git.oblomov.eu Git - linux-2.6/blob - 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         if (priv->cfg->sku & IWL_SKU_G)
2231                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
2232         if (priv->cfg->sku & IWL_SKU_A)
2233                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
2234         set_bit(STATUS_SCANNING, &priv->status);
2235         priv->scan_start = jiffies;
2236         priv->scan_pass_start = priv->scan_start;
2237
2238         queue_work(priv->workqueue, &priv->request_scan);
2239
2240         return 0;
2241 }
2242
2243 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2244 {
2245         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2246
2247         if (hw_decrypt)
2248                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2249         else
2250                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2251
2252         return 0;
2253 }
2254
2255 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2256                                           enum ieee80211_band band)
2257 {
2258         if (band == IEEE80211_BAND_5GHZ) {
2259                 priv->staging_rxon.flags &=
2260                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2261                       | RXON_FLG_CCK_MSK);
2262                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2263         } else {
2264                 /* Copied from iwl3945_bg_post_associate() */
2265                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2266                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2267                 else
2268                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2269
2270                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2271                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2272
2273                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2274                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2275                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2276         }
2277 }
2278
2279 /*
2280  * initialize rxon structure with default values from eeprom
2281  */
2282 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2283 {
2284         const struct iwl3945_channel_info *ch_info;
2285
2286         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2287
2288         switch (priv->iw_mode) {
2289         case IEEE80211_IF_TYPE_AP:
2290                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2291                 break;
2292
2293         case IEEE80211_IF_TYPE_STA:
2294                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2295                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2296                 break;
2297
2298         case IEEE80211_IF_TYPE_IBSS:
2299                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2300                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2301                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2302                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2303                 break;
2304
2305         case IEEE80211_IF_TYPE_MNTR:
2306                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2307                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2308                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2309                 break;
2310         default:
2311                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
2312                 break;
2313         }
2314
2315 #if 0
2316         /* TODO:  Figure out when short_preamble would be set and cache from
2317          * that */
2318         if (!hw_to_local(priv->hw)->short_preamble)
2319                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2320         else
2321                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2322 #endif
2323
2324         ch_info = iwl3945_get_channel_info(priv, priv->band,
2325                                        le16_to_cpu(priv->staging_rxon.channel));
2326
2327         if (!ch_info)
2328                 ch_info = &priv->channel_info[0];
2329
2330         /*
2331          * in some case A channels are all non IBSS
2332          * in this case force B/G channel
2333          */
2334         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2335             !(is_channel_ibss(ch_info)))
2336                 ch_info = &priv->channel_info[0];
2337
2338         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2339         if (is_channel_a_band(ch_info))
2340                 priv->band = IEEE80211_BAND_5GHZ;
2341         else
2342                 priv->band = IEEE80211_BAND_2GHZ;
2343
2344         iwl3945_set_flags_for_phymode(priv, priv->band);
2345
2346         priv->staging_rxon.ofdm_basic_rates =
2347             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2348         priv->staging_rxon.cck_basic_rates =
2349             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2350 }
2351
2352 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2353 {
2354         if (mode == IEEE80211_IF_TYPE_IBSS) {
2355                 const struct iwl3945_channel_info *ch_info;
2356
2357                 ch_info = iwl3945_get_channel_info(priv,
2358                         priv->band,
2359                         le16_to_cpu(priv->staging_rxon.channel));
2360
2361                 if (!ch_info || !is_channel_ibss(ch_info)) {
2362                         IWL_ERROR("channel %d not IBSS channel\n",
2363                                   le16_to_cpu(priv->staging_rxon.channel));
2364                         return -EINVAL;
2365                 }
2366         }
2367
2368         priv->iw_mode = mode;
2369
2370         iwl3945_connection_init_rx_config(priv);
2371         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2372
2373         iwl3945_clear_stations_table(priv);
2374
2375         /* dont commit rxon if rf-kill is on*/
2376         if (!iwl3945_is_ready_rf(priv))
2377                 return -EAGAIN;
2378
2379         cancel_delayed_work(&priv->scan_check);
2380         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2381                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2382                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2383                 return -EAGAIN;
2384         }
2385
2386         iwl3945_commit_rxon(priv);
2387
2388         return 0;
2389 }
2390
2391 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2392                                       struct ieee80211_tx_control *ctl,
2393                                       struct iwl3945_cmd *cmd,
2394                                       struct sk_buff *skb_frag,
2395                                       int last_frag)
2396 {
2397         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2398
2399         switch (keyinfo->alg) {
2400         case ALG_CCMP:
2401                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2402                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2403                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2404                 break;
2405
2406         case ALG_TKIP:
2407 #if 0
2408                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2409
2410                 if (last_frag)
2411                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2412                                8);
2413                 else
2414                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2415 #endif
2416                 break;
2417
2418         case ALG_WEP:
2419                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2420                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2421
2422                 if (keyinfo->keylen == 13)
2423                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2424
2425                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2426
2427                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2428                              "with key %d\n", ctl->key_idx);
2429                 break;
2430
2431         default:
2432                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2433                 break;
2434         }
2435 }
2436
2437 /*
2438  * handle build REPLY_TX command notification.
2439  */
2440 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2441                                   struct iwl3945_cmd *cmd,
2442                                   struct ieee80211_tx_control *ctrl,
2443                                   struct ieee80211_hdr *hdr,
2444                                   int is_unicast, u8 std_id)
2445 {
2446         __le16 *qc;
2447         u16 fc = le16_to_cpu(hdr->frame_control);
2448         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2449
2450         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2451         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2452                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2453                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2454                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2455                 if (ieee80211_is_probe_response(fc) &&
2456                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2457                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2458         } else {
2459                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2460                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2461         }
2462
2463         cmd->cmd.tx.sta_id = std_id;
2464         if (ieee80211_get_morefrag(hdr))
2465                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2466
2467         qc = ieee80211_get_qos_ctrl(hdr);
2468         if (qc) {
2469                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2470                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2471         } else
2472                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2473
2474         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2475                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2476                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2477         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2478                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2479                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2480         }
2481
2482         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2483                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2484
2485         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2486         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2487                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2488                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2489                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2490                 else
2491                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2492         } else {
2493                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2494 #ifdef CONFIG_IWL3945_LEDS
2495                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2496 #endif
2497         }
2498
2499         cmd->cmd.tx.driver_txop = 0;
2500         cmd->cmd.tx.tx_flags = tx_flags;
2501         cmd->cmd.tx.next_frame_len = 0;
2502 }
2503
2504 /**
2505  * iwl3945_get_sta_id - Find station's index within station table
2506  */
2507 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2508 {
2509         int sta_id;
2510         u16 fc = le16_to_cpu(hdr->frame_control);
2511
2512         /* If this frame is broadcast or management, use broadcast station id */
2513         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2514             is_multicast_ether_addr(hdr->addr1))
2515                 return priv->hw_setting.bcast_sta_id;
2516
2517         switch (priv->iw_mode) {
2518
2519         /* If we are a client station in a BSS network, use the special
2520          * AP station entry (that's the only station we communicate with) */
2521         case IEEE80211_IF_TYPE_STA:
2522                 return IWL_AP_ID;
2523
2524         /* If we are an AP, then find the station, or use BCAST */
2525         case IEEE80211_IF_TYPE_AP:
2526                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2527                 if (sta_id != IWL_INVALID_STATION)
2528                         return sta_id;
2529                 return priv->hw_setting.bcast_sta_id;
2530
2531         /* If this frame is going out to an IBSS network, find the station,
2532          * or create a new station table entry */
2533         case IEEE80211_IF_TYPE_IBSS: {
2534                 DECLARE_MAC_BUF(mac);
2535
2536                 /* Create new station table entry */
2537                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2538                 if (sta_id != IWL_INVALID_STATION)
2539                         return sta_id;
2540
2541                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2542
2543                 if (sta_id != IWL_INVALID_STATION)
2544                         return sta_id;
2545
2546                 IWL_DEBUG_DROP("Station %s not in station map. "
2547                                "Defaulting to broadcast...\n",
2548                                print_mac(mac, hdr->addr1));
2549                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2550                 return priv->hw_setting.bcast_sta_id;
2551         }
2552         default:
2553                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2554                 return priv->hw_setting.bcast_sta_id;
2555         }
2556 }
2557
2558 /*
2559  * start REPLY_TX command process
2560  */
2561 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2562                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2563 {
2564         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2565         struct iwl3945_tfd_frame *tfd;
2566         u32 *control_flags;
2567         int txq_id = ctl->queue;
2568         struct iwl3945_tx_queue *txq = NULL;
2569         struct iwl3945_queue *q = NULL;
2570         dma_addr_t phys_addr;
2571         dma_addr_t txcmd_phys;
2572         struct iwl3945_cmd *out_cmd = NULL;
2573         u16 len, idx, len_org;
2574         u8 id, hdr_len, unicast;
2575         u8 sta_id;
2576         u16 seq_number = 0;
2577         u16 fc;
2578         __le16 *qc;
2579         u8 wait_write_ptr = 0;
2580         unsigned long flags;
2581         int rc;
2582
2583         spin_lock_irqsave(&priv->lock, flags);
2584         if (iwl3945_is_rfkill(priv)) {
2585                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2586                 goto drop_unlock;
2587         }
2588
2589         if (!priv->vif) {
2590                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2591                 goto drop_unlock;
2592         }
2593
2594         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2595                 IWL_ERROR("ERROR: No TX rate available.\n");
2596                 goto drop_unlock;
2597         }
2598
2599         unicast = !is_multicast_ether_addr(hdr->addr1);
2600         id = 0;
2601
2602         fc = le16_to_cpu(hdr->frame_control);
2603
2604 #ifdef CONFIG_IWL3945_DEBUG
2605         if (ieee80211_is_auth(fc))
2606                 IWL_DEBUG_TX("Sending AUTH frame\n");
2607         else if (ieee80211_is_assoc_request(fc))
2608                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2609         else if (ieee80211_is_reassoc_request(fc))
2610                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2611 #endif
2612
2613         /* drop all data frame if we are not associated */
2614         if ((!iwl3945_is_associated(priv) ||
2615              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id)) &&
2616             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2617                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2618                 goto drop_unlock;
2619         }
2620
2621         spin_unlock_irqrestore(&priv->lock, flags);
2622
2623         hdr_len = ieee80211_get_hdrlen(fc);
2624
2625         /* Find (or create) index into station table for destination station */
2626         sta_id = iwl3945_get_sta_id(priv, hdr);
2627         if (sta_id == IWL_INVALID_STATION) {
2628                 DECLARE_MAC_BUF(mac);
2629
2630                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2631                                print_mac(mac, hdr->addr1));
2632                 goto drop;
2633         }
2634
2635         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2636
2637         qc = ieee80211_get_qos_ctrl(hdr);
2638         if (qc) {
2639                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2640                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2641                                 IEEE80211_SCTL_SEQ;
2642                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2643                         (hdr->seq_ctrl &
2644                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2645                 seq_number += 0x10;
2646         }
2647
2648         /* Descriptor for chosen Tx queue */
2649         txq = &priv->txq[txq_id];
2650         q = &txq->q;
2651
2652         spin_lock_irqsave(&priv->lock, flags);
2653
2654         /* Set up first empty TFD within this queue's circular TFD buffer */
2655         tfd = &txq->bd[q->write_ptr];
2656         memset(tfd, 0, sizeof(*tfd));
2657         control_flags = (u32 *) tfd;
2658         idx = get_cmd_index(q, q->write_ptr, 0);
2659
2660         /* Set up driver data for this TFD */
2661         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2662         txq->txb[q->write_ptr].skb[0] = skb;
2663         memcpy(&(txq->txb[q->write_ptr].status.control),
2664                ctl, sizeof(struct ieee80211_tx_control));
2665
2666         /* Init first empty entry in queue's array of Tx/cmd buffers */
2667         out_cmd = &txq->cmd[idx];
2668         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2669         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2670
2671         /*
2672          * Set up the Tx-command (not MAC!) header.
2673          * Store the chosen Tx queue and TFD index within the sequence field;
2674          * after Tx, uCode's Tx response will return this value so driver can
2675          * locate the frame within the tx queue and do post-tx processing.
2676          */
2677         out_cmd->hdr.cmd = REPLY_TX;
2678         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2679                                 INDEX_TO_SEQ(q->write_ptr)));
2680
2681         /* Copy MAC header from skb into command buffer */
2682         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2683
2684         /*
2685          * Use the first empty entry in this queue's command buffer array
2686          * to contain the Tx command and MAC header concatenated together
2687          * (payload data will be in another buffer).
2688          * Size of this varies, due to varying MAC header length.
2689          * If end is not dword aligned, we'll have 2 extra bytes at the end
2690          * of the MAC header (device reads on dword boundaries).
2691          * We'll tell device about this padding later.
2692          */
2693         len = priv->hw_setting.tx_cmd_len +
2694                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2695
2696         len_org = len;
2697         len = (len + 3) & ~3;
2698
2699         if (len_org != len)
2700                 len_org = 1;
2701         else
2702                 len_org = 0;
2703
2704         /* Physical address of this Tx command's header (not MAC header!),
2705          * within command buffer array. */
2706         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2707                      offsetof(struct iwl3945_cmd, hdr);
2708
2709         /* Add buffer containing Tx command and MAC(!) header to TFD's
2710          * first entry */
2711         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2712
2713         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2714                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2715
2716         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2717          * if any (802.11 null frames have no payload). */
2718         len = skb->len - hdr_len;
2719         if (len) {
2720                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2721                                            len, PCI_DMA_TODEVICE);
2722                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2723         }
2724
2725         if (!len)
2726                 /* If there is no payload, then we use only one Tx buffer */
2727                 *control_flags = TFD_CTL_COUNT_SET(1);
2728         else
2729                 /* Else use 2 buffers.
2730                  * Tell 3945 about any padding after MAC header */
2731                 *control_flags = TFD_CTL_COUNT_SET(2) |
2732                         TFD_CTL_PAD_SET(U32_PAD(len));
2733
2734         /* Total # bytes to be transmitted */
2735         len = (u16)skb->len;
2736         out_cmd->cmd.tx.len = cpu_to_le16(len);
2737
2738         /* TODO need this for burst mode later on */
2739         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2740
2741         /* set is_hcca to 0; it probably will never be implemented */
2742         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2743
2744         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2745         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2746
2747         if (!ieee80211_get_morefrag(hdr)) {
2748                 txq->need_update = 1;
2749                 if (qc) {
2750                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2751                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2752                 }
2753         } else {
2754                 wait_write_ptr = 1;
2755                 txq->need_update = 0;
2756         }
2757
2758         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2759                            sizeof(out_cmd->cmd.tx));
2760
2761         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2762                            ieee80211_get_hdrlen(fc));
2763
2764         /* Tell device the write index *just past* this latest filled TFD */
2765         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2766         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2767         spin_unlock_irqrestore(&priv->lock, flags);
2768
2769         if (rc)
2770                 return rc;
2771
2772         if ((iwl3945_queue_space(q) < q->high_mark)
2773             && priv->mac80211_registered) {
2774                 if (wait_write_ptr) {
2775                         spin_lock_irqsave(&priv->lock, flags);
2776                         txq->need_update = 1;
2777                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2778                         spin_unlock_irqrestore(&priv->lock, flags);
2779                 }
2780
2781                 ieee80211_stop_queue(priv->hw, ctl->queue);
2782         }
2783
2784         return 0;
2785
2786 drop_unlock:
2787         spin_unlock_irqrestore(&priv->lock, flags);
2788 drop:
2789         return -1;
2790 }
2791
2792 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2793 {
2794         const struct ieee80211_supported_band *sband = NULL;
2795         struct ieee80211_rate *rate;
2796         int i;
2797
2798         sband = iwl3945_get_band(priv, priv->band);
2799         if (!sband) {
2800                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2801                 return;
2802         }
2803
2804         priv->active_rate = 0;
2805         priv->active_rate_basic = 0;
2806
2807         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2808                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2809
2810         for (i = 0; i < sband->n_bitrates; i++) {
2811                 rate = &sband->bitrates[i];
2812                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2813                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2814                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2815                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2816                         priv->active_rate |= (1 << rate->hw_value);
2817                 }
2818         }
2819
2820         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2821                        priv->active_rate, priv->active_rate_basic);
2822
2823         /*
2824          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2825          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2826          * OFDM
2827          */
2828         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2829                 priv->staging_rxon.cck_basic_rates =
2830                     ((priv->active_rate_basic &
2831                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2832         else
2833                 priv->staging_rxon.cck_basic_rates =
2834                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2835
2836         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2837                 priv->staging_rxon.ofdm_basic_rates =
2838                     ((priv->active_rate_basic &
2839                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2840                       IWL_FIRST_OFDM_RATE) & 0xFF;
2841         else
2842                 priv->staging_rxon.ofdm_basic_rates =
2843                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2844 }
2845
2846 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2847 {
2848         unsigned long flags;
2849
2850         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2851                 return;
2852
2853         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2854                           disable_radio ? "OFF" : "ON");
2855
2856         if (disable_radio) {
2857                 iwl3945_scan_cancel(priv);
2858                 /* FIXME: This is a workaround for AP */
2859                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2860                         spin_lock_irqsave(&priv->lock, flags);
2861                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2862                                     CSR_UCODE_SW_BIT_RFKILL);
2863                         spin_unlock_irqrestore(&priv->lock, flags);
2864                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2865                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2866                 }
2867                 return;
2868         }
2869
2870         spin_lock_irqsave(&priv->lock, flags);
2871         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2872
2873         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2874         spin_unlock_irqrestore(&priv->lock, flags);
2875
2876         /* wake up ucode */
2877         msleep(10);
2878
2879         spin_lock_irqsave(&priv->lock, flags);
2880         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2881         if (!iwl3945_grab_nic_access(priv))
2882                 iwl3945_release_nic_access(priv);
2883         spin_unlock_irqrestore(&priv->lock, flags);
2884
2885         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2886                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2887                                   "disabled by HW switch\n");
2888                 return;
2889         }
2890
2891         queue_work(priv->workqueue, &priv->restart);
2892         return;
2893 }
2894
2895 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2896                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2897 {
2898         u16 fc =
2899             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2900
2901         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2902                 return;
2903
2904         if (!(fc & IEEE80211_FCTL_PROTECTED))
2905                 return;
2906
2907         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2908         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2909         case RX_RES_STATUS_SEC_TYPE_TKIP:
2910                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2911                     RX_RES_STATUS_BAD_ICV_MIC)
2912                         stats->flag |= RX_FLAG_MMIC_ERROR;
2913         case RX_RES_STATUS_SEC_TYPE_WEP:
2914         case RX_RES_STATUS_SEC_TYPE_CCMP:
2915                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2916                     RX_RES_STATUS_DECRYPT_OK) {
2917                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2918                         stats->flag |= RX_FLAG_DECRYPTED;
2919                 }
2920                 break;
2921
2922         default:
2923                 break;
2924         }
2925 }
2926
2927 #define IWL_PACKET_RETRY_TIME HZ
2928
2929 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2930 {
2931         u16 sc = le16_to_cpu(header->seq_ctrl);
2932         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2933         u16 frag = sc & IEEE80211_SCTL_FRAG;
2934         u16 *last_seq, *last_frag;
2935         unsigned long *last_time;
2936
2937         switch (priv->iw_mode) {
2938         case IEEE80211_IF_TYPE_IBSS:{
2939                 struct list_head *p;
2940                 struct iwl3945_ibss_seq *entry = NULL;
2941                 u8 *mac = header->addr2;
2942                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2943
2944                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2945                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
2946                         if (!compare_ether_addr(entry->mac, mac))
2947                                 break;
2948                 }
2949                 if (p == &priv->ibss_mac_hash[index]) {
2950                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2951                         if (!entry) {
2952                                 IWL_ERROR("Cannot malloc new mac entry\n");
2953                                 return 0;
2954                         }
2955                         memcpy(entry->mac, mac, ETH_ALEN);
2956                         entry->seq_num = seq;
2957                         entry->frag_num = frag;
2958                         entry->packet_time = jiffies;
2959                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2960                         return 0;
2961                 }
2962                 last_seq = &entry->seq_num;
2963                 last_frag = &entry->frag_num;
2964                 last_time = &entry->packet_time;
2965                 break;
2966         }
2967         case IEEE80211_IF_TYPE_STA:
2968                 last_seq = &priv->last_seq_num;
2969                 last_frag = &priv->last_frag_num;
2970                 last_time = &priv->last_packet_time;
2971                 break;
2972         default:
2973                 return 0;
2974         }
2975         if ((*last_seq == seq) &&
2976             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2977                 if (*last_frag == frag)
2978                         goto drop;
2979                 if (*last_frag + 1 != frag)
2980                         /* out-of-order fragment */
2981                         goto drop;
2982         } else
2983                 *last_seq = seq;
2984
2985         *last_frag = frag;
2986         *last_time = jiffies;
2987         return 0;
2988
2989  drop:
2990         return 1;
2991 }
2992
2993 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2994
2995 #include "iwl-spectrum.h"
2996
2997 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2998 #define BEACON_TIME_MASK_HIGH   0xFF000000
2999 #define TIME_UNIT               1024
3000
3001 /*
3002  * extended beacon time format
3003  * time in usec will be changed into a 32-bit value in 8:24 format
3004  * the high 1 byte is the beacon counts
3005  * the lower 3 bytes is the time in usec within one beacon interval
3006  */
3007
3008 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3009 {
3010         u32 quot;
3011         u32 rem;
3012         u32 interval = beacon_interval * 1024;
3013
3014         if (!interval || !usec)
3015                 return 0;
3016
3017         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3018         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3019
3020         return (quot << 24) + rem;
3021 }
3022
3023 /* base is usually what we get from ucode with each received frame,
3024  * the same as HW timer counter counting down
3025  */
3026
3027 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3028 {
3029         u32 base_low = base & BEACON_TIME_MASK_LOW;
3030         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3031         u32 interval = beacon_interval * TIME_UNIT;
3032         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3033             (addon & BEACON_TIME_MASK_HIGH);
3034
3035         if (base_low > addon_low)
3036                 res += base_low - addon_low;
3037         else if (base_low < addon_low) {
3038                 res += interval + base_low - addon_low;
3039                 res += (1 << 24);
3040         } else
3041                 res += (1 << 24);
3042
3043         return cpu_to_le32(res);
3044 }
3045
3046 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3047                                struct ieee80211_measurement_params *params,
3048                                u8 type)
3049 {
3050         struct iwl3945_spectrum_cmd spectrum;
3051         struct iwl3945_rx_packet *res;
3052         struct iwl3945_host_cmd cmd = {
3053                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3054                 .data = (void *)&spectrum,
3055                 .meta.flags = CMD_WANT_SKB,
3056         };
3057         u32 add_time = le64_to_cpu(params->start_time);
3058         int rc;
3059         int spectrum_resp_status;
3060         int duration = le16_to_cpu(params->duration);
3061
3062         if (iwl3945_is_associated(priv))
3063                 add_time =
3064                     iwl3945_usecs_to_beacons(
3065                         le64_to_cpu(params->start_time) - priv->last_tsf,
3066                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3067
3068         memset(&spectrum, 0, sizeof(spectrum));
3069
3070         spectrum.channel_count = cpu_to_le16(1);
3071         spectrum.flags =
3072             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3073         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3074         cmd.len = sizeof(spectrum);
3075         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3076
3077         if (iwl3945_is_associated(priv))
3078                 spectrum.start_time =
3079                     iwl3945_add_beacon_time(priv->last_beacon_time,
3080                                 add_time,
3081                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3082         else
3083                 spectrum.start_time = 0;
3084
3085         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3086         spectrum.channels[0].channel = params->channel;
3087         spectrum.channels[0].type = type;
3088         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3089                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3090                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3091
3092         rc = iwl3945_send_cmd_sync(priv, &cmd);
3093         if (rc)
3094                 return rc;
3095
3096         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3097         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3098                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3099                 rc = -EIO;
3100         }
3101
3102         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3103         switch (spectrum_resp_status) {
3104         case 0:         /* Command will be handled */
3105                 if (res->u.spectrum.id != 0xff) {
3106                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3107                                                 res->u.spectrum.id);
3108                         priv->measurement_status &= ~MEASUREMENT_READY;
3109                 }
3110                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3111                 rc = 0;
3112                 break;
3113
3114         case 1:         /* Command will not be handled */
3115                 rc = -EAGAIN;
3116                 break;
3117         }
3118
3119         dev_kfree_skb_any(cmd.meta.u.skb);
3120
3121         return rc;
3122 }
3123 #endif
3124
3125 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3126                                struct iwl3945_rx_mem_buffer *rxb)
3127 {
3128         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3129         struct iwl3945_alive_resp *palive;
3130         struct delayed_work *pwork;
3131
3132         palive = &pkt->u.alive_frame;
3133
3134         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3135                        "0x%01X 0x%01X\n",
3136                        palive->is_valid, palive->ver_type,
3137                        palive->ver_subtype);
3138
3139         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3140                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3141                 memcpy(&priv->card_alive_init,
3142                        &pkt->u.alive_frame,
3143                        sizeof(struct iwl3945_init_alive_resp));
3144                 pwork = &priv->init_alive_start;
3145         } else {
3146                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3147                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3148                        sizeof(struct iwl3945_alive_resp));
3149                 pwork = &priv->alive_start;
3150                 iwl3945_disable_events(priv);
3151         }
3152
3153         /* We delay the ALIVE response by 5ms to
3154          * give the HW RF Kill time to activate... */
3155         if (palive->is_valid == UCODE_VALID_OK)
3156                 queue_delayed_work(priv->workqueue, pwork,
3157                                    msecs_to_jiffies(5));
3158         else
3159                 IWL_WARNING("uCode did not respond OK.\n");
3160 }
3161
3162 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3163                                  struct iwl3945_rx_mem_buffer *rxb)
3164 {
3165         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3166
3167         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3168         return;
3169 }
3170
3171 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3172                                struct iwl3945_rx_mem_buffer *rxb)
3173 {
3174         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3175
3176         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3177                 "seq 0x%04X ser 0x%08X\n",
3178                 le32_to_cpu(pkt->u.err_resp.error_type),
3179                 get_cmd_string(pkt->u.err_resp.cmd_id),
3180                 pkt->u.err_resp.cmd_id,
3181                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3182                 le32_to_cpu(pkt->u.err_resp.error_info));
3183 }
3184
3185 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3186
3187 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3188 {
3189         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3190         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3191         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3192         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3193                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3194         rxon->channel = csa->channel;
3195         priv->staging_rxon.channel = csa->channel;
3196 }
3197
3198 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3199                                           struct iwl3945_rx_mem_buffer *rxb)
3200 {
3201 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3202         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3203         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3204
3205         if (!report->state) {
3206                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3207                           "Spectrum Measure Notification: Start\n");
3208                 return;
3209         }
3210
3211         memcpy(&priv->measure_report, report, sizeof(*report));
3212         priv->measurement_status |= MEASUREMENT_READY;
3213 #endif
3214 }
3215
3216 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3217                                   struct iwl3945_rx_mem_buffer *rxb)
3218 {
3219 #ifdef CONFIG_IWL3945_DEBUG
3220         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3221         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3222         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3223                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3224 #endif
3225 }
3226
3227 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3228                                              struct iwl3945_rx_mem_buffer *rxb)
3229 {
3230         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3231         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3232                         "notification for %s:\n",
3233                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3234         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3235 }
3236
3237 static void iwl3945_bg_beacon_update(struct work_struct *work)
3238 {
3239         struct iwl3945_priv *priv =
3240                 container_of(work, struct iwl3945_priv, beacon_update);
3241         struct sk_buff *beacon;
3242
3243         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3244         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3245
3246         if (!beacon) {
3247                 IWL_ERROR("update beacon failed\n");
3248                 return;
3249         }
3250
3251         mutex_lock(&priv->mutex);
3252         /* new beacon skb is allocated every time; dispose previous.*/
3253         if (priv->ibss_beacon)
3254                 dev_kfree_skb(priv->ibss_beacon);
3255
3256         priv->ibss_beacon = beacon;
3257         mutex_unlock(&priv->mutex);
3258
3259         iwl3945_send_beacon_cmd(priv);
3260 }
3261
3262 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3263                                 struct iwl3945_rx_mem_buffer *rxb)
3264 {
3265 #ifdef CONFIG_IWL3945_DEBUG
3266         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3267         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3268         u8 rate = beacon->beacon_notify_hdr.rate;
3269
3270         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3271                 "tsf %d %d rate %d\n",
3272                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3273                 beacon->beacon_notify_hdr.failure_frame,
3274                 le32_to_cpu(beacon->ibss_mgr_status),
3275                 le32_to_cpu(beacon->high_tsf),
3276                 le32_to_cpu(beacon->low_tsf), rate);
3277 #endif
3278
3279         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3280             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3281                 queue_work(priv->workqueue, &priv->beacon_update);
3282 }
3283
3284 /* Service response to REPLY_SCAN_CMD (0x80) */
3285 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3286                               struct iwl3945_rx_mem_buffer *rxb)
3287 {
3288 #ifdef CONFIG_IWL3945_DEBUG
3289         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3290         struct iwl3945_scanreq_notification *notif =
3291             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3292
3293         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3294 #endif
3295 }
3296
3297 /* Service SCAN_START_NOTIFICATION (0x82) */
3298 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3299                                     struct iwl3945_rx_mem_buffer *rxb)
3300 {
3301         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3302         struct iwl3945_scanstart_notification *notif =
3303             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3304         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3305         IWL_DEBUG_SCAN("Scan start: "
3306                        "%d [802.11%s] "
3307                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3308                        notif->channel,
3309                        notif->band ? "bg" : "a",
3310                        notif->tsf_high,
3311                        notif->tsf_low, notif->status, notif->beacon_timer);
3312 }
3313
3314 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3315 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3316                                       struct iwl3945_rx_mem_buffer *rxb)
3317 {
3318         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3319         struct iwl3945_scanresults_notification *notif =
3320             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3321
3322         IWL_DEBUG_SCAN("Scan ch.res: "
3323                        "%d [802.11%s] "
3324                        "(TSF: 0x%08X:%08X) - %d "
3325                        "elapsed=%lu usec (%dms since last)\n",
3326                        notif->channel,
3327                        notif->band ? "bg" : "a",
3328                        le32_to_cpu(notif->tsf_high),
3329                        le32_to_cpu(notif->tsf_low),
3330                        le32_to_cpu(notif->statistics[0]),
3331                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3332                        jiffies_to_msecs(elapsed_jiffies
3333                                         (priv->last_scan_jiffies, jiffies)));
3334
3335         priv->last_scan_jiffies = jiffies;
3336         priv->next_scan_jiffies = 0;
3337 }
3338
3339 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3340 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3341                                        struct iwl3945_rx_mem_buffer *rxb)
3342 {
3343         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3344         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3345
3346         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3347                        scan_notif->scanned_channels,
3348                        scan_notif->tsf_low,
3349                        scan_notif->tsf_high, scan_notif->status);
3350
3351         /* The HW is no longer scanning */
3352         clear_bit(STATUS_SCAN_HW, &priv->status);
3353
3354         /* The scan completion notification came in, so kill that timer... */
3355         cancel_delayed_work(&priv->scan_check);
3356
3357         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3358                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
3359                                                         "2.4" : "5.2",
3360                        jiffies_to_msecs(elapsed_jiffies
3361                                         (priv->scan_pass_start, jiffies)));
3362
3363         /* Remove this scanned band from the list of pending
3364          * bands to scan, band G precedes A in order of scanning
3365          * as seen in iwl3945_bg_request_scan */
3366         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
3367                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
3368         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
3369                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
3370
3371         /* If a request to abort was given, or the scan did not succeed
3372          * then we reset the scan state machine and terminate,
3373          * re-queuing another scan if one has been requested */
3374         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3375                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3376                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3377         } else {
3378                 /* If there are more bands on this scan pass reschedule */
3379                 if (priv->scan_bands > 0)
3380                         goto reschedule;
3381         }
3382
3383         priv->last_scan_jiffies = jiffies;
3384         priv->next_scan_jiffies = 0;
3385         IWL_DEBUG_INFO("Setting scan to off\n");
3386
3387         clear_bit(STATUS_SCANNING, &priv->status);
3388
3389         IWL_DEBUG_INFO("Scan took %dms\n",
3390                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3391
3392         queue_work(priv->workqueue, &priv->scan_completed);
3393
3394         return;
3395
3396 reschedule:
3397         priv->scan_pass_start = jiffies;
3398         queue_work(priv->workqueue, &priv->request_scan);
3399 }
3400
3401 /* Handle notification from uCode that card's power state is changing
3402  * due to software, hardware, or critical temperature RFKILL */
3403 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3404                                     struct iwl3945_rx_mem_buffer *rxb)
3405 {
3406         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3407         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3408         unsigned long status = priv->status;
3409
3410         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3411                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3412                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3413
3414         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3415                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3416
3417         if (flags & HW_CARD_DISABLED)
3418                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3419         else
3420                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3421
3422
3423         if (flags & SW_CARD_DISABLED)
3424                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3425         else
3426                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3427
3428         iwl3945_scan_cancel(priv);
3429
3430         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3431              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3432             (test_bit(STATUS_RF_KILL_SW, &status) !=
3433              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3434                 queue_work(priv->workqueue, &priv->rf_kill);
3435         else
3436                 wake_up_interruptible(&priv->wait_command_queue);
3437 }
3438
3439 /**
3440  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3441  *
3442  * Setup the RX handlers for each of the reply types sent from the uCode
3443  * to the host.
3444  *
3445  * This function chains into the hardware specific files for them to setup
3446  * any hardware specific handlers as well.
3447  */
3448 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3449 {
3450         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3451         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3452         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3453         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3454         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3455             iwl3945_rx_spectrum_measure_notif;
3456         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3457         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3458             iwl3945_rx_pm_debug_statistics_notif;
3459         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3460
3461         /*
3462          * The same handler is used for both the REPLY to a discrete
3463          * statistics request from the host as well as for the periodic
3464          * statistics notifications (after received beacons) from the uCode.
3465          */
3466         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3467         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3468
3469         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3470         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3471         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3472             iwl3945_rx_scan_results_notif;
3473         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3474             iwl3945_rx_scan_complete_notif;
3475         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3476
3477         /* Set up hardware specific Rx handlers */
3478         iwl3945_hw_rx_handler_setup(priv);
3479 }
3480
3481 /**
3482  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3483  * When FW advances 'R' index, all entries between old and new 'R' index
3484  * need to be reclaimed.
3485  */
3486 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3487                                       int txq_id, int index)
3488 {
3489         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3490         struct iwl3945_queue *q = &txq->q;
3491         int nfreed = 0;
3492
3493         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3494                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3495                           "is out of range [0-%d] %d %d.\n", txq_id,
3496                           index, q->n_bd, q->write_ptr, q->read_ptr);
3497                 return;
3498         }
3499
3500         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3501                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3502                 if (nfreed > 1) {
3503                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3504                                         q->write_ptr, q->read_ptr);
3505                         queue_work(priv->workqueue, &priv->restart);
3506                         break;
3507                 }
3508                 nfreed++;
3509         }
3510 }
3511
3512
3513 /**
3514  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3515  * @rxb: Rx buffer to reclaim
3516  *
3517  * If an Rx buffer has an async callback associated with it the callback
3518  * will be executed.  The attached skb (if present) will only be freed
3519  * if the callback returns 1
3520  */
3521 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3522                                 struct iwl3945_rx_mem_buffer *rxb)
3523 {
3524         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3525         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3526         int txq_id = SEQ_TO_QUEUE(sequence);
3527         int index = SEQ_TO_INDEX(sequence);
3528         int huge = sequence & SEQ_HUGE_FRAME;
3529         int cmd_index;
3530         struct iwl3945_cmd *cmd;
3531
3532         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3533
3534         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3535         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3536
3537         /* Input error checking is done when commands are added to queue. */
3538         if (cmd->meta.flags & CMD_WANT_SKB) {
3539                 cmd->meta.source->u.skb = rxb->skb;
3540                 rxb->skb = NULL;
3541         } else if (cmd->meta.u.callback &&
3542                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3543                 rxb->skb = NULL;
3544
3545         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3546
3547         if (!(cmd->meta.flags & CMD_ASYNC)) {
3548                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3549                 wake_up_interruptible(&priv->wait_command_queue);
3550         }
3551 }
3552
3553 /************************** RX-FUNCTIONS ****************************/
3554 /*
3555  * Rx theory of operation
3556  *
3557  * The host allocates 32 DMA target addresses and passes the host address
3558  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3559  * 0 to 31
3560  *
3561  * Rx Queue Indexes
3562  * The host/firmware share two index registers for managing the Rx buffers.
3563  *
3564  * The READ index maps to the first position that the firmware may be writing
3565  * to -- the driver can read up to (but not including) this position and get
3566  * good data.
3567  * The READ index is managed by the firmware once the card is enabled.
3568  *
3569  * The WRITE index maps to the last position the driver has read from -- the
3570  * position preceding WRITE is the last slot the firmware can place a packet.
3571  *
3572  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3573  * WRITE = READ.
3574  *
3575  * During initialization, the host sets up the READ queue position to the first
3576  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3577  *
3578  * When the firmware places a packet in a buffer, it will advance the READ index
3579  * and fire the RX interrupt.  The driver can then query the READ index and
3580  * process as many packets as possible, moving the WRITE index forward as it
3581  * resets the Rx queue buffers with new memory.
3582  *
3583  * The management in the driver is as follows:
3584  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3585  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3586  *   to replenish the iwl->rxq->rx_free.
3587  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3588  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3589  *   'processed' and 'read' driver indexes as well)
3590  * + A received packet is processed and handed to the kernel network stack,
3591  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3592  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3593  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3594  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3595  *   were enough free buffers and RX_STALLED is set it is cleared.
3596  *
3597  *
3598  * Driver sequence:
3599  *
3600  * iwl3945_rx_queue_alloc()   Allocates rx_free
3601  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3602  *                            iwl3945_rx_queue_restock
3603  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3604  *                            queue, updates firmware pointers, and updates
3605  *                            the WRITE index.  If insufficient rx_free buffers
3606  *                            are available, schedules iwl3945_rx_replenish
3607  *
3608  * -- enable interrupts --
3609  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3610  *                            READ INDEX, detaching the SKB from the pool.
3611  *                            Moves the packet buffer from queue to rx_used.
3612  *                            Calls iwl3945_rx_queue_restock to refill any empty
3613  *                            slots.
3614  * ...
3615  *
3616  */
3617
3618 /**
3619  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3620  */
3621 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3622 {
3623         int s = q->read - q->write;
3624         if (s <= 0)
3625                 s += RX_QUEUE_SIZE;
3626         /* keep some buffer to not confuse full and empty queue */
3627         s -= 2;
3628         if (s < 0)
3629                 s = 0;
3630         return s;
3631 }
3632
3633 /**
3634  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3635  */
3636 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3637 {
3638         u32 reg = 0;
3639         int rc = 0;
3640         unsigned long flags;
3641
3642         spin_lock_irqsave(&q->lock, flags);
3643
3644         if (q->need_update == 0)
3645                 goto exit_unlock;
3646
3647         /* If power-saving is in use, make sure device is awake */
3648         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3649                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3650
3651                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3652                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3653                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3654                         goto exit_unlock;
3655                 }
3656
3657                 rc = iwl3945_grab_nic_access(priv);
3658                 if (rc)
3659                         goto exit_unlock;
3660
3661                 /* Device expects a multiple of 8 */
3662                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3663                                      q->write & ~0x7);
3664                 iwl3945_release_nic_access(priv);
3665
3666         /* Else device is assumed to be awake */
3667         } else
3668                 /* Device expects a multiple of 8 */
3669                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3670
3671
3672         q->need_update = 0;
3673
3674  exit_unlock:
3675         spin_unlock_irqrestore(&q->lock, flags);
3676         return rc;
3677 }
3678
3679 /**
3680  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3681  */
3682 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3683                                           dma_addr_t dma_addr)
3684 {
3685         return cpu_to_le32((u32)dma_addr);
3686 }
3687
3688 /**
3689  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3690  *
3691  * If there are slots in the RX queue that need to be restocked,
3692  * and we have free pre-allocated buffers, fill the ranks as much
3693  * as we can, pulling from rx_free.
3694  *
3695  * This moves the 'write' index forward to catch up with 'processed', and
3696  * also updates the memory address in the firmware to reference the new
3697  * target buffer.
3698  */
3699 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3700 {
3701         struct iwl3945_rx_queue *rxq = &priv->rxq;
3702         struct list_head *element;
3703         struct iwl3945_rx_mem_buffer *rxb;
3704         unsigned long flags;
3705         int write, rc;
3706
3707         spin_lock_irqsave(&rxq->lock, flags);
3708         write = rxq->write & ~0x7;
3709         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3710                 /* Get next free Rx buffer, remove from free list */
3711                 element = rxq->rx_free.next;
3712                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3713                 list_del(element);
3714
3715                 /* Point to Rx buffer via next RBD in circular buffer */
3716                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3717                 rxq->queue[rxq->write] = rxb;
3718                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3719                 rxq->free_count--;
3720         }
3721         spin_unlock_irqrestore(&rxq->lock, flags);
3722         /* If the pre-allocated buffer pool is dropping low, schedule to
3723          * refill it */
3724         if (rxq->free_count <= RX_LOW_WATERMARK)
3725                 queue_work(priv->workqueue, &priv->rx_replenish);
3726
3727
3728         /* If we've added more space for the firmware to place data, tell it.
3729          * Increment device's write pointer in multiples of 8. */
3730         if ((write != (rxq->write & ~0x7))
3731             || (abs(rxq->write - rxq->read) > 7)) {
3732                 spin_lock_irqsave(&rxq->lock, flags);
3733                 rxq->need_update = 1;
3734                 spin_unlock_irqrestore(&rxq->lock, flags);
3735                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3736                 if (rc)
3737                         return rc;
3738         }
3739
3740         return 0;
3741 }
3742
3743 /**
3744  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3745  *
3746  * When moving to rx_free an SKB is allocated for the slot.
3747  *
3748  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3749  * This is called as a scheduled work item (except for during initialization)
3750  */
3751 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3752 {
3753         struct iwl3945_rx_queue *rxq = &priv->rxq;
3754         struct list_head *element;
3755         struct iwl3945_rx_mem_buffer *rxb;
3756         unsigned long flags;
3757         spin_lock_irqsave(&rxq->lock, flags);
3758         while (!list_empty(&rxq->rx_used)) {
3759                 element = rxq->rx_used.next;
3760                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3761
3762                 /* Alloc a new receive buffer */
3763                 rxb->skb =
3764                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3765                 if (!rxb->skb) {
3766                         if (net_ratelimit())
3767                                 printk(KERN_CRIT DRV_NAME
3768                                        ": Can not allocate SKB buffers\n");
3769                         /* We don't reschedule replenish work here -- we will
3770                          * call the restock method and if it still needs
3771                          * more buffers it will schedule replenish */
3772                         break;
3773                 }
3774
3775                 /* If radiotap head is required, reserve some headroom here.
3776                  * The physical head count is a variable rx_stats->phy_count.
3777                  * We reserve 4 bytes here. Plus these extra bytes, the
3778                  * headroom of the physical head should be enough for the
3779                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3780                  */
3781                 skb_reserve(rxb->skb, 4);
3782
3783                 priv->alloc_rxb_skb++;
3784                 list_del(element);
3785
3786                 /* Get physical address of RB/SKB */
3787                 rxb->dma_addr =
3788                     pci_map_single(priv->pci_dev, rxb->skb->data,
3789                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3790                 list_add_tail(&rxb->list, &rxq->rx_free);
3791                 rxq->free_count++;
3792         }
3793         spin_unlock_irqrestore(&rxq->lock, flags);
3794 }
3795
3796 /*
3797  * this should be called while priv->lock is locked
3798  */
3799 static void __iwl3945_rx_replenish(void *data)
3800 {
3801         struct iwl3945_priv *priv = data;
3802
3803         iwl3945_rx_allocate(priv);
3804         iwl3945_rx_queue_restock(priv);
3805 }
3806
3807
3808 void iwl3945_rx_replenish(void *data)
3809 {
3810         struct iwl3945_priv *priv = data;
3811         unsigned long flags;
3812
3813         iwl3945_rx_allocate(priv);
3814
3815         spin_lock_irqsave(&priv->lock, flags);
3816         iwl3945_rx_queue_restock(priv);
3817         spin_unlock_irqrestore(&priv->lock, flags);
3818 }
3819
3820 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3821  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3822  * This free routine walks the list of POOL entries and if SKB is set to
3823  * non NULL it is unmapped and freed
3824  */
3825 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3826 {
3827         int i;
3828         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3829                 if (rxq->pool[i].skb != NULL) {
3830                         pci_unmap_single(priv->pci_dev,
3831                                          rxq->pool[i].dma_addr,
3832                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3833                         dev_kfree_skb(rxq->pool[i].skb);
3834                 }
3835         }
3836
3837         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3838                             rxq->dma_addr);
3839         rxq->bd = NULL;
3840 }
3841
3842 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3843 {
3844         struct iwl3945_rx_queue *rxq = &priv->rxq;
3845         struct pci_dev *dev = priv->pci_dev;
3846         int i;
3847
3848         spin_lock_init(&rxq->lock);
3849         INIT_LIST_HEAD(&rxq->rx_free);
3850         INIT_LIST_HEAD(&rxq->rx_used);
3851
3852         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3853         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3854         if (!rxq->bd)
3855                 return -ENOMEM;
3856
3857         /* Fill the rx_used queue with _all_ of the Rx buffers */
3858         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3859                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3860
3861         /* Set us so that we have processed and used all buffers, but have
3862          * not restocked the Rx queue with fresh buffers */
3863         rxq->read = rxq->write = 0;
3864         rxq->free_count = 0;
3865         rxq->need_update = 0;
3866         return 0;
3867 }
3868
3869 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3870 {
3871         unsigned long flags;
3872         int i;
3873         spin_lock_irqsave(&rxq->lock, flags);
3874         INIT_LIST_HEAD(&rxq->rx_free);
3875         INIT_LIST_HEAD(&rxq->rx_used);
3876         /* Fill the rx_used queue with _all_ of the Rx buffers */
3877         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3878                 /* In the reset function, these buffers may have been allocated
3879                  * to an SKB, so we need to unmap and free potential storage */
3880                 if (rxq->pool[i].skb != NULL) {
3881                         pci_unmap_single(priv->pci_dev,
3882                                          rxq->pool[i].dma_addr,
3883                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3884                         priv->alloc_rxb_skb--;
3885                         dev_kfree_skb(rxq->pool[i].skb);
3886                         rxq->pool[i].skb = NULL;
3887                 }
3888                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3889         }
3890
3891         /* Set us so that we have processed and used all buffers, but have
3892          * not restocked the Rx queue with fresh buffers */
3893         rxq->read = rxq->write = 0;
3894         rxq->free_count = 0;
3895         spin_unlock_irqrestore(&rxq->lock, flags);
3896 }
3897
3898 /* Convert linear signal-to-noise ratio into dB */
3899 static u8 ratio2dB[100] = {
3900 /*       0   1   2   3   4   5   6   7   8   9 */
3901          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3902         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3903         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3904         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3905         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3906         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3907         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3908         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3909         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3910         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3911 };
3912
3913 /* Calculates a relative dB value from a ratio of linear
3914  *   (i.e. not dB) signal levels.
3915  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3916 int iwl3945_calc_db_from_ratio(int sig_ratio)
3917 {
3918         /* 1000:1 or higher just report as 60 dB */
3919         if (sig_ratio >= 1000)
3920                 return 60;
3921
3922         /* 100:1 or higher, divide by 10 and use table,
3923          *   add 20 dB to make up for divide by 10 */
3924         if (sig_ratio >= 100)
3925                 return (20 + (int)ratio2dB[sig_ratio/10]);
3926
3927         /* We shouldn't see this */
3928         if (sig_ratio < 1)
3929                 return 0;
3930
3931         /* Use table for ratios 1:1 - 99:1 */
3932         return (int)ratio2dB[sig_ratio];
3933 }
3934
3935 #define PERFECT_RSSI (-20) /* dBm */
3936 #define WORST_RSSI (-95)   /* dBm */
3937 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3938
3939 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3940  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3941  *   about formulas used below. */
3942 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3943 {
3944         int sig_qual;
3945         int degradation = PERFECT_RSSI - rssi_dbm;
3946
3947         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3948          * as indicator; formula is (signal dbm - noise dbm).
3949          * SNR at or above 40 is a great signal (100%).
3950          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3951          * Weakest usable signal is usually 10 - 15 dB SNR. */
3952         if (noise_dbm) {
3953                 if (rssi_dbm - noise_dbm >= 40)
3954                         return 100;
3955                 else if (rssi_dbm < noise_dbm)
3956                         return 0;
3957                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3958
3959         /* Else use just the signal level.
3960          * This formula is a least squares fit of data points collected and
3961          *   compared with a reference system that had a percentage (%) display
3962          *   for signal quality. */
3963         } else
3964                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3965                             (15 * RSSI_RANGE + 62 * degradation)) /
3966                            (RSSI_RANGE * RSSI_RANGE);
3967
3968         if (sig_qual > 100)
3969                 sig_qual = 100;
3970         else if (sig_qual < 1)
3971                 sig_qual = 0;
3972
3973         return sig_qual;
3974 }
3975
3976 /**
3977  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3978  *
3979  * Uses the priv->rx_handlers callback function array to invoke
3980  * the appropriate handlers, including command responses,
3981  * frame-received notifications, and other notifications.
3982  */
3983 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3984 {
3985         struct iwl3945_rx_mem_buffer *rxb;
3986         struct iwl3945_rx_packet *pkt;
3987         struct iwl3945_rx_queue *rxq = &priv->rxq;
3988         u32 r, i;
3989         int reclaim;
3990         unsigned long flags;
3991         u8 fill_rx = 0;
3992         u32 count = 8;
3993
3994         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3995          * buffer that the driver may process (last buffer filled by ucode). */
3996         r = iwl3945_hw_get_rx_read(priv);
3997         i = rxq->read;
3998
3999         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4000                 fill_rx = 1;
4001         /* Rx interrupt, but nothing sent from uCode */
4002         if (i == r)
4003                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4004
4005         while (i != r) {
4006                 rxb = rxq->queue[i];
4007
4008                 /* If an RXB doesn't have a Rx queue slot associated with it,
4009                  * then a bug has been introduced in the queue refilling
4010                  * routines -- catch it here */
4011                 BUG_ON(rxb == NULL);
4012
4013                 rxq->queue[i] = NULL;
4014
4015                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4016                                             IWL_RX_BUF_SIZE,
4017                                             PCI_DMA_FROMDEVICE);
4018                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4019
4020                 /* Reclaim a command buffer only if this packet is a response
4021                  *   to a (driver-originated) command.
4022                  * If the packet (e.g. Rx frame) originated from uCode,
4023                  *   there is no command buffer to reclaim.
4024                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4025                  *   but apparently a few don't get set; catch them here. */
4026                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4027                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4028                         (pkt->hdr.cmd != REPLY_TX);
4029
4030                 /* Based on type of command response or notification,
4031                  *   handle those that need handling via function in
4032                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4033                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4034                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4035                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4036                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4037                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4038                 } else {
4039                         /* No handling needed */
4040                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4041                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4042                                 r, i, get_cmd_string(pkt->hdr.cmd),
4043                                 pkt->hdr.cmd);
4044                 }
4045
4046                 if (reclaim) {
4047                         /* Invoke any callbacks, transfer the skb to caller, and
4048                          * fire off the (possibly) blocking iwl3945_send_cmd()
4049                          * as we reclaim the driver command queue */
4050                         if (rxb && rxb->skb)
4051                                 iwl3945_tx_cmd_complete(priv, rxb);
4052                         else
4053                                 IWL_WARNING("Claim null rxb?\n");
4054                 }
4055
4056                 /* For now we just don't re-use anything.  We can tweak this
4057                  * later to try and re-use notification packets and SKBs that
4058                  * fail to Rx correctly */
4059                 if (rxb->skb != NULL) {
4060                         priv->alloc_rxb_skb--;
4061                         dev_kfree_skb_any(rxb->skb);
4062                         rxb->skb = NULL;
4063                 }
4064
4065                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4066                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4067                 spin_lock_irqsave(&rxq->lock, flags);
4068                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4069                 spin_unlock_irqrestore(&rxq->lock, flags);
4070                 i = (i + 1) & RX_QUEUE_MASK;
4071                 /* If there are a lot of unused frames,
4072                  * restock the Rx queue so ucode won't assert. */
4073                 if (fill_rx) {
4074                         count++;
4075                         if (count >= 8) {
4076                                 priv->rxq.read = i;
4077                                 __iwl3945_rx_replenish(priv);
4078                                 count = 0;
4079                         }
4080                 }
4081         }
4082
4083         /* Backtrack one entry */
4084         priv->rxq.read = i;
4085         iwl3945_rx_queue_restock(priv);
4086 }
4087
4088 /**
4089  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4090  */
4091 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4092                                   struct iwl3945_tx_queue *txq)
4093 {
4094         u32 reg = 0;
4095         int rc = 0;
4096         int txq_id = txq->q.id;
4097
4098         if (txq->need_update == 0)
4099                 return rc;
4100
4101         /* if we're trying to save power */
4102         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4103                 /* wake up nic if it's powered down ...
4104                  * uCode will wake up, and interrupt us again, so next
4105                  * time we'll skip this part. */
4106                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4107
4108                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4109                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4110                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4111                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4112                         return rc;
4113                 }
4114
4115                 /* restore this queue's parameters in nic hardware. */
4116                 rc = iwl3945_grab_nic_access(priv);
4117                 if (rc)
4118                         return rc;
4119                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4120                                      txq->q.write_ptr | (txq_id << 8));
4121                 iwl3945_release_nic_access(priv);
4122
4123         /* else not in power-save mode, uCode will never sleep when we're
4124          * trying to tx (during RFKILL, we're not trying to tx). */
4125         } else
4126                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4127                             txq->q.write_ptr | (txq_id << 8));
4128
4129         txq->need_update = 0;
4130
4131         return rc;
4132 }
4133
4134 #ifdef CONFIG_IWL3945_DEBUG
4135 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4136 {
4137         DECLARE_MAC_BUF(mac);
4138
4139         IWL_DEBUG_RADIO("RX CONFIG:\n");
4140         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4141         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4142         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4143         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4144                         le32_to_cpu(rxon->filter_flags));
4145         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4146         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4147                         rxon->ofdm_basic_rates);
4148         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4149         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4150                         print_mac(mac, rxon->node_addr));
4151         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4152                         print_mac(mac, rxon->bssid_addr));
4153         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4154 }
4155 #endif
4156
4157 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4158 {
4159         IWL_DEBUG_ISR("Enabling interrupts\n");
4160         set_bit(STATUS_INT_ENABLED, &priv->status);
4161         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4162 }
4163
4164
4165 /* call this function to flush any scheduled tasklet */
4166 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
4167 {
4168         /* wait to make sure we flush pedding tasklet*/
4169         synchronize_irq(priv->pci_dev->irq);
4170         tasklet_kill(&priv->irq_tasklet);
4171 }
4172
4173
4174 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4175 {
4176         clear_bit(STATUS_INT_ENABLED, &priv->status);
4177
4178         /* disable interrupts from uCode/NIC to host */
4179         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4180
4181         /* acknowledge/clear/reset any interrupts still pending
4182          * from uCode or flow handler (Rx/Tx DMA) */
4183         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4184         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4185         IWL_DEBUG_ISR("Disabled interrupts\n");
4186 }
4187
4188 static const char *desc_lookup(int i)
4189 {
4190         switch (i) {
4191         case 1:
4192                 return "FAIL";
4193         case 2:
4194                 return "BAD_PARAM";
4195         case 3:
4196                 return "BAD_CHECKSUM";
4197         case 4:
4198                 return "NMI_INTERRUPT";
4199         case 5:
4200                 return "SYSASSERT";
4201         case 6:
4202                 return "FATAL_ERROR";
4203         }
4204
4205         return "UNKNOWN";
4206 }
4207
4208 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4209 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4210
4211 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4212 {
4213         u32 i;
4214         u32 desc, time, count, base, data1;
4215         u32 blink1, blink2, ilink1, ilink2;
4216         int rc;
4217
4218         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4219
4220         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4221                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4222                 return;
4223         }
4224
4225         rc = iwl3945_grab_nic_access(priv);
4226         if (rc) {
4227                 IWL_WARNING("Can not read from adapter at this time.\n");
4228                 return;
4229         }
4230
4231         count = iwl3945_read_targ_mem(priv, base);
4232
4233         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4234                 IWL_ERROR("Start IWL Error Log Dump:\n");
4235                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4236         }
4237
4238         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4239                   "ilink1  nmiPC   Line\n");
4240         for (i = ERROR_START_OFFSET;
4241              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4242              i += ERROR_ELEM_SIZE) {
4243                 desc = iwl3945_read_targ_mem(priv, base + i);
4244                 time =
4245                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4246                 blink1 =
4247                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4248                 blink2 =
4249                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4250                 ilink1 =
4251                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4252                 ilink2 =
4253                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4254                 data1 =
4255                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4256
4257                 IWL_ERROR
4258                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4259                      desc_lookup(desc), desc, time, blink1, blink2,
4260                      ilink1, ilink2, data1);
4261         }
4262
4263         iwl3945_release_nic_access(priv);
4264
4265 }
4266
4267 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4268
4269 /**
4270  * iwl3945_print_event_log - Dump error event log to syslog
4271  *
4272  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4273  */
4274 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4275                                 u32 num_events, u32 mode)
4276 {
4277         u32 i;
4278         u32 base;       /* SRAM byte address of event log header */
4279         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4280         u32 ptr;        /* SRAM byte address of log data */
4281         u32 ev, time, data; /* event log data */
4282
4283         if (num_events == 0)
4284                 return;
4285
4286         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4287
4288         if (mode == 0)
4289                 event_size = 2 * sizeof(u32);
4290         else
4291                 event_size = 3 * sizeof(u32);
4292
4293         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4294
4295         /* "time" is actually "data" for mode 0 (no timestamp).
4296          * place event id # at far right for easier visual parsing. */
4297         for (i = 0; i < num_events; i++) {
4298                 ev = iwl3945_read_targ_mem(priv, ptr);
4299                 ptr += sizeof(u32);
4300                 time = iwl3945_read_targ_mem(priv, ptr);
4301                 ptr += sizeof(u32);
4302                 if (mode == 0)
4303                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4304                 else {
4305                         data = iwl3945_read_targ_mem(priv, ptr);
4306                         ptr += sizeof(u32);
4307                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4308                 }
4309         }
4310 }
4311
4312 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4313 {
4314         int rc;
4315         u32 base;       /* SRAM byte address of event log header */
4316         u32 capacity;   /* event log capacity in # entries */
4317         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4318         u32 num_wraps;  /* # times uCode wrapped to top of log */
4319         u32 next_entry; /* index of next entry to be written by uCode */
4320         u32 size;       /* # entries that we'll print */
4321
4322         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4323         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4324                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4325                 return;
4326         }
4327
4328         rc = iwl3945_grab_nic_access(priv);
4329         if (rc) {
4330                 IWL_WARNING("Can not read from adapter at this time.\n");
4331                 return;
4332         }
4333
4334         /* event log header */
4335         capacity = iwl3945_read_targ_mem(priv, base);
4336         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4337         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4338         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4339
4340         size = num_wraps ? capacity : next_entry;
4341
4342         /* bail out if nothing in log */
4343         if (size == 0) {
4344                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4345                 iwl3945_release_nic_access(priv);
4346                 return;
4347         }
4348
4349         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4350                   size, num_wraps);
4351
4352         /* if uCode has wrapped back to top of log, start at the oldest entry,
4353          * i.e the next one that uCode would fill. */
4354         if (num_wraps)
4355                 iwl3945_print_event_log(priv, next_entry,
4356                                     capacity - next_entry, mode);
4357
4358         /* (then/else) start at top of log */
4359         iwl3945_print_event_log(priv, 0, next_entry, mode);
4360
4361         iwl3945_release_nic_access(priv);
4362 }
4363
4364 /**
4365  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4366  */
4367 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4368 {
4369         /* Set the FW error flag -- cleared on iwl3945_down */
4370         set_bit(STATUS_FW_ERROR, &priv->status);
4371
4372         /* Cancel currently queued command. */
4373         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4374
4375 #ifdef CONFIG_IWL3945_DEBUG
4376         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4377                 iwl3945_dump_nic_error_log(priv);
4378                 iwl3945_dump_nic_event_log(priv);
4379                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4380         }
4381 #endif
4382
4383         wake_up_interruptible(&priv->wait_command_queue);
4384
4385         /* Keep the restart process from trying to send host
4386          * commands by clearing the INIT status bit */
4387         clear_bit(STATUS_READY, &priv->status);
4388
4389         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4390                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4391                           "Restarting adapter due to uCode error.\n");
4392
4393                 if (iwl3945_is_associated(priv)) {
4394                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4395                                sizeof(priv->recovery_rxon));
4396                         priv->error_recovering = 1;
4397                 }
4398                 queue_work(priv->workqueue, &priv->restart);
4399         }
4400 }
4401
4402 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4403 {
4404         unsigned long flags;
4405
4406         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4407                sizeof(priv->staging_rxon));
4408         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4409         iwl3945_commit_rxon(priv);
4410
4411         iwl3945_add_station(priv, priv->bssid, 1, 0);
4412
4413         spin_lock_irqsave(&priv->lock, flags);
4414         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4415         priv->error_recovering = 0;
4416         spin_unlock_irqrestore(&priv->lock, flags);
4417 }
4418
4419 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4420 {
4421         u32 inta, handled = 0;
4422         u32 inta_fh;
4423         unsigned long flags;
4424 #ifdef CONFIG_IWL3945_DEBUG
4425         u32 inta_mask;
4426 #endif
4427
4428         spin_lock_irqsave(&priv->lock, flags);
4429
4430         /* Ack/clear/reset pending uCode interrupts.
4431          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4432          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4433         inta = iwl3945_read32(priv, CSR_INT);
4434         iwl3945_write32(priv, CSR_INT, inta);
4435
4436         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4437          * Any new interrupts that happen after this, either while we're
4438          * in this tasklet, or later, will show up in next ISR/tasklet. */
4439         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4440         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4441
4442 #ifdef CONFIG_IWL3945_DEBUG
4443         if (iwl3945_debug_level & IWL_DL_ISR) {
4444                 /* just for debug */
4445                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4446                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4447                               inta, inta_mask, inta_fh);
4448         }
4449 #endif
4450
4451         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4452          * atomic, make sure that inta covers all the interrupts that
4453          * we've discovered, even if FH interrupt came in just after
4454          * reading CSR_INT. */
4455         if (inta_fh & CSR39_FH_INT_RX_MASK)
4456                 inta |= CSR_INT_BIT_FH_RX;
4457         if (inta_fh & CSR39_FH_INT_TX_MASK)
4458                 inta |= CSR_INT_BIT_FH_TX;
4459
4460         /* Now service all interrupt bits discovered above. */
4461         if (inta & CSR_INT_BIT_HW_ERR) {
4462                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4463
4464                 /* Tell the device to stop sending interrupts */
4465                 iwl3945_disable_interrupts(priv);
4466
4467                 iwl3945_irq_handle_error(priv);
4468
4469                 handled |= CSR_INT_BIT_HW_ERR;
4470
4471                 spin_unlock_irqrestore(&priv->lock, flags);
4472
4473                 return;
4474         }
4475
4476 #ifdef CONFIG_IWL3945_DEBUG
4477         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4478                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4479                 if (inta & CSR_INT_BIT_SCD)
4480                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4481                                       "the frame/frames.\n");
4482
4483                 /* Alive notification via Rx interrupt will do the real work */
4484                 if (inta & CSR_INT_BIT_ALIVE)
4485                         IWL_DEBUG_ISR("Alive interrupt\n");
4486         }
4487 #endif
4488         /* Safely ignore these bits for debug checks below */
4489         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4490
4491         /* HW RF KILL switch toggled (4965 only) */
4492         if (inta & CSR_INT_BIT_RF_KILL) {
4493                 int hw_rf_kill = 0;
4494                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4495                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4496                         hw_rf_kill = 1;
4497
4498                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4499                                 "RF_KILL bit toggled to %s.\n",
4500                                 hw_rf_kill ? "disable radio":"enable radio");
4501
4502                 /* Queue restart only if RF_KILL switch was set to "kill"
4503                  *   when we loaded driver, and is now set to "enable".
4504                  * After we're Alive, RF_KILL gets handled by
4505                  *   iwl3945_rx_card_state_notif() */
4506                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4507                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4508                         queue_work(priv->workqueue, &priv->restart);
4509                 }
4510
4511                 handled |= CSR_INT_BIT_RF_KILL;
4512         }
4513
4514         /* Chip got too hot and stopped itself (4965 only) */
4515         if (inta & CSR_INT_BIT_CT_KILL) {
4516                 IWL_ERROR("Microcode CT kill error detected.\n");
4517                 handled |= CSR_INT_BIT_CT_KILL;
4518         }
4519
4520         /* Error detected by uCode */
4521         if (inta & CSR_INT_BIT_SW_ERR) {
4522                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4523                           inta);
4524                 iwl3945_irq_handle_error(priv);
4525                 handled |= CSR_INT_BIT_SW_ERR;
4526         }
4527
4528         /* uCode wakes up after power-down sleep */
4529         if (inta & CSR_INT_BIT_WAKEUP) {
4530                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4531                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4532                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4533                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4534                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4535                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4536                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4537                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4538
4539                 handled |= CSR_INT_BIT_WAKEUP;
4540         }
4541
4542         /* All uCode command responses, including Tx command responses,
4543          * Rx "responses" (frame-received notification), and other
4544          * notifications from uCode come through here*/
4545         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4546                 iwl3945_rx_handle(priv);
4547                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4548         }
4549
4550         if (inta & CSR_INT_BIT_FH_TX) {
4551                 IWL_DEBUG_ISR("Tx interrupt\n");
4552
4553                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4554                 if (!iwl3945_grab_nic_access(priv)) {
4555                         iwl3945_write_direct32(priv,
4556                                              FH_TCSR_CREDIT
4557                                              (ALM_FH_SRVC_CHNL), 0x0);
4558                         iwl3945_release_nic_access(priv);
4559                 }
4560                 handled |= CSR_INT_BIT_FH_TX;
4561         }
4562
4563         if (inta & ~handled)
4564                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4565
4566         if (inta & ~CSR_INI_SET_MASK) {
4567                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4568                          inta & ~CSR_INI_SET_MASK);
4569                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4570         }
4571
4572         /* Re-enable all interrupts */
4573         /* only Re-enable if disabled by irq */
4574         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4575                 iwl3945_enable_interrupts(priv);
4576
4577 #ifdef CONFIG_IWL3945_DEBUG
4578         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4579                 inta = iwl3945_read32(priv, CSR_INT);
4580                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4581                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4582                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4583                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4584         }
4585 #endif
4586         spin_unlock_irqrestore(&priv->lock, flags);
4587 }
4588
4589 static irqreturn_t iwl3945_isr(int irq, void *data)
4590 {
4591         struct iwl3945_priv *priv = data;
4592         u32 inta, inta_mask;
4593         u32 inta_fh;
4594         if (!priv)
4595                 return IRQ_NONE;
4596
4597         spin_lock(&priv->lock);
4598
4599         /* Disable (but don't clear!) interrupts here to avoid
4600          *    back-to-back ISRs and sporadic interrupts from our NIC.
4601          * If we have something to service, the tasklet will re-enable ints.
4602          * If we *don't* have something, we'll re-enable before leaving here. */
4603         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4604         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4605
4606         /* Discover which interrupts are active/pending */
4607         inta = iwl3945_read32(priv, CSR_INT);
4608         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4609
4610         /* Ignore interrupt if there's nothing in NIC to service.
4611          * This may be due to IRQ shared with another device,
4612          * or due to sporadic interrupts thrown from our NIC. */
4613         if (!inta && !inta_fh) {
4614                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4615                 goto none;
4616         }
4617
4618         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4619                 /* Hardware disappeared */
4620                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4621                 goto unplugged;
4622         }
4623
4624         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4625                       inta, inta_mask, inta_fh);
4626
4627         inta &= ~CSR_INT_BIT_SCD;
4628
4629         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4630         if (likely(inta || inta_fh))
4631                 tasklet_schedule(&priv->irq_tasklet);
4632 unplugged:
4633         spin_unlock(&priv->lock);
4634
4635         return IRQ_HANDLED;
4636
4637  none:
4638         /* re-enable interrupts here since we don't have anything to service. */
4639         /* only Re-enable if disabled by irq */
4640         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4641                 iwl3945_enable_interrupts(priv);
4642         spin_unlock(&priv->lock);
4643         return IRQ_NONE;
4644 }
4645
4646 /************************** EEPROM BANDS ****************************
4647  *
4648  * The iwl3945_eeprom_band definitions below provide the mapping from the
4649  * EEPROM contents to the specific channel number supported for each
4650  * band.
4651  *
4652  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4653  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4654  * The specific geography and calibration information for that channel
4655  * is contained in the eeprom map itself.
4656  *
4657  * During init, we copy the eeprom information and channel map
4658  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4659  *
4660  * channel_map_24/52 provides the index in the channel_info array for a
4661  * given channel.  We have to have two separate maps as there is channel
4662  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4663  * band_2
4664  *
4665  * A value of 0xff stored in the channel_map indicates that the channel
4666  * is not supported by the hardware at all.
4667  *
4668  * A value of 0xfe in the channel_map indicates that the channel is not
4669  * valid for Tx with the current hardware.  This means that
4670  * while the system can tune and receive on a given channel, it may not
4671  * be able to associate or transmit any frames on that
4672  * channel.  There is no corresponding channel information for that
4673  * entry.
4674  *
4675  *********************************************************************/
4676
4677 /* 2.4 GHz */
4678 static const u8 iwl3945_eeprom_band_1[14] = {
4679         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4680 };
4681
4682 /* 5.2 GHz bands */
4683 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4684         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4685 };
4686
4687 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4688         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4689 };
4690
4691 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4692         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4693 };
4694
4695 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4696         145, 149, 153, 157, 161, 165
4697 };
4698
4699 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4700                                     int *eeprom_ch_count,
4701                                     const struct iwl3945_eeprom_channel
4702                                     **eeprom_ch_info,
4703                                     const u8 **eeprom_ch_index)
4704 {
4705         switch (band) {
4706         case 1:         /* 2.4GHz band */
4707                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4708                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4709                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4710                 break;
4711         case 2:         /* 4.9GHz band */
4712                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4713                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4714                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4715                 break;
4716         case 3:         /* 5.2GHz band */
4717                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4718                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4719                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4720                 break;
4721         case 4:         /* 5.5GHz band */
4722                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4723                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4724                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4725                 break;
4726         case 5:         /* 5.7GHz band */
4727                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4728                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4729                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4730                 break;
4731         default:
4732                 BUG();
4733                 return;
4734         }
4735 }
4736
4737 /**
4738  * iwl3945_get_channel_info - Find driver's private channel info
4739  *
4740  * Based on band and channel number.
4741  */
4742 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4743                                                     enum ieee80211_band band, u16 channel)
4744 {
4745         int i;
4746
4747         switch (band) {
4748         case IEEE80211_BAND_5GHZ:
4749                 for (i = 14; i < priv->channel_count; i++) {
4750                         if (priv->channel_info[i].channel == channel)
4751                                 return &priv->channel_info[i];
4752                 }
4753                 break;
4754
4755         case IEEE80211_BAND_2GHZ:
4756                 if (channel >= 1 && channel <= 14)
4757                         return &priv->channel_info[channel - 1];
4758                 break;
4759         case IEEE80211_NUM_BANDS:
4760                 WARN_ON(1);
4761         }
4762
4763         return NULL;
4764 }
4765
4766 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4767                             ? # x " " : "")
4768
4769 /**
4770  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4771  */
4772 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4773 {
4774         int eeprom_ch_count = 0;
4775         const u8 *eeprom_ch_index = NULL;
4776         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4777         int band, ch;
4778         struct iwl3945_channel_info *ch_info;
4779
4780         if (priv->channel_count) {
4781                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4782                 return 0;
4783         }
4784
4785         if (priv->eeprom.version < 0x2f) {
4786                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4787                             priv->eeprom.version);
4788                 return -EINVAL;
4789         }
4790
4791         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4792
4793         priv->channel_count =
4794             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4795             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4796             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4797             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4798             ARRAY_SIZE(iwl3945_eeprom_band_5);
4799
4800         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4801
4802         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4803                                      priv->channel_count, GFP_KERNEL);
4804         if (!priv->channel_info) {
4805                 IWL_ERROR("Could not allocate channel_info\n");
4806                 priv->channel_count = 0;
4807                 return -ENOMEM;
4808         }
4809
4810         ch_info = priv->channel_info;
4811
4812         /* Loop through the 5 EEPROM bands adding them in order to the
4813          * channel map we maintain (that contains additional information than
4814          * what just in the EEPROM) */
4815         for (band = 1; band <= 5; band++) {
4816
4817                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4818                                         &eeprom_ch_info, &eeprom_ch_index);
4819
4820                 /* Loop through each band adding each of the channels */
4821                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4822                         ch_info->channel = eeprom_ch_index[ch];
4823                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4824                             IEEE80211_BAND_5GHZ;
4825
4826                         /* permanently store EEPROM's channel regulatory flags
4827                          *   and max power in channel info database. */
4828                         ch_info->eeprom = eeprom_ch_info[ch];
4829
4830                         /* Copy the run-time flags so they are there even on
4831                          * invalid channels */
4832                         ch_info->flags = eeprom_ch_info[ch].flags;
4833
4834                         if (!(is_channel_valid(ch_info))) {
4835                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4836                                                "No traffic\n",
4837                                                ch_info->channel,
4838                                                ch_info->flags,
4839                                                is_channel_a_band(ch_info) ?
4840                                                "5.2" : "2.4");
4841                                 ch_info++;
4842                                 continue;
4843                         }
4844
4845                         /* Initialize regulatory-based run-time data */
4846                         ch_info->max_power_avg = ch_info->curr_txpow =
4847                             eeprom_ch_info[ch].max_power_avg;
4848                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4849                         ch_info->min_power = 0;
4850
4851                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s%s(0x%02x"
4852                                        " %ddBm): Ad-Hoc %ssupported\n",
4853                                        ch_info->channel,
4854                                        is_channel_a_band(ch_info) ?
4855                                        "5.2" : "2.4",
4856                                        CHECK_AND_PRINT(VALID),
4857                                        CHECK_AND_PRINT(IBSS),
4858                                        CHECK_AND_PRINT(ACTIVE),
4859                                        CHECK_AND_PRINT(RADAR),
4860                                        CHECK_AND_PRINT(WIDE),
4861                                        CHECK_AND_PRINT(NARROW),
4862                                        CHECK_AND_PRINT(DFS),
4863                                        eeprom_ch_info[ch].flags,
4864                                        eeprom_ch_info[ch].max_power_avg,
4865                                        ((eeprom_ch_info[ch].
4866                                          flags & EEPROM_CHANNEL_IBSS)
4867                                         && !(eeprom_ch_info[ch].
4868                                              flags & EEPROM_CHANNEL_RADAR))
4869                                        ? "" : "not ");
4870
4871                         /* Set the user_txpower_limit to the highest power
4872                          * supported by any channel */
4873                         if (eeprom_ch_info[ch].max_power_avg >
4874                             priv->user_txpower_limit)
4875                                 priv->user_txpower_limit =
4876                                     eeprom_ch_info[ch].max_power_avg;
4877
4878                         ch_info++;
4879                 }
4880         }
4881
4882         /* Set up txpower settings in driver for all channels */
4883         if (iwl3945_txpower_set_from_eeprom(priv))
4884                 return -EIO;
4885
4886         return 0;
4887 }
4888
4889 /*
4890  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4891  */
4892 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4893 {
4894         kfree(priv->channel_info);
4895         priv->channel_count = 0;
4896 }
4897
4898 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4899  * sending probe req.  This should be set long enough to hear probe responses
4900  * from more than one AP.  */
4901 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4902 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4903
4904 /* For faster active scanning, scan will move to the next channel if fewer than
4905  * PLCP_QUIET_THRESH packets are heard on this channel within
4906  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4907  * time if it's a quiet channel (nothing responded to our probe, and there's
4908  * no other traffic).
4909  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4910 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4911 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4912
4913 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4914  * Must be set longer than active dwell time.
4915  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4916 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4917 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4918 #define IWL_PASSIVE_DWELL_BASE      (100)
4919 #define IWL_CHANNEL_TUNE_TIME       5
4920
4921 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4922                                                 enum ieee80211_band band)
4923 {
4924         if (band == IEEE80211_BAND_5GHZ)
4925                 return IWL_ACTIVE_DWELL_TIME_52;
4926         else
4927                 return IWL_ACTIVE_DWELL_TIME_24;
4928 }
4929
4930 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4931                                           enum ieee80211_band band)
4932 {
4933         u16 active = iwl3945_get_active_dwell_time(priv, band);
4934         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4935             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4936             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4937
4938         if (iwl3945_is_associated(priv)) {
4939                 /* If we're associated, we clamp the maximum passive
4940                  * dwell time to be 98% of the beacon interval (minus
4941                  * 2 * channel tune time) */
4942                 passive = priv->beacon_int;
4943                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4944                         passive = IWL_PASSIVE_DWELL_BASE;
4945                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4946         }
4947
4948         if (passive <= active)
4949                 passive = active + 1;
4950
4951         return passive;
4952 }
4953
4954 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4955                                          enum ieee80211_band band,
4956                                      u8 is_active, u8 direct_mask,
4957                                      struct iwl3945_scan_channel *scan_ch)
4958 {
4959         const struct ieee80211_channel *channels = NULL;
4960         const struct ieee80211_supported_band *sband;
4961         const struct iwl3945_channel_info *ch_info;
4962         u16 passive_dwell = 0;
4963         u16 active_dwell = 0;
4964         int added, i;
4965
4966         sband = iwl3945_get_band(priv, band);
4967         if (!sband)
4968                 return 0;
4969
4970         channels = sband->channels;
4971
4972         active_dwell = iwl3945_get_active_dwell_time(priv, band);
4973         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4974
4975         for (i = 0, added = 0; i < sband->n_channels; i++) {
4976                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4977                         continue;
4978
4979                 scan_ch->channel = channels[i].hw_value;
4980
4981                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4982                 if (!is_channel_valid(ch_info)) {
4983                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
4984                                        scan_ch->channel);
4985                         continue;
4986                 }
4987
4988                 if (!is_active || is_channel_passive(ch_info) ||
4989                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4990                         scan_ch->type = 0;      /* passive */
4991                 else
4992                         scan_ch->type = 1;      /* active */
4993
4994                 if (scan_ch->type & 1)
4995                         scan_ch->type |= (direct_mask << 1);
4996
4997                 if (is_channel_narrow(ch_info))
4998                         scan_ch->type |= (1 << 7);
4999
5000                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5001                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5002
5003                 /* Set txpower levels to defaults */
5004                 scan_ch->tpc.dsp_atten = 110;
5005                 /* scan_pwr_info->tpc.dsp_atten; */
5006
5007                 /*scan_pwr_info->tpc.tx_gain; */
5008                 if (band == IEEE80211_BAND_5GHZ)
5009                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5010                 else {
5011                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5012                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5013                          * power level:
5014                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5015                          */
5016                 }
5017
5018                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5019                                scan_ch->channel,
5020                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5021                                (scan_ch->type & 1) ?
5022                                active_dwell : passive_dwell);
5023
5024                 scan_ch++;
5025                 added++;
5026         }
5027
5028         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5029         return added;
5030 }
5031
5032 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5033                               struct ieee80211_rate *rates)
5034 {
5035         int i;
5036
5037         for (i = 0; i < IWL_RATE_COUNT; i++) {
5038                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
5039                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5040                 rates[i].hw_value_short = i;
5041                 rates[i].flags = 0;
5042                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5043                         /*
5044                          * If CCK != 1M then set short preamble rate flag.
5045                          */
5046                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5047                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5048                 }
5049         }
5050 }
5051
5052 /**
5053  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5054  */
5055 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5056 {
5057         struct iwl3945_channel_info *ch;
5058         struct ieee80211_supported_band *sband;
5059         struct ieee80211_channel *channels;
5060         struct ieee80211_channel *geo_ch;
5061         struct ieee80211_rate *rates;
5062         int i = 0;
5063
5064         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5065             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5066                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5067                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5068                 return 0;
5069         }
5070
5071         channels = kzalloc(sizeof(struct ieee80211_channel) *
5072                            priv->channel_count, GFP_KERNEL);
5073         if (!channels)
5074                 return -ENOMEM;
5075
5076         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5077                         GFP_KERNEL);
5078         if (!rates) {
5079                 kfree(channels);
5080                 return -ENOMEM;
5081         }
5082
5083         /* 5.2GHz channels start after the 2.4GHz channels */
5084         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5085         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5086         /* just OFDM */
5087         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5088         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5089
5090         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5091         sband->channels = channels;
5092         /* OFDM & CCK */
5093         sband->bitrates = rates;
5094         sband->n_bitrates = IWL_RATE_COUNT;
5095
5096         priv->ieee_channels = channels;
5097         priv->ieee_rates = rates;
5098
5099         iwl3945_init_hw_rates(priv, rates);
5100
5101         for (i = 0;  i < priv->channel_count; i++) {
5102                 ch = &priv->channel_info[i];
5103
5104                 /* FIXME: might be removed if scan is OK*/
5105                 if (!is_channel_valid(ch))
5106                         continue;
5107
5108                 if (is_channel_a_band(ch))
5109                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5110                 else
5111                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5112
5113                 geo_ch = &sband->channels[sband->n_channels++];
5114
5115                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5116                 geo_ch->max_power = ch->max_power_avg;
5117                 geo_ch->max_antenna_gain = 0xff;
5118                 geo_ch->hw_value = ch->channel;
5119
5120                 if (is_channel_valid(ch)) {
5121                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5122                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5123
5124                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5125                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5126
5127                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5128                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5129
5130                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5131                                 priv->max_channel_txpower_limit =
5132                                     ch->max_power_avg;
5133                 } else {
5134                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5135                 }
5136
5137                 /* Save flags for reg domain usage */
5138                 geo_ch->orig_flags = geo_ch->flags;
5139
5140                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5141                                 ch->channel, geo_ch->center_freq,
5142                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5143                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5144                                 "restricted" : "valid",
5145                                  geo_ch->flags);
5146         }
5147
5148         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5149              priv->cfg->sku & IWL_SKU_A) {
5150                 printk(KERN_INFO DRV_NAME
5151                        ": Incorrectly detected BG card as ABG.  Please send "
5152                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5153                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5154                  priv->cfg->sku &= ~IWL_SKU_A;
5155         }
5156
5157         printk(KERN_INFO DRV_NAME
5158                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5159                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5160                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5161
5162         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5163                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5164                         &priv->bands[IEEE80211_BAND_2GHZ];
5165         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5166                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5167                         &priv->bands[IEEE80211_BAND_5GHZ];
5168
5169         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5170
5171         return 0;
5172 }
5173
5174 /*
5175  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5176  */
5177 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5178 {
5179         kfree(priv->ieee_channels);
5180         kfree(priv->ieee_rates);
5181         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5182 }
5183
5184 /******************************************************************************
5185  *
5186  * uCode download functions
5187  *
5188  ******************************************************************************/
5189
5190 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5191 {
5192         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5193         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5194         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5195         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5196         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5197         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5198 }
5199
5200 /**
5201  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5202  *     looking at all data.
5203  */
5204 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5205 {
5206         u32 val;
5207         u32 save_len = len;
5208         int rc = 0;
5209         u32 errcnt;
5210
5211         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5212
5213         rc = iwl3945_grab_nic_access(priv);
5214         if (rc)
5215                 return rc;
5216
5217         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5218
5219         errcnt = 0;
5220         for (; len > 0; len -= sizeof(u32), image++) {
5221                 /* read data comes through single port, auto-incr addr */
5222                 /* NOTE: Use the debugless read so we don't flood kernel log
5223                  * if IWL_DL_IO is set */
5224                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5225                 if (val != le32_to_cpu(*image)) {
5226                         IWL_ERROR("uCode INST section is invalid at "
5227                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5228                                   save_len - len, val, le32_to_cpu(*image));
5229                         rc = -EIO;
5230                         errcnt++;
5231                         if (errcnt >= 20)
5232                                 break;
5233                 }
5234         }
5235
5236         iwl3945_release_nic_access(priv);
5237
5238         if (!errcnt)
5239                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5240
5241         return rc;
5242 }
5243
5244
5245 /**
5246  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5247  *   using sample data 100 bytes apart.  If these sample points are good,
5248  *   it's a pretty good bet that everything between them is good, too.
5249  */
5250 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5251 {
5252         u32 val;
5253         int rc = 0;
5254         u32 errcnt = 0;
5255         u32 i;
5256
5257         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5258
5259         rc = iwl3945_grab_nic_access(priv);
5260         if (rc)
5261                 return rc;
5262
5263         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5264                 /* read data comes through single port, auto-incr addr */
5265                 /* NOTE: Use the debugless read so we don't flood kernel log
5266                  * if IWL_DL_IO is set */
5267                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5268                         i + RTC_INST_LOWER_BOUND);
5269                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5270                 if (val != le32_to_cpu(*image)) {
5271 #if 0 /* Enable this if you want to see details */
5272                         IWL_ERROR("uCode INST section is invalid at "
5273                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5274                                   i, val, *image);
5275 #endif
5276                         rc = -EIO;
5277                         errcnt++;
5278                         if (errcnt >= 3)
5279                                 break;
5280                 }
5281         }
5282
5283         iwl3945_release_nic_access(priv);
5284
5285         return rc;
5286 }
5287
5288
5289 /**
5290  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5291  *    and verify its contents
5292  */
5293 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5294 {
5295         __le32 *image;
5296         u32 len;
5297         int rc = 0;
5298
5299         /* Try bootstrap */
5300         image = (__le32 *)priv->ucode_boot.v_addr;
5301         len = priv->ucode_boot.len;
5302         rc = iwl3945_verify_inst_sparse(priv, image, len);
5303         if (rc == 0) {
5304                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5305                 return 0;
5306         }
5307
5308         /* Try initialize */
5309         image = (__le32 *)priv->ucode_init.v_addr;
5310         len = priv->ucode_init.len;
5311         rc = iwl3945_verify_inst_sparse(priv, image, len);
5312         if (rc == 0) {
5313                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5314                 return 0;
5315         }
5316
5317         /* Try runtime/protocol */
5318         image = (__le32 *)priv->ucode_code.v_addr;
5319         len = priv->ucode_code.len;
5320         rc = iwl3945_verify_inst_sparse(priv, image, len);
5321         if (rc == 0) {
5322                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5323                 return 0;
5324         }
5325
5326         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5327
5328         /* Since nothing seems to match, show first several data entries in
5329          * instruction SRAM, so maybe visual inspection will give a clue.
5330          * Selection of bootstrap image (vs. other images) is arbitrary. */
5331         image = (__le32 *)priv->ucode_boot.v_addr;
5332         len = priv->ucode_boot.len;
5333         rc = iwl3945_verify_inst_full(priv, image, len);
5334
5335         return rc;
5336 }
5337
5338
5339 /* check contents of special bootstrap uCode SRAM */
5340 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5341 {
5342         __le32 *image = priv->ucode_boot.v_addr;
5343         u32 len = priv->ucode_boot.len;
5344         u32 reg;
5345         u32 val;
5346
5347         IWL_DEBUG_INFO("Begin verify bsm\n");
5348
5349         /* verify BSM SRAM contents */
5350         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5351         for (reg = BSM_SRAM_LOWER_BOUND;
5352              reg < BSM_SRAM_LOWER_BOUND + len;
5353              reg += sizeof(u32), image ++) {
5354                 val = iwl3945_read_prph(priv, reg);
5355                 if (val != le32_to_cpu(*image)) {
5356                         IWL_ERROR("BSM uCode verification failed at "
5357                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5358                                   BSM_SRAM_LOWER_BOUND,
5359                                   reg - BSM_SRAM_LOWER_BOUND, len,
5360                                   val, le32_to_cpu(*image));
5361                         return -EIO;
5362                 }
5363         }
5364
5365         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5366
5367         return 0;
5368 }
5369
5370 /**
5371  * iwl3945_load_bsm - Load bootstrap instructions
5372  *
5373  * BSM operation:
5374  *
5375  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5376  * in special SRAM that does not power down during RFKILL.  When powering back
5377  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5378  * the bootstrap program into the on-board processor, and starts it.
5379  *
5380  * The bootstrap program loads (via DMA) instructions and data for a new
5381  * program from host DRAM locations indicated by the host driver in the
5382  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5383  * automatically.
5384  *
5385  * When initializing the NIC, the host driver points the BSM to the
5386  * "initialize" uCode image.  This uCode sets up some internal data, then
5387  * notifies host via "initialize alive" that it is complete.
5388  *
5389  * The host then replaces the BSM_DRAM_* pointer values to point to the
5390  * normal runtime uCode instructions and a backup uCode data cache buffer
5391  * (filled initially with starting data values for the on-board processor),
5392  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5393  * which begins normal operation.
5394  *
5395  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5396  * the backup data cache in DRAM before SRAM is powered down.
5397  *
5398  * When powering back up, the BSM loads the bootstrap program.  This reloads
5399  * the runtime uCode instructions and the backup data cache into SRAM,
5400  * and re-launches the runtime uCode from where it left off.
5401  */
5402 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5403 {
5404         __le32 *image = priv->ucode_boot.v_addr;
5405         u32 len = priv->ucode_boot.len;
5406         dma_addr_t pinst;
5407         dma_addr_t pdata;
5408         u32 inst_len;
5409         u32 data_len;
5410         int rc;
5411         int i;
5412         u32 done;
5413         u32 reg_offset;
5414
5415         IWL_DEBUG_INFO("Begin load bsm\n");
5416
5417         /* make sure bootstrap program is no larger than BSM's SRAM size */
5418         if (len > IWL_MAX_BSM_SIZE)
5419                 return -EINVAL;
5420
5421         /* Tell bootstrap uCode where to find the "Initialize" uCode
5422          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5423          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5424          *        after the "initialize" uCode has run, to point to
5425          *        runtime/protocol instructions and backup data cache. */
5426         pinst = priv->ucode_init.p_addr;
5427         pdata = priv->ucode_init_data.p_addr;
5428         inst_len = priv->ucode_init.len;
5429         data_len = priv->ucode_init_data.len;
5430
5431         rc = iwl3945_grab_nic_access(priv);
5432         if (rc)
5433                 return rc;
5434
5435         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5436         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5437         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5438         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5439
5440         /* Fill BSM memory with bootstrap instructions */
5441         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5442              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5443              reg_offset += sizeof(u32), image++)
5444                 _iwl3945_write_prph(priv, reg_offset,
5445                                           le32_to_cpu(*image));
5446
5447         rc = iwl3945_verify_bsm(priv);
5448         if (rc) {
5449                 iwl3945_release_nic_access(priv);
5450                 return rc;
5451         }
5452
5453         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5454         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5455         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5456                                  RTC_INST_LOWER_BOUND);
5457         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5458
5459         /* Load bootstrap code into instruction SRAM now,
5460          *   to prepare to load "initialize" uCode */
5461         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5462                 BSM_WR_CTRL_REG_BIT_START);
5463
5464         /* Wait for load of bootstrap uCode to finish */
5465         for (i = 0; i < 100; i++) {
5466                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5467                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5468                         break;
5469                 udelay(10);
5470         }
5471         if (i < 100)
5472                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5473         else {
5474                 IWL_ERROR("BSM write did not complete!\n");
5475                 return -EIO;
5476         }
5477
5478         /* Enable future boot loads whenever power management unit triggers it
5479          *   (e.g. when powering back up after power-save shutdown) */
5480         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5481                 BSM_WR_CTRL_REG_BIT_START_EN);
5482
5483         iwl3945_release_nic_access(priv);
5484
5485         return 0;
5486 }
5487
5488 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5489 {
5490         /* Remove all resets to allow NIC to operate */
5491         iwl3945_write32(priv, CSR_RESET, 0);
5492 }
5493
5494 /**
5495  * iwl3945_read_ucode - Read uCode images from disk file.
5496  *
5497  * Copy into buffers for card to fetch via bus-mastering
5498  */
5499 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5500 {
5501         struct iwl3945_ucode *ucode;
5502         int ret = 0;
5503         const struct firmware *ucode_raw;
5504         /* firmware file name contains uCode/driver compatibility version */
5505         const char *name = priv->cfg->fw_name;
5506         u8 *src;
5507         size_t len;
5508         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5509
5510         /* Ask kernel firmware_class module to get the boot firmware off disk.
5511          * request_firmware() is synchronous, file is in memory on return. */
5512         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5513         if (ret < 0) {
5514                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5515                                 name, ret);
5516                 goto error;
5517         }
5518
5519         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5520                        name, ucode_raw->size);
5521
5522         /* Make sure that we got at least our header! */
5523         if (ucode_raw->size < sizeof(*ucode)) {
5524                 IWL_ERROR("File size way too small!\n");
5525                 ret = -EINVAL;
5526                 goto err_release;
5527         }
5528
5529         /* Data from ucode file:  header followed by uCode images */
5530         ucode = (void *)ucode_raw->data;
5531
5532         ver = le32_to_cpu(ucode->ver);
5533         inst_size = le32_to_cpu(ucode->inst_size);
5534         data_size = le32_to_cpu(ucode->data_size);
5535         init_size = le32_to_cpu(ucode->init_size);
5536         init_data_size = le32_to_cpu(ucode->init_data_size);
5537         boot_size = le32_to_cpu(ucode->boot_size);
5538
5539         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5540         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5541         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5542         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5543         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5544         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5545
5546         /* Verify size of file vs. image size info in file's header */
5547         if (ucode_raw->size < sizeof(*ucode) +
5548                 inst_size + data_size + init_size +
5549                 init_data_size + boot_size) {
5550
5551                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5552                                (int)ucode_raw->size);
5553                 ret = -EINVAL;
5554                 goto err_release;
5555         }
5556
5557         /* Verify that uCode images will fit in card's SRAM */
5558         if (inst_size > IWL_MAX_INST_SIZE) {
5559                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5560                                inst_size);
5561                 ret = -EINVAL;
5562                 goto err_release;
5563         }
5564
5565         if (data_size > IWL_MAX_DATA_SIZE) {
5566                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5567                                data_size);
5568                 ret = -EINVAL;
5569                 goto err_release;
5570         }
5571         if (init_size > IWL_MAX_INST_SIZE) {
5572                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5573                                 init_size);
5574                 ret = -EINVAL;
5575                 goto err_release;
5576         }
5577         if (init_data_size > IWL_MAX_DATA_SIZE) {
5578                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5579                                 init_data_size);
5580                 ret = -EINVAL;
5581                 goto err_release;
5582         }
5583         if (boot_size > IWL_MAX_BSM_SIZE) {
5584                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5585                                 boot_size);
5586                 ret = -EINVAL;
5587                 goto err_release;
5588         }
5589
5590         /* Allocate ucode buffers for card's bus-master loading ... */
5591
5592         /* Runtime instructions and 2 copies of data:
5593          * 1) unmodified from disk
5594          * 2) backup cache for save/restore during power-downs */
5595         priv->ucode_code.len = inst_size;
5596         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5597
5598         priv->ucode_data.len = data_size;
5599         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5600
5601         priv->ucode_data_backup.len = data_size;
5602         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5603
5604         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5605             !priv->ucode_data_backup.v_addr)
5606                 goto err_pci_alloc;
5607
5608         /* Initialization instructions and data */
5609         if (init_size && init_data_size) {
5610                 priv->ucode_init.len = init_size;
5611                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5612
5613                 priv->ucode_init_data.len = init_data_size;
5614                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5615
5616                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5617                         goto err_pci_alloc;
5618         }
5619
5620         /* Bootstrap (instructions only, no data) */
5621         if (boot_size) {
5622                 priv->ucode_boot.len = boot_size;
5623                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5624
5625                 if (!priv->ucode_boot.v_addr)
5626                         goto err_pci_alloc;
5627         }
5628
5629         /* Copy images into buffers for card's bus-master reads ... */
5630
5631         /* Runtime instructions (first block of data in file) */
5632         src = &ucode->data[0];
5633         len = priv->ucode_code.len;
5634         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5635         memcpy(priv->ucode_code.v_addr, src, len);
5636         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5637                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5638
5639         /* Runtime data (2nd block)
5640          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5641         src = &ucode->data[inst_size];
5642         len = priv->ucode_data.len;
5643         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5644         memcpy(priv->ucode_data.v_addr, src, len);
5645         memcpy(priv->ucode_data_backup.v_addr, src, len);
5646
5647         /* Initialization instructions (3rd block) */
5648         if (init_size) {
5649                 src = &ucode->data[inst_size + data_size];
5650                 len = priv->ucode_init.len;
5651                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5652                                len);
5653                 memcpy(priv->ucode_init.v_addr, src, len);
5654         }
5655
5656         /* Initialization data (4th block) */
5657         if (init_data_size) {
5658                 src = &ucode->data[inst_size + data_size + init_size];
5659                 len = priv->ucode_init_data.len;
5660                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5661                                (int)len);
5662                 memcpy(priv->ucode_init_data.v_addr, src, len);
5663         }
5664
5665         /* Bootstrap instructions (5th block) */
5666         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5667         len = priv->ucode_boot.len;
5668         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5669                        (int)len);
5670         memcpy(priv->ucode_boot.v_addr, src, len);
5671
5672         /* We have our copies now, allow OS release its copies */
5673         release_firmware(ucode_raw);
5674         return 0;
5675
5676  err_pci_alloc:
5677         IWL_ERROR("failed to allocate pci memory\n");
5678         ret = -ENOMEM;
5679         iwl3945_dealloc_ucode_pci(priv);
5680
5681  err_release:
5682         release_firmware(ucode_raw);
5683
5684  error:
5685         return ret;
5686 }
5687
5688
5689 /**
5690  * iwl3945_set_ucode_ptrs - Set uCode address location
5691  *
5692  * Tell initialization uCode where to find runtime uCode.
5693  *
5694  * BSM registers initially contain pointers to initialization uCode.
5695  * We need to replace them to load runtime uCode inst and data,
5696  * and to save runtime data when powering down.
5697  */
5698 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5699 {
5700         dma_addr_t pinst;
5701         dma_addr_t pdata;
5702         int rc = 0;
5703         unsigned long flags;
5704
5705         /* bits 31:0 for 3945 */
5706         pinst = priv->ucode_code.p_addr;
5707         pdata = priv->ucode_data_backup.p_addr;
5708
5709         spin_lock_irqsave(&priv->lock, flags);
5710         rc = iwl3945_grab_nic_access(priv);
5711         if (rc) {
5712                 spin_unlock_irqrestore(&priv->lock, flags);
5713                 return rc;
5714         }
5715
5716         /* Tell bootstrap uCode where to find image to load */
5717         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5718         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5719         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5720                                  priv->ucode_data.len);
5721
5722         /* Inst bytecount must be last to set up, bit 31 signals uCode
5723          *   that all new ptr/size info is in place */
5724         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5725                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5726
5727         iwl3945_release_nic_access(priv);
5728
5729         spin_unlock_irqrestore(&priv->lock, flags);
5730
5731         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5732
5733         return rc;
5734 }
5735
5736 /**
5737  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5738  *
5739  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5740  *
5741  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5742  */
5743 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5744 {
5745         /* Check alive response for "valid" sign from uCode */
5746         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5747                 /* We had an error bringing up the hardware, so take it
5748                  * all the way back down so we can try again */
5749                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5750                 goto restart;
5751         }
5752
5753         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5754          * This is a paranoid check, because we would not have gotten the
5755          * "initialize" alive if code weren't properly loaded.  */
5756         if (iwl3945_verify_ucode(priv)) {
5757                 /* Runtime instruction load was bad;
5758                  * take it all the way back down so we can try again */
5759                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5760                 goto restart;
5761         }
5762
5763         /* Send pointers to protocol/runtime uCode image ... init code will
5764          * load and launch runtime uCode, which will send us another "Alive"
5765          * notification. */
5766         IWL_DEBUG_INFO("Initialization Alive received.\n");
5767         if (iwl3945_set_ucode_ptrs(priv)) {
5768                 /* Runtime instruction load won't happen;
5769                  * take it all the way back down so we can try again */
5770                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5771                 goto restart;
5772         }
5773         return;
5774
5775  restart:
5776         queue_work(priv->workqueue, &priv->restart);
5777 }
5778
5779
5780 /**
5781  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5782  *                   from protocol/runtime uCode (initialization uCode's
5783  *                   Alive gets handled by iwl3945_init_alive_start()).
5784  */
5785 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5786 {
5787         int rc = 0;
5788         int thermal_spin = 0;
5789         u32 rfkill;
5790
5791         IWL_DEBUG_INFO("Runtime Alive received.\n");
5792
5793         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5794                 /* We had an error bringing up the hardware, so take it
5795                  * all the way back down so we can try again */
5796                 IWL_DEBUG_INFO("Alive failed.\n");
5797                 goto restart;
5798         }
5799
5800         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5801          * This is a paranoid check, because we would not have gotten the
5802          * "runtime" alive if code weren't properly loaded.  */
5803         if (iwl3945_verify_ucode(priv)) {
5804                 /* Runtime instruction load was bad;
5805                  * take it all the way back down so we can try again */
5806                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5807                 goto restart;
5808         }
5809
5810         iwl3945_clear_stations_table(priv);
5811
5812         rc = iwl3945_grab_nic_access(priv);
5813         if (rc) {
5814                 IWL_WARNING("Can not read rfkill status from adapter\n");
5815                 return;
5816         }
5817
5818         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5819         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5820         iwl3945_release_nic_access(priv);
5821
5822         if (rfkill & 0x1) {
5823                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5824                 /* if rfkill is not on, then wait for thermal
5825                  * sensor in adapter to kick in */
5826                 while (iwl3945_hw_get_temperature(priv) == 0) {
5827                         thermal_spin++;
5828                         udelay(10);
5829                 }
5830
5831                 if (thermal_spin)
5832                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5833                                        thermal_spin * 10);
5834         } else
5835                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5836
5837         /* After the ALIVE response, we can send commands to 3945 uCode */
5838         set_bit(STATUS_ALIVE, &priv->status);
5839
5840         /* Clear out the uCode error bit if it is set */
5841         clear_bit(STATUS_FW_ERROR, &priv->status);
5842
5843         if (iwl3945_is_rfkill(priv))
5844                 return;
5845
5846         ieee80211_start_queues(priv->hw);
5847
5848         priv->active_rate = priv->rates_mask;
5849         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5850
5851         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5852
5853         if (iwl3945_is_associated(priv)) {
5854                 struct iwl3945_rxon_cmd *active_rxon =
5855                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5856
5857                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5858                        sizeof(priv->staging_rxon));
5859                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5860         } else {
5861                 /* Initialize our rx_config data */
5862                 iwl3945_connection_init_rx_config(priv);
5863                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5864         }
5865
5866         /* Configure Bluetooth device coexistence support */
5867         iwl3945_send_bt_config(priv);
5868
5869         /* Configure the adapter for unassociated operation */
5870         iwl3945_commit_rxon(priv);
5871
5872         /* At this point, the NIC is initialized and operational */
5873         priv->notif_missed_beacons = 0;
5874
5875         iwl3945_reg_txpower_periodic(priv);
5876
5877         iwl3945_led_register(priv);
5878
5879         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5880         set_bit(STATUS_READY, &priv->status);
5881         wake_up_interruptible(&priv->wait_command_queue);
5882
5883         if (priv->error_recovering)
5884                 iwl3945_error_recovery(priv);
5885
5886         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5887         return;
5888
5889  restart:
5890         queue_work(priv->workqueue, &priv->restart);
5891 }
5892
5893 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5894
5895 static void __iwl3945_down(struct iwl3945_priv *priv)
5896 {
5897         unsigned long flags;
5898         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5899         struct ieee80211_conf *conf = NULL;
5900
5901         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5902
5903         conf = ieee80211_get_hw_conf(priv->hw);
5904
5905         if (!exit_pending)
5906                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5907
5908         iwl3945_led_unregister(priv);
5909         iwl3945_clear_stations_table(priv);
5910
5911         /* Unblock any waiting calls */
5912         wake_up_interruptible_all(&priv->wait_command_queue);
5913
5914         /* Wipe out the EXIT_PENDING status bit if we are not actually
5915          * exiting the module */
5916         if (!exit_pending)
5917                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5918
5919         /* stop and reset the on-board processor */
5920         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5921
5922         /* tell the device to stop sending interrupts */
5923         spin_lock_irqsave(&priv->lock, flags);
5924         iwl3945_disable_interrupts(priv);
5925         spin_unlock_irqrestore(&priv->lock, flags);
5926         iwl_synchronize_irq(priv);
5927
5928         if (priv->mac80211_registered)
5929                 ieee80211_stop_queues(priv->hw);
5930
5931         /* If we have not previously called iwl3945_init() then
5932          * clear all bits but the RF Kill and SUSPEND bits and return */
5933         if (!iwl3945_is_init(priv)) {
5934                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5935                                         STATUS_RF_KILL_HW |
5936                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5937                                         STATUS_RF_KILL_SW |
5938                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5939                                         STATUS_GEO_CONFIGURED |
5940                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5941                                         STATUS_IN_SUSPEND;
5942                 goto exit;
5943         }
5944
5945         /* ...otherwise clear out all the status bits but the RF Kill and
5946          * SUSPEND bits and continue taking the NIC down. */
5947         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5948                                 STATUS_RF_KILL_HW |
5949                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5950                                 STATUS_RF_KILL_SW |
5951                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5952                                 STATUS_GEO_CONFIGURED |
5953                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5954                                 STATUS_IN_SUSPEND |
5955                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5956                                 STATUS_FW_ERROR;
5957
5958         spin_lock_irqsave(&priv->lock, flags);
5959         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5960         spin_unlock_irqrestore(&priv->lock, flags);
5961
5962         iwl3945_hw_txq_ctx_stop(priv);
5963         iwl3945_hw_rxq_stop(priv);
5964
5965         spin_lock_irqsave(&priv->lock, flags);
5966         if (!iwl3945_grab_nic_access(priv)) {
5967                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5968                                          APMG_CLK_VAL_DMA_CLK_RQT);
5969                 iwl3945_release_nic_access(priv);
5970         }
5971         spin_unlock_irqrestore(&priv->lock, flags);
5972
5973         udelay(5);
5974
5975         iwl3945_hw_nic_stop_master(priv);
5976         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5977         iwl3945_hw_nic_reset(priv);
5978
5979  exit:
5980         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5981
5982         if (priv->ibss_beacon)
5983                 dev_kfree_skb(priv->ibss_beacon);
5984         priv->ibss_beacon = NULL;
5985
5986         /* clear out any free frames */
5987         iwl3945_clear_free_frames(priv);
5988 }
5989
5990 static void iwl3945_down(struct iwl3945_priv *priv)
5991 {
5992         mutex_lock(&priv->mutex);
5993         __iwl3945_down(priv);
5994         mutex_unlock(&priv->mutex);
5995
5996         iwl3945_cancel_deferred_work(priv);
5997 }
5998
5999 #define MAX_HW_RESTARTS 5
6000
6001 static int __iwl3945_up(struct iwl3945_priv *priv)
6002 {
6003         int rc, i;
6004
6005         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6006                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6007                 return -EIO;
6008         }
6009
6010         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6011                 IWL_WARNING("Radio disabled by SW RF kill (module "
6012                             "parameter)\n");
6013                 return -ENODEV;
6014         }
6015
6016         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6017                 IWL_ERROR("ucode not available for device bringup\n");
6018                 return -EIO;
6019         }
6020
6021         /* If platform's RF_KILL switch is NOT set to KILL */
6022         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6023                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6024                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6025         else {
6026                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6027                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6028                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6029                         return -ENODEV;
6030                 }
6031         }
6032
6033         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6034
6035         rc = iwl3945_hw_nic_init(priv);
6036         if (rc) {
6037                 IWL_ERROR("Unable to int nic\n");
6038                 return rc;
6039         }
6040
6041         /* make sure rfkill handshake bits are cleared */
6042         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6043         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6044                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6045
6046         /* clear (again), then enable host interrupts */
6047         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6048         iwl3945_enable_interrupts(priv);
6049
6050         /* really make sure rfkill handshake bits are cleared */
6051         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6052         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6053
6054         /* Copy original ucode data image from disk into backup cache.
6055          * This will be used to initialize the on-board processor's
6056          * data SRAM for a clean start when the runtime program first loads. */
6057         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6058                priv->ucode_data.len);
6059
6060         /* We return success when we resume from suspend and rf_kill is on. */
6061         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6062                 return 0;
6063
6064         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6065
6066                 iwl3945_clear_stations_table(priv);
6067
6068                 /* load bootstrap state machine,
6069                  * load bootstrap program into processor's memory,
6070                  * prepare to load the "initialize" uCode */
6071                 rc = iwl3945_load_bsm(priv);
6072
6073                 if (rc) {
6074                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6075                         continue;
6076                 }
6077
6078                 /* start card; "initialize" will load runtime ucode */
6079                 iwl3945_nic_start(priv);
6080
6081                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6082
6083                 return 0;
6084         }
6085
6086         set_bit(STATUS_EXIT_PENDING, &priv->status);
6087         __iwl3945_down(priv);
6088
6089         /* tried to restart and config the device for as long as our
6090          * patience could withstand */
6091         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6092         return -EIO;
6093 }
6094
6095
6096 /*****************************************************************************
6097  *
6098  * Workqueue callbacks
6099  *
6100  *****************************************************************************/
6101
6102 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6103 {
6104         struct iwl3945_priv *priv =
6105             container_of(data, struct iwl3945_priv, init_alive_start.work);
6106
6107         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6108                 return;
6109
6110         mutex_lock(&priv->mutex);
6111         iwl3945_init_alive_start(priv);
6112         mutex_unlock(&priv->mutex);
6113 }
6114
6115 static void iwl3945_bg_alive_start(struct work_struct *data)
6116 {
6117         struct iwl3945_priv *priv =
6118             container_of(data, struct iwl3945_priv, alive_start.work);
6119
6120         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6121                 return;
6122
6123         mutex_lock(&priv->mutex);
6124         iwl3945_alive_start(priv);
6125         mutex_unlock(&priv->mutex);
6126 }
6127
6128 static void iwl3945_bg_rf_kill(struct work_struct *work)
6129 {
6130         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6131
6132         wake_up_interruptible(&priv->wait_command_queue);
6133
6134         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6135                 return;
6136
6137         mutex_lock(&priv->mutex);
6138
6139         if (!iwl3945_is_rfkill(priv)) {
6140                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6141                           "HW and/or SW RF Kill no longer active, restarting "
6142                           "device\n");
6143                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6144                         queue_work(priv->workqueue, &priv->restart);
6145         } else {
6146
6147                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6148                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6149                                           "disabled by SW switch\n");
6150                 else
6151                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6152                                     "Kill switch must be turned off for "
6153                                     "wireless networking to work.\n");
6154         }
6155         mutex_unlock(&priv->mutex);
6156 }
6157
6158 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6159
6160 static void iwl3945_bg_scan_check(struct work_struct *data)
6161 {
6162         struct iwl3945_priv *priv =
6163             container_of(data, struct iwl3945_priv, scan_check.work);
6164
6165         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6166                 return;
6167
6168         mutex_lock(&priv->mutex);
6169         if (test_bit(STATUS_SCANNING, &priv->status) ||
6170             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6171                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6172                           "Scan completion watchdog resetting adapter (%dms)\n",
6173                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6174
6175                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6176                         iwl3945_send_scan_abort(priv);
6177         }
6178         mutex_unlock(&priv->mutex);
6179 }
6180
6181 static void iwl3945_bg_request_scan(struct work_struct *data)
6182 {
6183         struct iwl3945_priv *priv =
6184             container_of(data, struct iwl3945_priv, request_scan);
6185         struct iwl3945_host_cmd cmd = {
6186                 .id = REPLY_SCAN_CMD,
6187                 .len = sizeof(struct iwl3945_scan_cmd),
6188                 .meta.flags = CMD_SIZE_HUGE,
6189         };
6190         int rc = 0;
6191         struct iwl3945_scan_cmd *scan;
6192         struct ieee80211_conf *conf = NULL;
6193         u8 direct_mask;
6194         enum ieee80211_band band;
6195
6196         conf = ieee80211_get_hw_conf(priv->hw);
6197
6198         mutex_lock(&priv->mutex);
6199
6200         if (!iwl3945_is_ready(priv)) {
6201                 IWL_WARNING("request scan called when driver not ready.\n");
6202                 goto done;
6203         }
6204
6205         /* Make sure the scan wasn't cancelled before this queued work
6206          * was given the chance to run... */
6207         if (!test_bit(STATUS_SCANNING, &priv->status))
6208                 goto done;
6209
6210         /* This should never be called or scheduled if there is currently
6211          * a scan active in the hardware. */
6212         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6213                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6214                                "Ignoring second request.\n");
6215                 rc = -EIO;
6216                 goto done;
6217         }
6218
6219         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6220                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6221                 goto done;
6222         }
6223
6224         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6225                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6226                 goto done;
6227         }
6228
6229         if (iwl3945_is_rfkill(priv)) {
6230                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6231                 goto done;
6232         }
6233
6234         if (!test_bit(STATUS_READY, &priv->status)) {
6235                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6236                 goto done;
6237         }
6238
6239         if (!priv->scan_bands) {
6240                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6241                 goto done;
6242         }
6243
6244         if (!priv->scan) {
6245                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6246                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6247                 if (!priv->scan) {
6248                         rc = -ENOMEM;
6249                         goto done;
6250                 }
6251         }
6252         scan = priv->scan;
6253         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6254
6255         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6256         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6257
6258         if (iwl3945_is_associated(priv)) {
6259                 u16 interval = 0;
6260                 u32 extra;
6261                 u32 suspend_time = 100;
6262                 u32 scan_suspend_time = 100;
6263                 unsigned long flags;
6264
6265                 IWL_DEBUG_INFO("Scanning while associated...\n");
6266
6267                 spin_lock_irqsave(&priv->lock, flags);
6268                 interval = priv->beacon_int;
6269                 spin_unlock_irqrestore(&priv->lock, flags);
6270
6271                 scan->suspend_time = 0;
6272                 scan->max_out_time = cpu_to_le32(200 * 1024);
6273                 if (!interval)
6274                         interval = suspend_time;
6275                 /*
6276                  * suspend time format:
6277                  *  0-19: beacon interval in usec (time before exec.)
6278                  * 20-23: 0
6279                  * 24-31: number of beacons (suspend between channels)
6280                  */
6281
6282                 extra = (suspend_time / interval) << 24;
6283                 scan_suspend_time = 0xFF0FFFFF &
6284                     (extra | ((suspend_time % interval) * 1024));
6285
6286                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6287                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6288                                scan_suspend_time, interval);
6289         }
6290
6291         /* We should add the ability for user to lock to PASSIVE ONLY */
6292         if (priv->one_direct_scan) {
6293                 IWL_DEBUG_SCAN
6294                     ("Kicking off one direct scan for '%s'\n",
6295                      iwl3945_escape_essid(priv->direct_ssid,
6296                                       priv->direct_ssid_len));
6297                 scan->direct_scan[0].id = WLAN_EID_SSID;
6298                 scan->direct_scan[0].len = priv->direct_ssid_len;
6299                 memcpy(scan->direct_scan[0].ssid,
6300                        priv->direct_ssid, priv->direct_ssid_len);
6301                 direct_mask = 1;
6302         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6303                 IWL_DEBUG_SCAN
6304                   ("Kicking off one direct scan for '%s' when not associated\n",
6305                    iwl3945_escape_essid(priv->essid, priv->essid_len));
6306                 scan->direct_scan[0].id = WLAN_EID_SSID;
6307                 scan->direct_scan[0].len = priv->essid_len;
6308                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6309                 direct_mask = 1;
6310         } else {
6311                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6312                 direct_mask = 0;
6313         }
6314
6315         /* We don't build a direct scan probe request; the uCode will do
6316          * that based on the direct_mask added to each channel entry */
6317         scan->tx_cmd.len = cpu_to_le16(
6318                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6319                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6320         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6321         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6322         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6323
6324         /* flags + rate selection */
6325
6326         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
6327                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6328                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6329                 scan->good_CRC_th = 0;
6330                 band = IEEE80211_BAND_2GHZ;
6331         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
6332                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6333                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6334                 band = IEEE80211_BAND_5GHZ;
6335         } else {
6336                 IWL_WARNING("Invalid scan band count\n");
6337                 goto done;
6338         }
6339
6340         /* select Rx antennas */
6341         scan->flags |= iwl3945_get_antenna_flags(priv);
6342
6343         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6344                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6345
6346         if (direct_mask)
6347                 scan->channel_count =
6348                         iwl3945_get_channels_for_scan(
6349                                 priv, band, 1, /* active */
6350                                 direct_mask,
6351                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6352         else
6353                 scan->channel_count =
6354                         iwl3945_get_channels_for_scan(
6355                                 priv, band, 0, /* passive */
6356                                 direct_mask,
6357                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6358
6359         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6360             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6361         cmd.data = scan;
6362         scan->len = cpu_to_le16(cmd.len);
6363
6364         set_bit(STATUS_SCAN_HW, &priv->status);
6365         rc = iwl3945_send_cmd_sync(priv, &cmd);
6366         if (rc)
6367                 goto done;
6368
6369         queue_delayed_work(priv->workqueue, &priv->scan_check,
6370                            IWL_SCAN_CHECK_WATCHDOG);
6371
6372         mutex_unlock(&priv->mutex);
6373         return;
6374
6375  done:
6376         /* inform mac80211 scan aborted */
6377         queue_work(priv->workqueue, &priv->scan_completed);
6378         mutex_unlock(&priv->mutex);
6379 }
6380
6381 static void iwl3945_bg_up(struct work_struct *data)
6382 {
6383         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6384
6385         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6386                 return;
6387
6388         mutex_lock(&priv->mutex);
6389         __iwl3945_up(priv);
6390         mutex_unlock(&priv->mutex);
6391 }
6392
6393 static void iwl3945_bg_restart(struct work_struct *data)
6394 {
6395         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6396
6397         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6398                 return;
6399
6400         iwl3945_down(priv);
6401         queue_work(priv->workqueue, &priv->up);
6402 }
6403
6404 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6405 {
6406         struct iwl3945_priv *priv =
6407             container_of(data, struct iwl3945_priv, rx_replenish);
6408
6409         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6410                 return;
6411
6412         mutex_lock(&priv->mutex);
6413         iwl3945_rx_replenish(priv);
6414         mutex_unlock(&priv->mutex);
6415 }
6416
6417 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6418
6419 static void iwl3945_bg_post_associate(struct work_struct *data)
6420 {
6421         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6422                                              post_associate.work);
6423
6424         int rc = 0;
6425         struct ieee80211_conf *conf = NULL;
6426         DECLARE_MAC_BUF(mac);
6427
6428         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6429                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6430                 return;
6431         }
6432
6433
6434         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6435                         priv->assoc_id,
6436                         print_mac(mac, priv->active_rxon.bssid_addr));
6437
6438         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6439                 return;
6440
6441         mutex_lock(&priv->mutex);
6442
6443         if (!priv->vif || !priv->is_open) {
6444                 mutex_unlock(&priv->mutex);
6445                 return;
6446         }
6447         iwl3945_scan_cancel_timeout(priv, 200);
6448
6449         conf = ieee80211_get_hw_conf(priv->hw);
6450
6451         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6452         iwl3945_commit_rxon(priv);
6453
6454         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6455         iwl3945_setup_rxon_timing(priv);
6456         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6457                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6458         if (rc)
6459                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6460                             "Attempting to continue.\n");
6461
6462         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6463
6464         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6465
6466         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6467                         priv->assoc_id, priv->beacon_int);
6468
6469         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6470                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6471         else
6472                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6473
6474         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6475                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6476                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6477                 else
6478                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6479
6480                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6481                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6482
6483         }
6484
6485         iwl3945_commit_rxon(priv);
6486
6487         switch (priv->iw_mode) {
6488         case IEEE80211_IF_TYPE_STA:
6489                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6490                 break;
6491
6492         case IEEE80211_IF_TYPE_IBSS:
6493
6494                 /* clear out the station table */
6495                 iwl3945_clear_stations_table(priv);
6496
6497                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6498                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6499                 iwl3945_sync_sta(priv, IWL_STA_ID,
6500                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6501                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6502                                  CMD_ASYNC);
6503                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6504                 iwl3945_send_beacon_cmd(priv);
6505
6506                 break;
6507
6508         default:
6509                  IWL_ERROR("%s Should not be called in %d mode\n",
6510                            __FUNCTION__, priv->iw_mode);
6511                 break;
6512         }
6513
6514         iwl3945_sequence_reset(priv);
6515
6516         iwl3945_activate_qos(priv, 0);
6517
6518         /* we have just associated, don't start scan too early */
6519         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6520         mutex_unlock(&priv->mutex);
6521 }
6522
6523 static void iwl3945_bg_abort_scan(struct work_struct *work)
6524 {
6525         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6526
6527         if (!iwl3945_is_ready(priv))
6528                 return;
6529
6530         mutex_lock(&priv->mutex);
6531
6532         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6533         iwl3945_send_scan_abort(priv);
6534
6535         mutex_unlock(&priv->mutex);
6536 }
6537
6538 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6539
6540 static void iwl3945_bg_scan_completed(struct work_struct *work)
6541 {
6542         struct iwl3945_priv *priv =
6543             container_of(work, struct iwl3945_priv, scan_completed);
6544
6545         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6546
6547         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6548                 return;
6549
6550         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6551                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6552
6553         ieee80211_scan_completed(priv->hw);
6554
6555         /* Since setting the TXPOWER may have been deferred while
6556          * performing the scan, fire one off */
6557         mutex_lock(&priv->mutex);
6558         iwl3945_hw_reg_send_txpower(priv);
6559         mutex_unlock(&priv->mutex);
6560 }
6561
6562 /*****************************************************************************
6563  *
6564  * mac80211 entry point functions
6565  *
6566  *****************************************************************************/
6567
6568 #define UCODE_READY_TIMEOUT     (2 * HZ)
6569
6570 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6571 {
6572         struct iwl3945_priv *priv = hw->priv;
6573         int ret;
6574
6575         IWL_DEBUG_MAC80211("enter\n");
6576
6577         if (pci_enable_device(priv->pci_dev)) {
6578                 IWL_ERROR("Fail to pci_enable_device\n");
6579                 return -ENODEV;
6580         }
6581         pci_restore_state(priv->pci_dev);
6582         pci_enable_msi(priv->pci_dev);
6583
6584         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6585                           DRV_NAME, priv);
6586         if (ret) {
6587                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6588                 goto out_disable_msi;
6589         }
6590
6591         /* we should be verifying the device is ready to be opened */
6592         mutex_lock(&priv->mutex);
6593
6594         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6595         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6596          * ucode filename and max sizes are card-specific. */
6597
6598         if (!priv->ucode_code.len) {
6599                 ret = iwl3945_read_ucode(priv);
6600                 if (ret) {
6601                         IWL_ERROR("Could not read microcode: %d\n", ret);
6602                         mutex_unlock(&priv->mutex);
6603                         goto out_release_irq;
6604                 }
6605         }
6606
6607         ret = __iwl3945_up(priv);
6608
6609         mutex_unlock(&priv->mutex);
6610
6611         if (ret)
6612                 goto out_release_irq;
6613
6614         IWL_DEBUG_INFO("Start UP work.\n");
6615
6616         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6617                 return 0;
6618
6619         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6620          * mac80211 will not be run successfully. */
6621         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6622                         test_bit(STATUS_READY, &priv->status),
6623                         UCODE_READY_TIMEOUT);
6624         if (!ret) {
6625                 if (!test_bit(STATUS_READY, &priv->status)) {
6626                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6627                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6628                         ret = -ETIMEDOUT;
6629                         goto out_release_irq;
6630                 }
6631         }
6632
6633         priv->is_open = 1;
6634         IWL_DEBUG_MAC80211("leave\n");
6635         return 0;
6636
6637 out_release_irq:
6638         free_irq(priv->pci_dev->irq, priv);
6639 out_disable_msi:
6640         pci_disable_msi(priv->pci_dev);
6641         pci_disable_device(priv->pci_dev);
6642         priv->is_open = 0;
6643         IWL_DEBUG_MAC80211("leave - failed\n");
6644         return ret;
6645 }
6646
6647 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6648 {
6649         struct iwl3945_priv *priv = hw->priv;
6650
6651         IWL_DEBUG_MAC80211("enter\n");
6652
6653         if (!priv->is_open) {
6654                 IWL_DEBUG_MAC80211("leave - skip\n");
6655                 return;
6656         }
6657
6658         priv->is_open = 0;
6659
6660         if (iwl3945_is_ready_rf(priv)) {
6661                 /* stop mac, cancel any scan request and clear
6662                  * RXON_FILTER_ASSOC_MSK BIT
6663                  */
6664                 mutex_lock(&priv->mutex);
6665                 iwl3945_scan_cancel_timeout(priv, 100);
6666                 cancel_delayed_work(&priv->post_associate);
6667                 mutex_unlock(&priv->mutex);
6668         }
6669
6670         iwl3945_down(priv);
6671
6672         flush_workqueue(priv->workqueue);
6673         free_irq(priv->pci_dev->irq, priv);
6674         pci_disable_msi(priv->pci_dev);
6675         pci_save_state(priv->pci_dev);
6676         pci_disable_device(priv->pci_dev);
6677
6678         IWL_DEBUG_MAC80211("leave\n");
6679 }
6680
6681 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6682                       struct ieee80211_tx_control *ctl)
6683 {
6684         struct iwl3945_priv *priv = hw->priv;
6685
6686         IWL_DEBUG_MAC80211("enter\n");
6687
6688         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6689                 IWL_DEBUG_MAC80211("leave - monitor\n");
6690                 dev_kfree_skb_any(skb);
6691                 return 0;
6692         }
6693
6694         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6695                      ctl->tx_rate->bitrate);
6696
6697         if (iwl3945_tx_skb(priv, skb, ctl))
6698                 dev_kfree_skb_any(skb);
6699
6700         IWL_DEBUG_MAC80211("leave\n");
6701         return 0;
6702 }
6703
6704 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6705                                  struct ieee80211_if_init_conf *conf)
6706 {
6707         struct iwl3945_priv *priv = hw->priv;
6708         unsigned long flags;
6709         DECLARE_MAC_BUF(mac);
6710
6711         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6712
6713         if (priv->vif) {
6714                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6715                 return -EOPNOTSUPP;
6716         }
6717
6718         spin_lock_irqsave(&priv->lock, flags);
6719         priv->vif = conf->vif;
6720
6721         spin_unlock_irqrestore(&priv->lock, flags);
6722
6723         mutex_lock(&priv->mutex);
6724
6725         if (conf->mac_addr) {
6726                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6727                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6728         }
6729
6730         if (iwl3945_is_ready(priv))
6731                 iwl3945_set_mode(priv, conf->type);
6732
6733         mutex_unlock(&priv->mutex);
6734
6735         IWL_DEBUG_MAC80211("leave\n");
6736         return 0;
6737 }
6738
6739 /**
6740  * iwl3945_mac_config - mac80211 config callback
6741  *
6742  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6743  * be set inappropriately and the driver currently sets the hardware up to
6744  * use it whenever needed.
6745  */
6746 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6747 {
6748         struct iwl3945_priv *priv = hw->priv;
6749         const struct iwl3945_channel_info *ch_info;
6750         unsigned long flags;
6751         int ret = 0;
6752
6753         mutex_lock(&priv->mutex);
6754         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6755
6756         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6757
6758         if (!iwl3945_is_ready(priv)) {
6759                 IWL_DEBUG_MAC80211("leave - not ready\n");
6760                 ret = -EIO;
6761                 goto out;
6762         }
6763
6764         if (unlikely(!iwl3945_param_disable_hw_scan &&
6765                      test_bit(STATUS_SCANNING, &priv->status))) {
6766                 IWL_DEBUG_MAC80211("leave - scanning\n");
6767                 set_bit(STATUS_CONF_PENDING, &priv->status);
6768                 mutex_unlock(&priv->mutex);
6769                 return 0;
6770         }
6771
6772         spin_lock_irqsave(&priv->lock, flags);
6773
6774         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6775                                            conf->channel->hw_value);
6776         if (!is_channel_valid(ch_info)) {
6777                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
6778                                conf->channel->hw_value, conf->channel->band);
6779                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6780                 spin_unlock_irqrestore(&priv->lock, flags);
6781                 ret = -EINVAL;
6782                 goto out;
6783         }
6784
6785         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6786
6787         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6788
6789         /* The list of supported rates and rate mask can be different
6790          * for each phymode; since the phymode may have changed, reset
6791          * the rate mask to what mac80211 lists */
6792         iwl3945_set_rate(priv);
6793
6794         spin_unlock_irqrestore(&priv->lock, flags);
6795
6796 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6797         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6798                 iwl3945_hw_channel_switch(priv, conf->channel);
6799                 goto out;
6800         }
6801 #endif
6802
6803         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6804
6805         if (!conf->radio_enabled) {
6806                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6807                 goto out;
6808         }
6809
6810         if (iwl3945_is_rfkill(priv)) {
6811                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6812                 ret = -EIO;
6813                 goto out;
6814         }
6815
6816         iwl3945_set_rate(priv);
6817
6818         if (memcmp(&priv->active_rxon,
6819                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6820                 iwl3945_commit_rxon(priv);
6821         else
6822                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6823
6824         IWL_DEBUG_MAC80211("leave\n");
6825
6826 out:
6827         clear_bit(STATUS_CONF_PENDING, &priv->status);
6828         mutex_unlock(&priv->mutex);
6829         return ret;
6830 }
6831
6832 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6833 {
6834         int rc = 0;
6835
6836         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6837                 return;
6838
6839         /* The following should be done only at AP bring up */
6840         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6841
6842                 /* RXON - unassoc (to set timing command) */
6843                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6844                 iwl3945_commit_rxon(priv);
6845
6846                 /* RXON Timing */
6847                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6848                 iwl3945_setup_rxon_timing(priv);
6849                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6850                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6851                 if (rc)
6852                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6853                                         "Attempting to continue.\n");
6854
6855                 /* FIXME: what should be the assoc_id for AP? */
6856                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6857                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6858                         priv->staging_rxon.flags |=
6859                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6860                 else
6861                         priv->staging_rxon.flags &=
6862                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6863
6864                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6865                         if (priv->assoc_capability &
6866                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6867                                 priv->staging_rxon.flags |=
6868                                         RXON_FLG_SHORT_SLOT_MSK;
6869                         else
6870                                 priv->staging_rxon.flags &=
6871                                         ~RXON_FLG_SHORT_SLOT_MSK;
6872
6873                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6874                                 priv->staging_rxon.flags &=
6875                                         ~RXON_FLG_SHORT_SLOT_MSK;
6876                 }
6877                 /* restore RXON assoc */
6878                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6879                 iwl3945_commit_rxon(priv);
6880                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6881         }
6882         iwl3945_send_beacon_cmd(priv);
6883
6884         /* FIXME - we need to add code here to detect a totally new
6885          * configuration, reset the AP, unassoc, rxon timing, assoc,
6886          * clear sta table, add BCAST sta... */
6887 }
6888
6889 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6890                                         struct ieee80211_vif *vif,
6891                                     struct ieee80211_if_conf *conf)
6892 {
6893         struct iwl3945_priv *priv = hw->priv;
6894         DECLARE_MAC_BUF(mac);
6895         unsigned long flags;
6896         int rc;
6897
6898         if (conf == NULL)
6899                 return -EIO;
6900
6901         if (priv->vif != vif) {
6902                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6903                 return 0;
6904         }
6905
6906         /* XXX: this MUST use conf->mac_addr */
6907
6908         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6909             (!conf->beacon || !conf->ssid_len)) {
6910                 IWL_DEBUG_MAC80211
6911                     ("Leaving in AP mode because HostAPD is not ready.\n");
6912                 return 0;
6913         }
6914
6915         if (!iwl3945_is_alive(priv))
6916                 return -EAGAIN;
6917
6918         mutex_lock(&priv->mutex);
6919
6920         if (conf->bssid)
6921                 IWL_DEBUG_MAC80211("bssid: %s\n",
6922                                    print_mac(mac, conf->bssid));
6923
6924 /*
6925  * very dubious code was here; the probe filtering flag is never set:
6926  *
6927         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6928             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6929  */
6930
6931         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6932                 if (!conf->bssid) {
6933                         conf->bssid = priv->mac_addr;
6934                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6935                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6936                                            print_mac(mac, conf->bssid));
6937                 }
6938                 if (priv->ibss_beacon)
6939                         dev_kfree_skb(priv->ibss_beacon);
6940
6941                 priv->ibss_beacon = conf->beacon;
6942         }
6943
6944         if (iwl3945_is_rfkill(priv))
6945                 goto done;
6946
6947         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6948             !is_multicast_ether_addr(conf->bssid)) {
6949                 /* If there is currently a HW scan going on in the background
6950                  * then we need to cancel it else the RXON below will fail. */
6951                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6952                         IWL_WARNING("Aborted scan still in progress "
6953                                     "after 100ms\n");
6954                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6955                         mutex_unlock(&priv->mutex);
6956                         return -EAGAIN;
6957                 }
6958                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6959
6960                 /* TODO: Audit driver for usage of these members and see
6961                  * if mac80211 deprecates them (priv->bssid looks like it
6962                  * shouldn't be there, but I haven't scanned the IBSS code
6963                  * to verify) - jpk */
6964                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6965
6966                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6967                         iwl3945_config_ap(priv);
6968                 else {
6969                         rc = iwl3945_commit_rxon(priv);
6970                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6971                                 iwl3945_add_station(priv,
6972                                         priv->active_rxon.bssid_addr, 1, 0);
6973                 }
6974
6975         } else {
6976                 iwl3945_scan_cancel_timeout(priv, 100);
6977                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6978                 iwl3945_commit_rxon(priv);
6979         }
6980
6981  done:
6982         spin_lock_irqsave(&priv->lock, flags);
6983         if (!conf->ssid_len)
6984                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6985         else
6986                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6987
6988         priv->essid_len = conf->ssid_len;
6989         spin_unlock_irqrestore(&priv->lock, flags);
6990
6991         IWL_DEBUG_MAC80211("leave\n");
6992         mutex_unlock(&priv->mutex);
6993
6994         return 0;
6995 }
6996
6997 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6998                                  unsigned int changed_flags,
6999                                  unsigned int *total_flags,
7000                                  int mc_count, struct dev_addr_list *mc_list)
7001 {
7002         /*
7003          * XXX: dummy
7004          * see also iwl3945_connection_init_rx_config
7005          */
7006         *total_flags = 0;
7007 }
7008
7009 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7010                                      struct ieee80211_if_init_conf *conf)
7011 {
7012         struct iwl3945_priv *priv = hw->priv;
7013
7014         IWL_DEBUG_MAC80211("enter\n");
7015
7016         mutex_lock(&priv->mutex);
7017
7018         if (iwl3945_is_ready_rf(priv)) {
7019                 iwl3945_scan_cancel_timeout(priv, 100);
7020                 cancel_delayed_work(&priv->post_associate);
7021                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7022                 iwl3945_commit_rxon(priv);
7023         }
7024         if (priv->vif == conf->vif) {
7025                 priv->vif = NULL;
7026                 memset(priv->bssid, 0, ETH_ALEN);
7027                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7028                 priv->essid_len = 0;
7029         }
7030         mutex_unlock(&priv->mutex);
7031
7032         IWL_DEBUG_MAC80211("leave\n");
7033 }
7034
7035 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7036 {
7037         int rc = 0;
7038         unsigned long flags;
7039         struct iwl3945_priv *priv = hw->priv;
7040
7041         IWL_DEBUG_MAC80211("enter\n");
7042
7043         mutex_lock(&priv->mutex);
7044         spin_lock_irqsave(&priv->lock, flags);
7045
7046         if (!iwl3945_is_ready_rf(priv)) {
7047                 rc = -EIO;
7048                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7049                 goto out_unlock;
7050         }
7051
7052         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7053                 rc = -EIO;
7054                 IWL_ERROR("ERROR: APs don't scan\n");
7055                 goto out_unlock;
7056         }
7057
7058         /* we don't schedule scan within next_scan_jiffies period */
7059         if (priv->next_scan_jiffies &&
7060                         time_after(priv->next_scan_jiffies, jiffies)) {
7061                 rc = -EAGAIN;
7062                 goto out_unlock;
7063         }
7064         /* if we just finished scan ask for delay */
7065         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7066                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7067                 rc = -EAGAIN;
7068                 goto out_unlock;
7069         }
7070         if (len) {
7071                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7072                                iwl3945_escape_essid(ssid, len), (int)len);
7073
7074                 priv->one_direct_scan = 1;
7075                 priv->direct_ssid_len = (u8)
7076                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7077                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7078         } else
7079                 priv->one_direct_scan = 0;
7080
7081         rc = iwl3945_scan_initiate(priv);
7082
7083         IWL_DEBUG_MAC80211("leave\n");
7084
7085 out_unlock:
7086         spin_unlock_irqrestore(&priv->lock, flags);
7087         mutex_unlock(&priv->mutex);
7088
7089         return rc;
7090 }
7091
7092 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7093                            const u8 *local_addr, const u8 *addr,
7094                            struct ieee80211_key_conf *key)
7095 {
7096         struct iwl3945_priv *priv = hw->priv;
7097         int rc = 0;
7098         u8 sta_id;
7099
7100         IWL_DEBUG_MAC80211("enter\n");
7101
7102         if (!iwl3945_param_hwcrypto) {
7103                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7104                 return -EOPNOTSUPP;
7105         }
7106
7107         if (is_zero_ether_addr(addr))
7108                 /* only support pairwise keys */
7109                 return -EOPNOTSUPP;
7110
7111         sta_id = iwl3945_hw_find_station(priv, addr);
7112         if (sta_id == IWL_INVALID_STATION) {
7113                 DECLARE_MAC_BUF(mac);
7114
7115                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7116                                    print_mac(mac, addr));
7117                 return -EINVAL;
7118         }
7119
7120         mutex_lock(&priv->mutex);
7121
7122         iwl3945_scan_cancel_timeout(priv, 100);
7123
7124         switch (cmd) {
7125         case  SET_KEY:
7126                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7127                 if (!rc) {
7128                         iwl3945_set_rxon_hwcrypto(priv, 1);
7129                         iwl3945_commit_rxon(priv);
7130                         key->hw_key_idx = sta_id;
7131                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7132                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7133                 }
7134                 break;
7135         case DISABLE_KEY:
7136                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7137                 if (!rc) {
7138                         iwl3945_set_rxon_hwcrypto(priv, 0);
7139                         iwl3945_commit_rxon(priv);
7140                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7141                 }
7142                 break;
7143         default:
7144                 rc = -EINVAL;
7145         }
7146
7147         IWL_DEBUG_MAC80211("leave\n");
7148         mutex_unlock(&priv->mutex);
7149
7150         return rc;
7151 }
7152
7153 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7154                            const struct ieee80211_tx_queue_params *params)
7155 {
7156         struct iwl3945_priv *priv = hw->priv;
7157         unsigned long flags;
7158         int q;
7159
7160         IWL_DEBUG_MAC80211("enter\n");
7161
7162         if (!iwl3945_is_ready_rf(priv)) {
7163                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7164                 return -EIO;
7165         }
7166
7167         if (queue >= AC_NUM) {
7168                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7169                 return 0;
7170         }
7171
7172         if (!priv->qos_data.qos_enable) {
7173                 priv->qos_data.qos_active = 0;
7174                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7175                 return 0;
7176         }
7177         q = AC_NUM - 1 - queue;
7178
7179         spin_lock_irqsave(&priv->lock, flags);
7180
7181         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7182         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7183         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7184         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7185                         cpu_to_le16((params->txop * 32));
7186
7187         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7188         priv->qos_data.qos_active = 1;
7189
7190         spin_unlock_irqrestore(&priv->lock, flags);
7191
7192         mutex_lock(&priv->mutex);
7193         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7194                 iwl3945_activate_qos(priv, 1);
7195         else if (priv->assoc_id && iwl3945_is_associated(priv))
7196                 iwl3945_activate_qos(priv, 0);
7197
7198         mutex_unlock(&priv->mutex);
7199
7200         IWL_DEBUG_MAC80211("leave\n");
7201         return 0;
7202 }
7203
7204 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7205                                 struct ieee80211_tx_queue_stats *stats)
7206 {
7207         struct iwl3945_priv *priv = hw->priv;
7208         int i, avail;
7209         struct iwl3945_tx_queue *txq;
7210         struct iwl3945_queue *q;
7211         unsigned long flags;
7212
7213         IWL_DEBUG_MAC80211("enter\n");
7214
7215         if (!iwl3945_is_ready_rf(priv)) {
7216                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7217                 return -EIO;
7218         }
7219
7220         spin_lock_irqsave(&priv->lock, flags);
7221
7222         for (i = 0; i < AC_NUM; i++) {
7223                 txq = &priv->txq[i];
7224                 q = &txq->q;
7225                 avail = iwl3945_queue_space(q);
7226
7227                 stats->data[i].len = q->n_window - avail;
7228                 stats->data[i].limit = q->n_window - q->high_mark;
7229                 stats->data[i].count = q->n_window;
7230
7231         }
7232         spin_unlock_irqrestore(&priv->lock, flags);
7233
7234         IWL_DEBUG_MAC80211("leave\n");
7235
7236         return 0;
7237 }
7238
7239 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7240                              struct ieee80211_low_level_stats *stats)
7241 {
7242         IWL_DEBUG_MAC80211("enter\n");
7243         IWL_DEBUG_MAC80211("leave\n");
7244
7245         return 0;
7246 }
7247
7248 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7249 {
7250         IWL_DEBUG_MAC80211("enter\n");
7251         IWL_DEBUG_MAC80211("leave\n");
7252
7253         return 0;
7254 }
7255
7256 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7257 {
7258         struct iwl3945_priv *priv = hw->priv;
7259         unsigned long flags;
7260
7261         mutex_lock(&priv->mutex);
7262         IWL_DEBUG_MAC80211("enter\n");
7263
7264         iwl3945_reset_qos(priv);
7265
7266         cancel_delayed_work(&priv->post_associate);
7267
7268         spin_lock_irqsave(&priv->lock, flags);
7269         priv->assoc_id = 0;
7270         priv->assoc_capability = 0;
7271         priv->call_post_assoc_from_beacon = 0;
7272
7273         /* new association get rid of ibss beacon skb */
7274         if (priv->ibss_beacon)
7275                 dev_kfree_skb(priv->ibss_beacon);
7276
7277         priv->ibss_beacon = NULL;
7278
7279         priv->beacon_int = priv->hw->conf.beacon_int;
7280         priv->timestamp1 = 0;
7281         priv->timestamp0 = 0;
7282         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7283                 priv->beacon_int = 0;
7284
7285         spin_unlock_irqrestore(&priv->lock, flags);
7286
7287         if (!iwl3945_is_ready_rf(priv)) {
7288                 IWL_DEBUG_MAC80211("leave - not ready\n");
7289                 mutex_unlock(&priv->mutex);
7290                 return;
7291         }
7292
7293         /* we are restarting association process
7294          * clear RXON_FILTER_ASSOC_MSK bit
7295         */
7296         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7297                 iwl3945_scan_cancel_timeout(priv, 100);
7298                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7299                 iwl3945_commit_rxon(priv);
7300         }
7301
7302         /* Per mac80211.h: This is only used in IBSS mode... */
7303         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7304
7305                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7306                 mutex_unlock(&priv->mutex);
7307                 return;
7308         }
7309
7310         iwl3945_set_rate(priv);
7311
7312         mutex_unlock(&priv->mutex);
7313
7314         IWL_DEBUG_MAC80211("leave\n");
7315
7316 }
7317
7318 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7319                                  struct ieee80211_tx_control *control)
7320 {
7321         struct iwl3945_priv *priv = hw->priv;
7322         unsigned long flags;
7323
7324         mutex_lock(&priv->mutex);
7325         IWL_DEBUG_MAC80211("enter\n");
7326
7327         if (!iwl3945_is_ready_rf(priv)) {
7328                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7329                 mutex_unlock(&priv->mutex);
7330                 return -EIO;
7331         }
7332
7333         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7334                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7335                 mutex_unlock(&priv->mutex);
7336                 return -EIO;
7337         }
7338
7339         spin_lock_irqsave(&priv->lock, flags);
7340
7341         if (priv->ibss_beacon)
7342                 dev_kfree_skb(priv->ibss_beacon);
7343
7344         priv->ibss_beacon = skb;
7345
7346         priv->assoc_id = 0;
7347
7348         IWL_DEBUG_MAC80211("leave\n");
7349         spin_unlock_irqrestore(&priv->lock, flags);
7350
7351         iwl3945_reset_qos(priv);
7352
7353         queue_work(priv->workqueue, &priv->post_associate.work);
7354
7355         mutex_unlock(&priv->mutex);
7356
7357         return 0;
7358 }
7359
7360 /*****************************************************************************
7361  *
7362  * sysfs attributes
7363  *
7364  *****************************************************************************/
7365
7366 #ifdef CONFIG_IWL3945_DEBUG
7367
7368 /*
7369  * The following adds a new attribute to the sysfs representation
7370  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7371  * used for controlling the debug level.
7372  *
7373  * See the level definitions in iwl for details.
7374  */
7375
7376 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7377 {
7378         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7379 }
7380 static ssize_t store_debug_level(struct device_driver *d,
7381                                  const char *buf, size_t count)
7382 {
7383         char *p = (char *)buf;
7384         u32 val;
7385
7386         val = simple_strtoul(p, &p, 0);
7387         if (p == buf)
7388                 printk(KERN_INFO DRV_NAME
7389                        ": %s is not in hex or decimal form.\n", buf);
7390         else
7391                 iwl3945_debug_level = val;
7392
7393         return strnlen(buf, count);
7394 }
7395
7396 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7397                    show_debug_level, store_debug_level);
7398
7399 #endif /* CONFIG_IWL3945_DEBUG */
7400
7401 static ssize_t show_rf_kill(struct device *d,
7402                             struct device_attribute *attr, char *buf)
7403 {
7404         /*
7405          * 0 - RF kill not enabled
7406          * 1 - SW based RF kill active (sysfs)
7407          * 2 - HW based RF kill active
7408          * 3 - Both HW and SW based RF kill active
7409          */
7410         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7411         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7412                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7413
7414         return sprintf(buf, "%i\n", val);
7415 }
7416
7417 static ssize_t store_rf_kill(struct device *d,
7418                              struct device_attribute *attr,
7419                              const char *buf, size_t count)
7420 {
7421         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7422
7423         mutex_lock(&priv->mutex);
7424         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7425         mutex_unlock(&priv->mutex);
7426
7427         return count;
7428 }
7429
7430 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7431
7432 static ssize_t show_temperature(struct device *d,
7433                                 struct device_attribute *attr, char *buf)
7434 {
7435         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7436
7437         if (!iwl3945_is_alive(priv))
7438                 return -EAGAIN;
7439
7440         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7441 }
7442
7443 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7444
7445 static ssize_t show_rs_window(struct device *d,
7446                               struct device_attribute *attr,
7447                               char *buf)
7448 {
7449         struct iwl3945_priv *priv = d->driver_data;
7450         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7451 }
7452 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7453
7454 static ssize_t show_tx_power(struct device *d,
7455                              struct device_attribute *attr, char *buf)
7456 {
7457         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7458         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7459 }
7460
7461 static ssize_t store_tx_power(struct device *d,
7462                               struct device_attribute *attr,
7463                               const char *buf, size_t count)
7464 {
7465         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7466         char *p = (char *)buf;
7467         u32 val;
7468
7469         val = simple_strtoul(p, &p, 10);
7470         if (p == buf)
7471                 printk(KERN_INFO DRV_NAME
7472                        ": %s is not in decimal form.\n", buf);
7473         else
7474                 iwl3945_hw_reg_set_txpower(priv, val);
7475
7476         return count;
7477 }
7478
7479 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7480
7481 static ssize_t show_flags(struct device *d,
7482                           struct device_attribute *attr, char *buf)
7483 {
7484         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7485
7486         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7487 }
7488
7489 static ssize_t store_flags(struct device *d,
7490                            struct device_attribute *attr,
7491                            const char *buf, size_t count)
7492 {
7493         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7494         u32 flags = simple_strtoul(buf, NULL, 0);
7495
7496         mutex_lock(&priv->mutex);
7497         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7498                 /* Cancel any currently running scans... */
7499                 if (iwl3945_scan_cancel_timeout(priv, 100))
7500                         IWL_WARNING("Could not cancel scan.\n");
7501                 else {
7502                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7503                                        flags);
7504                         priv->staging_rxon.flags = cpu_to_le32(flags);
7505                         iwl3945_commit_rxon(priv);
7506                 }
7507         }
7508         mutex_unlock(&priv->mutex);
7509
7510         return count;
7511 }
7512
7513 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7514
7515 static ssize_t show_filter_flags(struct device *d,
7516                                  struct device_attribute *attr, char *buf)
7517 {
7518         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7519
7520         return sprintf(buf, "0x%04X\n",
7521                 le32_to_cpu(priv->active_rxon.filter_flags));
7522 }
7523
7524 static ssize_t store_filter_flags(struct device *d,
7525                                   struct device_attribute *attr,
7526                                   const char *buf, size_t count)
7527 {
7528         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7529         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7530
7531         mutex_lock(&priv->mutex);
7532         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7533                 /* Cancel any currently running scans... */
7534                 if (iwl3945_scan_cancel_timeout(priv, 100))
7535                         IWL_WARNING("Could not cancel scan.\n");
7536                 else {
7537                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7538                                        "0x%04X\n", filter_flags);
7539                         priv->staging_rxon.filter_flags =
7540                                 cpu_to_le32(filter_flags);
7541                         iwl3945_commit_rxon(priv);
7542                 }
7543         }
7544         mutex_unlock(&priv->mutex);
7545
7546         return count;
7547 }
7548
7549 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7550                    store_filter_flags);
7551
7552 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7553
7554 static ssize_t show_measurement(struct device *d,
7555                                 struct device_attribute *attr, char *buf)
7556 {
7557         struct iwl3945_priv *priv = dev_get_drvdata(d);
7558         struct iwl3945_spectrum_notification measure_report;
7559         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7560         u8 *data = (u8 *) & measure_report;
7561         unsigned long flags;
7562
7563         spin_lock_irqsave(&priv->lock, flags);
7564         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7565                 spin_unlock_irqrestore(&priv->lock, flags);
7566                 return 0;
7567         }
7568         memcpy(&measure_report, &priv->measure_report, size);
7569         priv->measurement_status = 0;
7570         spin_unlock_irqrestore(&priv->lock, flags);
7571
7572         while (size && (PAGE_SIZE - len)) {
7573                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7574                                    PAGE_SIZE - len, 1);
7575                 len = strlen(buf);
7576                 if (PAGE_SIZE - len)
7577                         buf[len++] = '\n';
7578
7579                 ofs += 16;
7580                 size -= min(size, 16U);
7581         }
7582
7583         return len;
7584 }
7585
7586 static ssize_t store_measurement(struct device *d,
7587                                  struct device_attribute *attr,
7588                                  const char *buf, size_t count)
7589 {
7590         struct iwl3945_priv *priv = dev_get_drvdata(d);
7591         struct ieee80211_measurement_params params = {
7592                 .channel = le16_to_cpu(priv->active_rxon.channel),
7593                 .start_time = cpu_to_le64(priv->last_tsf),
7594                 .duration = cpu_to_le16(1),
7595         };
7596         u8 type = IWL_MEASURE_BASIC;
7597         u8 buffer[32];
7598         u8 channel;
7599
7600         if (count) {
7601                 char *p = buffer;
7602                 strncpy(buffer, buf, min(sizeof(buffer), count));
7603                 channel = simple_strtoul(p, NULL, 0);
7604                 if (channel)
7605                         params.channel = channel;
7606
7607                 p = buffer;
7608                 while (*p && *p != ' ')
7609                         p++;
7610                 if (*p)
7611                         type = simple_strtoul(p + 1, NULL, 0);
7612         }
7613
7614         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7615                        "channel %d (for '%s')\n", type, params.channel, buf);
7616         iwl3945_get_measurement(priv, &params, type);
7617
7618         return count;
7619 }
7620
7621 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7622                    show_measurement, store_measurement);
7623 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7624
7625 static ssize_t store_retry_rate(struct device *d,
7626                                 struct device_attribute *attr,
7627                                 const char *buf, size_t count)
7628 {
7629         struct iwl3945_priv *priv = dev_get_drvdata(d);
7630
7631         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7632         if (priv->retry_rate <= 0)
7633                 priv->retry_rate = 1;
7634
7635         return count;
7636 }
7637
7638 static ssize_t show_retry_rate(struct device *d,
7639                                struct device_attribute *attr, char *buf)
7640 {
7641         struct iwl3945_priv *priv = dev_get_drvdata(d);
7642         return sprintf(buf, "%d", priv->retry_rate);
7643 }
7644
7645 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7646                    store_retry_rate);
7647
7648 static ssize_t store_power_level(struct device *d,
7649                                  struct device_attribute *attr,
7650                                  const char *buf, size_t count)
7651 {
7652         struct iwl3945_priv *priv = dev_get_drvdata(d);
7653         int rc;
7654         int mode;
7655
7656         mode = simple_strtoul(buf, NULL, 0);
7657         mutex_lock(&priv->mutex);
7658
7659         if (!iwl3945_is_ready(priv)) {
7660                 rc = -EAGAIN;
7661                 goto out;
7662         }
7663
7664         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7665                 mode = IWL_POWER_AC;
7666         else
7667                 mode |= IWL_POWER_ENABLED;
7668
7669         if (mode != priv->power_mode) {
7670                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7671                 if (rc) {
7672                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7673                         goto out;
7674                 }
7675                 priv->power_mode = mode;
7676         }
7677
7678         rc = count;
7679
7680  out:
7681         mutex_unlock(&priv->mutex);
7682         return rc;
7683 }
7684
7685 #define MAX_WX_STRING 80
7686
7687 /* Values are in microsecond */
7688 static const s32 timeout_duration[] = {
7689         350000,
7690         250000,
7691         75000,
7692         37000,
7693         25000,
7694 };
7695 static const s32 period_duration[] = {
7696         400000,
7697         700000,
7698         1000000,
7699         1000000,
7700         1000000
7701 };
7702
7703 static ssize_t show_power_level(struct device *d,
7704                                 struct device_attribute *attr, char *buf)
7705 {
7706         struct iwl3945_priv *priv = dev_get_drvdata(d);
7707         int level = IWL_POWER_LEVEL(priv->power_mode);
7708         char *p = buf;
7709
7710         p += sprintf(p, "%d ", level);
7711         switch (level) {
7712         case IWL_POWER_MODE_CAM:
7713         case IWL_POWER_AC:
7714                 p += sprintf(p, "(AC)");
7715                 break;
7716         case IWL_POWER_BATTERY:
7717                 p += sprintf(p, "(BATTERY)");
7718                 break;
7719         default:
7720                 p += sprintf(p,
7721                              "(Timeout %dms, Period %dms)",
7722                              timeout_duration[level - 1] / 1000,
7723                              period_duration[level - 1] / 1000);
7724         }
7725
7726         if (!(priv->power_mode & IWL_POWER_ENABLED))
7727                 p += sprintf(p, " OFF\n");
7728         else
7729                 p += sprintf(p, " \n");
7730
7731         return (p - buf + 1);
7732
7733 }
7734
7735 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7736                    store_power_level);
7737
7738 static ssize_t show_channels(struct device *d,
7739                              struct device_attribute *attr, char *buf)
7740 {
7741         /* all this shit doesn't belong into sysfs anyway */
7742         return 0;
7743 }
7744
7745 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7746
7747 static ssize_t show_statistics(struct device *d,
7748                                struct device_attribute *attr, char *buf)
7749 {
7750         struct iwl3945_priv *priv = dev_get_drvdata(d);
7751         u32 size = sizeof(struct iwl3945_notif_statistics);
7752         u32 len = 0, ofs = 0;
7753         u8 *data = (u8 *) & priv->statistics;
7754         int rc = 0;
7755
7756         if (!iwl3945_is_alive(priv))
7757                 return -EAGAIN;
7758
7759         mutex_lock(&priv->mutex);
7760         rc = iwl3945_send_statistics_request(priv);
7761         mutex_unlock(&priv->mutex);
7762
7763         if (rc) {
7764                 len = sprintf(buf,
7765                               "Error sending statistics request: 0x%08X\n", rc);
7766                 return len;
7767         }
7768
7769         while (size && (PAGE_SIZE - len)) {
7770                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7771                                    PAGE_SIZE - len, 1);
7772                 len = strlen(buf);
7773                 if (PAGE_SIZE - len)
7774                         buf[len++] = '\n';
7775
7776                 ofs += 16;
7777                 size -= min(size, 16U);
7778         }
7779
7780         return len;
7781 }
7782
7783 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7784
7785 static ssize_t show_antenna(struct device *d,
7786                             struct device_attribute *attr, char *buf)
7787 {
7788         struct iwl3945_priv *priv = dev_get_drvdata(d);
7789
7790         if (!iwl3945_is_alive(priv))
7791                 return -EAGAIN;
7792
7793         return sprintf(buf, "%d\n", priv->antenna);
7794 }
7795
7796 static ssize_t store_antenna(struct device *d,
7797                              struct device_attribute *attr,
7798                              const char *buf, size_t count)
7799 {
7800         int ant;
7801         struct iwl3945_priv *priv = dev_get_drvdata(d);
7802
7803         if (count == 0)
7804                 return 0;
7805
7806         if (sscanf(buf, "%1i", &ant) != 1) {
7807                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7808                 return count;
7809         }
7810
7811         if ((ant >= 0) && (ant <= 2)) {
7812                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7813                 priv->antenna = (enum iwl3945_antenna)ant;
7814         } else
7815                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7816
7817
7818         return count;
7819 }
7820
7821 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7822
7823 static ssize_t show_status(struct device *d,
7824                            struct device_attribute *attr, char *buf)
7825 {
7826         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7827         if (!iwl3945_is_alive(priv))
7828                 return -EAGAIN;
7829         return sprintf(buf, "0x%08x\n", (int)priv->status);
7830 }
7831
7832 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7833
7834 static ssize_t dump_error_log(struct device *d,
7835                               struct device_attribute *attr,
7836                               const char *buf, size_t count)
7837 {
7838         char *p = (char *)buf;
7839
7840         if (p[0] == '1')
7841                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7842
7843         return strnlen(buf, count);
7844 }
7845
7846 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7847
7848 static ssize_t dump_event_log(struct device *d,
7849                               struct device_attribute *attr,
7850                               const char *buf, size_t count)
7851 {
7852         char *p = (char *)buf;
7853
7854         if (p[0] == '1')
7855                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7856
7857         return strnlen(buf, count);
7858 }
7859
7860 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7861
7862 /*****************************************************************************
7863  *
7864  * driver setup and teardown
7865  *
7866  *****************************************************************************/
7867
7868 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7869 {
7870         priv->workqueue = create_workqueue(DRV_NAME);
7871
7872         init_waitqueue_head(&priv->wait_command_queue);
7873
7874         INIT_WORK(&priv->up, iwl3945_bg_up);
7875         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7876         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7877         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7878         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7879         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7880         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7881         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7882         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
7883         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7884         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7885         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7886
7887         iwl3945_hw_setup_deferred_work(priv);
7888
7889         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7890                      iwl3945_irq_tasklet, (unsigned long)priv);
7891 }
7892
7893 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7894 {
7895         iwl3945_hw_cancel_deferred_work(priv);
7896
7897         cancel_delayed_work_sync(&priv->init_alive_start);
7898         cancel_delayed_work(&priv->scan_check);
7899         cancel_delayed_work(&priv->alive_start);
7900         cancel_delayed_work(&priv->post_associate);
7901         cancel_work_sync(&priv->beacon_update);
7902 }
7903
7904 static struct attribute *iwl3945_sysfs_entries[] = {
7905         &dev_attr_antenna.attr,
7906         &dev_attr_channels.attr,
7907         &dev_attr_dump_errors.attr,
7908         &dev_attr_dump_events.attr,
7909         &dev_attr_flags.attr,
7910         &dev_attr_filter_flags.attr,
7911 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7912         &dev_attr_measurement.attr,
7913 #endif
7914         &dev_attr_power_level.attr,
7915         &dev_attr_retry_rate.attr,
7916         &dev_attr_rf_kill.attr,
7917         &dev_attr_rs_window.attr,
7918         &dev_attr_statistics.attr,
7919         &dev_attr_status.attr,
7920         &dev_attr_temperature.attr,
7921         &dev_attr_tx_power.attr,
7922
7923         NULL
7924 };
7925
7926 static struct attribute_group iwl3945_attribute_group = {
7927         .name = NULL,           /* put in device directory */
7928         .attrs = iwl3945_sysfs_entries,
7929 };
7930
7931 static struct ieee80211_ops iwl3945_hw_ops = {
7932         .tx = iwl3945_mac_tx,
7933         .start = iwl3945_mac_start,
7934         .stop = iwl3945_mac_stop,
7935         .add_interface = iwl3945_mac_add_interface,
7936         .remove_interface = iwl3945_mac_remove_interface,
7937         .config = iwl3945_mac_config,
7938         .config_interface = iwl3945_mac_config_interface,
7939         .configure_filter = iwl3945_configure_filter,
7940         .set_key = iwl3945_mac_set_key,
7941         .get_stats = iwl3945_mac_get_stats,
7942         .get_tx_stats = iwl3945_mac_get_tx_stats,
7943         .conf_tx = iwl3945_mac_conf_tx,
7944         .get_tsf = iwl3945_mac_get_tsf,
7945         .reset_tsf = iwl3945_mac_reset_tsf,
7946         .beacon_update = iwl3945_mac_beacon_update,
7947         .hw_scan = iwl3945_mac_hw_scan
7948 };
7949
7950 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7951 {
7952         int err = 0;
7953         struct iwl3945_priv *priv;
7954         struct ieee80211_hw *hw;
7955         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7956         int i;
7957         unsigned long flags;
7958         DECLARE_MAC_BUF(mac);
7959
7960         /* Disabling hardware scan means that mac80211 will perform scans
7961          * "the hard way", rather than using device's scan. */
7962         if (iwl3945_param_disable_hw_scan) {
7963                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7964                 iwl3945_hw_ops.hw_scan = NULL;
7965         }
7966
7967         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7968             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7969                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7970                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7971                 err = -EINVAL;
7972                 goto out;
7973         }
7974
7975         /* mac80211 allocates memory for this device instance, including
7976          *   space for this driver's private structure */
7977         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7978         if (hw == NULL) {
7979                 IWL_ERROR("Can not allocate network device\n");
7980                 err = -ENOMEM;
7981                 goto out;
7982         }
7983         SET_IEEE80211_DEV(hw, &pdev->dev);
7984
7985         hw->rate_control_algorithm = "iwl-3945-rs";
7986
7987         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7988         priv = hw->priv;
7989         priv->hw = hw;
7990
7991         priv->pci_dev = pdev;
7992         priv->cfg = cfg;
7993
7994         /* Select antenna (may be helpful if only one antenna is connected) */
7995         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7996 #ifdef CONFIG_IWL3945_DEBUG
7997         iwl3945_debug_level = iwl3945_param_debug;
7998         atomic_set(&priv->restrict_refcnt, 0);
7999 #endif
8000         priv->retry_rate = 1;
8001
8002         priv->ibss_beacon = NULL;
8003
8004         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8005          *   the range of signal quality values that we'll provide.
8006          * Negative values for level/noise indicate that we'll provide dBm.
8007          * For WE, at least, non-0 values here *enable* display of values
8008          *   in app (iwconfig). */
8009         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8010         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8011         hw->max_signal = 100;   /* link quality indication (%) */
8012
8013         /* Tell mac80211 our Tx characteristics */
8014         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8015
8016         /* 4 EDCA QOS priorities */
8017         hw->queues = 4;
8018
8019         spin_lock_init(&priv->lock);
8020         spin_lock_init(&priv->power_data.lock);
8021         spin_lock_init(&priv->sta_lock);
8022         spin_lock_init(&priv->hcmd_lock);
8023
8024         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8025                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8026
8027         INIT_LIST_HEAD(&priv->free_frames);
8028
8029         mutex_init(&priv->mutex);
8030         if (pci_enable_device(pdev)) {
8031                 err = -ENODEV;
8032                 goto out_ieee80211_free_hw;
8033         }
8034
8035         pci_set_master(pdev);
8036
8037         /* Clear the driver's (not device's) station table */
8038         iwl3945_clear_stations_table(priv);
8039
8040         priv->data_retry_limit = -1;
8041         priv->ieee_channels = NULL;
8042         priv->ieee_rates = NULL;
8043         priv->band = IEEE80211_BAND_2GHZ;
8044
8045         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8046         if (!err)
8047                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8048         if (err) {
8049                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8050                 goto out_pci_disable_device;
8051         }
8052
8053         pci_set_drvdata(pdev, priv);
8054         err = pci_request_regions(pdev, DRV_NAME);
8055         if (err)
8056                 goto out_pci_disable_device;
8057
8058         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8059          * PCI Tx retries from interfering with C3 CPU state */
8060         pci_write_config_byte(pdev, 0x41, 0x00);
8061
8062         priv->hw_base = pci_iomap(pdev, 0, 0);
8063         if (!priv->hw_base) {
8064                 err = -ENODEV;
8065                 goto out_pci_release_regions;
8066         }
8067
8068         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8069                         (unsigned long long) pci_resource_len(pdev, 0));
8070         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8071
8072         /* Initialize module parameter values here */
8073
8074         /* Disable radio (SW RF KILL) via parameter when loading driver */
8075         if (iwl3945_param_disable) {
8076                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8077                 IWL_DEBUG_INFO("Radio disabled.\n");
8078         }
8079
8080         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8081
8082         printk(KERN_INFO DRV_NAME
8083                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8084
8085         /* Device-specific setup */
8086         if (iwl3945_hw_set_hw_setting(priv)) {
8087                 IWL_ERROR("failed to set hw settings\n");
8088                 goto out_iounmap;
8089         }
8090
8091         if (iwl3945_param_qos_enable)
8092                 priv->qos_data.qos_enable = 1;
8093
8094         iwl3945_reset_qos(priv);
8095
8096         priv->qos_data.qos_active = 0;
8097         priv->qos_data.qos_cap.val = 0;
8098
8099         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8100         iwl3945_setup_deferred_work(priv);
8101         iwl3945_setup_rx_handlers(priv);
8102
8103         priv->rates_mask = IWL_RATES_MASK;
8104         /* If power management is turned on, default to AC mode */
8105         priv->power_mode = IWL_POWER_AC;
8106         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8107
8108         spin_lock_irqsave(&priv->lock, flags);
8109         iwl3945_disable_interrupts(priv);
8110         spin_unlock_irqrestore(&priv->lock, flags);
8111
8112         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8113         if (err) {
8114                 IWL_ERROR("failed to create sysfs device attributes\n");
8115                 goto out_release_irq;
8116         }
8117
8118         /* nic init */
8119         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8120                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8121
8122         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8123         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8124                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8125                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8126         if (err < 0) {
8127                 IWL_DEBUG_INFO("Failed to init the card\n");
8128                 goto out_remove_sysfs;
8129         }
8130         /* Read the EEPROM */
8131         err = iwl3945_eeprom_init(priv);
8132         if (err) {
8133                 IWL_ERROR("Unable to init EEPROM\n");
8134                 goto out_remove_sysfs;
8135         }
8136         /* MAC Address location in EEPROM same for 3945/4965 */
8137         get_eeprom_mac(priv, priv->mac_addr);
8138         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8139         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8140
8141         err = iwl3945_init_channel_map(priv);
8142         if (err) {
8143                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8144                 goto out_remove_sysfs;
8145         }
8146
8147         err = iwl3945_init_geos(priv);
8148         if (err) {
8149                 IWL_ERROR("initializing geos failed: %d\n", err);
8150                 goto out_free_channel_map;
8151         }
8152
8153         err = ieee80211_register_hw(priv->hw);
8154         if (err) {
8155                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8156                 goto out_free_geos;
8157         }
8158
8159         priv->hw->conf.beacon_int = 100;
8160         priv->mac80211_registered = 1;
8161         pci_save_state(pdev);
8162         pci_disable_device(pdev);
8163
8164         return 0;
8165
8166  out_free_geos:
8167         iwl3945_free_geos(priv);
8168  out_free_channel_map:
8169         iwl3945_free_channel_map(priv);
8170  out_remove_sysfs:
8171         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8172
8173  out_release_irq:
8174         destroy_workqueue(priv->workqueue);
8175         priv->workqueue = NULL;
8176         iwl3945_unset_hw_setting(priv);
8177
8178  out_iounmap:
8179         pci_iounmap(pdev, priv->hw_base);
8180  out_pci_release_regions:
8181         pci_release_regions(pdev);
8182  out_pci_disable_device:
8183         pci_disable_device(pdev);
8184         pci_set_drvdata(pdev, NULL);
8185  out_ieee80211_free_hw:
8186         ieee80211_free_hw(priv->hw);
8187  out:
8188         return err;
8189 }
8190
8191 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8192 {
8193         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8194         struct list_head *p, *q;
8195         int i;
8196         unsigned long flags;
8197
8198         if (!priv)
8199                 return;
8200
8201         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8202
8203         set_bit(STATUS_EXIT_PENDING, &priv->status);
8204
8205         iwl3945_down(priv);
8206
8207         /* make sure we flush any pending irq or
8208          * tasklet for the driver
8209          */
8210         spin_lock_irqsave(&priv->lock, flags);
8211         iwl3945_disable_interrupts(priv);
8212         spin_unlock_irqrestore(&priv->lock, flags);
8213
8214         iwl_synchronize_irq(priv);
8215
8216         /* Free MAC hash list for ADHOC */
8217         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8218                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8219                         list_del(p);
8220                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8221                 }
8222         }
8223
8224         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8225
8226         iwl3945_dealloc_ucode_pci(priv);
8227
8228         if (priv->rxq.bd)
8229                 iwl3945_rx_queue_free(priv, &priv->rxq);
8230         iwl3945_hw_txq_ctx_free(priv);
8231
8232         iwl3945_unset_hw_setting(priv);
8233         iwl3945_clear_stations_table(priv);
8234
8235         if (priv->mac80211_registered) {
8236                 ieee80211_unregister_hw(priv->hw);
8237         }
8238
8239         /*netif_stop_queue(dev); */
8240         flush_workqueue(priv->workqueue);
8241
8242         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8243          * priv->workqueue... so we can't take down the workqueue
8244          * until now... */
8245         destroy_workqueue(priv->workqueue);
8246         priv->workqueue = NULL;
8247
8248         pci_iounmap(pdev, priv->hw_base);
8249         pci_release_regions(pdev);
8250         pci_disable_device(pdev);
8251         pci_set_drvdata(pdev, NULL);
8252
8253         iwl3945_free_channel_map(priv);
8254         iwl3945_free_geos(priv);
8255
8256         if (priv->ibss_beacon)
8257                 dev_kfree_skb(priv->ibss_beacon);
8258
8259         ieee80211_free_hw(priv->hw);
8260 }
8261
8262 #ifdef CONFIG_PM
8263
8264 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8265 {
8266         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8267
8268         if (priv->is_open) {
8269                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8270                 iwl3945_mac_stop(priv->hw);
8271                 priv->is_open = 1;
8272         }
8273
8274         pci_set_power_state(pdev, PCI_D3hot);
8275
8276         return 0;
8277 }
8278
8279 static int iwl3945_pci_resume(struct pci_dev *pdev)
8280 {
8281         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8282
8283         pci_set_power_state(pdev, PCI_D0);
8284
8285         if (priv->is_open)
8286                 iwl3945_mac_start(priv->hw);
8287
8288         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8289         return 0;
8290 }
8291
8292 #endif /* CONFIG_PM */
8293
8294 /*****************************************************************************
8295  *
8296  * driver and module entry point
8297  *
8298  *****************************************************************************/
8299
8300 static struct pci_driver iwl3945_driver = {
8301         .name = DRV_NAME,
8302         .id_table = iwl3945_hw_card_ids,
8303         .probe = iwl3945_pci_probe,
8304         .remove = __devexit_p(iwl3945_pci_remove),
8305 #ifdef CONFIG_PM
8306         .suspend = iwl3945_pci_suspend,
8307         .resume = iwl3945_pci_resume,
8308 #endif
8309 };
8310
8311 static int __init iwl3945_init(void)
8312 {
8313
8314         int ret;
8315         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8316         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8317
8318         ret = iwl3945_rate_control_register();
8319         if (ret) {
8320                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8321                 return ret;
8322         }
8323
8324         ret = pci_register_driver(&iwl3945_driver);
8325         if (ret) {
8326                 IWL_ERROR("Unable to initialize PCI module\n");
8327                 goto error_register;
8328         }
8329 #ifdef CONFIG_IWL3945_DEBUG
8330         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8331         if (ret) {
8332                 IWL_ERROR("Unable to create driver sysfs file\n");
8333                 goto error_debug;
8334         }
8335 #endif
8336
8337         return ret;
8338
8339 #ifdef CONFIG_IWL3945_DEBUG
8340 error_debug:
8341         pci_unregister_driver(&iwl3945_driver);
8342 #endif
8343 error_register:
8344         iwl3945_rate_control_unregister();
8345         return ret;
8346 }
8347
8348 static void __exit iwl3945_exit(void)
8349 {
8350 #ifdef CONFIG_IWL3945_DEBUG
8351         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8352 #endif
8353         pci_unregister_driver(&iwl3945_driver);
8354         iwl3945_rate_control_unregister();
8355 }
8356
8357 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8358 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8359 module_param_named(disable, iwl3945_param_disable, int, 0444);
8360 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8361 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8362 MODULE_PARM_DESC(hwcrypto,
8363                  "using hardware crypto engine (default 0 [software])\n");
8364 module_param_named(debug, iwl3945_param_debug, int, 0444);
8365 MODULE_PARM_DESC(debug, "debug output mask");
8366 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8367 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8368
8369 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8370 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8371
8372 /* QoS */
8373 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8374 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8375
8376 module_exit(iwl3945_exit);
8377 module_init(iwl3945_init);