945_get_channels_for_scan(
6349                                 priv, band, 0, /* passive */
6350                                 direct_mask,
6351                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6352
6353         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6354             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6355         cmd.data = scan;
6356         scan->len = cpu_to_le16(cmd.len);
6357
6358         set_bit(STATUS_SCAN_HW, &priv->status);
6359         rc = iwl3945_send_cmd_sync(priv, &cmd);
6360         if (rc)
6361                 goto done;
6362
6363         queue_delayed_work(priv->workqueue, &priv->scan_check,
6364                            IWL_SCAN_CHECK_WATCHDOG);
6365
6366         mutex_unlock(&priv->mutex);
6367         return;
6368
6369  done:
6370         /* inform mac80211 scan aborted */
6371         queue_work(priv->workqueue, &priv->scan_completed);
6372         mutex_unlock(&priv->mutex);
6373 }
6374
6375 static void iwl3945_bg_up(struct work_struct *data)
6376 {
6377         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6378
6379         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6380                 return;
6381
6382         mutex_lock(&priv->mutex);
6383         __iwl3945_up(priv);
6384         mutex_unlock(&priv->mutex);
6385 }
6386
6387 static void iwl3945_bg_restart(struct work_struct *data)
6388 {
6389         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6390
6391         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6392                 return;
6393
6394         iwl3945_down(priv);
6395         queue_work(priv->workqueue, &priv->up);
6396 }
6397
6398 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6399 {
6400         struct iwl3945_priv *priv =
6401             container_of(data, struct iwl3945_priv, rx_replenish);
6402
6403         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6404                 return;
6405
6406         mutex_lock(&priv->mutex);
6407         iwl3945_rx_replenish(priv);
6408         mutex_unlock(&priv->mutex);
6409 }
6410
6411 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6412
6413 static void iwl3945_bg_post_associate(struct work_struct *data)
6414 {
6415         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6416                                              post_associate.work);
6417
6418         int rc = 0;
6419         struct ieee80211_conf *conf = NULL;
6420         DECLARE_MAC_BUF(mac);
6421
6422         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6423                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6424                 return;
6425         }
6426
6427
6428         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6429                         priv->assoc_id,
6430                         print_mac(mac, priv->active_rxon.bssid_addr));
6431
6432         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6433                 return;
6434
6435         mutex_lock(&priv->mutex);
6436
6437         if (!priv->vif || !priv->is_open) {
6438                 mutex_unlock(&priv->mutex);
6439                 return;
6440         }
6441         iwl3945_scan_cancel_timeout(priv, 200);
6442
6443         conf = ieee80211_get_hw_conf(priv->hw);
6444
6445         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6446         iwl3945_commit_rxon(priv);
6447
6448         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6449         iwl3945_setup_rxon_timing(priv);
6450         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6451                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6452         if (rc)
6453                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6454                             "Attempting to continue.\n");
6455
6456         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6457
6458         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6459
6460         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6461                         priv->assoc_id, priv->beacon_int);
6462
6463         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6464                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6465         else
6466                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6467
6468         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6469                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6470                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6471                 else
6472                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6473
6474                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6475                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6476
6477         }
6478
6479         iwl3945_commit_rxon(priv);
6480
6481         switch (priv->iw_mode) {
6482         case IEEE80211_IF_TYPE_STA:
6483                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6484                 break;
6485
6486         case IEEE80211_IF_TYPE_IBSS:
6487
6488                 /* clear out the station table */
6489                 iwl3945_clear_stations_table(priv);
6490
6491                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6492                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6493                 iwl3945_sync_sta(priv, IWL_STA_ID,
6494                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6495                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6496                                  CMD_ASYNC);
6497                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6498                 iwl3945_send_beacon_cmd(priv);
6499
6500                 break;
6501
6502         default:
6503                  IWL_ERROR("%s Should not be called in %d mode\n",
6504                            __FUNCTION__, priv->iw_mode);
6505                 break;
6506         }
6507
6508         iwl3945_sequence_reset(priv);
6509
6510         iwl3945_activate_qos(priv, 0);
6511
6512         /* we have just associated, don't start scan too early */
6513         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6514         mutex_unlock(&priv->mutex);
6515 }
6516
6517 static void iwl3945_bg_abort_scan(struct work_struct *work)
6518 {
6519         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6520
6521         if (!iwl3945_is_ready(priv))
6522                 return;
6523
6524         mutex_lock(&priv->mutex);
6525
6526         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6527         iwl3945_send_scan_abort(priv);
6528
6529         mutex_unlock(&priv->mutex);
6530 }
6531
6532 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6533
6534 static void iwl3945_bg_scan_completed(struct work_struct *work)
6535 {
6536         struct iwl3945_priv *priv =
6537             container_of(work, struct iwl3945_priv, scan_completed);
6538
6539         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6540
6541         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6542                 return;
6543
6544         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6545                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6546
6547         ieee80211_scan_completed(priv->hw);
6548
6549         /* Since setting the TXPOWER may have been deferred while
6550          * performing the scan, fire one off */
6551         mutex_lock(&priv->mutex);
6552         iwl3945_hw_reg_send_txpower(priv);
6553         mutex_unlock(&priv->mutex);
6554 }
6555
6556 /*****************************************************************************
6557  *
6558  * mac80211 entry point functions
6559  *
6560  *****************************************************************************/
6561
6562 #define UCODE_READY_TIMEOUT     (2 * HZ)
6563
6564 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6565 {
6566         struct iwl3945_priv *priv = hw->priv;
6567         int ret;
6568
6569         IWL_DEBUG_MAC80211("enter\n");
6570
6571         if (pci_enable_device(priv->pci_dev)) {
6572                 IWL_ERROR("Fail to pci_enable_device\n");
6573                 return -ENODEV;
6574         }
6575         pci_restore_state(priv->pci_dev);
6576         pci_enable_msi(priv->pci_dev);
6577
6578         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6579                           DRV_NAME, priv);
6580         if (ret) {
6581                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6582                 goto out_disable_msi;
6583         }
6584
6585         /* we should be verifying the device is ready to be opened */
6586         mutex_lock(&priv->mutex);
6587
6588         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6589         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6590          * ucode filename and max sizes are card-specific. */
6591
6592         if (!priv->ucode_code.len) {
6593                 ret = iwl3945_read_ucode(priv);
6594                 if (ret) {
6595                         IWL_ERROR("Could not read microcode: %d\n", ret);
6596                         mutex_unlock(&priv->mutex);
6597                         goto out_release_irq;
6598                 }
6599         }
6600
6601         ret = __iwl3945_up(priv);
6602
6603         mutex_unlock(&priv->mutex);
6604
6605         if (ret)
6606                 goto out_release_irq;
6607
6608         IWL_DEBUG_INFO("Start UP work.\n");
6609
6610         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6611                 return 0;
6612
6613         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6614          * mac80211 will not be run successfully. */
6615         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6616                         test_bit(STATUS_READY, &priv->status),
6617                         UCODE_READY_TIMEOUT);
6618         if (!ret) {
6619                 if (!test_bit(STATUS_READY, &priv->status)) {
6620                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6621                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6622                         ret = -ETIMEDOUT;
6623                         goto out_release_irq;
6624                 }
6625         }
6626
6627         priv->is_open = 1;
6628         IWL_DEBUG_MAC80211("leave\n");
6629         return 0;
6630
6631 out_release_irq:
6632         free_irq(priv->pci_dev->irq, priv);
6633 out_disable_msi:
6634         pci_disable_msi(priv->pci_dev);
6635         pci_disable_device(priv->pci_dev);
6636         priv->is_open = 0;
6637         IWL_DEBUG_MAC80211("leave - failed\n");
6638         return ret;
6639 }
6640
6641 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6642 {
6643         struct iwl3945_priv *priv = hw->priv;
6644
6645         IWL_DEBUG_MAC80211("enter\n");
6646
6647         if (!priv->is_open) {
6648                 IWL_DEBUG_MAC80211("leave - skip\n");
6649                 return;
6650         }
6651
6652         priv->is_open = 0;
6653
6654         if (iwl3945_is_ready_rf(priv)) {
6655                 /* stop mac, cancel any scan request and clear
6656                  * RXON_FILTER_ASSOC_MSK BIT
6657                  */
6658                 mutex_lock(&priv->mutex);
6659                 iwl3945_scan_cancel_timeout(priv, 100);
6660                 cancel_delayed_work(&priv->post_associate);
6661                 mutex_unlock(&priv->mutex);
6662         }
6663
6664         iwl3945_down(priv);
6665
6666         flush_workqueue(priv->workqueue);
6667         free_irq(priv->pci_dev->irq, priv);
6668         pci_disable_msi(priv->pci_dev);
6669         pci_save_state(priv->pci_dev);
6670         pci_disable_device(priv->pci_dev);
6671
6672         IWL_DEBUG_MAC80211("leave\n");
6673 }
6674
6675 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6676                       struct ieee80211_tx_control *ctl)
6677 {
6678         struct iwl3945_priv *priv = hw->priv;
6679
6680         IWL_DEBUG_MAC80211("enter\n");
6681
6682         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6683                 IWL_DEBUG_MAC80211("leave - monitor\n");
6684                 return -1;
6685         }
6686
6687         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6688                      ctl->tx_rate->bitrate);
6689
6690         if (iwl3945_tx_skb(priv, skb, ctl))
6691                 dev_kfree_skb_any(skb);
6692
6693         IWL_DEBUG_MAC80211("leave\n");
6694         return 0;
6695 }
6696
6697 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6698                                  struct ieee80211_if_init_conf *conf)
6699 {
6700         struct iwl3945_priv *priv = hw->priv;
6701         unsigned long flags;
6702         DECLARE_MAC_BUF(mac);
6703
6704         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6705
6706         if (priv->vif) {
6707                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6708                 return -EOPNOTSUPP;
6709         }
6710
6711         spin_lock_irqsave(&priv->lock, flags);
6712         priv->vif = conf->vif;
6713
6714         spin_unlock_irqrestore(&priv->lock, flags);
6715
6716         mutex_lock(&priv->mutex);
6717
6718         if (conf->mac_addr) {
6719                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6720                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6721         }
6722
6723         if (iwl3945_is_ready(priv))
6724                 iwl3945_set_mode(priv, conf->type);
6725
6726         mutex_unlock(&priv->mutex);
6727
6728         IWL_DEBUG_MAC80211("leave\n");
6729         return 0;
6730 }
6731
6732 /**
6733  * iwl3945_mac_config - mac80211 config callback
6734  *
6735  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6736  * be set inappropriately and the driver currently sets the hardware up to
6737  * use it whenever needed.
6738  */
6739 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6740 {
6741         struct iwl3945_priv *priv = hw->priv;
6742         const struct iwl3945_channel_info *ch_info;
6743         unsigned long flags;
6744         int ret = 0;
6745
6746         mutex_lock(&priv->mutex);
6747         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6748
6749         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6750
6751         if (!iwl3945_is_ready(priv)) {
6752                 IWL_DEBUG_MAC80211("leave - not ready\n");
6753                 ret = -EIO;
6754                 goto out;
6755         }
6756
6757         if (unlikely(!iwl3945_param_disable_hw_scan &&
6758                      test_bit(STATUS_SCANNING, &priv->status))) {
6759                 IWL_DEBUG_MAC80211("leave - scanning\n");
6760                 set_bit(STATUS_CONF_PENDING, &priv->status);
6761                 mutex_unlock(&priv->mutex);
6762                 return 0;
6763         }
6764
6765         spin_lock_irqsave(&priv->lock, flags);
6766
6767         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6768                                            conf->channel->hw_value);
6769         if (!is_channel_valid(ch_info)) {
6770                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6771                                conf->channel->hw_value, conf->channel->band);
6772                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6773                 spin_unlock_irqrestore(&priv->lock, flags);
6774                 ret = -EINVAL;
6775                 goto out;
6776         }
6777
6778         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6779
6780         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6781
6782         /* The list of supported rates and rate mask can be different
6783          * for each phymode; since the phymode may have changed, reset
6784          * the rate mask to what mac80211 lists */
6785         iwl3945_set_rate(priv);
6786
6787         spin_unlock_irqrestore(&priv->lock, flags);
6788
6789 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6790         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6791                 iwl3945_hw_channel_switch(priv, conf->channel);
6792                 goto out;
6793         }
6794 #endif
6795
6796         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6797
6798         if (!conf->radio_enabled) {
6799                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6800                 goto out;
6801         }
6802
6803         if (iwl3945_is_rfkill(priv)) {
6804                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6805                 ret = -EIO;
6806                 goto out;
6807         }
6808
6809         iwl3945_set_rate(priv);
6810
6811         if (memcmp(&priv->active_rxon,
6812                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6813                 iwl3945_commit_rxon(priv);
6814         else
6815                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6816
6817         IWL_DEBUG_MAC80211("leave\n");
6818
6819 out:
6820         clear_bit(STATUS_CONF_PENDING, &priv->status);
6821         mutex_unlock(&priv->mutex);
6822         return ret;
6823 }
6824
6825 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6826 {
6827         int rc = 0;
6828
6829         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6830                 return;
6831
6832         /* The following should be done only at AP bring up */
6833         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6834
6835                 /* RXON - unassoc (to set timing command) */
6836                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6837                 iwl3945_commit_rxon(priv);
6838
6839                 /* RXON Timing */
6840                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6841                 iwl3945_setup_rxon_timing(priv);
6842                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6843                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6844                 if (rc)
6845                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6846                                         "Attempting to continue.\n");
6847
6848                 /* FIXME: what should be the assoc_id for AP? */
6849                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6850                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6851                         priv->staging_rxon.flags |=
6852                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6853                 else
6854                         priv->staging_rxon.flags &=
6855                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6856
6857                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6858                         if (priv->assoc_capability &
6859                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6860                                 priv->staging_rxon.flags |=
6861                                         RXON_FLG_SHORT_SLOT_MSK;
6862                         else
6863                                 priv->staging_rxon.flags &=
6864                                         ~RXON_FLG_SHORT_SLOT_MSK;
6865
6866                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6867                                 priv->staging_rxon.flags &=
6868                                         ~RXON_FLG_SHORT_SLOT_MSK;
6869                 }
6870                 /* restore RXON assoc */
6871                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6872                 iwl3945_commit_rxon(priv);
6873                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6874         }
6875         iwl3945_send_beacon_cmd(priv);
6876
6877         /* FIXME - we need to add code here to detect a totally new
6878          * configuration, reset the AP, unassoc, rxon timing, assoc,
6879          * clear sta table, add BCAST sta... */
6880 }
6881
6882 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6883                                         struct ieee80211_vif *vif,
6884                                     struct ieee80211_if_conf *conf)
6885 {
6886         struct iwl3945_priv *priv = hw->priv;
6887         DECLARE_MAC_BUF(mac);
6888         unsigned long flags;
6889         int rc;
6890
6891         if (conf == NULL)
6892                 return -EIO;
6893
6894         if (priv->vif != vif) {
6895                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6896                 return 0;
6897         }
6898
6899         /* XXX: this MUST use conf->mac_addr */
6900
6901         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6902             (!conf->beacon || !conf->ssid_len)) {
6903                 IWL_DEBUG_MAC80211
6904                     ("Leaving in AP mode because HostAPD is not ready.\n");
6905                 return 0;
6906         }
6907
6908         if (!iwl3945_is_alive(priv))
6909                 return -EAGAIN;
6910
6911         mutex_lock(&priv->mutex);
6912
6913         if (conf->bssid)
6914                 IWL_DEBUG_MAC80211("bssid: %s\n",
6915                                    print_mac(mac, conf->bssid));
6916
6917 /*
6918  * very dubious code was here; the probe filtering flag is never set:
6919  *
6920         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6921             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6922  */
6923
6924         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6925                 if (!conf->bssid) {
6926                         conf->bssid = priv->mac_addr;
6927                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6928                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6929                                            print_mac(mac, conf->bssid));
6930                 }
6931                 if (priv->ibss_beacon)
6932                         dev_kfree_skb(priv->ibss_beacon);
6933
6934                 priv->ibss_beacon = conf->beacon;
6935         }
6936
6937         if (iwl3945_is_rfkill(priv))
6938                 goto done;
6939
6940         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6941             !is_multicast_ether_addr(conf->bssid)) {
6942                 /* If there is currently a HW scan going on in the background
6943                  * then we need to cancel it else the RXON below will fail. */
6944                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6945                         IWL_WARNING("Aborted scan still in progress "
6946                                     "after 100ms\n");
6947                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6948                         mutex_unlock(&priv->mutex);
6949                         return -EAGAIN;
6950                 }
6951                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6952
6953                 /* TODO: Audit driver for usage of these members and see
6954                  * if mac80211 deprecates them (priv->bssid looks like it
6955                  * shouldn't be there, but I haven't scanned the IBSS code
6956                  * to verify) - jpk */
6957                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6958
6959                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6960                         iwl3945_config_ap(priv);
6961                 else {
6962                         rc = iwl3945_commit_rxon(priv);
6963                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6964                                 iwl3945_add_station(priv,
6965                                         priv->active_rxon.bssid_addr, 1, 0);
6966                 }
6967
6968         } else {
6969                 iwl3945_scan_cancel_timeout(priv, 100);
6970                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6971                 iwl3945_commit_rxon(priv);
6972         }
6973
6974  done:
6975         spin_lock_irqsave(&priv->lock, flags);
6976         if (!conf->ssid_len)
6977                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6978         else
6979                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6980
6981         priv->essid_len = conf->ssid_len;
6982         spin_unlock_irqrestore(&priv->lock, flags);
6983
6984         IWL_DEBUG_MAC80211("leave\n");
6985         mutex_unlock(&priv->mutex);
6986
6987         return 0;
6988 }
6989
6990 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6991                                  unsigned int changed_flags,
6992                                  unsigned int *total_flags,
6993                                  int mc_count, struct dev_addr_list *mc_list)
6994 {
6995         /*
6996          * XXX: dummy
6997          * see also iwl3945_connection_init_rx_config
6998          */
6999         *total_flags = 0;
7000 }
7001
7002 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7003                                      struct ieee80211_if_init_conf *conf)
7004 {
7005         struct iwl3945_priv *priv = hw->priv;
7006
7007         IWL_DEBUG_MAC80211("enter\n");
7008
7009         mutex_lock(&priv->mutex);
7010
7011         if (iwl3945_is_ready_rf(priv)) {
7012                 iwl3945_scan_cancel_timeout(priv, 100);
7013                 cancel_delayed_work(&priv->post_associate);
7014                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7015                 iwl3945_commit_rxon(priv);
7016         }
7017         if (priv->vif == conf->vif) {
7018                 priv->vif = NULL;
7019                 memset(priv->bssid, 0, ETH_ALEN);
7020                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7021                 priv->essid_len = 0;
7022         }
7023         mutex_unlock(&priv->mutex);
7024
7025         IWL_DEBUG_MAC80211("leave\n");
7026 }
7027
7028 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7029 {
7030         int rc = 0;
7031         unsigned long flags;
7032         struct iwl3945_priv *priv = hw->priv;
7033
7034         IWL_DEBUG_MAC80211("enter\n");
7035
7036         mutex_lock(&priv->mutex);
7037         spin_lock_irqsave(&priv->lock, flags);
7038
7039         if (!iwl3945_is_ready_rf(priv)) {
7040                 rc = -EIO;
7041                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7042                 goto out_unlock;
7043         }
7044
7045         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7046                 rc = -EIO;
7047                 IWL_ERROR("ERROR: APs don't scan\n");
7048                 goto out_unlock;
7049         }
7050
7051         /* we don't schedule scan within next_scan_jiffies period */
7052         if (priv->next_scan_jiffies &&
7053                         time_after(priv->next_scan_jiffies, jiffies)) {
7054                 rc = -EAGAIN;
7055                 goto out_unlock;
7056         }
7057         /* if we just finished scan ask for delay */
7058         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7059                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7060                 rc = -EAGAIN;
7061                 goto out_unlock;
7062         }
7063         if (len) {
7064                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7065                                iwl3945_escape_essid(ssid, len), (int)len);
7066
7067                 priv->one_direct_scan = 1;
7068                 priv->direct_ssid_len = (u8)
7069                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7070                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7071         } else
7072                 priv->one_direct_scan = 0;
7073
7074         rc = iwl3945_scan_initiate(priv);
7075
7076         IWL_DEBUG_MAC80211("leave\n");
7077
7078 out_unlock:
7079         spin_unlock_irqrestore(&priv->lock, flags);
7080         mutex_unlock(&priv->mutex);
7081
7082         return rc;
7083 }
7084
7085 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7086                            const u8 *local_addr, const u8 *addr,
7087                            struct ieee80211_key_conf *key)
7088 {
7089         struct iwl3945_priv *priv = hw->priv;
7090         int rc = 0;
7091         u8 sta_id;
7092
7093         IWL_DEBUG_MAC80211("enter\n");
7094
7095         if (!iwl3945_param_hwcrypto) {
7096                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7097                 return -EOPNOTSUPP;
7098         }
7099
7100         if (is_zero_ether_addr(addr))
7101                 /* only support pairwise keys */
7102                 return -EOPNOTSUPP;
7103
7104         sta_id = iwl3945_hw_find_station(priv, addr);
7105         if (sta_id == IWL_INVALID_STATION) {
7106                 DECLARE_MAC_BUF(mac);
7107
7108                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7109                                    print_mac(mac, addr));
7110                 return -EINVAL;
7111         }
7112
7113         mutex_lock(&priv->mutex);
7114
7115         iwl3945_scan_cancel_timeout(priv, 100);
7116
7117         switch (cmd) {
7118         case  SET_KEY:
7119                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7120                 if (!rc) {
7121                         iwl3945_set_rxon_hwcrypto(priv, 1);
7122                         iwl3945_commit_rxon(priv);
7123                         key->hw_key_idx = sta_id;
7124                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7125                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7126                 }
7127                 break;
7128         case DISABLE_KEY:
7129                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7130                 if (!rc) {
7131                         iwl3945_set_rxon_hwcrypto(priv, 0);
7132                         iwl3945_commit_rxon(priv);
7133                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7134                 }
7135                 break;
7136         default:
7137                 rc = -EINVAL;
7138         }
7139
7140         IWL_DEBUG_MAC80211("leave\n");
7141         mutex_unlock(&priv->mutex);
7142
7143         return rc;
7144 }
7145
7146 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
7147                            const struct ieee80211_tx_queue_params *params)
7148 {
7149         struct iwl3945_priv *priv = hw->priv;
7150         unsigned long flags;
7151         int q;
7152
7153         IWL_DEBUG_MAC80211("enter\n");
7154
7155         if (!iwl3945_is_ready_rf(priv)) {
7156                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7157                 return -EIO;
7158         }
7159
7160         if (queue >= AC_NUM) {
7161                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7162                 return 0;
7163         }
7164
7165         if (!priv->qos_data.qos_enable) {
7166                 priv->qos_data.qos_active = 0;
7167                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7168                 return 0;
7169         }
7170         q = AC_NUM - 1 - queue;
7171
7172         spin_lock_irqsave(&priv->lock, flags);
7173
7174         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7175         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7176         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7177         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7178                         cpu_to_le16((params->txop * 32));
7179
7180         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7181         priv->qos_data.qos_active = 1;
7182
7183         spin_unlock_irqrestore(&priv->lock, flags);
7184
7185         mutex_lock(&priv->mutex);
7186         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7187                 iwl3945_activate_qos(priv, 1);
7188         else if (priv->assoc_id && iwl3945_is_associated(priv))
7189                 iwl3945_activate_qos(priv, 0);
7190
7191         mutex_unlock(&priv->mutex);
7192
7193         IWL_DEBUG_MAC80211("leave\n");
7194         return 0;
7195 }
7196
7197 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7198                                 struct ieee80211_tx_queue_stats *stats)
7199 {
7200         struct iwl3945_priv *priv = hw->priv;
7201         int i, avail;
7202         struct iwl3945_tx_queue *txq;
7203         struct iwl3945_queue *q;
7204         unsigned long flags;
7205
7206         IWL_DEBUG_MAC80211("enter\n");
7207
7208         if (!iwl3945_is_ready_rf(priv)) {
7209                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7210                 return -EIO;
7211         }
7212
7213         spin_lock_irqsave(&priv->lock, flags);
7214
7215         for (i = 0; i < AC_NUM; i++) {
7216                 txq = &priv->txq[i];
7217                 q = &txq->q;
7218                 avail = iwl3945_queue_space(q);
7219
7220                 stats[i].len = q->n_window - avail;
7221                 stats[i].limit = q->n_window - q->high_mark;
7222                 stats[i].count = q->n_window;
7223
7224         }
7225         spin_unlock_irqrestore(&priv->lock, flags);
7226
7227         IWL_DEBUG_MAC80211("leave\n");
7228
7229         return 0;
7230 }
7231
7232 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7233                              struct ieee80211_low_level_stats *stats)
7234 {
7235         IWL_DEBUG_MAC80211("enter\n");
7236         IWL_DEBUG_MAC80211("leave\n");
7237
7238         return 0;
7239 }
7240
7241 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7242 {
7243         IWL_DEBUG_MAC80211("enter\n");
7244         IWL_DEBUG_MAC80211("leave\n");
7245
7246         return 0;
7247 }
7248
7249 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7250 {
7251         struct iwl3945_priv *priv = hw->priv;
7252         unsigned long flags;
7253
7254         mutex_lock(&priv->mutex);
7255         IWL_DEBUG_MAC80211("enter\n");
7256
7257         iwl3945_reset_qos(priv);
7258
7259         cancel_delayed_work(&priv->post_associate);
7260
7261         spin_lock_irqsave(&priv->lock, flags);
7262         priv->assoc_id = 0;
7263         priv->assoc_capability = 0;
7264         priv->call_post_assoc_from_beacon = 0;
7265
7266         /* new association get rid of ibss beacon skb */
7267         if (priv->ibss_beacon)
7268                 dev_kfree_skb(priv->ibss_beacon);
7269
7270         priv->ibss_beacon = NULL;
7271
7272         priv->beacon_int = priv->hw->conf.beacon_int;
7273         priv->timestamp1 = 0;
7274         priv->timestamp0 = 0;
7275         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7276                 priv->beacon_int = 0;
7277
7278         spin_unlock_irqrestore(&priv->lock, flags);
7279
7280         if (!iwl3945_is_ready_rf(priv)) {
7281                 IWL_DEBUG_MAC80211("leave - not ready\n");
7282                 mutex_unlock(&priv->mutex);
7283                 return;
7284         }
7285
7286         /* we are restarting association process
7287          * clear RXON_FILTER_ASSOC_MSK bit
7288         */
7289         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7290                 iwl3945_scan_cancel_timeout(priv, 100);
7291                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7292                 iwl3945_commit_rxon(priv);
7293         }
7294
7295         /* Per mac80211.h: This is only used in IBSS mode... */
7296         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7297
7298                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7299                 mutex_unlock(&priv->mutex);
7300                 return;
7301         }
7302
7303         iwl3945_set_rate(priv);
7304
7305         mutex_unlock(&priv->mutex);
7306
7307         IWL_DEBUG_MAC80211("leave\n");
7308
7309 }
7310
7311 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7312                                  struct ieee80211_tx_control *control)
7313 {
7314         struct iwl3945_priv *priv = hw->priv;
7315         unsigned long flags;
7316
7317         mutex_lock(&priv->mutex);
7318         IWL_DEBUG_MAC80211("enter\n");
7319
7320         if (!iwl3945_is_ready_rf(priv)) {
7321                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7322                 mutex_unlock(&priv->mutex);
7323                 return -EIO;
7324         }
7325
7326         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7327                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7328                 mutex_unlock(&priv->mutex);
7329                 return -EIO;
7330         }
7331
7332         spin_lock_irqsave(&priv->lock, flags);
7333
7334         if (priv->ibss_beacon)
7335                 dev_kfree_skb(priv->ibss_beacon);
7336
7337         priv->ibss_beacon = skb;
7338
7339         priv->assoc_id = 0;
7340
7341         IWL_DEBUG_MAC80211("leave\n");
7342         spin_unlock_irqrestore(&priv->lock, flags);
7343
7344         iwl3945_reset_qos(priv);
7345
7346         queue_work(priv->workqueue, &priv->post_associate.work);
7347
7348         mutex_unlock(&priv->mutex);
7349
7350         return 0;
7351 }
7352
7353 /*****************************************************************************
7354  *
7355  * sysfs attributes
7356  *
7357  *****************************************************************************/
7358
7359 #ifdef CONFIG_IWL3945_DEBUG
7360
7361 /*
7362  * The following adds a new attribute to the sysfs representation
7363  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7364  * used for controlling the debug level.
7365  *
7366  * See the level definitions in iwl for details.
7367  */
7368
7369 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7370 {
7371         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7372 }
7373 static ssize_t store_debug_level(struct device_driver *d,
7374                                  const char *buf, size_t count)
7375 {
7376         char *p = (char *)buf;
7377         u32 val;
7378
7379         val = simple_strtoul(p, &p, 0);
7380         if (p == buf)
7381                 printk(KERN_INFO DRV_NAME
7382                        ": %s is not in hex or decimal form.\n", buf);
7383         else
7384                 iwl3945_debug_level = val;
7385
7386         return strnlen(buf, count);
7387 }
7388
7389 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7390                    show_debug_level, store_debug_level);
7391
7392 #endif /* CONFIG_IWL3945_DEBUG */
7393
7394 static ssize_t show_rf_kill(struct device *d,
7395                             struct device_attribute *attr, char *buf)
7396 {
7397         /*
7398          * 0 - RF kill not enabled
7399          * 1 - SW based RF kill active (sysfs)
7400          * 2 - HW based RF kill active
7401          * 3 - Both HW and SW based RF kill active
7402          */
7403         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7404         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7405                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7406
7407         return sprintf(buf, "%i\n", val);
7408 }
7409
7410 static ssize_t store_rf_kill(struct device *d,
7411                              struct device_attribute *attr,
7412                              const char *buf, size_t count)
7413 {
7414         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7415
7416         mutex_lock(&priv->mutex);
7417         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7418         mutex_unlock(&priv->mutex);
7419
7420         return count;
7421 }
7422
7423 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7424
7425 static ssize_t show_temperature(struct device *d,
7426                                 struct device_attribute *attr, char *buf)
7427 {
7428         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7429
7430         if (!iwl3945_is_alive(priv))
7431                 return -EAGAIN;
7432
7433         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7434 }
7435
7436 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7437
7438 static ssize_t show_rs_window(struct device *d,
7439                               struct device_attribute *attr,
7440                               char *buf)
7441 {
7442         struct iwl3945_priv *priv = d->driver_data;
7443         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7444 }
7445 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7446
7447 static ssize_t show_tx_power(struct device *d,
7448                              struct device_attribute *attr, char *buf)
7449 {
7450         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7451         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7452 }
7453
7454 static ssize_t store_tx_power(struct device *d,
7455                               struct device_attribute *attr,
7456                               const char *buf, size_t count)
7457 {
7458         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7459         char *p = (char *)buf;
7460         u32 val;
7461
7462         val = simple_strtoul(p, &p, 10);
7463         if (p == buf)
7464                 printk(KERN_INFO DRV_NAME
7465                        ": %s is not in decimal form.\n", buf);
7466         else
7467                 iwl3945_hw_reg_set_txpower(priv, val);
7468
7469         return count;
7470 }
7471
7472 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7473
7474 static ssize_t show_flags(struct device *d,
7475                           struct device_attribute *attr, char *buf)
7476 {
7477         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7478
7479         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7480 }
7481
7482 static ssize_t store_flags(struct device *d,
7483                            struct device_attribute *attr,
7484                            const char *buf, size_t count)
7485 {
7486         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7487         u32 flags = simple_strtoul(buf, NULL, 0);
7488
7489         mutex_lock(&priv->mutex);
7490         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7491                 /* Cancel any currently running scans... */
7492                 if (iwl3945_scan_cancel_timeout(priv, 100))
7493                         IWL_WARNING("Could not cancel scan.\n");
7494                 else {
7495                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7496                                        flags);
7497                         priv->staging_rxon.flags = cpu_to_le32(flags);
7498                         iwl3945_commit_rxon(priv);
7499                 }
7500         }
7501         mutex_unlock(&priv->mutex);
7502
7503         return count;
7504 }
7505
7506 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7507
7508 static ssize_t show_filter_flags(struct device *d,
7509                                  struct device_attribute *attr, char *buf)
7510 {
7511         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7512
7513         return sprintf(buf, "0x%04X\n",
7514                 le32_to_cpu(priv->active_rxon.filter_flags));
7515 }
7516
7517 static ssize_t store_filter_flags(struct device *d,
7518                                   struct device_attribute *attr,
7519                                   const char *buf, size_t count)
7520 {
7521         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7522         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7523
7524         mutex_lock(&priv->mutex);
7525         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7526                 /* Cancel any currently running scans... */
7527                 if (iwl3945_scan_cancel_timeout(priv, 100))
7528                         IWL_WARNING("Could not cancel scan.\n");
7529                 else {
7530                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7531                                        "0x%04X\n", filter_flags);
7532                         priv->staging_rxon.filter_flags =
7533                                 cpu_to_le32(filter_flags);
7534                         iwl3945_commit_rxon(priv);
7535                 }
7536         }
7537         mutex_unlock(&priv->mutex);
7538
7539         return count;
7540 }
7541
7542 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7543                    store_filter_flags);
7544
7545 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7546
7547 static ssize_t show_measurement(struct device *d,
7548                                 struct device_attribute *attr, char *buf)
7549 {
7550         struct iwl3945_priv *priv = dev_get_drvdata(d);
7551         struct iwl3945_spectrum_notification measure_report;
7552         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7553         u8 *data = (u8 *) & measure_report;
7554         unsigned long flags;
7555
7556         spin_lock_irqsave(&priv->lock, flags);
7557         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7558                 spin_unlock_irqrestore(&priv->lock, flags);
7559                 return 0;
7560         }
7561         memcpy(&measure_report, &priv->measure_report, size);
7562         priv->measurement_status = 0;
7563         spin_unlock_irqrestore(&priv->lock, flags);
7564
7565         while (size && (PAGE_SIZE - len)) {
7566                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7567                                    PAGE_SIZE - len, 1);
7568                 len = strlen(buf);
7569                 if (PAGE_SIZE - len)
7570                         buf[len++] = '\n';
7571
7572                 ofs += 16;
7573                 size -= min(size, 16U);
7574         }
7575
7576         return len;
7577 }
7578
7579 static ssize_t store_measurement(struct device *d,
7580                                  struct device_attribute *attr,
7581                                  const char *buf, size_t count)
7582 {
7583         struct iwl3945_priv *priv = dev_get_drvdata(d);
7584         struct ieee80211_measurement_params params = {
7585                 .channel = le16_to_cpu(priv->active_rxon.channel),
7586                 .start_time = cpu_to_le64(priv->last_tsf),
7587                 .duration = cpu_to_le16(1),
7588         };
7589         u8 type = IWL_MEASURE_BASIC;
7590         u8 buffer[32];
7591         u8 channel;
7592
7593         if (count) {
7594                 char *p = buffer;
7595                 strncpy(buffer, buf, min(sizeof(buffer), count));
7596                 channel = simple_strtoul(p, NULL, 0);
7597                 if (channel)
7598                         params.channel = channel;
7599
7600                 p = buffer;
7601                 while (*p && *p != ' ')
7602                         p++;
7603                 if (*p)
7604                         type = simple_strtoul(p + 1, NULL, 0);
7605         }
7606
7607         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7608                        "channel %d (for '%s')\n", type, params.channel, buf);
7609         iwl3945_get_measurement(priv, &params, type);
7610
7611         return count;
7612 }
7613
7614 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7615                    show_measurement, store_measurement);
7616 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7617
7618 static ssize_t store_retry_rate(struct device *d,
7619                                 struct device_attribute *attr,
7620                                 const char *buf, size_t count)
7621 {
7622         struct iwl3945_priv *priv = dev_get_drvdata(d);
7623
7624         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7625         if (priv->retry_rate <= 0)
7626                 priv->retry_rate = 1;
7627
7628         return count;
7629 }
7630
7631 static ssize_t show_retry_rate(struct device *d,
7632                                struct device_attribute *attr, char *buf)
7633 {
7634         struct iwl3945_priv *priv = dev_get_drvdata(d);
7635         return sprintf(buf, "%d", priv->retry_rate);
7636 }
7637
7638 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7639                    store_retry_rate);
7640
7641 static ssize_t store_power_level(struct device *d,
7642                                  struct device_attribute *attr,
7643                                  const char *buf, size_t count)
7644 {
7645         struct iwl3945_priv *priv = dev_get_drvdata(d);
7646         int rc;
7647         int mode;
7648
7649         mode = simple_strtoul(buf, NULL, 0);
7650         mutex_lock(&priv->mutex);
7651
7652         if (!iwl3945_is_ready(priv)) {
7653                 rc = -EAGAIN;
7654                 goto out;
7655         }
7656
7657         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7658                 mode = IWL_POWER_AC;
7659         else
7660                 mode |= IWL_POWER_ENABLED;
7661
7662         if (mode != priv->power_mode) {
7663                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7664                 if (rc) {
7665                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7666                         goto out;
7667                 }
7668                 priv->power_mode = mode;
7669         }
7670
7671         rc = count;
7672
7673  out:
7674         mutex_unlock(&priv->mutex);
7675         return rc;
7676 }
7677
7678 #define MAX_WX_STRING 80
7679
7680 /* Values are in microsecond */
7681 static const s32 timeout_duration[] = {
7682         350000,
7683         250000,
7684         75000,
7685         37000,
7686         25000,
7687 };
7688 static const s32 period_duration[] = {
7689         400000,
7690         700000,
7691         1000000,
7692         1000000,
7693         1000000
7694 };
7695
7696 static ssize_t show_power_level(struct device *d,
7697                                 struct device_attribute *attr, char *buf)
7698 {
7699         struct iwl3945_priv *priv = dev_get_drvdata(d);
7700         int level = IWL_POWER_LEVEL(priv->power_mode);
7701         char *p = buf;
7702
7703         p += sprintf(p, "%d ", level);
7704         switch (level) {
7705         case IWL_POWER_MODE_CAM:
7706         case IWL_POWER_AC:
7707                 p += sprintf(p, "(AC)");
7708                 break;
7709         case IWL_POWER_BATTERY:
7710                 p += sprintf(p, "(BATTERY)");
7711                 break;
7712         default:
7713                 p += sprintf(p,
7714                              "(Timeout %dms, Period %dms)",
7715                              timeout_duration[level - 1] / 1000,
7716                              period_duration[level - 1] / 1000);
7717         }
7718
7719         if (!(priv->power_mode & IWL_POWER_ENABLED))
7720                 p += sprintf(p, " OFF\n");
7721         else
7722                 p += sprintf(p, " \n");
7723
7724         return (p - buf + 1);
7725
7726 }
7727
7728 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7729                    store_power_level);
7730
7731 static ssize_t show_channels(struct device *d,
7732                              struct device_attribute *attr, char *buf)
7733 {
7734         /* all this shit doesn't belong into sysfs anyway */
7735         return 0;
7736 }
7737
7738 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7739
7740 static ssize_t show_statistics(struct device *d,
7741                                struct device_attribute *attr, char *buf)
7742 {
7743         struct iwl3945_priv *priv = dev_get_drvdata(d);
7744         u32 size = sizeof(struct iwl3945_notif_statistics);
7745         u32 len = 0, ofs = 0;
7746         u8 *data = (u8 *) & priv->statistics;
7747         int rc = 0;
7748
7749         if (!iwl3945_is_alive(priv))
7750                 return -EAGAIN;
7751
7752         mutex_lock(&priv->mutex);
7753         rc = iwl3945_send_statistics_request(priv);
7754         mutex_unlock(&priv->mutex);
7755
7756         if (rc) {
7757                 len = sprintf(buf,
7758                               "Error sending statistics request: 0x%08X\n", rc);
7759                 return len;
7760         }
7761
7762         while (size && (PAGE_SIZE - len)) {
7763                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7764                                    PAGE_SIZE - len, 1);
7765                 len = strlen(buf);
7766                 if (PAGE_SIZE - len)
7767                         buf[len++] = '\n';
7768
7769                 ofs += 16;
7770                 size -= min(size, 16U);
7771         }
7772
7773         return len;
7774 }
7775
7776 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7777
7778 static ssize_t show_antenna(struct device *d,
7779                             struct device_attribute *attr, char *buf)
7780 {
7781         struct iwl3945_priv *priv = dev_get_drvdata(d);
7782
7783         if (!iwl3945_is_alive(priv))
7784                 return -EAGAIN;
7785
7786         return sprintf(buf, "%d\n", priv->antenna);
7787 }
7788
7789 static ssize_t store_antenna(struct device *d,
7790                              struct device_attribute *attr,
7791                              const char *buf, size_t count)
7792 {
7793         int ant;
7794         struct iwl3945_priv *priv = dev_get_drvdata(d);
7795
7796         if (count == 0)
7797                 return 0;
7798
7799         if (sscanf(buf, "%1i", &ant) != 1) {
7800                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7801                 return count;
7802         }
7803
7804         if ((ant >= 0) && (ant <= 2)) {
7805                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7806                 priv->antenna = (enum iwl3945_antenna)ant;
7807         } else
7808                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7809
7810
7811         return count;
7812 }
7813
7814 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7815
7816 static ssize_t show_status(struct device *d,
7817                            struct device_attribute *attr, char *buf)
7818 {
7819         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7820         if (!iwl3945_is_alive(priv))
7821                 return -EAGAIN;
7822         return sprintf(buf, "0x%08x\n", (int)priv->status);
7823 }
7824
7825 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7826
7827 static ssize_t dump_error_log(struct device *d,
7828                               struct device_attribute *attr,
7829                               const char *buf, size_t count)
7830 {
7831         char *p = (char *)buf;
7832
7833         if (p[0] == '1')
7834                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7835
7836         return strnlen(buf, count);
7837 }
7838
7839 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7840
7841 static ssize_t dump_event_log(struct device *d,
7842                               struct device_attribute *attr,
7843                               const char *buf, size_t count)
7844 {
7845         char *p = (char *)buf;
7846
7847         if (p[0] == '1')
7848                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7849
7850         return strnlen(buf, count);
7851 }
7852
7853 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7854
7855 /*****************************************************************************
7856  *
7857  * driver setup and teardown
7858  *
7859  *****************************************************************************/
7860
7861 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7862 {
7863         priv->workqueue = create_workqueue(DRV_NAME);
7864
7865         init_waitqueue_head(&priv->wait_command_queue);
7866
7867         INIT_WORK(&priv->up, iwl3945_bg_up);
7868         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7869         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7870         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7871         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7872         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7873         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7874         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7875         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
7876         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7877         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7878         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7879
7880         iwl3945_hw_setup_deferred_work(priv);
7881
7882         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7883                      iwl3945_irq_tasklet, (unsigned long)priv);
7884 }
7885
7886 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7887 {
7888         iwl3945_hw_cancel_deferred_work(priv);
7889
7890         cancel_delayed_work_sync(&priv->init_alive_start);
7891         cancel_delayed_work(&priv->scan_check);
7892         cancel_delayed_work(&priv->alive_start);
7893         cancel_delayed_work(&priv->post_associate);
7894         cancel_work_sync(&priv->beacon_update);
7895 }
7896
7897 static struct attribute *iwl3945_sysfs_entries[] = {
7898         &dev_attr_antenna.attr,
7899         &dev_attr_channels.attr,
7900         &dev_attr_dump_errors.attr,
7901         &dev_attr_dump_events.attr,
7902         &dev_attr_flags.attr,
7903         &dev_attr_filter_flags.attr,
7904 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7905         &dev_attr_measurement.attr,
7906 #endif
7907         &dev_attr_power_level.attr,
7908         &dev_attr_retry_rate.attr,
7909         &dev_attr_rf_kill.attr,
7910         &dev_attr_rs_window.attr,
7911         &dev_attr_statistics.attr,
7912         &dev_attr_status.attr,
7913         &dev_attr_temperature.attr,
7914         &dev_attr_tx_power.attr,
7915
7916         NULL
7917 };
7918
7919 static struct attribute_group iwl3945_attribute_group = {
7920         .name = NULL,           /* put in device directory */
7921         .attrs = iwl3945_sysfs_entries,
7922 };
7923
7924 static struct ieee80211_ops iwl3945_hw_ops = {
7925         .tx = iwl3945_mac_tx,
7926         .start = iwl3945_mac_start,
7927         .stop = iwl3945_mac_stop,
7928         .add_interface = iwl3945_mac_add_interface,
7929         .remove_interface = iwl3945_mac_remove_interface,
7930         .config = iwl3945_mac_config,
7931         .config_interface = iwl3945_mac_config_interface,
7932         .configure_filter = iwl3945_configure_filter,
7933         .set_key = iwl3945_mac_set_key,
7934         .get_stats = iwl3945_mac_get_stats,
7935         .get_tx_stats = iwl3945_mac_get_tx_stats,
7936         .conf_tx = iwl3945_mac_conf_tx,
7937         .get_tsf = iwl3945_mac_get_tsf,
7938         .reset_tsf = iwl3945_mac_reset_tsf,
7939         .beacon_update = iwl3945_mac_beacon_update,
7940         .hw_scan = iwl3945_mac_hw_scan
7941 };
7942
7943 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7944 {
7945         int err = 0;
7946         struct iwl3945_priv *priv;
7947         struct ieee80211_hw *hw;
7948         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7949         int i;
7950         unsigned long flags;
7951         DECLARE_MAC_BUF(mac);
7952
7953         /* Disabling hardware scan means that mac80211 will perform scans
7954          * "the hard way", rather than using device's scan. */
7955         if (iwl3945_param_disable_hw_scan) {
7956                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7957                 iwl3945_hw_ops.hw_scan = NULL;
7958         }
7959
7960         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7961             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7962                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7963                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7964                 err = -EINVAL;
7965                 goto out;
7966         }
7967
7968         /* mac80211 allocates memory for this device instance, including
7969          *   space for this driver's private structure */
7970         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7971         if (hw == NULL) {
7972                 IWL_ERROR("Can not allocate network device\n");
7973                 err = -ENOMEM;
7974                 goto out;
7975         }
7976         SET_IEEE80211_DEV(hw, &pdev->dev);
7977
7978         hw->rate_control_algorithm = "iwl-3945-rs";
7979
7980         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7981         priv = hw->priv;
7982         priv->hw = hw;
7983
7984         priv->pci_dev = pdev;
7985         priv->cfg = cfg;
7986
7987         /* Select antenna (may be helpful if only one antenna is connected) */
7988         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7989 #ifdef CONFIG_IWL3945_DEBUG
7990         iwl3945_debug_level = iwl3945_param_debug;
7991         atomic_set(&priv->restrict_refcnt, 0);
7992 #endif
7993         priv->retry_rate = 1;
7994
7995         priv->ibss_beacon = NULL;
7996
7997         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
7998          *   the range of signal quality values that we'll provide.
7999          * Negative values for level/noise indicate that we'll provide dBm.
8000          * For WE, at least, non-0 values here *enable* display of values
8001          *   in app (iwconfig). */
8002         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8003         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8004         hw->max_signal = 100;   /* link quality indication (%) */
8005
8006         /* Tell mac80211 our Tx characteristics */
8007         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8008
8009         /* 4 EDCA QOS priorities */
8010         hw->queues = 4;
8011
8012         spin_lock_init(&priv->lock);
8013         spin_lock_init(&priv->power_data.lock);
8014         spin_lock_init(&priv->sta_lock);
8015         spin_lock_init(&priv->hcmd_lock);
8016
8017         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8018                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8019
8020         INIT_LIST_HEAD(&priv->free_frames);
8021
8022         mutex_init(&priv->mutex);
8023         if (pci_enable_device(pdev)) {
8024                 err = -ENODEV;
8025                 goto out_ieee80211_free_hw;
8026         }
8027
8028         pci_set_master(pdev);
8029
8030         /* Clear the driver's (not device's) station table */
8031         iwl3945_clear_stations_table(priv);
8032
8033         priv->data_retry_limit = -1;
8034         priv->ieee_channels = NULL;
8035         priv->ieee_rates = NULL;
8036         priv->band = IEEE80211_BAND_2GHZ;
8037
8038         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8039         if (!err)
8040                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8041         if (err) {
8042                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8043                 goto out_pci_disable_device;
8044         }
8045
8046         pci_set_drvdata(pdev, priv);
8047         err = pci_request_regions(pdev, DRV_NAME);
8048         if (err)
8049                 goto out_pci_disable_device;
8050
8051         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8052          * PCI Tx retries from interfering with C3 CPU state */
8053         pci_write_config_byte(pdev, 0x41, 0x00);
8054
8055         priv->hw_base = pci_iomap(pdev, 0, 0);
8056         if (!priv->hw_base) {
8057                 err = -ENODEV;
8058                 goto out_pci_release_regions;
8059         }
8060
8061         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8062                         (unsigned long long) pci_resource_len(pdev, 0));
8063         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8064
8065         /* Initialize module parameter values here */
8066
8067         /* Disable radio (SW RF KILL) via parameter when loading driver */
8068         if (iwl3945_param_disable) {
8069                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8070                 IWL_DEBUG_INFO("Radio disabled.\n");
8071         }
8072
8073         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8074
8075         printk(KERN_INFO DRV_NAME
8076                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8077
8078         /* Device-specific setup */
8079         if (iwl3945_hw_set_hw_setting(priv)) {
8080                 IWL_ERROR("failed to set hw settings\n");
8081                 goto out_iounmap;
8082         }
8083
8084         if (iwl3945_param_qos_enable)
8085                 priv->qos_data.qos_enable = 1;
8086
8087         iwl3945_reset_qos(priv);
8088
8089         priv->qos_data.qos_active = 0;
8090         priv->qos_data.qos_cap.val = 0;
8091
8092         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8093         iwl3945_setup_deferred_work(priv);
8094         iwl3945_setup_rx_handlers(priv);
8095
8096         priv->rates_mask = IWL_RATES_MASK;
8097         /* If power management is turned on, default to AC mode */
8098         priv->power_mode = IWL_POWER_AC;
8099         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8100
8101         spin_lock_irqsave(&priv->lock, flags);
8102         iwl3945_disable_interrupts(priv);
8103         spin_unlock_irqrestore(&priv->lock, flags);
8104
8105         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8106         if (err) {
8107                 IWL_ERROR("failed to create sysfs device attributes\n");
8108                 goto out_release_irq;
8109         }
8110
8111         /* nic init */
8112         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8113                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8114
8115         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8116         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8117                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8118                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8119         if (err < 0) {
8120                 IWL_DEBUG_INFO("Failed to init the card\n");
8121                 goto out_remove_sysfs;
8122         }
8123         /* Read the EEPROM */
8124         err = iwl3945_eeprom_init(priv);
8125         if (err) {
8126                 IWL_ERROR("Unable to init EEPROM\n");
8127                 goto out_remove_sysfs;
8128         }
8129         /* MAC Address location in EEPROM same for 3945/4965 */
8130         get_eeprom_mac(priv, priv->mac_addr);
8131         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8132         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8133
8134         err = iwl3945_init_channel_map(priv);
8135         if (err) {
8136                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8137                 goto out_remove_sysfs;
8138         }
8139
8140         err = iwl3945_init_geos(priv);
8141         if (err) {
8142                 IWL_ERROR("initializing geos failed: %d\n", err);
8143                 goto out_free_channel_map;
8144         }
8145
8146         err = ieee80211_register_hw(priv->hw);
8147         if (err) {
8148                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8149                 goto out_free_geos;
8150         }
8151
8152         priv->hw->conf.beacon_int = 100;
8153         priv->mac80211_registered = 1;
8154         pci_save_state(pdev);
8155         pci_disable_device(pdev);
8156
8157         return 0;
8158
8159  out_free_geos:
8160         iwl3945_free_geos(priv);
8161  out_free_channel_map:
8162         iwl3945_free_channel_map(priv);
8163  out_remove_sysfs:
8164         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8165
8166  out_release_irq:
8167         destroy_workqueue(priv->workqueue);
8168         priv->workqueue = NULL;
8169         iwl3945_unset_hw_setting(priv);
8170
8171  out_iounmap:
8172         pci_iounmap(pdev, priv->hw_base);
8173  out_pci_release_regions:
8174         pci_release_regions(pdev);
8175  out_pci_disable_device:
8176         pci_disable_device(pdev);
8177         pci_set_drvdata(pdev, NULL);
8178  out_ieee80211_free_hw:
8179         ieee80211_free_hw(priv->hw);
8180  out:
8181         return err;
8182 }
8183
8184 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8185 {
8186         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8187         struct list_head *p, *q;
8188         int i;
8189         unsigned long flags;
8190
8191         if (!priv)
8192                 return;
8193
8194         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8195
8196         set_bit(STATUS_EXIT_PENDING, &priv->status);
8197
8198         iwl3945_down(priv);
8199
8200         /* make sure we flush any pending irq or
8201          * tasklet for the driver
8202          */
8203         spin_lock_irqsave(&priv->lock, flags);
8204         iwl3945_disable_interrupts(priv);
8205         spin_unlock_irqrestore(&priv->lock, flags);
8206
8207         iwl_synchronize_irq(priv);
8208
8209         /* Free MAC hash list for ADHOC */
8210         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8211                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8212                         list_del(p);
8213                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8214                 }
8215         }
8216
8217         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8218
8219         iwl3945_dealloc_ucode_pci(priv);
8220
8221         if (priv->rxq.bd)
8222                 iwl3945_rx_queue_free(priv, &priv->rxq);
8223         iwl3945_hw_txq_ctx_free(priv);
8224
8225         iwl3945_unset_hw_setting(priv);
8226         iwl3945_clear_stations_table(priv);
8227
8228         if (priv->mac80211_registered) {
8229                 ieee80211_unregister_hw(priv->hw);
8230         }
8231
8232         /*netif_stop_queue(dev); */
8233         flush_workqueue(priv->workqueue);
8234
8235         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8236          * priv->workqueue... so we can't take down the workqueue
8237          * until now... */
8238         destroy_workqueue(priv->workqueue);
8239         priv->workqueue = NULL;
8240
8241         pci_iounmap(pdev, priv->hw_base);
8242         pci_release_regions(pdev);
8243         pci_disable_device(pdev);
8244         pci_set_drvdata(pdev, NULL);
8245
8246         iwl3945_free_channel_map(priv);
8247         iwl3945_free_geos(priv);
8248
8249         if (priv->ibss_beacon)
8250                 dev_kfree_skb(priv->ibss_beacon);
8251
8252         ieee80211_free_hw(priv->hw);
8253 }
8254
8255 #ifdef CONFIG_PM
8256
8257 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8258 {
8259         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8260
8261         if (priv->is_open) {
8262                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8263                 iwl3945_mac_stop(priv->hw);
8264                 priv->is_open = 1;
8265         }
8266
8267         pci_set_power_state(pdev, PCI_D3hot);
8268
8269         return 0;
8270 }
8271
8272 static int iwl3945_pci_resume(struct pci_dev *pdev)
8273 {
8274         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8275
8276         pci_set_power_state(pdev, PCI_D0);
8277
8278         if (priv->is_open)
8279                 iwl3945_mac_start(priv->hw);
8280
8281         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8282         return 0;
8283 }
8284
8285 #endif /* CONFIG_PM */
8286
8287 /*****************************************************************************
8288  *
8289  * driver and module entry point
8290  *
8291  *****************************************************************************/
8292
8293 static struct pci_driver iwl3945_driver = {
8294         .name = DRV_NAME,
8295         .id_table = iwl3945_hw_card_ids,
8296         .probe = iwl3945_pci_probe,
8297         .remove = __devexit_p(iwl3945_pci_remove),
8298 #ifdef CONFIG_PM
8299         .suspend = iwl3945_pci_suspend,
8300         .resume = iwl3945_pci_resume,
8301 #endif
8302 };
8303
8304 static int __init iwl3945_init(void)
8305 {
8306
8307         int ret;
8308         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8309         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8310
8311         ret = iwl3945_rate_control_register();
8312         if (ret) {
8313                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8314                 return ret;
8315         }
8316
8317         ret = pci_register_driver(&iwl3945_driver);
8318         if (ret) {
8319                 IWL_ERROR("Unable to initialize PCI module\n");
8320                 goto error_register;
8321         }
8322 #ifdef CONFIG_IWL3945_DEBUG
8323         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8324         if (ret) {
8325                 IWL_ERROR("Unable to create driver sysfs file\n");
8326                 goto error_debug;
8327         }
8328 #endif
8329
8330         return ret;
8331
8332 #ifdef CONFIG_IWL3945_DEBUG
8333 error_debug:
8334         pci_unregister_driver(&iwl3945_driver);
8335 #endif
8336 error_register:
8337         iwl3945_rate_control_unregister();
8338         return ret;
8339 }
8340
8341 static void __exit iwl3945_exit(void)
8342 {
8343 #ifdef CONFIG_IWL3945_DEBUG
8344         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8345 #endif
8346         pci_unregister_driver(&iwl3945_driver);
8347         iwl3945_rate_control_unregister();
8348 }
8349
8350 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8351 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8352 module_param_named(disable, iwl3945_param_disable, int, 0444);
8353 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8354 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8355 MODULE_PARM_DESC(hwcrypto,
8356                  "using hardware crypto engine (default 0 [software])\n");
8357 module_param_named(debug, iwl3945_param_debug, int, 0444);
8358 MODULE_PARM_DESC(debug, "debug output mask");
8359 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8360 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8361
8362 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8363 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8364
8365 /* QoS */
8366 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8367 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8368
8369 module_exit(iwl3945_exit);
8370 module_init(iwl3945_init);