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 const struct ieee80211_supported_band *iwl3945_get_band(
 106                 struct iwl3945_priv *priv, enum ieee80211_band band)
 107 {
 108         return priv->hw->wiphy->bands[band];
 109 }
 110
 111 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 112 {
 113         /* Single white space is for Linksys APs */
 114         if (essid_len == 1 && essid[0] == ' ')
 115                 return 1;
 116
 117         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 118         while (essid_len) {
 119                 essid_len--;
 120                 if (essid[essid_len] != '\0')
 121                         return 0;
 122         }
 123
 124         return 1;
 125 }
 126
 127 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 128 {
 129         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 130         const char *s = essid;
 131         char *d = escaped;
 132
 133         if (iwl3945_is_empty_essid(essid, essid_len)) {
 134                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 135                 return escaped;
 136         }
 137
 138         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 139         while (essid_len--) {
 140                 if (*s == '\0') {
 141                         *d++ = '\\';
 142                         *d++ = '0';
 143                         s++;
 144                 } else
 145                         *d++ = *s++;
 146         }
 147         *d = '\0';
 148         return escaped;
 149 }
 150
 151 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 152  * DMA services
 153  *
 154  * Theory of operation
 155  *
 156  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 157  * of buffer descriptors, each of which points to one or more data buffers for
 158  * the device to read from or fill.  Driver and device exchange status of each
 159  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 160  * entries in each circular buffer, to protect against confusing empty and full
 161  * queue states.
 162  *
 163  * The device reads or writes the data in the queues via the device's several
 164  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 165  *
 166  * For Tx queue, there are low mark and high mark limits. If, after queuing
 167  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 168  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 169  * Tx queue resumed.
 170  *
 171  * The 3945 operates with six queues:  One receive queue, one transmit queue
 172  * (#4) for sending commands to the device firmware, and four transmit queues
 173  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 174  ***************************************************/
 175
 176 int iwl3945_queue_space(const struct iwl3945_queue *q)
 177 {
 178         int s = q->read_ptr - q->write_ptr;
 179
 180         if (q->read_ptr > q->write_ptr)
 181                 s -= q->n_bd;
 182
 183         if (s <= 0)
 184                 s += q->n_window;
 185         /* keep some reserve to not confuse empty and full situations */
 186         s -= 2;
 187         if (s < 0)
 188                 s = 0;
 189         return s;
 190 }
 191
 192 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 193 {
 194         return q->write_ptr > q->read_ptr ?
 195                 (i >= q->read_ptr && i < q->write_ptr) :
 196                 !(i < q->read_ptr && i >= q->write_ptr);
 197 }
 198
 199
 200 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 201 {
 202         /* This is for scan command, the big buffer at end of command array */
 203         if (is_huge)
 204                 return q->n_window;     /* must be power of 2 */
 205
 206         /* Otherwise, use normal size buffers */
 207         return index & (q->n_window - 1);
 208 }
 209
 210 /**
 211  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 212  */
 213 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 214                           int count, int slots_num, u32 id)
 215 {
 216         q->n_bd = count;
 217         q->n_window = slots_num;
 218         q->id = id;
 219
 220         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 221          * and iwl_queue_dec_wrap are broken. */
 222         BUG_ON(!is_power_of_2(count));
 223
 224         /* slots_num must be power-of-two size, otherwise
 225          * get_cmd_index is broken. */
 226         BUG_ON(!is_power_of_2(slots_num));
 227
 228         q->low_mark = q->n_window / 4;
 229         if (q->low_mark < 4)
 230                 q->low_mark = 4;
 231
 232         q->high_mark = q->n_window / 8;
 233         if (q->high_mark < 2)
 234                 q->high_mark = 2;
 235
 236         q->write_ptr = q->read_ptr = 0;
 237
 238         return 0;
 239 }
 240
 241 /**
 242  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 243  */
 244 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 245                               struct iwl3945_tx_queue *txq, u32 id)
 246 {
 247         struct pci_dev *dev = priv->pci_dev;
 248
 249         /* Driver private data, only for Tx (not command) queues,
 250          * not shared with device. */
 251         if (id != IWL_CMD_QUEUE_NUM) {
 252                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 253                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 254                 if (!txq->txb) {
 255                         IWL_ERROR("kmalloc for auxiliary BD "
 256                                   "structures failed\n");
 257                         goto error;
 258                 }
 259         } else
 260                 txq->txb = NULL;
 261
 262         /* Circular buffer of transmit frame descriptors (TFDs),
 263          * shared with device */
 264         txq->bd = pci_alloc_consistent(dev,
 265                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 266                         &txq->q.dma_addr);
 267
 268         if (!txq->bd) {
 269                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 270                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 271                 goto error;
 272         }
 273         txq->q.id = id;
 274
 275         return 0;
 276
 277  error:
 278         if (txq->txb) {
 279                 kfree(txq->txb);
 280                 txq->txb = NULL;
 281         }
 282
 283         return -ENOMEM;
 284 }
 285
 286 /**
 287  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 288  */
 289 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 290                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 291 {
 292         struct pci_dev *dev = priv->pci_dev;
 293         int len;
 294         int rc = 0;
 295
 296         /*
 297          * Alloc buffer array for commands (Tx or other types of commands).
 298          * For the command queue (#4), allocate command space + one big
 299          * command for scan, since scan command is very huge; the system will
 300          * not have two scans at the same time, so only one is needed.
 301          * For data Tx queues (all other queues), no super-size command
 302          * space is needed.
 303          */
 304         len = sizeof(struct iwl3945_cmd) * slots_num;
 305         if (txq_id == IWL_CMD_QUEUE_NUM)
 306                 len +=  IWL_MAX_SCAN_SIZE;
 307         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 308         if (!txq->cmd)
 309                 return -ENOMEM;
 310
 311         /* Alloc driver data array and TFD circular buffer */
 312         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 313         if (rc) {
 314                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 315
 316                 return -ENOMEM;
 317         }
 318         txq->need_update = 0;
 319
 320         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 321          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 322         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 323
 324         /* Initialize queue high/low-water, head/tail indexes */
 325         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 326
 327         /* Tell device where to find queue, enable DMA channel. */
 328         iwl3945_hw_tx_queue_init(priv, txq);
 329
 330         return 0;
 331 }
 332
 333 /**
 334  * iwl3945_tx_queue_free - Deallocate DMA queue.
 335  * @txq: Transmit queue to deallocate.
 336  *
 337  * Empty queue by removing and destroying all BD's.
 338  * Free all buffers.
 339  * 0-fill, but do not free "txq" descriptor structure.
 340  */
 341 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 342 {
 343         struct iwl3945_queue *q = &txq->q;
 344         struct pci_dev *dev = priv->pci_dev;
 345         int len;
 346
 347         if (q->n_bd == 0)
 348                 return;
 349
 350         /* first, empty all BD's */
 351         for (; q->write_ptr != q->read_ptr;
 352              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 353                 iwl3945_hw_txq_free_tfd(priv, txq);
 354
 355         len = sizeof(struct iwl3945_cmd) * q->n_window;
 356         if (q->id == IWL_CMD_QUEUE_NUM)
 357                 len += IWL_MAX_SCAN_SIZE;
 358
 359         /* De-alloc array of command/tx buffers */
 360         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 361
 362         /* De-alloc circular buffer of TFDs */
 363         if (txq->q.n_bd)
 364                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 365                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 366
 367         /* De-alloc array of per-TFD driver data */
 368         if (txq->txb) {
 369                 kfree(txq->txb);
 370                 txq->txb = NULL;
 371         }
 372
 373         /* 0-fill queue descriptor structure */
 374         memset(txq, 0, sizeof(*txq));
 375 }
 376
 377 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 378
 379 /*************** STATION TABLE MANAGEMENT ****
 380  * mac80211 should be examined to determine if sta_info is duplicating
 381  * the functionality provided here
 382  */
 383
 384 /**************************************************************/
 385 #if 0 /* temporary disable till we add real remove station */
 386 /**
 387  * iwl3945_remove_station - Remove driver's knowledge of station.
 388  *
 389  * NOTE:  This does not remove station from device's station table.
 390  */
 391 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 392 {
 393         int index = IWL_INVALID_STATION;
 394         int i;
 395         unsigned long flags;
 396
 397         spin_lock_irqsave(&priv->sta_lock, flags);
 398
 399         if (is_ap)
 400                 index = IWL_AP_ID;
 401         else if (is_broadcast_ether_addr(addr))
 402                 index = priv->hw_setting.bcast_sta_id;
 403         else
 404                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 405                         if (priv->stations[i].used &&
 406                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 407                                                 addr)) {
 408                                 index = i;
 409                                 break;
 410                         }
 411
 412         if (unlikely(index == IWL_INVALID_STATION))
 413                 goto out;
 414
 415         if (priv->stations[index].used) {
 416                 priv->stations[index].used = 0;
 417                 priv->num_stations--;
 418         }
 419
 420         BUG_ON(priv->num_stations < 0);
 421
 422 out:
 423         spin_unlock_irqrestore(&priv->sta_lock, flags);
 424         return 0;
 425 }
 426 #endif
 427
 428 /**
 429  * iwl3945_clear_stations_table - Clear the driver's station table
 430  *
 431  * NOTE:  This does not clear or otherwise alter the device's station table.
 432  */
 433 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 434 {
 435         unsigned long flags;
 436
 437         spin_lock_irqsave(&priv->sta_lock, flags);
 438
 439         priv->num_stations = 0;
 440         memset(priv->stations, 0, sizeof(priv->stations));
 441
 442         spin_unlock_irqrestore(&priv->sta_lock, flags);
 443 }
 444
 445 /**
 446  * iwl3945_add_station - Add station to station tables in driver and device
 447  */
 448 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 449 {
 450         int i;
 451         int index = IWL_INVALID_STATION;
 452         struct iwl3945_station_entry *station;
 453         unsigned long flags_spin;
 454         DECLARE_MAC_BUF(mac);
 455         u8 rate;
 456
 457         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 458         if (is_ap)
 459                 index = IWL_AP_ID;
 460         else if (is_broadcast_ether_addr(addr))
 461                 index = priv->hw_setting.bcast_sta_id;
 462         else
 463                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 464                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 465                                                 addr)) {
 466                                 index = i;
 467                                 break;
 468                         }
 469
 470                         if (!priv->stations[i].used &&
 471                             index == IWL_INVALID_STATION)
 472                                 index = i;
 473                 }
 474
 475         /* These two conditions has the same outcome but keep them separate
 476           since they have different meaning */
 477         if (unlikely(index == IWL_INVALID_STATION)) {
 478                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 479                 return index;
 480         }
 481
 482         if (priv->stations[index].used &&
 483            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 484                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 485                 return index;
 486         }
 487
 488         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 489         station = &priv->stations[index];
 490         station->used = 1;
 491         priv->num_stations++;
 492
 493         /* Set up the REPLY_ADD_STA command to send to device */
 494         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 495         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 496         station->sta.mode = 0;
 497         station->sta.sta.sta_id = index;
 498         station->sta.station_flags = 0;
 499
 500         if (priv->band == IEEE80211_BAND_5GHZ)
 501                 rate = IWL_RATE_6M_PLCP;
 502         else
 503                 rate =  IWL_RATE_1M_PLCP;
 504
 505         /* Turn on both antennas for the station... */
 506         station->sta.rate_n_flags =
 507                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 508         station->current_rate.rate_n_flags =
 509                         le16_to_cpu(station->sta.rate_n_flags);
 510
 511         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 512
 513         /* Add station to device's station table */
 514         iwl3945_send_add_station(priv, &station->sta, flags);
 515         return index;
 516
 517 }
 518
 519 /*************** DRIVER STATUS FUNCTIONS   *****/
 520
 521 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 522 {
 523         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 524          * set but EXIT_PENDING is not */
 525         return test_bit(STATUS_READY, &priv->status) &&
 526                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 527                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 528 }
 529
 530 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 531 {
 532         return test_bit(STATUS_ALIVE, &priv->status);
 533 }
 534
 535 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 536 {
 537         return test_bit(STATUS_INIT, &priv->status);
 538 }
 539
 540 static inline int iwl3945_is_rfkill_sw(struct iwl3945_priv *priv)
 541 {
 542         return test_bit(STATUS_RF_KILL_SW, &priv->status);
 543 }
 544
 545 static inline int iwl3945_is_rfkill_hw(struct iwl3945_priv *priv)
 546 {
 547         return test_bit(STATUS_RF_KILL_HW, &priv->status);
 548 }
 549
 550 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 551 {
 552         return iwl3945_is_rfkill_hw(priv) ||
 553                 iwl3945_is_rfkill_sw(priv);
 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 (!(iwl3945_is_associated(priv)) ||
 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 /**
2039  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2040  *
2041  * NOTE: priv->mutex is not required before calling this function
2042  */
2043 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2044 {
2045         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2046                 clear_bit(STATUS_SCANNING, &priv->status);
2047                 return 0;
2048         }
2049
2050         if (test_bit(STATUS_SCANNING, &priv->status)) {
2051                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2052                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2053                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2054                         queue_work(priv->workqueue, &priv->abort_scan);
2055
2056                 } else
2057                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2058
2059                 return test_bit(STATUS_SCANNING, &priv->status);
2060         }
2061
2062         return 0;
2063 }
2064
2065 /**
2066  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2067  * @ms: amount of time to wait (in milliseconds) for scan to abort
2068  *
2069  * NOTE: priv->mutex must be held before calling this function
2070  */
2071 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2072 {
2073         unsigned long now = jiffies;
2074         int ret;
2075
2076         ret = iwl3945_scan_cancel(priv);
2077         if (ret && ms) {
2078                 mutex_unlock(&priv->mutex);
2079                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2080                                 test_bit(STATUS_SCANNING, &priv->status))
2081                         msleep(1);
2082                 mutex_lock(&priv->mutex);
2083
2084                 return test_bit(STATUS_SCANNING, &priv->status);
2085         }
2086
2087         return ret;
2088 }
2089
2090 #define MAX_UCODE_BEACON_INTERVAL       1024
2091 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2092
2093 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2094 {
2095         u16 new_val = 0;
2096         u16 beacon_factor = 0;
2097
2098         beacon_factor =
2099             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2100                 / MAX_UCODE_BEACON_INTERVAL;
2101         new_val = beacon_val / beacon_factor;
2102
2103         return cpu_to_le16(new_val);
2104 }
2105
2106 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2107 {
2108         u64 interval_tm_unit;
2109         u64 tsf, result;
2110         unsigned long flags;
2111         struct ieee80211_conf *conf = NULL;
2112         u16 beacon_int = 0;
2113
2114         conf = ieee80211_get_hw_conf(priv->hw);
2115
2116         spin_lock_irqsave(&priv->lock, flags);
2117         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2118         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2119
2120         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2121
2122         tsf = priv->timestamp1;
2123         tsf = ((tsf << 32) | priv->timestamp0);
2124
2125         beacon_int = priv->beacon_int;
2126         spin_unlock_irqrestore(&priv->lock, flags);
2127
2128         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2129                 if (beacon_int == 0) {
2130                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2131                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2132                 } else {
2133                         priv->rxon_timing.beacon_interval =
2134                                 cpu_to_le16(beacon_int);
2135                         priv->rxon_timing.beacon_interval =
2136                             iwl3945_adjust_beacon_interval(
2137                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2138                 }
2139
2140                 priv->rxon_timing.atim_window = 0;
2141         } else {
2142                 priv->rxon_timing.beacon_interval =
2143                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2144                 /* TODO: we need to get atim_window from upper stack
2145                  * for now we set to 0 */
2146                 priv->rxon_timing.atim_window = 0;
2147         }
2148
2149         interval_tm_unit =
2150                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2151         result = do_div(tsf, interval_tm_unit);
2152         priv->rxon_timing.beacon_init_val =
2153             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2154
2155         IWL_DEBUG_ASSOC
2156             ("beacon interval %d beacon timer %d beacon tim %d\n",
2157                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2158                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2159                 le16_to_cpu(priv->rxon_timing.atim_window));
2160 }
2161
2162 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2163 {
2164         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2165                 IWL_ERROR("APs don't scan.\n");
2166                 return 0;
2167         }
2168
2169         if (!iwl3945_is_ready_rf(priv)) {
2170                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2171                 return -EIO;
2172         }
2173
2174         if (test_bit(STATUS_SCANNING, &priv->status)) {
2175                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2176                 return -EAGAIN;
2177         }
2178
2179         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2180                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2181                                "Queuing.\n");
2182                 return -EAGAIN;
2183         }
2184
2185         IWL_DEBUG_INFO("Starting scan...\n");
2186         if (priv->cfg->sku & IWL_SKU_G)
2187                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
2188         if (priv->cfg->sku & IWL_SKU_A)
2189                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
2190         set_bit(STATUS_SCANNING, &priv->status);
2191         priv->scan_start = jiffies;
2192         priv->scan_pass_start = priv->scan_start;
2193
2194         queue_work(priv->workqueue, &priv->request_scan);
2195
2196         return 0;
2197 }
2198
2199 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2200 {
2201         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2202
2203         if (hw_decrypt)
2204                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2205         else
2206                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2207
2208         return 0;
2209 }
2210
2211 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2212                                           enum ieee80211_band band)
2213 {
2214         if (band == IEEE80211_BAND_5GHZ) {
2215                 priv->staging_rxon.flags &=
2216                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2217                       | RXON_FLG_CCK_MSK);
2218                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2219         } else {
2220                 /* Copied from iwl3945_bg_post_associate() */
2221                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2222                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2223                 else
2224                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2225
2226                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2227                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2228
2229                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2230                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2231                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2232         }
2233 }
2234
2235 /*
2236  * initialize rxon structure with default values from eeprom
2237  */
2238 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2239 {
2240         const struct iwl3945_channel_info *ch_info;
2241
2242         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2243
2244         switch (priv->iw_mode) {
2245         case IEEE80211_IF_TYPE_AP:
2246                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2247                 break;
2248
2249         case IEEE80211_IF_TYPE_STA:
2250                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2251                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2252                 break;
2253
2254         case IEEE80211_IF_TYPE_IBSS:
2255                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2256                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2257                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2258                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2259                 break;
2260
2261         case IEEE80211_IF_TYPE_MNTR:
2262                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2263                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2264                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2265                 break;
2266         default:
2267                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
2268                 break;
2269         }
2270
2271 #if 0
2272         /* TODO:  Figure out when short_preamble would be set and cache from
2273          * that */
2274         if (!hw_to_local(priv->hw)->short_preamble)
2275                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2276         else
2277                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2278 #endif
2279
2280         ch_info = iwl3945_get_channel_info(priv, priv->band,
2281                                        le16_to_cpu(priv->active_rxon.channel));
2282
2283         if (!ch_info)
2284                 ch_info = &priv->channel_info[0];
2285
2286         /*
2287          * in some case A channels are all non IBSS
2288          * in this case force B/G channel
2289          */
2290         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2291             !(is_channel_ibss(ch_info)))
2292                 ch_info = &priv->channel_info[0];
2293
2294         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2295         if (is_channel_a_band(ch_info))
2296                 priv->band = IEEE80211_BAND_5GHZ;
2297         else
2298                 priv->band = IEEE80211_BAND_2GHZ;
2299
2300         iwl3945_set_flags_for_phymode(priv, priv->band);
2301
2302         priv->staging_rxon.ofdm_basic_rates =
2303             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2304         priv->staging_rxon.cck_basic_rates =
2305             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2306 }
2307
2308 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2309 {
2310         if (mode == IEEE80211_IF_TYPE_IBSS) {
2311                 const struct iwl3945_channel_info *ch_info;
2312
2313                 ch_info = iwl3945_get_channel_info(priv,
2314                         priv->band,
2315                         le16_to_cpu(priv->staging_rxon.channel));
2316
2317                 if (!ch_info || !is_channel_ibss(ch_info)) {
2318                         IWL_ERROR("channel %d not IBSS channel\n",
2319                                   le16_to_cpu(priv->staging_rxon.channel));
2320                         return -EINVAL;
2321                 }
2322         }
2323
2324         priv->iw_mode = mode;
2325
2326         iwl3945_connection_init_rx_config(priv);
2327         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2328
2329         iwl3945_clear_stations_table(priv);
2330
2331         /* dont commit rxon if rf-kill is on*/
2332         if (!iwl3945_is_ready_rf(priv))
2333                 return -EAGAIN;
2334
2335         cancel_delayed_work(&priv->scan_check);
2336         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2337                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2338                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2339                 return -EAGAIN;
2340         }
2341
2342         iwl3945_commit_rxon(priv);
2343
2344         return 0;
2345 }
2346
2347 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2348                                       struct ieee80211_tx_info *info,
2349                                       struct iwl3945_cmd *cmd,
2350                                       struct sk_buff *skb_frag,
2351                                       int last_frag)
2352 {
2353         struct iwl3945_hw_key *keyinfo =
2354             &priv->stations[info->control.hw_key->hw_key_idx].keyinfo;
2355
2356         switch (keyinfo->alg) {
2357         case ALG_CCMP:
2358                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2359                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2360                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2361                 break;
2362
2363         case ALG_TKIP:
2364 #if 0
2365                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2366
2367                 if (last_frag)
2368                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2369                                8);
2370                 else
2371                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2372 #endif
2373                 break;
2374
2375         case ALG_WEP:
2376                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2377                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2378
2379                 if (keyinfo->keylen == 13)
2380                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2381
2382                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2383
2384                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2385                              "with key %d\n", info->control.hw_key->hw_key_idx);
2386                 break;
2387
2388         default:
2389                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2390                 break;
2391         }
2392 }
2393
2394 /*
2395  * handle build REPLY_TX command notification.
2396  */
2397 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2398                                   struct iwl3945_cmd *cmd,
2399                                   struct ieee80211_tx_info *info,
2400                                   struct ieee80211_hdr *hdr,
2401                                   int is_unicast, u8 std_id)
2402 {
2403         __le16 fc = hdr->frame_control;
2404         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2405
2406         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2407         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
2408                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2409                 if (ieee80211_is_mgmt(fc))
2410                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2411                 if (ieee80211_is_probe_resp(fc) &&
2412                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2413                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2414         } else {
2415                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2416                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2417         }
2418
2419         cmd->cmd.tx.sta_id = std_id;
2420         if (ieee80211_has_morefrags(fc))
2421                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2422
2423         if (ieee80211_is_data_qos(fc)) {
2424                 u8 *qc = ieee80211_get_qos_ctl(hdr);
2425                 cmd->cmd.tx.tid_tspec = qc[0] & 0xf;
2426                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2427         } else {
2428                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2429         }
2430
2431         if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
2432                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2433                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2434         } else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
2435                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2436                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2437         }
2438
2439         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2440                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2441
2442         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2443         if (ieee80211_is_mgmt(fc)) {
2444                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
2445                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2446                 else
2447                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2448         } else {
2449                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2450 #ifdef CONFIG_IWL3945_LEDS
2451                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2452 #endif
2453         }
2454
2455         cmd->cmd.tx.driver_txop = 0;
2456         cmd->cmd.tx.tx_flags = tx_flags;
2457         cmd->cmd.tx.next_frame_len = 0;
2458 }
2459
2460 /**
2461  * iwl3945_get_sta_id - Find station's index within station table
2462  */
2463 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2464 {
2465         int sta_id;
2466         u16 fc = le16_to_cpu(hdr->frame_control);
2467
2468         /* If this frame is broadcast or management, use broadcast station id */
2469         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2470             is_multicast_ether_addr(hdr->addr1))
2471                 return priv->hw_setting.bcast_sta_id;
2472
2473         switch (priv->iw_mode) {
2474
2475         /* If we are a client station in a BSS network, use the special
2476          * AP station entry (that's the only station we communicate with) */
2477         case IEEE80211_IF_TYPE_STA:
2478                 return IWL_AP_ID;
2479
2480         /* If we are an AP, then find the station, or use BCAST */
2481         case IEEE80211_IF_TYPE_AP:
2482                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2483                 if (sta_id != IWL_INVALID_STATION)
2484                         return sta_id;
2485                 return priv->hw_setting.bcast_sta_id;
2486
2487         /* If this frame is going out to an IBSS network, find the station,
2488          * or create a new station table entry */
2489         case IEEE80211_IF_TYPE_IBSS: {
2490                 DECLARE_MAC_BUF(mac);
2491
2492                 /* Create new station table entry */
2493                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2494                 if (sta_id != IWL_INVALID_STATION)
2495                         return sta_id;
2496
2497                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2498
2499                 if (sta_id != IWL_INVALID_STATION)
2500                         return sta_id;
2501
2502                 IWL_DEBUG_DROP("Station %s not in station map. "
2503                                "Defaulting to broadcast...\n",
2504                                print_mac(mac, hdr->addr1));
2505                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2506                 return priv->hw_setting.bcast_sta_id;
2507         }
2508         /* If we are in monitor mode, use BCAST. This is required for
2509          * packet injection. */
2510         case IEEE80211_IF_TYPE_MNTR:
2511                 return priv->hw_setting.bcast_sta_id;
2512
2513         default:
2514                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2515                 return priv->hw_setting.bcast_sta_id;
2516         }
2517 }
2518
2519 /*
2520  * start REPLY_TX command process
2521  */
2522 static int iwl3945_tx_skb(struct iwl3945_priv *priv, struct sk_buff *skb)
2523 {
2524         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2525         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2526         struct iwl3945_tfd_frame *tfd;
2527         u32 *control_flags;
2528         int txq_id = skb_get_queue_mapping(skb);
2529         struct iwl3945_tx_queue *txq = NULL;
2530         struct iwl3945_queue *q = NULL;
2531         dma_addr_t phys_addr;
2532         dma_addr_t txcmd_phys;
2533         struct iwl3945_cmd *out_cmd = NULL;
2534         u16 len, idx, len_org, hdr_len;
2535         u8 id;
2536         u8 unicast;
2537         u8 sta_id;
2538         u8 tid = 0;
2539         u16 seq_number = 0;
2540         __le16 fc;
2541         u8 wait_write_ptr = 0;
2542         u8 *qc = NULL;
2543         unsigned long flags;
2544         int rc;
2545
2546         spin_lock_irqsave(&priv->lock, flags);
2547         if (iwl3945_is_rfkill(priv)) {
2548                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2549                 goto drop_unlock;
2550         }
2551
2552         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
2553                 IWL_ERROR("ERROR: No TX rate available.\n");
2554                 goto drop_unlock;
2555         }
2556
2557         unicast = !is_multicast_ether_addr(hdr->addr1);
2558         id = 0;
2559
2560         fc = hdr->frame_control;
2561
2562 #ifdef CONFIG_IWL3945_DEBUG
2563         if (ieee80211_is_auth(fc))
2564                 IWL_DEBUG_TX("Sending AUTH frame\n");
2565         else if (ieee80211_is_assoc_req(fc))
2566                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2567         else if (ieee80211_is_reassoc_req(fc))
2568                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2569 #endif
2570
2571         /* drop all data frame if we are not associated */
2572         if (ieee80211_is_data(fc) &&
2573             (priv->iw_mode != IEEE80211_IF_TYPE_MNTR) && /* packet injection */
2574             (!iwl3945_is_associated(priv) ||
2575              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id))) {
2576                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2577                 goto drop_unlock;
2578         }
2579
2580         spin_unlock_irqrestore(&priv->lock, flags);
2581
2582         hdr_len = ieee80211_get_hdrlen(le16_to_cpu(fc));
2583
2584         /* Find (or create) index into station table for destination station */
2585         sta_id = iwl3945_get_sta_id(priv, hdr);
2586         if (sta_id == IWL_INVALID_STATION) {
2587                 DECLARE_MAC_BUF(mac);
2588
2589                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2590                                print_mac(mac, hdr->addr1));
2591                 goto drop;
2592         }
2593
2594         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2595
2596         if (ieee80211_is_data_qos(fc)) {
2597                 qc = ieee80211_get_qos_ctl(hdr);
2598                 tid = qc[0] & 0xf;
2599                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2600                                 IEEE80211_SCTL_SEQ;
2601                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2602                         (hdr->seq_ctrl &
2603                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2604                 seq_number += 0x10;
2605         }
2606
2607         /* Descriptor for chosen Tx queue */
2608         txq = &priv->txq[txq_id];
2609         q = &txq->q;
2610
2611         spin_lock_irqsave(&priv->lock, flags);
2612
2613         /* Set up first empty TFD within this queue's circular TFD buffer */
2614         tfd = &txq->bd[q->write_ptr];
2615         memset(tfd, 0, sizeof(*tfd));
2616         control_flags = (u32 *) tfd;
2617         idx = get_cmd_index(q, q->write_ptr, 0);
2618
2619         /* Set up driver data for this TFD */
2620         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2621         txq->txb[q->write_ptr].skb[0] = skb;
2622
2623         /* Init first empty entry in queue's array of Tx/cmd buffers */
2624         out_cmd = &txq->cmd[idx];
2625         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2626         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2627
2628         /*
2629          * Set up the Tx-command (not MAC!) header.
2630          * Store the chosen Tx queue and TFD index within the sequence field;
2631          * after Tx, uCode's Tx response will return this value so driver can
2632          * locate the frame within the tx queue and do post-tx processing.
2633          */
2634         out_cmd->hdr.cmd = REPLY_TX;
2635         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2636                                 INDEX_TO_SEQ(q->write_ptr)));
2637
2638         /* Copy MAC header from skb into command buffer */
2639         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2640
2641         /*
2642          * Use the first empty entry in this queue's command buffer array
2643          * to contain the Tx command and MAC header concatenated together
2644          * (payload data will be in another buffer).
2645          * Size of this varies, due to varying MAC header length.
2646          * If end is not dword aligned, we'll have 2 extra bytes at the end
2647          * of the MAC header (device reads on dword boundaries).
2648          * We'll tell device about this padding later.
2649          */
2650         len = priv->hw_setting.tx_cmd_len +
2651                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2652
2653         len_org = len;
2654         len = (len + 3) & ~3;
2655
2656         if (len_org != len)
2657                 len_org = 1;
2658         else
2659                 len_org = 0;
2660
2661         /* Physical address of this Tx command's header (not MAC header!),
2662          * within command buffer array. */
2663         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2664                      offsetof(struct iwl3945_cmd, hdr);
2665
2666         /* Add buffer containing Tx command and MAC(!) header to TFD's
2667          * first entry */
2668         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2669
2670         if (info->control.hw_key)
2671                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
2672
2673         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2674          * if any (802.11 null frames have no payload). */
2675         len = skb->len - hdr_len;
2676         if (len) {
2677                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2678                                            len, PCI_DMA_TODEVICE);
2679                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2680         }
2681
2682         if (!len)
2683                 /* If there is no payload, then we use only one Tx buffer */
2684                 *control_flags = TFD_CTL_COUNT_SET(1);
2685         else
2686                 /* Else use 2 buffers.
2687                  * Tell 3945 about any padding after MAC header */
2688                 *control_flags = TFD_CTL_COUNT_SET(2) |
2689                         TFD_CTL_PAD_SET(U32_PAD(len));
2690
2691         /* Total # bytes to be transmitted */
2692         len = (u16)skb->len;
2693         out_cmd->cmd.tx.len = cpu_to_le16(len);
2694
2695         /* TODO need this for burst mode later on */
2696         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, unicast, sta_id);
2697
2698         /* set is_hcca to 0; it probably will never be implemented */
2699         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
2700
2701         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2702         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2703
2704         if (!ieee80211_has_morefrags(hdr->frame_control)) {
2705                 txq->need_update = 1;
2706                 if (qc) {
2707                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2708                 }
2709         } else {
2710                 wait_write_ptr = 1;
2711                 txq->need_update = 0;
2712         }
2713
2714         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2715                            sizeof(out_cmd->cmd.tx));
2716
2717         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2718                            ieee80211_get_hdrlen(le16_to_cpu(fc)));
2719
2720         /* Tell device the write index *just past* this latest filled TFD */
2721         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2722         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2723         spin_unlock_irqrestore(&priv->lock, flags);
2724
2725         if (rc)
2726                 return rc;
2727
2728         if ((iwl3945_queue_space(q) < q->high_mark)
2729             && priv->mac80211_registered) {
2730                 if (wait_write_ptr) {
2731                         spin_lock_irqsave(&priv->lock, flags);
2732                         txq->need_update = 1;
2733                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2734                         spin_unlock_irqrestore(&priv->lock, flags);
2735                 }
2736
2737                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
2738         }
2739
2740         return 0;
2741
2742 drop_unlock:
2743         spin_unlock_irqrestore(&priv->lock, flags);
2744 drop:
2745         return -1;
2746 }
2747
2748 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2749 {
2750         const struct ieee80211_supported_band *sband = NULL;
2751         struct ieee80211_rate *rate;
2752         int i;
2753
2754         sband = iwl3945_get_band(priv, priv->band);
2755         if (!sband) {
2756                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2757                 return;
2758         }
2759
2760         priv->active_rate = 0;
2761         priv->active_rate_basic = 0;
2762
2763         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2764                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2765
2766         for (i = 0; i < sband->n_bitrates; i++) {
2767                 rate = &sband->bitrates[i];
2768                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2769                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2770                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2771                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2772                         priv->active_rate |= (1 << rate->hw_value);
2773                 }
2774         }
2775
2776         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2777                        priv->active_rate, priv->active_rate_basic);
2778
2779         /*
2780          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2781          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2782          * OFDM
2783          */
2784         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2785                 priv->staging_rxon.cck_basic_rates =
2786                     ((priv->active_rate_basic &
2787                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2788         else
2789                 priv->staging_rxon.cck_basic_rates =
2790                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2791
2792         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2793                 priv->staging_rxon.ofdm_basic_rates =
2794                     ((priv->active_rate_basic &
2795                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2796                       IWL_FIRST_OFDM_RATE) & 0xFF;
2797         else
2798                 priv->staging_rxon.ofdm_basic_rates =
2799                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2800 }
2801
2802 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2803 {
2804         unsigned long flags;
2805
2806         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2807                 return;
2808
2809         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2810                           disable_radio ? "OFF" : "ON");
2811
2812         if (disable_radio) {
2813                 iwl3945_scan_cancel(priv);
2814                 /* FIXME: This is a workaround for AP */
2815                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2816                         spin_lock_irqsave(&priv->lock, flags);
2817                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2818                                     CSR_UCODE_SW_BIT_RFKILL);
2819                         spin_unlock_irqrestore(&priv->lock, flags);
2820                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2821                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2822                 }
2823                 return;
2824         }
2825
2826         spin_lock_irqsave(&priv->lock, flags);
2827         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2828
2829         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2830         spin_unlock_irqrestore(&priv->lock, flags);
2831
2832         /* wake up ucode */
2833         msleep(10);
2834
2835         spin_lock_irqsave(&priv->lock, flags);
2836         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2837         if (!iwl3945_grab_nic_access(priv))
2838                 iwl3945_release_nic_access(priv);
2839         spin_unlock_irqrestore(&priv->lock, flags);
2840
2841         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2842                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2843                                   "disabled by HW switch\n");
2844                 return;
2845         }
2846
2847         if (priv->is_open)
2848                 queue_work(priv->workqueue, &priv->restart);
2849         return;
2850 }
2851
2852 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2853                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2854 {
2855         u16 fc =
2856             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2857
2858         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2859                 return;
2860
2861         if (!(fc & IEEE80211_FCTL_PROTECTED))
2862                 return;
2863
2864         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2865         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2866         case RX_RES_STATUS_SEC_TYPE_TKIP:
2867                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2868                     RX_RES_STATUS_BAD_ICV_MIC)
2869                         stats->flag |= RX_FLAG_MMIC_ERROR;
2870         case RX_RES_STATUS_SEC_TYPE_WEP:
2871         case RX_RES_STATUS_SEC_TYPE_CCMP:
2872                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2873                     RX_RES_STATUS_DECRYPT_OK) {
2874                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2875                         stats->flag |= RX_FLAG_DECRYPTED;
2876                 }
2877                 break;
2878
2879         default:
2880                 break;
2881         }
2882 }
2883
2884 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2885
2886 #include "iwl-spectrum.h"
2887
2888 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2889 #define BEACON_TIME_MASK_HIGH   0xFF000000
2890 #define TIME_UNIT               1024
2891
2892 /*
2893  * extended beacon time format
2894  * time in usec will be changed into a 32-bit value in 8:24 format
2895  * the high 1 byte is the beacon counts
2896  * the lower 3 bytes is the time in usec within one beacon interval
2897  */
2898
2899 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2900 {
2901         u32 quot;
2902         u32 rem;
2903         u32 interval = beacon_interval * 1024;
2904
2905         if (!interval || !usec)
2906                 return 0;
2907
2908         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2909         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2910
2911         return (quot << 24) + rem;
2912 }
2913
2914 /* base is usually what we get from ucode with each received frame,
2915  * the same as HW timer counter counting down
2916  */
2917
2918 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2919 {
2920         u32 base_low = base & BEACON_TIME_MASK_LOW;
2921         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2922         u32 interval = beacon_interval * TIME_UNIT;
2923         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2924             (addon & BEACON_TIME_MASK_HIGH);
2925
2926         if (base_low > addon_low)
2927                 res += base_low - addon_low;
2928         else if (base_low < addon_low) {
2929                 res += interval + base_low - addon_low;
2930                 res += (1 << 24);
2931         } else
2932                 res += (1 << 24);
2933
2934         return cpu_to_le32(res);
2935 }
2936
2937 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
2938                                struct ieee80211_measurement_params *params,
2939                                u8 type)
2940 {
2941         struct iwl3945_spectrum_cmd spectrum;
2942         struct iwl3945_rx_packet *res;
2943         struct iwl3945_host_cmd cmd = {
2944                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2945                 .data = (void *)&spectrum,
2946                 .meta.flags = CMD_WANT_SKB,
2947         };
2948         u32 add_time = le64_to_cpu(params->start_time);
2949         int rc;
2950         int spectrum_resp_status;
2951         int duration = le16_to_cpu(params->duration);
2952
2953         if (iwl3945_is_associated(priv))
2954                 add_time =
2955                     iwl3945_usecs_to_beacons(
2956                         le64_to_cpu(params->start_time) - priv->last_tsf,
2957                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2958
2959         memset(&spectrum, 0, sizeof(spectrum));
2960
2961         spectrum.channel_count = cpu_to_le16(1);
2962         spectrum.flags =
2963             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2964         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2965         cmd.len = sizeof(spectrum);
2966         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2967
2968         if (iwl3945_is_associated(priv))
2969                 spectrum.start_time =
2970                     iwl3945_add_beacon_time(priv->last_beacon_time,
2971                                 add_time,
2972                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2973         else
2974                 spectrum.start_time = 0;
2975
2976         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2977         spectrum.channels[0].channel = params->channel;
2978         spectrum.channels[0].type = type;
2979         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2980                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2981                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2982
2983         rc = iwl3945_send_cmd_sync(priv, &cmd);
2984         if (rc)
2985                 return rc;
2986
2987         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
2988         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2989                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2990                 rc = -EIO;
2991         }
2992
2993         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2994         switch (spectrum_resp_status) {
2995         case 0:         /* Command will be handled */
2996                 if (res->u.spectrum.id != 0xff) {
2997                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
2998                                                 res->u.spectrum.id);
2999                         priv->measurement_status &= ~MEASUREMENT_READY;
3000                 }
3001                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3002                 rc = 0;
3003                 break;
3004
3005         case 1:         /* Command will not be handled */
3006                 rc = -EAGAIN;
3007                 break;
3008         }
3009
3010         dev_kfree_skb_any(cmd.meta.u.skb);
3011
3012         return rc;
3013 }
3014 #endif
3015
3016 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3017                                struct iwl3945_rx_mem_buffer *rxb)
3018 {
3019         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3020         struct iwl3945_alive_resp *palive;
3021         struct delayed_work *pwork;
3022
3023         palive = &pkt->u.alive_frame;
3024
3025         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3026                        "0x%01X 0x%01X\n",
3027                        palive->is_valid, palive->ver_type,
3028                        palive->ver_subtype);
3029
3030         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3031                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3032                 memcpy(&priv->card_alive_init,
3033                        &pkt->u.alive_frame,
3034                        sizeof(struct iwl3945_init_alive_resp));
3035                 pwork = &priv->init_alive_start;
3036         } else {
3037                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3038                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3039                        sizeof(struct iwl3945_alive_resp));
3040                 pwork = &priv->alive_start;
3041                 iwl3945_disable_events(priv);
3042         }
3043
3044         /* We delay the ALIVE response by 5ms to
3045          * give the HW RF Kill time to activate... */
3046         if (palive->is_valid == UCODE_VALID_OK)
3047                 queue_delayed_work(priv->workqueue, pwork,
3048                                    msecs_to_jiffies(5));
3049         else
3050                 IWL_WARNING("uCode did not respond OK.\n");
3051 }
3052
3053 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3054                                  struct iwl3945_rx_mem_buffer *rxb)
3055 {
3056         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3057
3058         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3059         return;
3060 }
3061
3062 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3063                                struct iwl3945_rx_mem_buffer *rxb)
3064 {
3065         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3066
3067         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3068                 "seq 0x%04X ser 0x%08X\n",
3069                 le32_to_cpu(pkt->u.err_resp.error_type),
3070                 get_cmd_string(pkt->u.err_resp.cmd_id),
3071                 pkt->u.err_resp.cmd_id,
3072                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3073                 le32_to_cpu(pkt->u.err_resp.error_info));
3074 }
3075
3076 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3077
3078 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3079 {
3080         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3081         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3082         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3083         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3084                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3085         rxon->channel = csa->channel;
3086         priv->staging_rxon.channel = csa->channel;
3087 }
3088
3089 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3090                                           struct iwl3945_rx_mem_buffer *rxb)
3091 {
3092 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3093         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3094         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3095
3096         if (!report->state) {
3097                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3098                           "Spectrum Measure Notification: Start\n");
3099                 return;
3100         }
3101
3102         memcpy(&priv->measure_report, report, sizeof(*report));
3103         priv->measurement_status |= MEASUREMENT_READY;
3104 #endif
3105 }
3106
3107 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3108                                   struct iwl3945_rx_mem_buffer *rxb)
3109 {
3110 #ifdef CONFIG_IWL3945_DEBUG
3111         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3112         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3113         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3114                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3115 #endif
3116 }
3117
3118 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3119                                              struct iwl3945_rx_mem_buffer *rxb)
3120 {
3121         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3122         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3123                         "notification for %s:\n",
3124                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3125         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3126 }
3127
3128 static void iwl3945_bg_beacon_update(struct work_struct *work)
3129 {
3130         struct iwl3945_priv *priv =
3131                 container_of(work, struct iwl3945_priv, beacon_update);
3132         struct sk_buff *beacon;
3133
3134         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3135         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
3136
3137         if (!beacon) {
3138                 IWL_ERROR("update beacon failed\n");
3139                 return;
3140         }
3141
3142         mutex_lock(&priv->mutex);
3143         /* new beacon skb is allocated every time; dispose previous.*/
3144         if (priv->ibss_beacon)
3145                 dev_kfree_skb(priv->ibss_beacon);
3146
3147         priv->ibss_beacon = beacon;
3148         mutex_unlock(&priv->mutex);
3149
3150         iwl3945_send_beacon_cmd(priv);
3151 }
3152
3153 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3154                                 struct iwl3945_rx_mem_buffer *rxb)
3155 {
3156 #ifdef CONFIG_IWL3945_DEBUG
3157         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3158         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3159         u8 rate = beacon->beacon_notify_hdr.rate;
3160
3161         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3162                 "tsf %d %d rate %d\n",
3163                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3164                 beacon->beacon_notify_hdr.failure_frame,
3165                 le32_to_cpu(beacon->ibss_mgr_status),
3166                 le32_to_cpu(beacon->high_tsf),
3167                 le32_to_cpu(beacon->low_tsf), rate);
3168 #endif
3169
3170         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3171             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3172                 queue_work(priv->workqueue, &priv->beacon_update);
3173 }
3174
3175 /* Service response to REPLY_SCAN_CMD (0x80) */
3176 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3177                               struct iwl3945_rx_mem_buffer *rxb)
3178 {
3179 #ifdef CONFIG_IWL3945_DEBUG
3180         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3181         struct iwl3945_scanreq_notification *notif =
3182             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3183
3184         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3185 #endif
3186 }
3187
3188 /* Service SCAN_START_NOTIFICATION (0x82) */
3189 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3190                                     struct iwl3945_rx_mem_buffer *rxb)
3191 {
3192         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3193         struct iwl3945_scanstart_notification *notif =
3194             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3195         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3196         IWL_DEBUG_SCAN("Scan start: "
3197                        "%d [802.11%s] "
3198                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3199                        notif->channel,
3200                        notif->band ? "bg" : "a",
3201                        notif->tsf_high,
3202                        notif->tsf_low, notif->status, notif->beacon_timer);
3203 }
3204
3205 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3206 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3207                                       struct iwl3945_rx_mem_buffer *rxb)
3208 {
3209         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3210         struct iwl3945_scanresults_notification *notif =
3211             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3212
3213         IWL_DEBUG_SCAN("Scan ch.res: "
3214                        "%d [802.11%s] "
3215                        "(TSF: 0x%08X:%08X) - %d "
3216                        "elapsed=%lu usec (%dms since last)\n",
3217                        notif->channel,
3218                        notif->band ? "bg" : "a",
3219                        le32_to_cpu(notif->tsf_high),
3220                        le32_to_cpu(notif->tsf_low),
3221                        le32_to_cpu(notif->statistics[0]),
3222                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3223                        jiffies_to_msecs(elapsed_jiffies
3224                                         (priv->last_scan_jiffies, jiffies)));
3225
3226         priv->last_scan_jiffies = jiffies;
3227         priv->next_scan_jiffies = 0;
3228 }
3229
3230 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3231 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3232                                        struct iwl3945_rx_mem_buffer *rxb)
3233 {
3234         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3235         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3236
3237         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3238                        scan_notif->scanned_channels,
3239                        scan_notif->tsf_low,
3240                        scan_notif->tsf_high, scan_notif->status);
3241
3242         /* The HW is no longer scanning */
3243         clear_bit(STATUS_SCAN_HW, &priv->status);
3244
3245         /* The scan completion notification came in, so kill that timer... */
3246         cancel_delayed_work(&priv->scan_check);
3247
3248         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3249                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
3250                                                         "2.4" : "5.2",
3251                        jiffies_to_msecs(elapsed_jiffies
3252                                         (priv->scan_pass_start, jiffies)));
3253
3254         /* Remove this scanned band from the list of pending
3255          * bands to scan, band G precedes A in order of scanning
3256          * as seen in iwl3945_bg_request_scan */
3257         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
3258                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
3259         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
3260                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
3261
3262         /* If a request to abort was given, or the scan did not succeed
3263          * then we reset the scan state machine and terminate,
3264          * re-queuing another scan if one has been requested */
3265         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3266                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3267                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3268         } else {
3269                 /* If there are more bands on this scan pass reschedule */
3270                 if (priv->scan_bands > 0)
3271                         goto reschedule;
3272         }
3273
3274         priv->last_scan_jiffies = jiffies;
3275         priv->next_scan_jiffies = 0;
3276         IWL_DEBUG_INFO("Setting scan to off\n");
3277
3278         clear_bit(STATUS_SCANNING, &priv->status);
3279
3280         IWL_DEBUG_INFO("Scan took %dms\n",
3281                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3282
3283         queue_work(priv->workqueue, &priv->scan_completed);
3284
3285         return;
3286
3287 reschedule:
3288         priv->scan_pass_start = jiffies;
3289         queue_work(priv->workqueue, &priv->request_scan);
3290 }
3291
3292 /* Handle notification from uCode that card's power state is changing
3293  * due to software, hardware, or critical temperature RFKILL */
3294 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3295                                     struct iwl3945_rx_mem_buffer *rxb)
3296 {
3297         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3298         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3299         unsigned long status = priv->status;
3300
3301         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3302                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3303                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3304
3305         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3306                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3307
3308         if (flags & HW_CARD_DISABLED)
3309                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3310         else
3311                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3312
3313
3314         if (flags & SW_CARD_DISABLED)
3315                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3316         else
3317                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3318
3319         iwl3945_scan_cancel(priv);
3320
3321         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3322              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3323             (test_bit(STATUS_RF_KILL_SW, &status) !=
3324              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3325                 queue_work(priv->workqueue, &priv->rf_kill);
3326         else
3327                 wake_up_interruptible(&priv->wait_command_queue);
3328 }
3329
3330 /**
3331  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3332  *
3333  * Setup the RX handlers for each of the reply types sent from the uCode
3334  * to the host.
3335  *
3336  * This function chains into the hardware specific files for them to setup
3337  * any hardware specific handlers as well.
3338  */
3339 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3340 {
3341         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3342         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3343         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3344         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3345         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3346             iwl3945_rx_spectrum_measure_notif;
3347         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3348         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3349             iwl3945_rx_pm_debug_statistics_notif;
3350         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3351
3352         /*
3353          * The same handler is used for both the REPLY to a discrete
3354          * statistics request from the host as well as for the periodic
3355          * statistics notifications (after received beacons) from the uCode.
3356          */
3357         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3358         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3359
3360         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3361         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3362         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3363             iwl3945_rx_scan_results_notif;
3364         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3365             iwl3945_rx_scan_complete_notif;
3366         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3367
3368         /* Set up hardware specific Rx handlers */
3369         iwl3945_hw_rx_handler_setup(priv);
3370 }
3371
3372 /**
3373  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3374  * When FW advances 'R' index, all entries between old and new 'R' index
3375  * need to be reclaimed.
3376  */
3377 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3378                                       int txq_id, int index)
3379 {
3380         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3381         struct iwl3945_queue *q = &txq->q;
3382         int nfreed = 0;
3383
3384         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3385                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3386                           "is out of range [0-%d] %d %d.\n", txq_id,
3387                           index, q->n_bd, q->write_ptr, q->read_ptr);
3388                 return;
3389         }
3390
3391         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3392                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3393                 if (nfreed > 1) {
3394                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3395                                         q->write_ptr, q->read_ptr);
3396                         queue_work(priv->workqueue, &priv->restart);
3397                         break;
3398                 }
3399                 nfreed++;
3400         }
3401 }
3402
3403
3404 /**
3405  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3406  * @rxb: Rx buffer to reclaim
3407  *
3408  * If an Rx buffer has an async callback associated with it the callback
3409  * will be executed.  The attached skb (if present) will only be freed
3410  * if the callback returns 1
3411  */
3412 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3413                                 struct iwl3945_rx_mem_buffer *rxb)
3414 {
3415         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3416         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3417         int txq_id = SEQ_TO_QUEUE(sequence);
3418         int index = SEQ_TO_INDEX(sequence);
3419         int huge = sequence & SEQ_HUGE_FRAME;
3420         int cmd_index;
3421         struct iwl3945_cmd *cmd;
3422
3423         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3424
3425         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3426         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3427
3428         /* Input error checking is done when commands are added to queue. */
3429         if (cmd->meta.flags & CMD_WANT_SKB) {
3430                 cmd->meta.source->u.skb = rxb->skb;
3431                 rxb->skb = NULL;
3432         } else if (cmd->meta.u.callback &&
3433                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3434                 rxb->skb = NULL;
3435
3436         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3437
3438         if (!(cmd->meta.flags & CMD_ASYNC)) {
3439                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3440                 wake_up_interruptible(&priv->wait_command_queue);
3441         }
3442 }
3443
3444 /************************** RX-FUNCTIONS ****************************/
3445 /*
3446  * Rx theory of operation
3447  *
3448  * The host allocates 32 DMA target addresses and passes the host address
3449  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3450  * 0 to 31
3451  *
3452  * Rx Queue Indexes
3453  * The host/firmware share two index registers for managing the Rx buffers.
3454  *
3455  * The READ index maps to the first position that the firmware may be writing
3456  * to -- the driver can read up to (but not including) this position and get
3457  * good data.
3458  * The READ index is managed by the firmware once the card is enabled.
3459  *
3460  * The WRITE index maps to the last position the driver has read from -- the
3461  * position preceding WRITE is the last slot the firmware can place a packet.
3462  *
3463  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3464  * WRITE = READ.
3465  *
3466  * During initialization, the host sets up the READ queue position to the first
3467  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3468  *
3469  * When the firmware places a packet in a buffer, it will advance the READ index
3470  * and fire the RX interrupt.  The driver can then query the READ index and
3471  * process as many packets as possible, moving the WRITE index forward as it
3472  * resets the Rx queue buffers with new memory.
3473  *
3474  * The management in the driver is as follows:
3475  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3476  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3477  *   to replenish the iwl->rxq->rx_free.
3478  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3479  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3480  *   'processed' and 'read' driver indexes as well)
3481  * + A received packet is processed and handed to the kernel network stack,
3482  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3483  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3484  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3485  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3486  *   were enough free buffers and RX_STALLED is set it is cleared.
3487  *
3488  *
3489  * Driver sequence:
3490  *
3491  * iwl3945_rx_queue_alloc()   Allocates rx_free
3492  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3493  *                            iwl3945_rx_queue_restock
3494  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3495  *                            queue, updates firmware pointers, and updates
3496  *                            the WRITE index.  If insufficient rx_free buffers
3497  *                            are available, schedules iwl3945_rx_replenish
3498  *
3499  * -- enable interrupts --
3500  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3501  *                            READ INDEX, detaching the SKB from the pool.
3502  *                            Moves the packet buffer from queue to rx_used.
3503  *                            Calls iwl3945_rx_queue_restock to refill any empty
3504  *                            slots.
3505  * ...
3506  *
3507  */
3508
3509 /**
3510  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3511  */
3512 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3513 {
3514         int s = q->read - q->write;
3515         if (s <= 0)
3516                 s += RX_QUEUE_SIZE;
3517         /* keep some buffer to not confuse full and empty queue */
3518         s -= 2;
3519         if (s < 0)
3520                 s = 0;
3521         return s;
3522 }
3523
3524 /**
3525  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3526  */
3527 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3528 {
3529         u32 reg = 0;
3530         int rc = 0;
3531         unsigned long flags;
3532
3533         spin_lock_irqsave(&q->lock, flags);
3534
3535         if (q->need_update == 0)
3536                 goto exit_unlock;
3537
3538         /* If power-saving is in use, make sure device is awake */
3539         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3540                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3541
3542                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3543                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3544                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3545                         goto exit_unlock;
3546                 }
3547
3548                 rc = iwl3945_grab_nic_access(priv);
3549                 if (rc)
3550                         goto exit_unlock;
3551
3552                 /* Device expects a multiple of 8 */
3553                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3554                                      q->write & ~0x7);
3555                 iwl3945_release_nic_access(priv);
3556
3557         /* Else device is assumed to be awake */
3558         } else
3559                 /* Device expects a multiple of 8 */
3560                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3561
3562
3563         q->need_update = 0;
3564
3565  exit_unlock:
3566         spin_unlock_irqrestore(&q->lock, flags);
3567         return rc;
3568 }
3569
3570 /**
3571  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3572  */
3573 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3574                                           dma_addr_t dma_addr)
3575 {
3576         return cpu_to_le32((u32)dma_addr);
3577 }
3578
3579 /**
3580  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3581  *
3582  * If there are slots in the RX queue that need to be restocked,
3583  * and we have free pre-allocated buffers, fill the ranks as much
3584  * as we can, pulling from rx_free.
3585  *
3586  * This moves the 'write' index forward to catch up with 'processed', and
3587  * also updates the memory address in the firmware to reference the new
3588  * target buffer.
3589  */
3590 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3591 {
3592         struct iwl3945_rx_queue *rxq = &priv->rxq;
3593         struct list_head *element;
3594         struct iwl3945_rx_mem_buffer *rxb;
3595         unsigned long flags;
3596         int write, rc;
3597
3598         spin_lock_irqsave(&rxq->lock, flags);
3599         write = rxq->write & ~0x7;
3600         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3601                 /* Get next free Rx buffer, remove from free list */
3602                 element = rxq->rx_free.next;
3603                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3604                 list_del(element);
3605
3606                 /* Point to Rx buffer via next RBD in circular buffer */
3607                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3608                 rxq->queue[rxq->write] = rxb;
3609                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3610                 rxq->free_count--;
3611         }
3612         spin_unlock_irqrestore(&rxq->lock, flags);
3613         /* If the pre-allocated buffer pool is dropping low, schedule to
3614          * refill it */
3615         if (rxq->free_count <= RX_LOW_WATERMARK)
3616                 queue_work(priv->workqueue, &priv->rx_replenish);
3617
3618
3619         /* If we've added more space for the firmware to place data, tell it.
3620          * Increment device's write pointer in multiples of 8. */
3621         if ((write != (rxq->write & ~0x7))
3622             || (abs(rxq->write - rxq->read) > 7)) {
3623                 spin_lock_irqsave(&rxq->lock, flags);
3624                 rxq->need_update = 1;
3625                 spin_unlock_irqrestore(&rxq->lock, flags);
3626                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3627                 if (rc)
3628                         return rc;
3629         }
3630
3631         return 0;
3632 }
3633
3634 /**
3635  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3636  *
3637  * When moving to rx_free an SKB is allocated for the slot.
3638  *
3639  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3640  * This is called as a scheduled work item (except for during initialization)
3641  */
3642 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3643 {
3644         struct iwl3945_rx_queue *rxq = &priv->rxq;
3645         struct list_head *element;
3646         struct iwl3945_rx_mem_buffer *rxb;
3647         unsigned long flags;
3648         spin_lock_irqsave(&rxq->lock, flags);
3649         while (!list_empty(&rxq->rx_used)) {
3650                 element = rxq->rx_used.next;
3651                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3652
3653                 /* Alloc a new receive buffer */
3654                 rxb->skb =
3655                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3656                 if (!rxb->skb) {
3657                         if (net_ratelimit())
3658                                 printk(KERN_CRIT DRV_NAME
3659                                        ": Can not allocate SKB buffers\n");
3660                         /* We don't reschedule replenish work here -- we will
3661                          * call the restock method and if it still needs
3662                          * more buffers it will schedule replenish */
3663                         break;
3664                 }
3665
3666                 /* If radiotap head is required, reserve some headroom here.
3667                  * The physical head count is a variable rx_stats->phy_count.
3668                  * We reserve 4 bytes here. Plus these extra bytes, the
3669                  * headroom of the physical head should be enough for the
3670                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3671                  */
3672                 skb_reserve(rxb->skb, 4);
3673
3674                 priv->alloc_rxb_skb++;
3675                 list_del(element);
3676
3677                 /* Get physical address of RB/SKB */
3678                 rxb->dma_addr =
3679                     pci_map_single(priv->pci_dev, rxb->skb->data,
3680                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3681                 list_add_tail(&rxb->list, &rxq->rx_free);
3682                 rxq->free_count++;
3683         }
3684         spin_unlock_irqrestore(&rxq->lock, flags);
3685 }
3686
3687 /*
3688  * this should be called while priv->lock is locked
3689  */
3690 static void __iwl3945_rx_replenish(void *data)
3691 {
3692         struct iwl3945_priv *priv = data;
3693
3694         iwl3945_rx_allocate(priv);
3695         iwl3945_rx_queue_restock(priv);
3696 }
3697
3698
3699 void iwl3945_rx_replenish(void *data)
3700 {
3701         struct iwl3945_priv *priv = data;
3702         unsigned long flags;
3703
3704         iwl3945_rx_allocate(priv);
3705
3706         spin_lock_irqsave(&priv->lock, flags);
3707         iwl3945_rx_queue_restock(priv);
3708         spin_unlock_irqrestore(&priv->lock, flags);
3709 }
3710
3711 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3712  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3713  * This free routine walks the list of POOL entries and if SKB is set to
3714  * non NULL it is unmapped and freed
3715  */
3716 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3717 {
3718         int i;
3719         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3720                 if (rxq->pool[i].skb != NULL) {
3721                         pci_unmap_single(priv->pci_dev,
3722                                          rxq->pool[i].dma_addr,
3723                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3724                         dev_kfree_skb(rxq->pool[i].skb);
3725                 }
3726         }
3727
3728         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3729                             rxq->dma_addr);
3730         rxq->bd = NULL;
3731 }
3732
3733 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3734 {
3735         struct iwl3945_rx_queue *rxq = &priv->rxq;
3736         struct pci_dev *dev = priv->pci_dev;
3737         int i;
3738
3739         spin_lock_init(&rxq->lock);
3740         INIT_LIST_HEAD(&rxq->rx_free);
3741         INIT_LIST_HEAD(&rxq->rx_used);
3742
3743         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3744         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3745         if (!rxq->bd)
3746                 return -ENOMEM;
3747
3748         /* Fill the rx_used queue with _all_ of the Rx buffers */
3749         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3750                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3751
3752         /* Set us so that we have processed and used all buffers, but have
3753          * not restocked the Rx queue with fresh buffers */
3754         rxq->read = rxq->write = 0;
3755         rxq->free_count = 0;
3756         rxq->need_update = 0;
3757         return 0;
3758 }
3759
3760 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3761 {
3762         unsigned long flags;
3763         int i;
3764         spin_lock_irqsave(&rxq->lock, flags);
3765         INIT_LIST_HEAD(&rxq->rx_free);
3766         INIT_LIST_HEAD(&rxq->rx_used);
3767         /* Fill the rx_used queue with _all_ of the Rx buffers */
3768         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3769                 /* In the reset function, these buffers may have been allocated
3770                  * to an SKB, so we need to unmap and free potential storage */
3771                 if (rxq->pool[i].skb != NULL) {
3772                         pci_unmap_single(priv->pci_dev,
3773                                          rxq->pool[i].dma_addr,
3774                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3775                         priv->alloc_rxb_skb--;
3776                         dev_kfree_skb(rxq->pool[i].skb);
3777                         rxq->pool[i].skb = NULL;
3778                 }
3779                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3780         }
3781
3782         /* Set us so that we have processed and used all buffers, but have
3783          * not restocked the Rx queue with fresh buffers */
3784         rxq->read = rxq->write = 0;
3785         rxq->free_count = 0;
3786         spin_unlock_irqrestore(&rxq->lock, flags);
3787 }
3788
3789 /* Convert linear signal-to-noise ratio into dB */
3790 static u8 ratio2dB[100] = {
3791 /*       0   1   2   3   4   5   6   7   8   9 */
3792          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3793         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3794         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3795         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3796         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3797         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3798         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3799         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3800         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3801         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3802 };
3803
3804 /* Calculates a relative dB value from a ratio of linear
3805  *   (i.e. not dB) signal levels.
3806  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3807 int iwl3945_calc_db_from_ratio(int sig_ratio)
3808 {
3809         /* 1000:1 or higher just report as 60 dB */
3810         if (sig_ratio >= 1000)
3811                 return 60;
3812
3813         /* 100:1 or higher, divide by 10 and use table,
3814          *   add 20 dB to make up for divide by 10 */
3815         if (sig_ratio >= 100)
3816                 return (20 + (int)ratio2dB[sig_ratio/10]);
3817
3818         /* We shouldn't see this */
3819         if (sig_ratio < 1)
3820                 return 0;
3821
3822         /* Use table for ratios 1:1 - 99:1 */
3823         return (int)ratio2dB[sig_ratio];
3824 }
3825
3826 #define PERFECT_RSSI (-20) /* dBm */
3827 #define WORST_RSSI (-95)   /* dBm */
3828 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3829
3830 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3831  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3832  *   about formulas used below. */
3833 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3834 {
3835         int sig_qual;
3836         int degradation = PERFECT_RSSI - rssi_dbm;
3837
3838         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3839          * as indicator; formula is (signal dbm - noise dbm).
3840          * SNR at or above 40 is a great signal (100%).
3841          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3842          * Weakest usable signal is usually 10 - 15 dB SNR. */
3843         if (noise_dbm) {
3844                 if (rssi_dbm - noise_dbm >= 40)
3845                         return 100;
3846                 else if (rssi_dbm < noise_dbm)
3847                         return 0;
3848                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3849
3850         /* Else use just the signal level.
3851          * This formula is a least squares fit of data points collected and
3852          *   compared with a reference system that had a percentage (%) display
3853          *   for signal quality. */
3854         } else
3855                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3856                             (15 * RSSI_RANGE + 62 * degradation)) /
3857                            (RSSI_RANGE * RSSI_RANGE);
3858
3859         if (sig_qual > 100)
3860                 sig_qual = 100;
3861         else if (sig_qual < 1)
3862                 sig_qual = 0;
3863
3864         return sig_qual;
3865 }
3866
3867 /**
3868  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3869  *
3870  * Uses the priv->rx_handlers callback function array to invoke
3871  * the appropriate handlers, including command responses,
3872  * frame-received notifications, and other notifications.
3873  */
3874 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3875 {
3876         struct iwl3945_rx_mem_buffer *rxb;
3877         struct iwl3945_rx_packet *pkt;
3878         struct iwl3945_rx_queue *rxq = &priv->rxq;
3879         u32 r, i;
3880         int reclaim;
3881         unsigned long flags;
3882         u8 fill_rx = 0;
3883         u32 count = 8;
3884
3885         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3886          * buffer that the driver may process (last buffer filled by ucode). */
3887         r = iwl3945_hw_get_rx_read(priv);
3888         i = rxq->read;
3889
3890         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3891                 fill_rx = 1;
3892         /* Rx interrupt, but nothing sent from uCode */
3893         if (i == r)
3894                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3895
3896         while (i != r) {
3897                 rxb = rxq->queue[i];
3898
3899                 /* If an RXB doesn't have a Rx queue slot associated with it,
3900                  * then a bug has been introduced in the queue refilling
3901                  * routines -- catch it here */
3902                 BUG_ON(rxb == NULL);
3903
3904                 rxq->queue[i] = NULL;
3905
3906                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3907                                             IWL_RX_BUF_SIZE,
3908                                             PCI_DMA_FROMDEVICE);
3909                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3910
3911                 /* Reclaim a command buffer only if this packet is a response
3912                  *   to a (driver-originated) command.
3913                  * If the packet (e.g. Rx frame) originated from uCode,
3914                  *   there is no command buffer to reclaim.
3915                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3916                  *   but apparently a few don't get set; catch them here. */
3917                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3918                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3919                         (pkt->hdr.cmd != REPLY_TX);
3920
3921                 /* Based on type of command response or notification,
3922                  *   handle those that need handling via function in
3923                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
3924                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3925                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3926                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3927                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3928                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3929                 } else {
3930                         /* No handling needed */
3931                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3932                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3933                                 r, i, get_cmd_string(pkt->hdr.cmd),
3934                                 pkt->hdr.cmd);
3935                 }
3936
3937                 if (reclaim) {
3938                         /* Invoke any callbacks, transfer the skb to caller, and
3939                          * fire off the (possibly) blocking iwl3945_send_cmd()
3940                          * as we reclaim the driver command queue */
3941                         if (rxb && rxb->skb)
3942                                 iwl3945_tx_cmd_complete(priv, rxb);
3943                         else
3944                                 IWL_WARNING("Claim null rxb?\n");
3945                 }
3946
3947                 /* For now we just don't re-use anything.  We can tweak this
3948                  * later to try and re-use notification packets and SKBs that
3949                  * fail to Rx correctly */
3950                 if (rxb->skb != NULL) {
3951                         priv->alloc_rxb_skb--;
3952                         dev_kfree_skb_any(rxb->skb);
3953                         rxb->skb = NULL;
3954                 }
3955
3956                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3957                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3958                 spin_lock_irqsave(&rxq->lock, flags);
3959                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3960                 spin_unlock_irqrestore(&rxq->lock, flags);
3961                 i = (i + 1) & RX_QUEUE_MASK;
3962                 /* If there are a lot of unused frames,
3963                  * restock the Rx queue so ucode won't assert. */
3964                 if (fill_rx) {
3965                         count++;
3966                         if (count >= 8) {
3967                                 priv->rxq.read = i;
3968                                 __iwl3945_rx_replenish(priv);
3969                                 count = 0;
3970                         }
3971                 }
3972         }
3973
3974         /* Backtrack one entry */
3975         priv->rxq.read = i;
3976         iwl3945_rx_queue_restock(priv);
3977 }
3978
3979 /**
3980  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
3981  */
3982 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
3983                                   struct iwl3945_tx_queue *txq)
3984 {
3985         u32 reg = 0;
3986         int rc = 0;
3987         int txq_id = txq->q.id;
3988
3989         if (txq->need_update == 0)
3990                 return rc;
3991
3992         /* if we're trying to save power */
3993         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3994                 /* wake up nic if it's powered down ...
3995                  * uCode will wake up, and interrupt us again, so next
3996                  * time we'll skip this part. */
3997                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3998
3999                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4000                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4001                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4002                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4003                         return rc;
4004                 }
4005
4006                 /* restore this queue's parameters in nic hardware. */
4007                 rc = iwl3945_grab_nic_access(priv);
4008                 if (rc)
4009                         return rc;
4010                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4011                                      txq->q.write_ptr | (txq_id << 8));
4012                 iwl3945_release_nic_access(priv);
4013
4014         /* else not in power-save mode, uCode will never sleep when we're
4015          * trying to tx (during RFKILL, we're not trying to tx). */
4016         } else
4017                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4018                             txq->q.write_ptr | (txq_id << 8));
4019
4020         txq->need_update = 0;
4021
4022         return rc;
4023 }
4024
4025 #ifdef CONFIG_IWL3945_DEBUG
4026 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4027 {
4028         DECLARE_MAC_BUF(mac);
4029
4030         IWL_DEBUG_RADIO("RX CONFIG:\n");
4031         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4032         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4033         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4034         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4035                         le32_to_cpu(rxon->filter_flags));
4036         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4037         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4038                         rxon->ofdm_basic_rates);
4039         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4040         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4041                         print_mac(mac, rxon->node_addr));
4042         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4043                         print_mac(mac, rxon->bssid_addr));
4044         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4045 }
4046 #endif
4047
4048 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4049 {
4050         IWL_DEBUG_ISR("Enabling interrupts\n");
4051         set_bit(STATUS_INT_ENABLED, &priv->status);
4052         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4053 }
4054
4055
4056 /* call this function to flush any scheduled tasklet */
4057 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
4058 {
4059         /* wait to make sure we flush pedding tasklet*/
4060         synchronize_irq(priv->pci_dev->irq);
4061         tasklet_kill(&priv->irq_tasklet);
4062 }
4063
4064
4065 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4066 {
4067         clear_bit(STATUS_INT_ENABLED, &priv->status);
4068
4069         /* disable interrupts from uCode/NIC to host */
4070         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4071
4072         /* acknowledge/clear/reset any interrupts still pending
4073          * from uCode or flow handler (Rx/Tx DMA) */
4074         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4075         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4076         IWL_DEBUG_ISR("Disabled interrupts\n");
4077 }
4078
4079 static const char *desc_lookup(int i)
4080 {
4081         switch (i) {
4082         case 1:
4083                 return "FAIL";
4084         case 2:
4085                 return "BAD_PARAM";
4086         case 3:
4087                 return "BAD_CHECKSUM";
4088         case 4:
4089                 return "NMI_INTERRUPT";
4090         case 5:
4091                 return "SYSASSERT";
4092         case 6:
4093                 return "FATAL_ERROR";
4094         }
4095
4096         return "UNKNOWN";
4097 }
4098
4099 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4100 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4101
4102 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4103 {
4104         u32 i;
4105         u32 desc, time, count, base, data1;
4106         u32 blink1, blink2, ilink1, ilink2;
4107         int rc;
4108
4109         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4110
4111         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4112                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4113                 return;
4114         }
4115
4116         rc = iwl3945_grab_nic_access(priv);
4117         if (rc) {
4118                 IWL_WARNING("Can not read from adapter at this time.\n");
4119                 return;
4120         }
4121
4122         count = iwl3945_read_targ_mem(priv, base);
4123
4124         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4125                 IWL_ERROR("Start IWL Error Log Dump:\n");
4126                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4127         }
4128
4129         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4130                   "ilink1  nmiPC   Line\n");
4131         for (i = ERROR_START_OFFSET;
4132              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4133              i += ERROR_ELEM_SIZE) {
4134                 desc = iwl3945_read_targ_mem(priv, base + i);
4135                 time =
4136                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4137                 blink1 =
4138                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4139                 blink2 =
4140                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4141                 ilink1 =
4142                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4143                 ilink2 =
4144                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4145                 data1 =
4146                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4147
4148                 IWL_ERROR
4149                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4150                      desc_lookup(desc), desc, time, blink1, blink2,
4151                      ilink1, ilink2, data1);
4152         }
4153
4154         iwl3945_release_nic_access(priv);
4155
4156 }
4157
4158 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4159
4160 /**
4161  * iwl3945_print_event_log - Dump error event log to syslog
4162  *
4163  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4164  */
4165 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4166                                 u32 num_events, u32 mode)
4167 {
4168         u32 i;
4169         u32 base;       /* SRAM byte address of event log header */
4170         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4171         u32 ptr;        /* SRAM byte address of log data */
4172         u32 ev, time, data; /* event log data */
4173
4174         if (num_events == 0)
4175                 return;
4176
4177         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4178
4179         if (mode == 0)
4180                 event_size = 2 * sizeof(u32);
4181         else
4182                 event_size = 3 * sizeof(u32);
4183
4184         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4185
4186         /* "time" is actually "data" for mode 0 (no timestamp).
4187          * place event id # at far right for easier visual parsing. */
4188         for (i = 0; i < num_events; i++) {
4189                 ev = iwl3945_read_targ_mem(priv, ptr);
4190                 ptr += sizeof(u32);
4191                 time = iwl3945_read_targ_mem(priv, ptr);
4192                 ptr += sizeof(u32);
4193                 if (mode == 0)
4194                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4195                 else {
4196                         data = iwl3945_read_targ_mem(priv, ptr);
4197                         ptr += sizeof(u32);
4198                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4199                 }
4200         }
4201 }
4202
4203 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4204 {
4205         int rc;
4206         u32 base;       /* SRAM byte address of event log header */
4207         u32 capacity;   /* event log capacity in # entries */
4208         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4209         u32 num_wraps;  /* # times uCode wrapped to top of log */
4210         u32 next_entry; /* index of next entry to be written by uCode */
4211         u32 size;       /* # entries that we'll print */
4212
4213         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4214         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4215                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4216                 return;
4217         }
4218
4219         rc = iwl3945_grab_nic_access(priv);
4220         if (rc) {
4221                 IWL_WARNING("Can not read from adapter at this time.\n");
4222                 return;
4223         }
4224
4225         /* event log header */
4226         capacity = iwl3945_read_targ_mem(priv, base);
4227         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4228         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4229         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4230
4231         size = num_wraps ? capacity : next_entry;
4232
4233         /* bail out if nothing in log */
4234         if (size == 0) {
4235                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4236                 iwl3945_release_nic_access(priv);
4237                 return;
4238         }
4239
4240         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4241                   size, num_wraps);
4242
4243         /* if uCode has wrapped back to top of log, start at the oldest entry,
4244          * i.e the next one that uCode would fill. */
4245         if (num_wraps)
4246                 iwl3945_print_event_log(priv, next_entry,
4247                                     capacity - next_entry, mode);
4248
4249         /* (then/else) start at top of log */
4250         iwl3945_print_event_log(priv, 0, next_entry, mode);
4251
4252         iwl3945_release_nic_access(priv);
4253 }
4254
4255 /**
4256  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4257  */
4258 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4259 {
4260         /* Set the FW error flag -- cleared on iwl3945_down */
4261         set_bit(STATUS_FW_ERROR, &priv->status);
4262
4263         /* Cancel currently queued command. */
4264         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4265
4266 #ifdef CONFIG_IWL3945_DEBUG
4267         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4268                 iwl3945_dump_nic_error_log(priv);
4269                 iwl3945_dump_nic_event_log(priv);
4270                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4271         }
4272 #endif
4273
4274         wake_up_interruptible(&priv->wait_command_queue);
4275
4276         /* Keep the restart process from trying to send host
4277          * commands by clearing the INIT status bit */
4278         clear_bit(STATUS_READY, &priv->status);
4279
4280         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4281                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4282                           "Restarting adapter due to uCode error.\n");
4283
4284                 if (iwl3945_is_associated(priv)) {
4285                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4286                                sizeof(priv->recovery_rxon));
4287                         priv->error_recovering = 1;
4288                 }
4289                 queue_work(priv->workqueue, &priv->restart);
4290         }
4291 }
4292
4293 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4294 {
4295         unsigned long flags;
4296
4297         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4298                sizeof(priv->staging_rxon));
4299         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4300         iwl3945_commit_rxon(priv);
4301
4302         iwl3945_add_station(priv, priv->bssid, 1, 0);
4303
4304         spin_lock_irqsave(&priv->lock, flags);
4305         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4306         priv->error_recovering = 0;
4307         spin_unlock_irqrestore(&priv->lock, flags);
4308 }
4309
4310 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4311 {
4312         u32 inta, handled = 0;
4313         u32 inta_fh;
4314         unsigned long flags;
4315 #ifdef CONFIG_IWL3945_DEBUG
4316         u32 inta_mask;
4317 #endif
4318
4319         spin_lock_irqsave(&priv->lock, flags);
4320
4321         /* Ack/clear/reset pending uCode interrupts.
4322          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4323          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4324         inta = iwl3945_read32(priv, CSR_INT);
4325         iwl3945_write32(priv, CSR_INT, inta);
4326
4327         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4328          * Any new interrupts that happen after this, either while we're
4329          * in this tasklet, or later, will show up in next ISR/tasklet. */
4330         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4331         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4332
4333 #ifdef CONFIG_IWL3945_DEBUG
4334         if (iwl3945_debug_level & IWL_DL_ISR) {
4335                 /* just for debug */
4336                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4337                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4338                               inta, inta_mask, inta_fh);
4339         }
4340 #endif
4341
4342         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4343          * atomic, make sure that inta covers all the interrupts that
4344          * we've discovered, even if FH interrupt came in just after
4345          * reading CSR_INT. */
4346         if (inta_fh & CSR39_FH_INT_RX_MASK)
4347                 inta |= CSR_INT_BIT_FH_RX;
4348         if (inta_fh & CSR39_FH_INT_TX_MASK)
4349                 inta |= CSR_INT_BIT_FH_TX;
4350
4351         /* Now service all interrupt bits discovered above. */
4352         if (inta & CSR_INT_BIT_HW_ERR) {
4353                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4354
4355                 /* Tell the device to stop sending interrupts */
4356                 iwl3945_disable_interrupts(priv);
4357
4358                 iwl3945_irq_handle_error(priv);
4359
4360                 handled |= CSR_INT_BIT_HW_ERR;
4361
4362                 spin_unlock_irqrestore(&priv->lock, flags);
4363
4364                 return;
4365         }
4366
4367 #ifdef CONFIG_IWL3945_DEBUG
4368         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4369                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4370                 if (inta & CSR_INT_BIT_SCD)
4371                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4372                                       "the frame/frames.\n");
4373
4374                 /* Alive notification via Rx interrupt will do the real work */
4375                 if (inta & CSR_INT_BIT_ALIVE)
4376                         IWL_DEBUG_ISR("Alive interrupt\n");
4377         }
4378 #endif
4379         /* Safely ignore these bits for debug checks below */
4380         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4381
4382         /* HW RF KILL switch toggled (4965 only) */
4383         if (inta & CSR_INT_BIT_RF_KILL) {
4384                 int hw_rf_kill = 0;
4385                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4386                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4387                         hw_rf_kill = 1;
4388
4389                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4390                                 "RF_KILL bit toggled to %s.\n",
4391                                 hw_rf_kill ? "disable radio":"enable radio");
4392
4393                 /* Queue restart only if RF_KILL switch was set to "kill"
4394                  *   when we loaded driver, and is now set to "enable".
4395                  * After we're Alive, RF_KILL gets handled by
4396                  *   iwl3945_rx_card_state_notif() */
4397                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4398                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4399                         queue_work(priv->workqueue, &priv->restart);
4400                 }
4401
4402                 handled |= CSR_INT_BIT_RF_KILL;
4403         }
4404
4405         /* Chip got too hot and stopped itself (4965 only) */
4406         if (inta & CSR_INT_BIT_CT_KILL) {
4407                 IWL_ERROR("Microcode CT kill error detected.\n");
4408                 handled |= CSR_INT_BIT_CT_KILL;
4409         }
4410
4411         /* Error detected by uCode */
4412         if (inta & CSR_INT_BIT_SW_ERR) {
4413                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4414                           inta);
4415                 iwl3945_irq_handle_error(priv);
4416                 handled |= CSR_INT_BIT_SW_ERR;
4417         }
4418
4419         /* uCode wakes up after power-down sleep */
4420         if (inta & CSR_INT_BIT_WAKEUP) {
4421                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4422                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4423                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4424                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4425                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4426                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4427                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4428                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4429
4430                 handled |= CSR_INT_BIT_WAKEUP;
4431         }
4432
4433         /* All uCode command responses, including Tx command responses,
4434          * Rx "responses" (frame-received notification), and other
4435          * notifications from uCode come through here*/
4436         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4437                 iwl3945_rx_handle(priv);
4438                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4439         }
4440
4441         if (inta & CSR_INT_BIT_FH_TX) {
4442                 IWL_DEBUG_ISR("Tx interrupt\n");
4443
4444                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4445                 if (!iwl3945_grab_nic_access(priv)) {
4446                         iwl3945_write_direct32(priv,
4447                                              FH_TCSR_CREDIT
4448                                              (ALM_FH_SRVC_CHNL), 0x0);
4449                         iwl3945_release_nic_access(priv);
4450                 }
4451                 handled |= CSR_INT_BIT_FH_TX;
4452         }
4453
4454         if (inta & ~handled)
4455                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4456
4457         if (inta & ~CSR_INI_SET_MASK) {
4458                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4459                          inta & ~CSR_INI_SET_MASK);
4460                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4461         }
4462
4463         /* Re-enable all interrupts */
4464         /* only Re-enable if disabled by irq */
4465         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4466                 iwl3945_enable_interrupts(priv);
4467
4468 #ifdef CONFIG_IWL3945_DEBUG
4469         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4470                 inta = iwl3945_read32(priv, CSR_INT);
4471                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4472                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4473                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4474                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4475         }
4476 #endif
4477         spin_unlock_irqrestore(&priv->lock, flags);
4478 }
4479
4480 static irqreturn_t iwl3945_isr(int irq, void *data)
4481 {
4482         struct iwl3945_priv *priv = data;
4483         u32 inta, inta_mask;
4484         u32 inta_fh;
4485         if (!priv)
4486                 return IRQ_NONE;
4487
4488         spin_lock(&priv->lock);
4489
4490         /* Disable (but don't clear!) interrupts here to avoid
4491          *    back-to-back ISRs and sporadic interrupts from our NIC.
4492          * If we have something to service, the tasklet will re-enable ints.
4493          * If we *don't* have something, we'll re-enable before leaving here. */
4494         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4495         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4496
4497         /* Discover which interrupts are active/pending */
4498         inta = iwl3945_read32(priv, CSR_INT);
4499         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4500
4501         /* Ignore interrupt if there's nothing in NIC to service.
4502          * This may be due to IRQ shared with another device,
4503          * or due to sporadic interrupts thrown from our NIC. */
4504         if (!inta && !inta_fh) {
4505                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4506                 goto none;
4507         }
4508
4509         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4510                 /* Hardware disappeared */
4511                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4512                 goto unplugged;
4513         }
4514
4515         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4516                       inta, inta_mask, inta_fh);
4517
4518         inta &= ~CSR_INT_BIT_SCD;
4519
4520         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4521         if (likely(inta || inta_fh))
4522                 tasklet_schedule(&priv->irq_tasklet);
4523 unplugged:
4524         spin_unlock(&priv->lock);
4525
4526         return IRQ_HANDLED;
4527
4528  none:
4529         /* re-enable interrupts here since we don't have anything to service. */
4530         /* only Re-enable if disabled by irq */
4531         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4532                 iwl3945_enable_interrupts(priv);
4533         spin_unlock(&priv->lock);
4534         return IRQ_NONE;
4535 }
4536
4537 /************************** EEPROM BANDS ****************************
4538  *
4539  * The iwl3945_eeprom_band definitions below provide the mapping from the
4540  * EEPROM contents to the specific channel number supported for each
4541  * band.
4542  *
4543  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4544  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4545  * The specific geography and calibration information for that channel
4546  * is contained in the eeprom map itself.
4547  *
4548  * During init, we copy the eeprom information and channel map
4549  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4550  *
4551  * channel_map_24/52 provides the index in the channel_info array for a
4552  * given channel.  We have to have two separate maps as there is channel
4553  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4554  * band_2
4555  *
4556  * A value of 0xff stored in the channel_map indicates that the channel
4557  * is not supported by the hardware at all.
4558  *
4559  * A value of 0xfe in the channel_map indicates that the channel is not
4560  * valid for Tx with the current hardware.  This means that
4561  * while the system can tune and receive on a given channel, it may not
4562  * be able to associate or transmit any frames on that
4563  * channel.  There is no corresponding channel information for that
4564  * entry.
4565  *
4566  *********************************************************************/
4567
4568 /* 2.4 GHz */
4569 static const u8 iwl3945_eeprom_band_1[14] = {
4570         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4571 };
4572
4573 /* 5.2 GHz bands */
4574 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4575         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4576 };
4577
4578 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4579         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4580 };
4581
4582 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4583         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4584 };
4585
4586 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4587         145, 149, 153, 157, 161, 165
4588 };
4589
4590 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4591                                     int *eeprom_ch_count,
4592                                     const struct iwl3945_eeprom_channel
4593                                     **eeprom_ch_info,
4594                                     const u8 **eeprom_ch_index)
4595 {
4596         switch (band) {
4597         case 1:         /* 2.4GHz band */
4598                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4599                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4600                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4601                 break;
4602         case 2:         /* 4.9GHz band */
4603                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4604                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4605                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4606                 break;
4607         case 3:         /* 5.2GHz band */
4608                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4609                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4610                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4611                 break;
4612         case 4:         /* 5.5GHz band */
4613                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4614                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4615                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4616                 break;
4617         case 5:         /* 5.7GHz band */
4618                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4619                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4620                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4621                 break;
4622         default:
4623                 BUG();
4624                 return;
4625         }
4626 }
4627
4628 /**
4629  * iwl3945_get_channel_info - Find driver's private channel info
4630  *
4631  * Based on band and channel number.
4632  */
4633 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4634                                                     enum ieee80211_band band, u16 channel)
4635 {
4636         int i;
4637
4638         switch (band) {
4639         case IEEE80211_BAND_5GHZ:
4640                 for (i = 14; i < priv->channel_count; i++) {
4641                         if (priv->channel_info[i].channel == channel)
4642                                 return &priv->channel_info[i];
4643                 }
4644                 break;
4645
4646         case IEEE80211_BAND_2GHZ:
4647                 if (channel >= 1 && channel <= 14)
4648                         return &priv->channel_info[channel - 1];
4649                 break;
4650         case IEEE80211_NUM_BANDS:
4651                 WARN_ON(1);
4652         }
4653
4654         return NULL;
4655 }
4656
4657 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4658                             ? # x " " : "")
4659
4660 /**
4661  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4662  */
4663 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4664 {
4665         int eeprom_ch_count = 0;
4666         const u8 *eeprom_ch_index = NULL;
4667         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4668         int band, ch;
4669         struct iwl3945_channel_info *ch_info;
4670
4671         if (priv->channel_count) {
4672                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4673                 return 0;
4674         }
4675
4676         if (priv->eeprom.version < 0x2f) {
4677                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4678                             priv->eeprom.version);
4679                 return -EINVAL;
4680         }
4681
4682         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4683
4684         priv->channel_count =
4685             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4686             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4687             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4688             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4689             ARRAY_SIZE(iwl3945_eeprom_band_5);
4690
4691         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4692
4693         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4694                                      priv->channel_count, GFP_KERNEL);
4695         if (!priv->channel_info) {
4696                 IWL_ERROR("Could not allocate channel_info\n");
4697                 priv->channel_count = 0;
4698                 return -ENOMEM;
4699         }
4700
4701         ch_info = priv->channel_info;
4702
4703         /* Loop through the 5 EEPROM bands adding them in order to the
4704          * channel map we maintain (that contains additional information than
4705          * what just in the EEPROM) */
4706         for (band = 1; band <= 5; band++) {
4707
4708                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4709                                         &eeprom_ch_info, &eeprom_ch_index);
4710
4711                 /* Loop through each band adding each of the channels */
4712                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4713                         ch_info->channel = eeprom_ch_index[ch];
4714                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4715                             IEEE80211_BAND_5GHZ;
4716
4717                         /* permanently store EEPROM's channel regulatory flags
4718                          *   and max power in channel info database. */
4719                         ch_info->eeprom = eeprom_ch_info[ch];
4720
4721                         /* Copy the run-time flags so they are there even on
4722                          * invalid channels */
4723                         ch_info->flags = eeprom_ch_info[ch].flags;
4724
4725                         if (!(is_channel_valid(ch_info))) {
4726                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4727                                                "No traffic\n",
4728                                                ch_info->channel,
4729                                                ch_info->flags,
4730                                                is_channel_a_band(ch_info) ?
4731                                                "5.2" : "2.4");
4732                                 ch_info++;
4733                                 continue;
4734                         }
4735
4736                         /* Initialize regulatory-based run-time data */
4737                         ch_info->max_power_avg = ch_info->curr_txpow =
4738                             eeprom_ch_info[ch].max_power_avg;
4739                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4740                         ch_info->min_power = 0;
4741
4742                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
4743                                        " %ddBm): Ad-Hoc %ssupported\n",
4744                                        ch_info->channel,
4745                                        is_channel_a_band(ch_info) ?
4746                                        "5.2" : "2.4",
4747                                        CHECK_AND_PRINT(VALID),
4748                                        CHECK_AND_PRINT(IBSS),
4749                                        CHECK_AND_PRINT(ACTIVE),
4750                                        CHECK_AND_PRINT(RADAR),
4751                                        CHECK_AND_PRINT(WIDE),
4752                                        CHECK_AND_PRINT(DFS),
4753                                        eeprom_ch_info[ch].flags,
4754                                        eeprom_ch_info[ch].max_power_avg,
4755                                        ((eeprom_ch_info[ch].
4756                                          flags & EEPROM_CHANNEL_IBSS)
4757                                         && !(eeprom_ch_info[ch].
4758                                              flags & EEPROM_CHANNEL_RADAR))
4759                                        ? "" : "not ");
4760
4761                         /* Set the user_txpower_limit to the highest power
4762                          * supported by any channel */
4763                         if (eeprom_ch_info[ch].max_power_avg >
4764                             priv->user_txpower_limit)
4765                                 priv->user_txpower_limit =
4766                                     eeprom_ch_info[ch].max_power_avg;
4767
4768                         ch_info++;
4769                 }
4770         }
4771
4772         /* Set up txpower settings in driver for all channels */
4773         if (iwl3945_txpower_set_from_eeprom(priv))
4774                 return -EIO;
4775
4776         return 0;
4777 }
4778
4779 /*
4780  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4781  */
4782 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4783 {
4784         kfree(priv->channel_info);
4785         priv->channel_count = 0;
4786 }
4787
4788 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4789  * sending probe req.  This should be set long enough to hear probe responses
4790  * from more than one AP.  */
4791 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4792 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4793
4794 /* For faster active scanning, scan will move to the next channel if fewer than
4795  * PLCP_QUIET_THRESH packets are heard on this channel within
4796  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4797  * time if it's a quiet channel (nothing responded to our probe, and there's
4798  * no other traffic).
4799  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4800 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4801 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4802
4803 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4804  * Must be set longer than active dwell time.
4805  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4806 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4807 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4808 #define IWL_PASSIVE_DWELL_BASE      (100)
4809 #define IWL_CHANNEL_TUNE_TIME       5
4810
4811 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4812                                                 enum ieee80211_band band)
4813 {
4814         if (band == IEEE80211_BAND_5GHZ)
4815                 return IWL_ACTIVE_DWELL_TIME_52;
4816         else
4817                 return IWL_ACTIVE_DWELL_TIME_24;
4818 }
4819
4820 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4821                                           enum ieee80211_band band)
4822 {
4823         u16 active = iwl3945_get_active_dwell_time(priv, band);
4824         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4825             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4826             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4827
4828         if (iwl3945_is_associated(priv)) {
4829                 /* If we're associated, we clamp the maximum passive
4830                  * dwell time to be 98% of the beacon interval (minus
4831                  * 2 * channel tune time) */
4832                 passive = priv->beacon_int;
4833                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4834                         passive = IWL_PASSIVE_DWELL_BASE;
4835                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4836         }
4837
4838         if (passive <= active)
4839                 passive = active + 1;
4840
4841         return passive;
4842 }
4843
4844 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4845                                          enum ieee80211_band band,
4846                                      u8 is_active, u8 direct_mask,
4847                                      struct iwl3945_scan_channel *scan_ch)
4848 {
4849         const struct ieee80211_channel *channels = NULL;
4850         const struct ieee80211_supported_band *sband;
4851         const struct iwl3945_channel_info *ch_info;
4852         u16 passive_dwell = 0;
4853         u16 active_dwell = 0;
4854         int added, i;
4855
4856         sband = iwl3945_get_band(priv, band);
4857         if (!sband)
4858                 return 0;
4859
4860         channels = sband->channels;
4861
4862         active_dwell = iwl3945_get_active_dwell_time(priv, band);
4863         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4864
4865         for (i = 0, added = 0; i < sband->n_channels; i++) {
4866                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4867                         continue;
4868
4869                 scan_ch->channel = channels[i].hw_value;
4870
4871                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4872                 if (!is_channel_valid(ch_info)) {
4873                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
4874                                        scan_ch->channel);
4875                         continue;
4876                 }
4877
4878                 if (!is_active || is_channel_passive(ch_info) ||
4879                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4880                         scan_ch->type = 0;      /* passive */
4881                 else
4882                         scan_ch->type = 1;      /* active */
4883
4884                 if (scan_ch->type & 1)
4885                         scan_ch->type |= (direct_mask << 1);
4886
4887                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4888                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4889
4890                 /* Set txpower levels to defaults */
4891                 scan_ch->tpc.dsp_atten = 110;
4892                 /* scan_pwr_info->tpc.dsp_atten; */
4893
4894                 /*scan_pwr_info->tpc.tx_gain; */
4895                 if (band == IEEE80211_BAND_5GHZ)
4896                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4897                 else {
4898                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4899                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4900                          * power level:
4901                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4902                          */
4903                 }
4904
4905                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4906                                scan_ch->channel,
4907                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4908                                (scan_ch->type & 1) ?
4909                                active_dwell : passive_dwell);
4910
4911                 scan_ch++;
4912                 added++;
4913         }
4914
4915         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4916         return added;
4917 }
4918
4919 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
4920                               struct ieee80211_rate *rates)
4921 {
4922         int i;
4923
4924         for (i = 0; i < IWL_RATE_COUNT; i++) {
4925                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
4926                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4927                 rates[i].hw_value_short = i;
4928                 rates[i].flags = 0;
4929                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4930                         /*
4931                          * If CCK != 1M then set short preamble rate flag.
4932                          */
4933                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
4934                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4935                 }
4936         }
4937 }
4938
4939 /**
4940  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
4941  */
4942 static int iwl3945_init_geos(struct iwl3945_priv *priv)
4943 {
4944         struct iwl3945_channel_info *ch;
4945         struct ieee80211_supported_band *sband;
4946         struct ieee80211_channel *channels;
4947         struct ieee80211_channel *geo_ch;
4948         struct ieee80211_rate *rates;
4949         int i = 0;
4950
4951         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4952             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4953                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4954                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4955                 return 0;
4956         }
4957
4958         channels = kzalloc(sizeof(struct ieee80211_channel) *
4959                            priv->channel_count, GFP_KERNEL);
4960         if (!channels)
4961                 return -ENOMEM;
4962
4963         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4964                         GFP_KERNEL);
4965         if (!rates) {
4966                 kfree(channels);
4967                 return -ENOMEM;
4968         }
4969
4970         /* 5.2GHz channels start after the 2.4GHz channels */
4971         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4972         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
4973         /* just OFDM */
4974         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4975         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4976
4977         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4978         sband->channels = channels;
4979         /* OFDM & CCK */
4980         sband->bitrates = rates;
4981         sband->n_bitrates = IWL_RATE_COUNT;
4982
4983         priv->ieee_channels = channels;
4984         priv->ieee_rates = rates;
4985
4986         iwl3945_init_hw_rates(priv, rates);
4987
4988         for (i = 0;  i < priv->channel_count; i++) {
4989                 ch = &priv->channel_info[i];
4990
4991                 /* FIXME: might be removed if scan is OK*/
4992                 if (!is_channel_valid(ch))
4993                         continue;
4994
4995                 if (is_channel_a_band(ch))
4996                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4997                 else
4998                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4999
5000                 geo_ch = &sband->channels[sband->n_channels++];
5001
5002                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5003                 geo_ch->max_power = ch->max_power_avg;
5004                 geo_ch->max_antenna_gain = 0xff;
5005                 geo_ch->hw_value = ch->channel;
5006
5007                 if (is_channel_valid(ch)) {
5008                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5009                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5010
5011                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5012                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5013
5014                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5015                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5016
5017                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5018                                 priv->max_channel_txpower_limit =
5019                                     ch->max_power_avg;
5020                 } else {
5021                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5022                 }
5023
5024                 /* Save flags for reg domain usage */
5025                 geo_ch->orig_flags = geo_ch->flags;
5026
5027                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5028                                 ch->channel, geo_ch->center_freq,
5029                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5030                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5031                                 "restricted" : "valid",
5032                                  geo_ch->flags);
5033         }
5034
5035         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5036              priv->cfg->sku & IWL_SKU_A) {
5037                 printk(KERN_INFO DRV_NAME
5038                        ": Incorrectly detected BG card as ABG.  Please send "
5039                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5040                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5041                  priv->cfg->sku &= ~IWL_SKU_A;
5042         }
5043
5044         printk(KERN_INFO DRV_NAME
5045                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5046                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5047                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5048
5049         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5050                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5051                         &priv->bands[IEEE80211_BAND_2GHZ];
5052         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5053                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5054                         &priv->bands[IEEE80211_BAND_5GHZ];
5055
5056         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5057
5058         return 0;
5059 }
5060
5061 /*
5062  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5063  */
5064 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5065 {
5066         kfree(priv->ieee_channels);
5067         kfree(priv->ieee_rates);
5068         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5069 }
5070
5071 /******************************************************************************
5072  *
5073  * uCode download functions
5074  *
5075  ******************************************************************************/
5076
5077 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5078 {
5079         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5080         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5081         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5082         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5083         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5084         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5085 }
5086
5087 /**
5088  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5089  *     looking at all data.
5090  */
5091 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5092 {
5093         u32 val;
5094         u32 save_len = len;
5095         int rc = 0;
5096         u32 errcnt;
5097
5098         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5099
5100         rc = iwl3945_grab_nic_access(priv);
5101         if (rc)
5102                 return rc;
5103
5104         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5105
5106         errcnt = 0;
5107         for (; len > 0; len -= sizeof(u32), image++) {
5108                 /* read data comes through single port, auto-incr addr */
5109                 /* NOTE: Use the debugless read so we don't flood kernel log
5110                  * if IWL_DL_IO is set */
5111                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5112                 if (val != le32_to_cpu(*image)) {
5113                         IWL_ERROR("uCode INST section is invalid at "
5114                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5115                                   save_len - len, val, le32_to_cpu(*image));
5116                         rc = -EIO;
5117                         errcnt++;
5118                         if (errcnt >= 20)
5119                                 break;
5120                 }
5121         }
5122
5123         iwl3945_release_nic_access(priv);
5124
5125         if (!errcnt)
5126                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5127
5128         return rc;
5129 }
5130
5131
5132 /**
5133  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5134  *   using sample data 100 bytes apart.  If these sample points are good,
5135  *   it's a pretty good bet that everything between them is good, too.
5136  */
5137 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5138 {
5139         u32 val;
5140         int rc = 0;
5141         u32 errcnt = 0;
5142         u32 i;
5143
5144         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5145
5146         rc = iwl3945_grab_nic_access(priv);
5147         if (rc)
5148                 return rc;
5149
5150         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5151                 /* read data comes through single port, auto-incr addr */
5152                 /* NOTE: Use the debugless read so we don't flood kernel log
5153                  * if IWL_DL_IO is set */
5154                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5155                         i + RTC_INST_LOWER_BOUND);
5156                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5157                 if (val != le32_to_cpu(*image)) {
5158 #if 0 /* Enable this if you want to see details */
5159                         IWL_ERROR("uCode INST section is invalid at "
5160                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5161                                   i, val, *image);
5162 #endif
5163                         rc = -EIO;
5164                         errcnt++;
5165                         if (errcnt >= 3)
5166                                 break;
5167                 }
5168         }
5169
5170         iwl3945_release_nic_access(priv);
5171
5172         return rc;
5173 }
5174
5175
5176 /**
5177  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5178  *    and verify its contents
5179  */
5180 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5181 {
5182         __le32 *image;
5183         u32 len;
5184         int rc = 0;
5185
5186         /* Try bootstrap */
5187         image = (__le32 *)priv->ucode_boot.v_addr;
5188         len = priv->ucode_boot.len;
5189         rc = iwl3945_verify_inst_sparse(priv, image, len);
5190         if (rc == 0) {
5191                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5192                 return 0;
5193         }
5194
5195         /* Try initialize */
5196         image = (__le32 *)priv->ucode_init.v_addr;
5197         len = priv->ucode_init.len;
5198         rc = iwl3945_verify_inst_sparse(priv, image, len);
5199         if (rc == 0) {
5200                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5201                 return 0;
5202         }
5203
5204         /* Try runtime/protocol */
5205         image = (__le32 *)priv->ucode_code.v_addr;
5206         len = priv->ucode_code.len;
5207         rc = iwl3945_verify_inst_sparse(priv, image, len);
5208         if (rc == 0) {
5209                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5210                 return 0;
5211         }
5212
5213         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5214
5215         /* Since nothing seems to match, show first several data entries in
5216          * instruction SRAM, so maybe visual inspection will give a clue.
5217          * Selection of bootstrap image (vs. other images) is arbitrary. */
5218         image = (__le32 *)priv->ucode_boot.v_addr;
5219         len = priv->ucode_boot.len;
5220         rc = iwl3945_verify_inst_full(priv, image, len);
5221
5222         return rc;
5223 }
5224
5225
5226 /* check contents of special bootstrap uCode SRAM */
5227 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5228 {
5229         __le32 *image = priv->ucode_boot.v_addr;
5230         u32 len = priv->ucode_boot.len;
5231         u32 reg;
5232         u32 val;
5233
5234         IWL_DEBUG_INFO("Begin verify bsm\n");
5235
5236         /* verify BSM SRAM contents */
5237         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5238         for (reg = BSM_SRAM_LOWER_BOUND;
5239              reg < BSM_SRAM_LOWER_BOUND + len;
5240              reg += sizeof(u32), image ++) {
5241                 val = iwl3945_read_prph(priv, reg);
5242                 if (val != le32_to_cpu(*image)) {
5243                         IWL_ERROR("BSM uCode verification failed at "
5244                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5245                                   BSM_SRAM_LOWER_BOUND,
5246                                   reg - BSM_SRAM_LOWER_BOUND, len,
5247                                   val, le32_to_cpu(*image));
5248                         return -EIO;
5249                 }
5250         }
5251
5252         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5253
5254         return 0;
5255 }
5256
5257 /**
5258  * iwl3945_load_bsm - Load bootstrap instructions
5259  *
5260  * BSM operation:
5261  *
5262  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5263  * in special SRAM that does not power down during RFKILL.  When powering back
5264  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5265  * the bootstrap program into the on-board processor, and starts it.
5266  *
5267  * The bootstrap program loads (via DMA) instructions and data for a new
5268  * program from host DRAM locations indicated by the host driver in the
5269  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5270  * automatically.
5271  *
5272  * When initializing the NIC, the host driver points the BSM to the
5273  * "initialize" uCode image.  This uCode sets up some internal data, then
5274  * notifies host via "initialize alive" that it is complete.
5275  *
5276  * The host then replaces the BSM_DRAM_* pointer values to point to the
5277  * normal runtime uCode instructions and a backup uCode data cache buffer
5278  * (filled initially with starting data values for the on-board processor),
5279  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5280  * which begins normal operation.
5281  *
5282  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5283  * the backup data cache in DRAM before SRAM is powered down.
5284  *
5285  * When powering back up, the BSM loads the bootstrap program.  This reloads
5286  * the runtime uCode instructions and the backup data cache into SRAM,
5287  * and re-launches the runtime uCode from where it left off.
5288  */
5289 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5290 {
5291         __le32 *image = priv->ucode_boot.v_addr;
5292         u32 len = priv->ucode_boot.len;
5293         dma_addr_t pinst;
5294         dma_addr_t pdata;
5295         u32 inst_len;
5296         u32 data_len;
5297         int rc;
5298         int i;
5299         u32 done;
5300         u32 reg_offset;
5301
5302         IWL_DEBUG_INFO("Begin load bsm\n");
5303
5304         /* make sure bootstrap program is no larger than BSM's SRAM size */
5305         if (len > IWL_MAX_BSM_SIZE)
5306                 return -EINVAL;
5307
5308         /* Tell bootstrap uCode where to find the "Initialize" uCode
5309          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5310          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5311          *        after the "initialize" uCode has run, to point to
5312          *        runtime/protocol instructions and backup data cache. */
5313         pinst = priv->ucode_init.p_addr;
5314         pdata = priv->ucode_init_data.p_addr;
5315         inst_len = priv->ucode_init.len;
5316         data_len = priv->ucode_init_data.len;
5317
5318         rc = iwl3945_grab_nic_access(priv);
5319         if (rc)
5320                 return rc;
5321
5322         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5323         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5324         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5325         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5326
5327         /* Fill BSM memory with bootstrap instructions */
5328         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5329              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5330              reg_offset += sizeof(u32), image++)
5331                 _iwl3945_write_prph(priv, reg_offset,
5332                                           le32_to_cpu(*image));
5333
5334         rc = iwl3945_verify_bsm(priv);
5335         if (rc) {
5336                 iwl3945_release_nic_access(priv);
5337                 return rc;
5338         }
5339
5340         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5341         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5342         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5343                                  RTC_INST_LOWER_BOUND);
5344         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5345
5346         /* Load bootstrap code into instruction SRAM now,
5347          *   to prepare to load "initialize" uCode */
5348         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5349                 BSM_WR_CTRL_REG_BIT_START);
5350
5351         /* Wait for load of bootstrap uCode to finish */
5352         for (i = 0; i < 100; i++) {
5353                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5354                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5355                         break;
5356                 udelay(10);
5357         }
5358         if (i < 100)
5359                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5360         else {
5361                 IWL_ERROR("BSM write did not complete!\n");
5362                 return -EIO;
5363         }
5364
5365         /* Enable future boot loads whenever power management unit triggers it
5366          *   (e.g. when powering back up after power-save shutdown) */
5367         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5368                 BSM_WR_CTRL_REG_BIT_START_EN);
5369
5370         iwl3945_release_nic_access(priv);
5371
5372         return 0;
5373 }
5374
5375 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5376 {
5377         /* Remove all resets to allow NIC to operate */
5378         iwl3945_write32(priv, CSR_RESET, 0);
5379 }
5380
5381 /**
5382  * iwl3945_read_ucode - Read uCode images from disk file.
5383  *
5384  * Copy into buffers for card to fetch via bus-mastering
5385  */
5386 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5387 {
5388         struct iwl3945_ucode *ucode;
5389         int ret = 0;
5390         const struct firmware *ucode_raw;
5391         /* firmware file name contains uCode/driver compatibility version */
5392         const char *name = priv->cfg->fw_name;
5393         u8 *src;
5394         size_t len;
5395         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5396
5397         /* Ask kernel firmware_class module to get the boot firmware off disk.
5398          * request_firmware() is synchronous, file is in memory on return. */
5399         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5400         if (ret < 0) {
5401                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5402                                 name, ret);
5403                 goto error;
5404         }
5405
5406         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5407                        name, ucode_raw->size);
5408
5409         /* Make sure that we got at least our header! */
5410         if (ucode_raw->size < sizeof(*ucode)) {
5411                 IWL_ERROR("File size way too small!\n");
5412                 ret = -EINVAL;
5413                 goto err_release;
5414         }
5415
5416         /* Data from ucode file:  header followed by uCode images */
5417         ucode = (void *)ucode_raw->data;
5418
5419         ver = le32_to_cpu(ucode->ver);
5420         inst_size = le32_to_cpu(ucode->inst_size);
5421         data_size = le32_to_cpu(ucode->data_size);
5422         init_size = le32_to_cpu(ucode->init_size);
5423         init_data_size = le32_to_cpu(ucode->init_data_size);
5424         boot_size = le32_to_cpu(ucode->boot_size);
5425
5426         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5427         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5428         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5429         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5430         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5431         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5432
5433         /* Verify size of file vs. image size info in file's header */
5434         if (ucode_raw->size < sizeof(*ucode) +
5435                 inst_size + data_size + init_size +
5436                 init_data_size + boot_size) {
5437
5438                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5439                                (int)ucode_raw->size);
5440                 ret = -EINVAL;
5441                 goto err_release;
5442         }
5443
5444         /* Verify that uCode images will fit in card's SRAM */
5445         if (inst_size > IWL_MAX_INST_SIZE) {
5446                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5447                                inst_size);
5448                 ret = -EINVAL;
5449                 goto err_release;
5450         }
5451
5452         if (data_size > IWL_MAX_DATA_SIZE) {
5453                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5454                                data_size);
5455                 ret = -EINVAL;
5456                 goto err_release;
5457         }
5458         if (init_size > IWL_MAX_INST_SIZE) {
5459                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5460                                 init_size);
5461                 ret = -EINVAL;
5462                 goto err_release;
5463         }
5464         if (init_data_size > IWL_MAX_DATA_SIZE) {
5465                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5466                                 init_data_size);
5467                 ret = -EINVAL;
5468                 goto err_release;
5469         }
5470         if (boot_size > IWL_MAX_BSM_SIZE) {
5471                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5472                                 boot_size);
5473                 ret = -EINVAL;
5474                 goto err_release;
5475         }
5476
5477         /* Allocate ucode buffers for card's bus-master loading ... */
5478
5479         /* Runtime instructions and 2 copies of data:
5480          * 1) unmodified from disk
5481          * 2) backup cache for save/restore during power-downs */
5482         priv->ucode_code.len = inst_size;
5483         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5484
5485         priv->ucode_data.len = data_size;
5486         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5487
5488         priv->ucode_data_backup.len = data_size;
5489         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5490
5491         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5492             !priv->ucode_data_backup.v_addr)
5493                 goto err_pci_alloc;
5494
5495         /* Initialization instructions and data */
5496         if (init_size && init_data_size) {
5497                 priv->ucode_init.len = init_size;
5498                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5499
5500                 priv->ucode_init_data.len = init_data_size;
5501                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5502
5503                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5504                         goto err_pci_alloc;
5505         }
5506
5507         /* Bootstrap (instructions only, no data) */
5508         if (boot_size) {
5509                 priv->ucode_boot.len = boot_size;
5510                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5511
5512                 if (!priv->ucode_boot.v_addr)
5513                         goto err_pci_alloc;
5514         }
5515
5516         /* Copy images into buffers for card's bus-master reads ... */
5517
5518         /* Runtime instructions (first block of data in file) */
5519         src = &ucode->data[0];
5520         len = priv->ucode_code.len;
5521         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5522         memcpy(priv->ucode_code.v_addr, src, len);
5523         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5524                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5525
5526         /* Runtime data (2nd block)
5527          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5528         src = &ucode->data[inst_size];
5529         len = priv->ucode_data.len;
5530         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5531         memcpy(priv->ucode_data.v_addr, src, len);
5532         memcpy(priv->ucode_data_backup.v_addr, src, len);
5533
5534         /* Initialization instructions (3rd block) */
5535         if (init_size) {
5536                 src = &ucode->data[inst_size + data_size];
5537                 len = priv->ucode_init.len;
5538                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5539                                len);
5540                 memcpy(priv->ucode_init.v_addr, src, len);
5541         }
5542
5543         /* Initialization data (4th block) */
5544         if (init_data_size) {
5545                 src = &ucode->data[inst_size + data_size + init_size];
5546                 len = priv->ucode_init_data.len;
5547                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5548                                (int)len);
5549                 memcpy(priv->ucode_init_data.v_addr, src, len);
5550         }
5551
5552         /* Bootstrap instructions (5th block) */
5553         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5554         len = priv->ucode_boot.len;
5555         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5556                        (int)len);
5557         memcpy(priv->ucode_boot.v_addr, src, len);
5558
5559         /* We have our copies now, allow OS release its copies */
5560         release_firmware(ucode_raw);
5561         return 0;
5562
5563  err_pci_alloc:
5564         IWL_ERROR("failed to allocate pci memory\n");
5565         ret = -ENOMEM;
5566         iwl3945_dealloc_ucode_pci(priv);
5567
5568  err_release:
5569         release_firmware(ucode_raw);
5570
5571  error:
5572         return ret;
5573 }
5574
5575
5576 /**
5577  * iwl3945_set_ucode_ptrs - Set uCode address location
5578  *
5579  * Tell initialization uCode where to find runtime uCode.
5580  *
5581  * BSM registers initially contain pointers to initialization uCode.
5582  * We need to replace them to load runtime uCode inst and data,
5583  * and to save runtime data when powering down.
5584  */
5585 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5586 {
5587         dma_addr_t pinst;
5588         dma_addr_t pdata;
5589         int rc = 0;
5590         unsigned long flags;
5591
5592         /* bits 31:0 for 3945 */
5593         pinst = priv->ucode_code.p_addr;
5594         pdata = priv->ucode_data_backup.p_addr;
5595
5596         spin_lock_irqsave(&priv->lock, flags);
5597         rc = iwl3945_grab_nic_access(priv);
5598         if (rc) {
5599                 spin_unlock_irqrestore(&priv->lock, flags);
5600                 return rc;
5601         }
5602
5603         /* Tell bootstrap uCode where to find image to load */
5604         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5605         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5606         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5607                                  priv->ucode_data.len);
5608
5609         /* Inst bytecount must be last to set up, bit 31 signals uCode
5610          *   that all new ptr/size info is in place */
5611         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5612                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5613
5614         iwl3945_release_nic_access(priv);
5615
5616         spin_unlock_irqrestore(&priv->lock, flags);
5617
5618         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5619
5620         return rc;
5621 }
5622
5623 /**
5624  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5625  *
5626  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5627  *
5628  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5629  */
5630 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5631 {
5632         /* Check alive response for "valid" sign from uCode */
5633         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5634                 /* We had an error bringing up the hardware, so take it
5635                  * all the way back down so we can try again */
5636                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5637                 goto restart;
5638         }
5639
5640         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5641          * This is a paranoid check, because we would not have gotten the
5642          * "initialize" alive if code weren't properly loaded.  */
5643         if (iwl3945_verify_ucode(priv)) {
5644                 /* Runtime instruction load was bad;
5645                  * take it all the way back down so we can try again */
5646                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5647                 goto restart;
5648         }
5649
5650         /* Send pointers to protocol/runtime uCode image ... init code will
5651          * load and launch runtime uCode, which will send us another "Alive"
5652          * notification. */
5653         IWL_DEBUG_INFO("Initialization Alive received.\n");
5654         if (iwl3945_set_ucode_ptrs(priv)) {
5655                 /* Runtime instruction load won't happen;
5656                  * take it all the way back down so we can try again */
5657                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5658                 goto restart;
5659         }
5660         return;
5661
5662  restart:
5663         queue_work(priv->workqueue, &priv->restart);
5664 }
5665
5666
5667 /**
5668  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5669  *                   from protocol/runtime uCode (initialization uCode's
5670  *                   Alive gets handled by iwl3945_init_alive_start()).
5671  */
5672 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5673 {
5674         int rc = 0;
5675         int thermal_spin = 0;
5676         u32 rfkill;
5677
5678         IWL_DEBUG_INFO("Runtime Alive received.\n");
5679
5680         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5681                 /* We had an error bringing up the hardware, so take it
5682                  * all the way back down so we can try again */
5683                 IWL_DEBUG_INFO("Alive failed.\n");
5684                 goto restart;
5685         }
5686
5687         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5688          * This is a paranoid check, because we would not have gotten the
5689          * "runtime" alive if code weren't properly loaded.  */
5690         if (iwl3945_verify_ucode(priv)) {
5691                 /* Runtime instruction load was bad;
5692                  * take it all the way back down so we can try again */
5693                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5694                 goto restart;
5695         }
5696
5697         iwl3945_clear_stations_table(priv);
5698
5699         rc = iwl3945_grab_nic_access(priv);
5700         if (rc) {
5701                 IWL_WARNING("Can not read rfkill status from adapter\n");
5702                 return;
5703         }
5704
5705         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5706         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5707         iwl3945_release_nic_access(priv);
5708
5709         if (rfkill & 0x1) {
5710                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5711                 /* if rfkill is not on, then wait for thermal
5712                  * sensor in adapter to kick in */
5713                 while (iwl3945_hw_get_temperature(priv) == 0) {
5714                         thermal_spin++;
5715                         udelay(10);
5716                 }
5717
5718                 if (thermal_spin)
5719                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5720                                        thermal_spin * 10);
5721         } else
5722                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5723
5724         /* After the ALIVE response, we can send commands to 3945 uCode */
5725         set_bit(STATUS_ALIVE, &priv->status);
5726
5727         /* Clear out the uCode error bit if it is set */
5728         clear_bit(STATUS_FW_ERROR, &priv->status);
5729
5730         if (iwl3945_is_rfkill(priv))
5731                 return;
5732
5733         ieee80211_wake_queues(priv->hw);
5734
5735         priv->active_rate = priv->rates_mask;
5736         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5737
5738         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5739
5740         if (iwl3945_is_associated(priv)) {
5741                 struct iwl3945_rxon_cmd *active_rxon =
5742                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5743
5744                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5745                        sizeof(priv->staging_rxon));
5746                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5747         } else {
5748                 /* Initialize our rx_config data */
5749                 iwl3945_connection_init_rx_config(priv);
5750                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5751         }
5752
5753         /* Configure Bluetooth device coexistence support */
5754         iwl3945_send_bt_config(priv);
5755
5756         /* Configure the adapter for unassociated operation */
5757         iwl3945_commit_rxon(priv);
5758
5759         iwl3945_reg_txpower_periodic(priv);
5760
5761         iwl3945_led_register(priv);
5762
5763         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5764         set_bit(STATUS_READY, &priv->status);
5765         wake_up_interruptible(&priv->wait_command_queue);
5766
5767         if (priv->error_recovering)
5768                 iwl3945_error_recovery(priv);
5769
5770         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5771         return;
5772
5773  restart:
5774         queue_work(priv->workqueue, &priv->restart);
5775 }
5776
5777 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5778
5779 static void __iwl3945_down(struct iwl3945_priv *priv)
5780 {
5781         unsigned long flags;
5782         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5783         struct ieee80211_conf *conf = NULL;
5784
5785         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5786
5787         conf = ieee80211_get_hw_conf(priv->hw);
5788
5789         if (!exit_pending)
5790                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5791
5792         iwl3945_led_unregister(priv);
5793         iwl3945_clear_stations_table(priv);
5794
5795         /* Unblock any waiting calls */
5796         wake_up_interruptible_all(&priv->wait_command_queue);
5797
5798         /* Wipe out the EXIT_PENDING status bit if we are not actually
5799          * exiting the module */
5800         if (!exit_pending)
5801                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5802
5803         /* stop and reset the on-board processor */
5804         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5805
5806         /* tell the device to stop sending interrupts */
5807         spin_lock_irqsave(&priv->lock, flags);
5808         iwl3945_disable_interrupts(priv);
5809         spin_unlock_irqrestore(&priv->lock, flags);
5810         iwl_synchronize_irq(priv);
5811
5812         if (priv->mac80211_registered)
5813                 ieee80211_stop_queues(priv->hw);
5814
5815         /* If we have not previously called iwl3945_init() then
5816          * clear all bits but the RF Kill and SUSPEND bits and return */
5817         if (!iwl3945_is_init(priv)) {
5818                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5819                                         STATUS_RF_KILL_HW |
5820                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5821                                         STATUS_RF_KILL_SW |
5822                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5823                                         STATUS_GEO_CONFIGURED |
5824                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5825                                         STATUS_IN_SUSPEND |
5826                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5827                                         STATUS_EXIT_PENDING;
5828                 goto exit;
5829         }
5830
5831         /* ...otherwise clear out all the status bits but the RF Kill and
5832          * SUSPEND bits and continue taking the NIC down. */
5833         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5834                                 STATUS_RF_KILL_HW |
5835                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5836                                 STATUS_RF_KILL_SW |
5837                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5838                                 STATUS_GEO_CONFIGURED |
5839                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5840                                 STATUS_IN_SUSPEND |
5841                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5842                                 STATUS_FW_ERROR |
5843                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5844                                 STATUS_EXIT_PENDING;
5845
5846         spin_lock_irqsave(&priv->lock, flags);
5847         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5848         spin_unlock_irqrestore(&priv->lock, flags);
5849
5850         iwl3945_hw_txq_ctx_stop(priv);
5851         iwl3945_hw_rxq_stop(priv);
5852
5853         spin_lock_irqsave(&priv->lock, flags);
5854         if (!iwl3945_grab_nic_access(priv)) {
5855                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5856                                          APMG_CLK_VAL_DMA_CLK_RQT);
5857                 iwl3945_release_nic_access(priv);
5858         }
5859         spin_unlock_irqrestore(&priv->lock, flags);
5860
5861         udelay(5);
5862
5863         iwl3945_hw_nic_stop_master(priv);
5864         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5865         iwl3945_hw_nic_reset(priv);
5866
5867  exit:
5868         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5869
5870         if (priv->ibss_beacon)
5871                 dev_kfree_skb(priv->ibss_beacon);
5872         priv->ibss_beacon = NULL;
5873
5874         /* clear out any free frames */
5875         iwl3945_clear_free_frames(priv);
5876 }
5877
5878 static void iwl3945_down(struct iwl3945_priv *priv)
5879 {
5880         mutex_lock(&priv->mutex);
5881         __iwl3945_down(priv);
5882         mutex_unlock(&priv->mutex);
5883
5884         iwl3945_cancel_deferred_work(priv);
5885 }
5886
5887 #define MAX_HW_RESTARTS 5
5888
5889 static int __iwl3945_up(struct iwl3945_priv *priv)
5890 {
5891         int rc, i;
5892
5893         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5894                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5895                 return -EIO;
5896         }
5897
5898         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5899                 IWL_WARNING("Radio disabled by SW RF kill (module "
5900                             "parameter)\n");
5901                 return -ENODEV;
5902         }
5903
5904         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5905                 IWL_ERROR("ucode not available for device bringup\n");
5906                 return -EIO;
5907         }
5908
5909         /* If platform's RF_KILL switch is NOT set to KILL */
5910         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
5911                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5912                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5913         else {
5914                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5915                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5916                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5917                         return -ENODEV;
5918                 }
5919         }
5920
5921         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5922
5923         rc = iwl3945_hw_nic_init(priv);
5924         if (rc) {
5925                 IWL_ERROR("Unable to int nic\n");
5926                 return rc;
5927         }
5928
5929         /* make sure rfkill handshake bits are cleared */
5930         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5931         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5932                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5933
5934         /* clear (again), then enable host interrupts */
5935         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5936         iwl3945_enable_interrupts(priv);
5937
5938         /* really make sure rfkill handshake bits are cleared */
5939         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5940         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5941
5942         /* Copy original ucode data image from disk into backup cache.
5943          * This will be used to initialize the on-board processor's
5944          * data SRAM for a clean start when the runtime program first loads. */
5945         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5946                priv->ucode_data.len);
5947
5948         /* We return success when we resume from suspend and rf_kill is on. */
5949         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5950                 return 0;
5951
5952         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5953
5954                 iwl3945_clear_stations_table(priv);
5955
5956                 /* load bootstrap state machine,
5957                  * load bootstrap program into processor's memory,
5958                  * prepare to load the "initialize" uCode */
5959                 rc = iwl3945_load_bsm(priv);
5960
5961                 if (rc) {
5962                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
5963                         continue;
5964                 }
5965
5966                 /* start card; "initialize" will load runtime ucode */
5967                 iwl3945_nic_start(priv);
5968
5969                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5970
5971                 return 0;
5972         }
5973
5974         set_bit(STATUS_EXIT_PENDING, &priv->status);
5975         __iwl3945_down(priv);
5976         clear_bit(STATUS_EXIT_PENDING, &priv->status);
5977
5978         /* tried to restart and config the device for as long as our
5979          * patience could withstand */
5980         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5981         return -EIO;
5982 }
5983
5984
5985 /*****************************************************************************
5986  *
5987  * Workqueue callbacks
5988  *
5989  *****************************************************************************/
5990
5991 static void iwl3945_bg_init_alive_start(struct work_struct *data)
5992 {
5993         struct iwl3945_priv *priv =
5994             container_of(data, struct iwl3945_priv, init_alive_start.work);
5995
5996         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5997                 return;
5998
5999         mutex_lock(&priv->mutex);
6000         iwl3945_init_alive_start(priv);
6001         mutex_unlock(&priv->mutex);
6002 }
6003
6004 static void iwl3945_bg_alive_start(struct work_struct *data)
6005 {
6006         struct iwl3945_priv *priv =
6007             container_of(data, struct iwl3945_priv, alive_start.work);
6008
6009         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6010                 return;
6011
6012         mutex_lock(&priv->mutex);
6013         iwl3945_alive_start(priv);
6014         mutex_unlock(&priv->mutex);
6015 }
6016
6017 static void iwl3945_bg_rf_kill(struct work_struct *work)
6018 {
6019         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6020
6021         wake_up_interruptible(&priv->wait_command_queue);
6022
6023         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6024                 return;
6025
6026         mutex_lock(&priv->mutex);
6027
6028         if (!iwl3945_is_rfkill(priv)) {
6029                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6030                           "HW and/or SW RF Kill no longer active, restarting "
6031                           "device\n");
6032                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6033                         queue_work(priv->workqueue, &priv->restart);
6034         } else {
6035
6036                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6037                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6038                                           "disabled by SW switch\n");
6039                 else
6040                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6041                                     "Kill switch must be turned off for "
6042                                     "wireless networking to work.\n");
6043         }
6044
6045         mutex_unlock(&priv->mutex);
6046         iwl3945_rfkill_set_hw_state(priv);
6047 }
6048
6049 static void iwl3945_bg_set_monitor(struct work_struct *work)
6050 {
6051         struct iwl3945_priv *priv = container_of(work,
6052                                 struct iwl3945_priv, set_monitor);
6053
6054         IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");
6055
6056         mutex_lock(&priv->mutex);
6057
6058         if (!iwl3945_is_ready(priv))
6059                 IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
6060         else
6061                 if (iwl3945_set_mode(priv, IEEE80211_IF_TYPE_MNTR) != 0)
6062                         IWL_ERROR("iwl3945_set_mode() failed\n");
6063
6064         mutex_unlock(&priv->mutex);
6065 }
6066
6067 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6068
6069 static void iwl3945_bg_scan_check(struct work_struct *data)
6070 {
6071         struct iwl3945_priv *priv =
6072             container_of(data, struct iwl3945_priv, scan_check.work);
6073
6074         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6075                 return;
6076
6077         mutex_lock(&priv->mutex);
6078         if (test_bit(STATUS_SCANNING, &priv->status) ||
6079             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6080                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6081                           "Scan completion watchdog resetting adapter (%dms)\n",
6082                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6083
6084                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6085                         iwl3945_send_scan_abort(priv);
6086         }
6087         mutex_unlock(&priv->mutex);
6088 }
6089
6090 static void iwl3945_bg_request_scan(struct work_struct *data)
6091 {
6092         struct iwl3945_priv *priv =
6093             container_of(data, struct iwl3945_priv, request_scan);
6094         struct iwl3945_host_cmd cmd = {
6095                 .id = REPLY_SCAN_CMD,
6096                 .len = sizeof(struct iwl3945_scan_cmd),
6097                 .meta.flags = CMD_SIZE_HUGE,
6098         };
6099         int rc = 0;
6100         struct iwl3945_scan_cmd *scan;
6101         struct ieee80211_conf *conf = NULL;
6102         u8 direct_mask;
6103         enum ieee80211_band band;
6104
6105         conf = ieee80211_get_hw_conf(priv->hw);
6106
6107         mutex_lock(&priv->mutex);
6108
6109         if (!iwl3945_is_ready(priv)) {
6110                 IWL_WARNING("request scan called when driver not ready.\n");
6111                 goto done;
6112         }
6113
6114         /* Make sure the scan wasn't cancelled before this queued work
6115          * was given the chance to run... */
6116         if (!test_bit(STATUS_SCANNING, &priv->status))
6117                 goto done;
6118
6119         /* This should never be called or scheduled if there is currently
6120          * a scan active in the hardware. */
6121         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6122                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6123                                "Ignoring second request.\n");
6124                 rc = -EIO;
6125                 goto done;
6126         }
6127
6128         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6129                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6130                 goto done;
6131         }
6132
6133         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6134                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6135                 goto done;
6136         }
6137
6138         if (iwl3945_is_rfkill(priv)) {
6139                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6140                 goto done;
6141         }
6142
6143         if (!test_bit(STATUS_READY, &priv->status)) {
6144                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6145                 goto done;
6146         }
6147
6148         if (!priv->scan_bands) {
6149                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6150                 goto done;
6151         }
6152
6153         if (!priv->scan) {
6154                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6155                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6156                 if (!priv->scan) {
6157                         rc = -ENOMEM;
6158                         goto done;
6159                 }
6160         }
6161         scan = priv->scan;
6162         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6163
6164         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6165         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6166
6167         if (iwl3945_is_associated(priv)) {
6168                 u16 interval = 0;
6169                 u32 extra;
6170                 u32 suspend_time = 100;
6171                 u32 scan_suspend_time = 100;
6172                 unsigned long flags;
6173
6174                 IWL_DEBUG_INFO("Scanning while associated...\n");
6175
6176                 spin_lock_irqsave(&priv->lock, flags);
6177                 interval = priv->beacon_int;
6178                 spin_unlock_irqrestore(&priv->lock, flags);
6179
6180                 scan->suspend_time = 0;
6181                 scan->max_out_time = cpu_to_le32(200 * 1024);
6182                 if (!interval)
6183                         interval = suspend_time;
6184                 /*
6185                  * suspend time format:
6186                  *  0-19: beacon interval in usec (time before exec.)
6187                  * 20-23: 0
6188                  * 24-31: number of beacons (suspend between channels)
6189                  */
6190
6191                 extra = (suspend_time / interval) << 24;
6192                 scan_suspend_time = 0xFF0FFFFF &
6193                     (extra | ((suspend_time % interval) * 1024));
6194
6195                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6196                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6197                                scan_suspend_time, interval);
6198         }
6199
6200         /* We should add the ability for user to lock to PASSIVE ONLY */
6201         if (priv->one_direct_scan) {
6202                 IWL_DEBUG_SCAN
6203                     ("Kicking off one direct scan for '%s'\n",
6204                      iwl3945_escape_essid(priv->direct_ssid,
6205                                       priv->direct_ssid_len));
6206                 scan->direct_scan[0].id = WLAN_EID_SSID;
6207                 scan->direct_scan[0].len = priv->direct_ssid_len;
6208                 memcpy(scan->direct_scan[0].ssid,
6209                        priv->direct_ssid, priv->direct_ssid_len);
6210                 direct_mask = 1;
6211         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6212                 IWL_DEBUG_SCAN
6213                   ("Kicking off one direct scan for '%s' when not associated\n",
6214                    iwl3945_escape_essid(priv->essid, priv->essid_len));
6215                 scan->direct_scan[0].id = WLAN_EID_SSID;
6216                 scan->direct_scan[0].len = priv->essid_len;
6217                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6218                 direct_mask = 1;
6219         } else {
6220                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6221                 direct_mask = 0;
6222         }
6223
6224         /* We don't build a direct scan probe request; the uCode will do
6225          * that based on the direct_mask added to each channel entry */
6226         scan->tx_cmd.len = cpu_to_le16(
6227                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6228                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6229         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6230         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6231         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6232
6233         /* flags + rate selection */
6234
6235         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
6236                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6237                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6238                 scan->good_CRC_th = 0;
6239                 band = IEEE80211_BAND_2GHZ;
6240         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
6241                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6242                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6243                 band = IEEE80211_BAND_5GHZ;
6244         } else {
6245                 IWL_WARNING("Invalid scan band count\n");
6246                 goto done;
6247         }
6248
6249         /* select Rx antennas */
6250         scan->flags |= iwl3945_get_antenna_flags(priv);
6251
6252         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6253                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6254
6255         if (direct_mask)
6256                 scan->channel_count =
6257                         iwl3945_get_channels_for_scan(
6258                                 priv, band, 1, /* active */
6259                                 direct_mask,
6260                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6261         else
6262                 scan->channel_count =
6263                         iwl3945_get_channels_for_scan(
6264                                 priv, band, 0, /* passive */
6265                                 direct_mask,
6266                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6267
6268         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6269             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6270         cmd.data = scan;
6271         scan->len = cpu_to_le16(cmd.len);
6272
6273         set_bit(STATUS_SCAN_HW, &priv->status);
6274         rc = iwl3945_send_cmd_sync(priv, &cmd);
6275         if (rc)
6276                 goto done;
6277
6278         queue_delayed_work(priv->workqueue, &priv->scan_check,
6279                            IWL_SCAN_CHECK_WATCHDOG);
6280
6281         mutex_unlock(&priv->mutex);
6282         return;
6283
6284  done:
6285         /* inform mac80211 scan aborted */
6286         queue_work(priv->workqueue, &priv->scan_completed);
6287         mutex_unlock(&priv->mutex);
6288 }
6289
6290 static void iwl3945_bg_up(struct work_struct *data)
6291 {
6292         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6293
6294         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6295                 return;
6296
6297         mutex_lock(&priv->mutex);
6298         __iwl3945_up(priv);
6299         mutex_unlock(&priv->mutex);
6300         iwl3945_rfkill_set_hw_state(priv);
6301 }
6302
6303 static void iwl3945_bg_restart(struct work_struct *data)
6304 {
6305         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6306
6307         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6308                 return;
6309
6310         iwl3945_down(priv);
6311         queue_work(priv->workqueue, &priv->up);
6312 }
6313
6314 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6315 {
6316         struct iwl3945_priv *priv =
6317             container_of(data, struct iwl3945_priv, rx_replenish);
6318
6319         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6320                 return;
6321
6322         mutex_lock(&priv->mutex);
6323         iwl3945_rx_replenish(priv);
6324         mutex_unlock(&priv->mutex);
6325 }
6326
6327 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6328
6329 static void iwl3945_bg_post_associate(struct work_struct *data)
6330 {
6331         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6332                                              post_associate.work);
6333
6334         int rc = 0;
6335         struct ieee80211_conf *conf = NULL;
6336         DECLARE_MAC_BUF(mac);
6337
6338         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6339                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6340                 return;
6341         }
6342
6343
6344         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6345                         priv->assoc_id,
6346                         print_mac(mac, priv->active_rxon.bssid_addr));
6347
6348         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6349                 return;
6350
6351         mutex_lock(&priv->mutex);
6352
6353         if (!priv->vif || !priv->is_open) {
6354                 mutex_unlock(&priv->mutex);
6355                 return;
6356         }
6357         iwl3945_scan_cancel_timeout(priv, 200);
6358
6359         conf = ieee80211_get_hw_conf(priv->hw);
6360
6361         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6362         iwl3945_commit_rxon(priv);
6363
6364         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6365         iwl3945_setup_rxon_timing(priv);
6366         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6367                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6368         if (rc)
6369                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6370                             "Attempting to continue.\n");
6371
6372         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6373
6374         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6375
6376         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6377                         priv->assoc_id, priv->beacon_int);
6378
6379         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6380                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6381         else
6382                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6383
6384         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6385                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6386                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6387                 else
6388                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6389
6390                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6391                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6392
6393         }
6394
6395         iwl3945_commit_rxon(priv);
6396
6397         switch (priv->iw_mode) {
6398         case IEEE80211_IF_TYPE_STA:
6399                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6400                 break;
6401
6402         case IEEE80211_IF_TYPE_IBSS:
6403
6404                 /* clear out the station table */
6405                 iwl3945_clear_stations_table(priv);
6406
6407                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6408                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6409                 iwl3945_sync_sta(priv, IWL_STA_ID,
6410                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6411                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6412                                  CMD_ASYNC);
6413                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6414                 iwl3945_send_beacon_cmd(priv);
6415
6416                 break;
6417
6418         default:
6419                  IWL_ERROR("%s Should not be called in %d mode\n",
6420                            __FUNCTION__, priv->iw_mode);
6421                 break;
6422         }
6423
6424         iwl3945_activate_qos(priv, 0);
6425
6426         /* we have just associated, don't start scan too early */
6427         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6428         mutex_unlock(&priv->mutex);
6429 }
6430
6431 static void iwl3945_bg_abort_scan(struct work_struct *work)
6432 {
6433         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6434
6435         if (!iwl3945_is_ready(priv))
6436                 return;
6437
6438         mutex_lock(&priv->mutex);
6439
6440         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6441         iwl3945_send_scan_abort(priv);
6442
6443         mutex_unlock(&priv->mutex);
6444 }
6445
6446 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6447
6448 static void iwl3945_bg_scan_completed(struct work_struct *work)
6449 {
6450         struct iwl3945_priv *priv =
6451             container_of(work, struct iwl3945_priv, scan_completed);
6452
6453         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6454
6455         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6456                 return;
6457
6458         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6459                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6460
6461         ieee80211_scan_completed(priv->hw);
6462
6463         /* Since setting the TXPOWER may have been deferred while
6464          * performing the scan, fire one off */
6465         mutex_lock(&priv->mutex);
6466         iwl3945_hw_reg_send_txpower(priv);
6467         mutex_unlock(&priv->mutex);
6468 }
6469
6470 /*****************************************************************************
6471  *
6472  * mac80211 entry point functions
6473  *
6474  *****************************************************************************/
6475
6476 #define UCODE_READY_TIMEOUT     (2 * HZ)
6477
6478 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6479 {
6480         struct iwl3945_priv *priv = hw->priv;
6481         int ret;
6482
6483         IWL_DEBUG_MAC80211("enter\n");
6484
6485         if (pci_enable_device(priv->pci_dev)) {
6486                 IWL_ERROR("Fail to pci_enable_device\n");
6487                 return -ENODEV;
6488         }
6489         pci_restore_state(priv->pci_dev);
6490         pci_enable_msi(priv->pci_dev);
6491
6492         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6493                           DRV_NAME, priv);
6494         if (ret) {
6495                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6496                 goto out_disable_msi;
6497         }
6498
6499         /* we should be verifying the device is ready to be opened */
6500         mutex_lock(&priv->mutex);
6501
6502         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6503         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6504          * ucode filename and max sizes are card-specific. */
6505
6506         if (!priv->ucode_code.len) {
6507                 ret = iwl3945_read_ucode(priv);
6508                 if (ret) {
6509                         IWL_ERROR("Could not read microcode: %d\n", ret);
6510                         mutex_unlock(&priv->mutex);
6511                         goto out_release_irq;
6512                 }
6513         }
6514
6515         ret = __iwl3945_up(priv);
6516
6517         mutex_unlock(&priv->mutex);
6518
6519         iwl3945_rfkill_set_hw_state(priv);
6520
6521         if (ret)
6522                 goto out_release_irq;
6523
6524         IWL_DEBUG_INFO("Start UP work.\n");
6525
6526         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6527                 return 0;
6528
6529         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6530          * mac80211 will not be run successfully. */
6531         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6532                         test_bit(STATUS_READY, &priv->status),
6533                         UCODE_READY_TIMEOUT);
6534         if (!ret) {
6535                 if (!test_bit(STATUS_READY, &priv->status)) {
6536                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6537                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6538                         ret = -ETIMEDOUT;
6539                         goto out_release_irq;
6540                 }
6541         }
6542
6543         priv->is_open = 1;
6544         IWL_DEBUG_MAC80211("leave\n");
6545         return 0;
6546
6547 out_release_irq:
6548         free_irq(priv->pci_dev->irq, priv);
6549 out_disable_msi:
6550         pci_disable_msi(priv->pci_dev);
6551         pci_disable_device(priv->pci_dev);
6552         priv->is_open = 0;
6553         IWL_DEBUG_MAC80211("leave - failed\n");
6554         return ret;
6555 }
6556
6557 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6558 {
6559         struct iwl3945_priv *priv = hw->priv;
6560
6561         IWL_DEBUG_MAC80211("enter\n");
6562
6563         if (!priv->is_open) {
6564                 IWL_DEBUG_MAC80211("leave - skip\n");
6565                 return;
6566         }
6567
6568         priv->is_open = 0;
6569
6570         if (iwl3945_is_ready_rf(priv)) {
6571                 /* stop mac, cancel any scan request and clear
6572                  * RXON_FILTER_ASSOC_MSK BIT
6573                  */
6574                 mutex_lock(&priv->mutex);
6575                 iwl3945_scan_cancel_timeout(priv, 100);
6576                 cancel_delayed_work(&priv->post_associate);
6577                 mutex_unlock(&priv->mutex);
6578         }
6579
6580         iwl3945_down(priv);
6581
6582         flush_workqueue(priv->workqueue);
6583         free_irq(priv->pci_dev->irq, priv);
6584         pci_disable_msi(priv->pci_dev);
6585         pci_save_state(priv->pci_dev);
6586         pci_disable_device(priv->pci_dev);
6587
6588         IWL_DEBUG_MAC80211("leave\n");
6589 }
6590
6591 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
6592 {
6593         struct iwl3945_priv *priv = hw->priv;
6594
6595         IWL_DEBUG_MAC80211("enter\n");
6596
6597         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6598                 IWL_DEBUG_MAC80211("leave - monitor\n");
6599                 dev_kfree_skb_any(skb);
6600                 return 0;
6601         }
6602
6603         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6604                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
6605
6606         if (iwl3945_tx_skb(priv, skb))
6607                 dev_kfree_skb_any(skb);
6608
6609         IWL_DEBUG_MAC80211("leave\n");
6610         return 0;
6611 }
6612
6613 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6614                                  struct ieee80211_if_init_conf *conf)
6615 {
6616         struct iwl3945_priv *priv = hw->priv;
6617         unsigned long flags;
6618         DECLARE_MAC_BUF(mac);
6619
6620         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6621
6622         if (priv->vif) {
6623                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6624                 return -EOPNOTSUPP;
6625         }
6626
6627         spin_lock_irqsave(&priv->lock, flags);
6628         priv->vif = conf->vif;
6629
6630         spin_unlock_irqrestore(&priv->lock, flags);
6631
6632         mutex_lock(&priv->mutex);
6633
6634         if (conf->mac_addr) {
6635                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6636                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6637         }
6638
6639         if (iwl3945_is_ready(priv))
6640                 iwl3945_set_mode(priv, conf->type);
6641
6642         mutex_unlock(&priv->mutex);
6643
6644         IWL_DEBUG_MAC80211("leave\n");
6645         return 0;
6646 }
6647
6648 /**
6649  * iwl3945_mac_config - mac80211 config callback
6650  *
6651  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6652  * be set inappropriately and the driver currently sets the hardware up to
6653  * use it whenever needed.
6654  */
6655 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6656 {
6657         struct iwl3945_priv *priv = hw->priv;
6658         const struct iwl3945_channel_info *ch_info;
6659         unsigned long flags;
6660         int ret = 0;
6661
6662         mutex_lock(&priv->mutex);
6663         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6664
6665         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6666
6667         if (!iwl3945_is_ready(priv)) {
6668                 IWL_DEBUG_MAC80211("leave - not ready\n");
6669                 ret = -EIO;
6670                 goto out;
6671         }
6672
6673         if (unlikely(!iwl3945_param_disable_hw_scan &&
6674                      test_bit(STATUS_SCANNING, &priv->status))) {
6675                 IWL_DEBUG_MAC80211("leave - scanning\n");
6676                 set_bit(STATUS_CONF_PENDING, &priv->status);
6677                 mutex_unlock(&priv->mutex);
6678                 return 0;
6679         }
6680
6681         spin_lock_irqsave(&priv->lock, flags);
6682
6683         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6684                                            conf->channel->hw_value);
6685         if (!is_channel_valid(ch_info)) {
6686                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
6687                                conf->channel->hw_value, conf->channel->band);
6688                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6689                 spin_unlock_irqrestore(&priv->lock, flags);
6690                 ret = -EINVAL;
6691                 goto out;
6692         }
6693
6694         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6695
6696         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6697
6698         /* The list of supported rates and rate mask can be different
6699          * for each phymode; since the phymode may have changed, reset
6700          * the rate mask to what mac80211 lists */
6701         iwl3945_set_rate(priv);
6702
6703         spin_unlock_irqrestore(&priv->lock, flags);
6704
6705 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6706         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6707                 iwl3945_hw_channel_switch(priv, conf->channel);
6708                 goto out;
6709         }
6710 #endif
6711
6712         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6713
6714         if (!conf->radio_enabled) {
6715                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6716                 goto out;
6717         }
6718
6719         if (iwl3945_is_rfkill(priv)) {
6720                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6721                 ret = -EIO;
6722                 goto out;
6723         }
6724
6725         iwl3945_set_rate(priv);
6726
6727         if (memcmp(&priv->active_rxon,
6728                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6729                 iwl3945_commit_rxon(priv);
6730         else
6731                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6732
6733         IWL_DEBUG_MAC80211("leave\n");
6734
6735 out:
6736         clear_bit(STATUS_CONF_PENDING, &priv->status);
6737         mutex_unlock(&priv->mutex);
6738         return ret;
6739 }
6740
6741 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6742 {
6743         int rc = 0;
6744
6745         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6746                 return;
6747
6748         /* The following should be done only at AP bring up */
6749         if (!(iwl3945_is_associated(priv))) {
6750
6751                 /* RXON - unassoc (to set timing command) */
6752                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6753                 iwl3945_commit_rxon(priv);
6754
6755                 /* RXON Timing */
6756                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6757                 iwl3945_setup_rxon_timing(priv);
6758                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6759                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6760                 if (rc)
6761                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6762                                         "Attempting to continue.\n");
6763
6764                 /* FIXME: what should be the assoc_id for AP? */
6765                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6766                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6767                         priv->staging_rxon.flags |=
6768                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6769                 else
6770                         priv->staging_rxon.flags &=
6771                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6772
6773                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6774                         if (priv->assoc_capability &
6775                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6776                                 priv->staging_rxon.flags |=
6777                                         RXON_FLG_SHORT_SLOT_MSK;
6778                         else
6779                                 priv->staging_rxon.flags &=
6780                                         ~RXON_FLG_SHORT_SLOT_MSK;
6781
6782                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6783                                 priv->staging_rxon.flags &=
6784                                         ~RXON_FLG_SHORT_SLOT_MSK;
6785                 }
6786                 /* restore RXON assoc */
6787                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6788                 iwl3945_commit_rxon(priv);
6789                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6790         }
6791         iwl3945_send_beacon_cmd(priv);
6792
6793         /* FIXME - we need to add code here to detect a totally new
6794          * configuration, reset the AP, unassoc, rxon timing, assoc,
6795          * clear sta table, add BCAST sta... */
6796 }
6797
6798 /* temporary */
6799 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb);
6800
6801 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6802                                         struct ieee80211_vif *vif,
6803                                     struct ieee80211_if_conf *conf)
6804 {
6805         struct iwl3945_priv *priv = hw->priv;
6806         DECLARE_MAC_BUF(mac);
6807         unsigned long flags;
6808         int rc;
6809
6810         if (conf == NULL)
6811                 return -EIO;
6812
6813         if (priv->vif != vif) {
6814                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6815                 return 0;
6816         }
6817
6818         /* handle this temporarily here */
6819         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
6820             conf->changed & IEEE80211_IFCC_BEACON) {
6821                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
6822                 if (!beacon)
6823                         return -ENOMEM;
6824                 rc = iwl3945_mac_beacon_update(hw, beacon);
6825                 if (rc)
6826                         return rc;
6827         }
6828
6829         /* XXX: this MUST use conf->mac_addr */
6830
6831         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6832             (!conf->ssid_len)) {
6833                 IWL_DEBUG_MAC80211
6834                     ("Leaving in AP mode because HostAPD is not ready.\n");
6835                 return 0;
6836         }
6837
6838         if (!iwl3945_is_alive(priv))
6839                 return -EAGAIN;
6840
6841         mutex_lock(&priv->mutex);
6842
6843         if (conf->bssid)
6844                 IWL_DEBUG_MAC80211("bssid: %s\n",
6845                                    print_mac(mac, conf->bssid));
6846
6847 /*
6848  * very dubious code was here; the probe filtering flag is never set:
6849  *
6850         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6851             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6852  */
6853
6854         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6855                 if (!conf->bssid) {
6856                         conf->bssid = priv->mac_addr;
6857                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6858                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6859                                            print_mac(mac, conf->bssid));
6860                 }
6861                 if (priv->ibss_beacon)
6862                         dev_kfree_skb(priv->ibss_beacon);
6863
6864                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
6865         }
6866
6867         if (iwl3945_is_rfkill(priv))
6868                 goto done;
6869
6870         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6871             !is_multicast_ether_addr(conf->bssid)) {
6872                 /* If there is currently a HW scan going on in the background
6873                  * then we need to cancel it else the RXON below will fail. */
6874                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6875                         IWL_WARNING("Aborted scan still in progress "
6876                                     "after 100ms\n");
6877                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6878                         mutex_unlock(&priv->mutex);
6879                         return -EAGAIN;
6880                 }
6881                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6882
6883                 /* TODO: Audit driver for usage of these members and see
6884                  * if mac80211 deprecates them (priv->bssid looks like it
6885                  * shouldn't be there, but I haven't scanned the IBSS code
6886                  * to verify) - jpk */
6887                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6888
6889                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6890                         iwl3945_config_ap(priv);
6891                 else {
6892                         rc = iwl3945_commit_rxon(priv);
6893                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6894                                 iwl3945_add_station(priv,
6895                                         priv->active_rxon.bssid_addr, 1, 0);
6896                 }
6897
6898         } else {
6899                 iwl3945_scan_cancel_timeout(priv, 100);
6900                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6901                 iwl3945_commit_rxon(priv);
6902         }
6903
6904  done:
6905         spin_lock_irqsave(&priv->lock, flags);
6906         if (!conf->ssid_len)
6907                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6908         else
6909                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6910
6911         priv->essid_len = conf->ssid_len;
6912         spin_unlock_irqrestore(&priv->lock, flags);
6913
6914         IWL_DEBUG_MAC80211("leave\n");
6915         mutex_unlock(&priv->mutex);
6916
6917         return 0;
6918 }
6919
6920 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6921                                  unsigned int changed_flags,
6922                                  unsigned int *total_flags,
6923                                  int mc_count, struct dev_addr_list *mc_list)
6924 {
6925         struct iwl3945_priv *priv = hw->priv;
6926
6927         if (changed_flags & (*total_flags) & FIF_OTHER_BSS) {
6928                 IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
6929                                    IEEE80211_IF_TYPE_MNTR,
6930                                    changed_flags, *total_flags);
6931                 /* queue work 'cuz mac80211 is holding a lock which
6932                  * prevents us from issuing (synchronous) f/w cmds */
6933                 queue_work(priv->workqueue, &priv->set_monitor);
6934         }
6935         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
6936                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6937 }
6938
6939 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
6940                                      struct ieee80211_if_init_conf *conf)
6941 {
6942         struct iwl3945_priv *priv = hw->priv;
6943
6944         IWL_DEBUG_MAC80211("enter\n");
6945
6946         mutex_lock(&priv->mutex);
6947
6948         if (iwl3945_is_ready_rf(priv)) {
6949                 iwl3945_scan_cancel_timeout(priv, 100);
6950                 cancel_delayed_work(&priv->post_associate);
6951                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6952                 iwl3945_commit_rxon(priv);
6953         }
6954         if (priv->vif == conf->vif) {
6955                 priv->vif = NULL;
6956                 memset(priv->bssid, 0, ETH_ALEN);
6957                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6958                 priv->essid_len = 0;
6959         }
6960         mutex_unlock(&priv->mutex);
6961
6962         IWL_DEBUG_MAC80211("leave\n");
6963 }
6964
6965 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6966 {
6967         int rc = 0;
6968         unsigned long flags;
6969         struct iwl3945_priv *priv = hw->priv;
6970
6971         IWL_DEBUG_MAC80211("enter\n");
6972
6973         mutex_lock(&priv->mutex);
6974         spin_lock_irqsave(&priv->lock, flags);
6975
6976         if (!iwl3945_is_ready_rf(priv)) {
6977                 rc = -EIO;
6978                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6979                 goto out_unlock;
6980         }
6981
6982         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6983                 rc = -EIO;
6984                 IWL_ERROR("ERROR: APs don't scan\n");
6985                 goto out_unlock;
6986         }
6987
6988         /* we don't schedule scan within next_scan_jiffies period */
6989         if (priv->next_scan_jiffies &&
6990                         time_after(priv->next_scan_jiffies, jiffies)) {
6991                 rc = -EAGAIN;
6992                 goto out_unlock;
6993         }
6994         /* if we just finished scan ask for delay for a broadcast scan */
6995         if ((len == 0) && priv->last_scan_jiffies &&
6996             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
6997                        jiffies)) {
6998                 rc = -EAGAIN;
6999                 goto out_unlock;
7000         }
7001         if (len) {
7002                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7003                                iwl3945_escape_essid(ssid, len), (int)len);
7004
7005                 priv->one_direct_scan = 1;
7006                 priv->direct_ssid_len = (u8)
7007                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7008                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7009         } else
7010                 priv->one_direct_scan = 0;
7011
7012         rc = iwl3945_scan_initiate(priv);
7013
7014         IWL_DEBUG_MAC80211("leave\n");
7015
7016 out_unlock:
7017         spin_unlock_irqrestore(&priv->lock, flags);
7018         mutex_unlock(&priv->mutex);
7019
7020         return rc;
7021 }
7022
7023 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7024                            const u8 *local_addr, const u8 *addr,
7025                            struct ieee80211_key_conf *key)
7026 {
7027         struct iwl3945_priv *priv = hw->priv;
7028         int rc = 0;
7029         u8 sta_id;
7030
7031         IWL_DEBUG_MAC80211("enter\n");
7032
7033         if (!iwl3945_param_hwcrypto) {
7034                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7035                 return -EOPNOTSUPP;
7036         }
7037
7038         if (is_zero_ether_addr(addr))
7039                 /* only support pairwise keys */
7040                 return -EOPNOTSUPP;
7041
7042         sta_id = iwl3945_hw_find_station(priv, addr);
7043         if (sta_id == IWL_INVALID_STATION) {
7044                 DECLARE_MAC_BUF(mac);
7045
7046                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7047                                    print_mac(mac, addr));
7048                 return -EINVAL;
7049         }
7050
7051         mutex_lock(&priv->mutex);
7052
7053         iwl3945_scan_cancel_timeout(priv, 100);
7054
7055         switch (cmd) {
7056         case  SET_KEY:
7057                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7058                 if (!rc) {
7059                         iwl3945_set_rxon_hwcrypto(priv, 1);
7060                         iwl3945_commit_rxon(priv);
7061                         key->hw_key_idx = sta_id;
7062                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7063                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7064                 }
7065                 break;
7066         case DISABLE_KEY:
7067                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7068                 if (!rc) {
7069                         iwl3945_set_rxon_hwcrypto(priv, 0);
7070                         iwl3945_commit_rxon(priv);
7071                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7072                 }
7073                 break;
7074         default:
7075                 rc = -EINVAL;
7076         }
7077
7078         IWL_DEBUG_MAC80211("leave\n");
7079         mutex_unlock(&priv->mutex);
7080
7081         return rc;
7082 }
7083
7084 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
7085                            const struct ieee80211_tx_queue_params *params)
7086 {
7087         struct iwl3945_priv *priv = hw->priv;
7088         unsigned long flags;
7089         int q;
7090
7091         IWL_DEBUG_MAC80211("enter\n");
7092
7093         if (!iwl3945_is_ready_rf(priv)) {
7094                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7095                 return -EIO;
7096         }
7097
7098         if (queue >= AC_NUM) {
7099                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7100                 return 0;
7101         }
7102
7103         if (!priv->qos_data.qos_enable) {
7104                 priv->qos_data.qos_active = 0;
7105                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7106                 return 0;
7107         }
7108         q = AC_NUM - 1 - queue;
7109
7110         spin_lock_irqsave(&priv->lock, flags);
7111
7112         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7113         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7114         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7115         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7116                         cpu_to_le16((params->txop * 32));
7117
7118         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7119         priv->qos_data.qos_active = 1;
7120
7121         spin_unlock_irqrestore(&priv->lock, flags);
7122
7123         mutex_lock(&priv->mutex);
7124         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7125                 iwl3945_activate_qos(priv, 1);
7126         else if (priv->assoc_id && iwl3945_is_associated(priv))
7127                 iwl3945_activate_qos(priv, 0);
7128
7129         mutex_unlock(&priv->mutex);
7130
7131         IWL_DEBUG_MAC80211("leave\n");
7132         return 0;
7133 }
7134
7135 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7136                                 struct ieee80211_tx_queue_stats *stats)
7137 {
7138         struct iwl3945_priv *priv = hw->priv;
7139         int i, avail;
7140         struct iwl3945_tx_queue *txq;
7141         struct iwl3945_queue *q;
7142         unsigned long flags;
7143
7144         IWL_DEBUG_MAC80211("enter\n");
7145
7146         if (!iwl3945_is_ready_rf(priv)) {
7147                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7148                 return -EIO;
7149         }
7150
7151         spin_lock_irqsave(&priv->lock, flags);
7152
7153         for (i = 0; i < AC_NUM; i++) {
7154                 txq = &priv->txq[i];
7155                 q = &txq->q;
7156                 avail = iwl3945_queue_space(q);
7157
7158                 stats[i].len = q->n_window - avail;
7159                 stats[i].limit = q->n_window - q->high_mark;
7160                 stats[i].count = q->n_window;
7161
7162         }
7163         spin_unlock_irqrestore(&priv->lock, flags);
7164
7165         IWL_DEBUG_MAC80211("leave\n");
7166
7167         return 0;
7168 }
7169
7170 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7171                              struct ieee80211_low_level_stats *stats)
7172 {
7173         IWL_DEBUG_MAC80211("enter\n");
7174         IWL_DEBUG_MAC80211("leave\n");
7175
7176         return 0;
7177 }
7178
7179 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7180 {
7181         IWL_DEBUG_MAC80211("enter\n");
7182         IWL_DEBUG_MAC80211("leave\n");
7183
7184         return 0;
7185 }
7186
7187 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7188 {
7189         struct iwl3945_priv *priv = hw->priv;
7190         unsigned long flags;
7191
7192         mutex_lock(&priv->mutex);
7193         IWL_DEBUG_MAC80211("enter\n");
7194
7195         iwl3945_reset_qos(priv);
7196
7197         cancel_delayed_work(&priv->post_associate);
7198
7199         spin_lock_irqsave(&priv->lock, flags);
7200         priv->assoc_id = 0;
7201         priv->assoc_capability = 0;
7202         priv->call_post_assoc_from_beacon = 0;
7203
7204         /* new association get rid of ibss beacon skb */
7205         if (priv->ibss_beacon)
7206                 dev_kfree_skb(priv->ibss_beacon);
7207
7208         priv->ibss_beacon = NULL;
7209
7210         priv->beacon_int = priv->hw->conf.beacon_int;
7211         priv->timestamp1 = 0;
7212         priv->timestamp0 = 0;
7213         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7214                 priv->beacon_int = 0;
7215
7216         spin_unlock_irqrestore(&priv->lock, flags);
7217
7218         if (!iwl3945_is_ready_rf(priv)) {
7219                 IWL_DEBUG_MAC80211("leave - not ready\n");
7220                 mutex_unlock(&priv->mutex);
7221                 return;
7222         }
7223
7224         /* we are restarting association process
7225          * clear RXON_FILTER_ASSOC_MSK bit
7226         */
7227         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7228                 iwl3945_scan_cancel_timeout(priv, 100);
7229                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7230                 iwl3945_commit_rxon(priv);
7231         }
7232
7233         /* Per mac80211.h: This is only used in IBSS mode... */
7234         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7235
7236                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7237                 mutex_unlock(&priv->mutex);
7238                 return;
7239         }
7240
7241         iwl3945_set_rate(priv);
7242
7243         mutex_unlock(&priv->mutex);
7244
7245         IWL_DEBUG_MAC80211("leave\n");
7246
7247 }
7248
7249 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
7250 {
7251         struct iwl3945_priv *priv = hw->priv;
7252         unsigned long flags;
7253
7254         mutex_lock(&priv->mutex);
7255         IWL_DEBUG_MAC80211("enter\n");
7256
7257         if (!iwl3945_is_ready_rf(priv)) {
7258                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7259                 mutex_unlock(&priv->mutex);
7260                 return -EIO;
7261         }
7262
7263         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7264                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7265                 mutex_unlock(&priv->mutex);
7266                 return -EIO;
7267         }
7268
7269         spin_lock_irqsave(&priv->lock, flags);
7270
7271         if (priv->ibss_beacon)
7272                 dev_kfree_skb(priv->ibss_beacon);
7273
7274         priv->ibss_beacon = skb;
7275
7276         priv->assoc_id = 0;
7277
7278         IWL_DEBUG_MAC80211("leave\n");
7279         spin_unlock_irqrestore(&priv->lock, flags);
7280
7281         iwl3945_reset_qos(priv);
7282
7283         queue_work(priv->workqueue, &priv->post_associate.work);
7284
7285         mutex_unlock(&priv->mutex);
7286
7287         return 0;
7288 }
7289
7290 /*****************************************************************************
7291  *
7292  * sysfs attributes
7293  *
7294  *****************************************************************************/
7295
7296 #ifdef CONFIG_IWL3945_DEBUG
7297
7298 /*
7299  * The following adds a new attribute to the sysfs representation
7300  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7301  * used for controlling the debug level.
7302  *
7303  * See the level definitions in iwl for details.
7304  */
7305
7306 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7307 {
7308         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7309 }
7310 static ssize_t store_debug_level(struct device_driver *d,
7311                                  const char *buf, size_t count)
7312 {
7313         char *p = (char *)buf;
7314         u32 val;
7315
7316         val = simple_strtoul(p, &p, 0);
7317         if (p == buf)
7318                 printk(KERN_INFO DRV_NAME
7319                        ": %s is not in hex or decimal form.\n", buf);
7320         else
7321                 iwl3945_debug_level = val;
7322
7323         return strnlen(buf, count);
7324 }
7325
7326 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7327                    show_debug_level, store_debug_level);
7328
7329 #endif /* CONFIG_IWL3945_DEBUG */
7330
7331 static ssize_t show_temperature(struct device *d,
7332                                 struct device_attribute *attr, char *buf)
7333 {
7334         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7335
7336         if (!iwl3945_is_alive(priv))
7337                 return -EAGAIN;
7338
7339         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7340 }
7341
7342 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7343
7344 static ssize_t show_rs_window(struct device *d,
7345                               struct device_attribute *attr,
7346                               char *buf)
7347 {
7348         struct iwl3945_priv *priv = d->driver_data;
7349         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7350 }
7351 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7352
7353 static ssize_t show_tx_power(struct device *d,
7354                              struct device_attribute *attr, char *buf)
7355 {
7356         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7357         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7358 }
7359
7360 static ssize_t store_tx_power(struct device *d,
7361                               struct device_attribute *attr,
7362                               const char *buf, size_t count)
7363 {
7364         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7365         char *p = (char *)buf;
7366         u32 val;
7367
7368         val = simple_strtoul(p, &p, 10);
7369         if (p == buf)
7370                 printk(KERN_INFO DRV_NAME
7371                        ": %s is not in decimal form.\n", buf);
7372         else
7373                 iwl3945_hw_reg_set_txpower(priv, val);
7374
7375         return count;
7376 }
7377
7378 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7379
7380 static ssize_t show_flags(struct device *d,
7381                           struct device_attribute *attr, char *buf)
7382 {
7383         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7384
7385         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7386 }
7387
7388 static ssize_t store_flags(struct device *d,
7389                            struct device_attribute *attr,
7390                            const char *buf, size_t count)
7391 {
7392         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7393         u32 flags = simple_strtoul(buf, NULL, 0);
7394
7395         mutex_lock(&priv->mutex);
7396         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7397                 /* Cancel any currently running scans... */
7398                 if (iwl3945_scan_cancel_timeout(priv, 100))
7399                         IWL_WARNING("Could not cancel scan.\n");
7400                 else {
7401                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7402                                        flags);
7403                         priv->staging_rxon.flags = cpu_to_le32(flags);
7404                         iwl3945_commit_rxon(priv);
7405                 }
7406         }
7407         mutex_unlock(&priv->mutex);
7408
7409         return count;
7410 }
7411
7412 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7413
7414 static ssize_t show_filter_flags(struct device *d,
7415                                  struct device_attribute *attr, char *buf)
7416 {
7417         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7418
7419         return sprintf(buf, "0x%04X\n",
7420                 le32_to_cpu(priv->active_rxon.filter_flags));
7421 }
7422
7423 static ssize_t store_filter_flags(struct device *d,
7424                                   struct device_attribute *attr,
7425                                   const char *buf, size_t count)
7426 {
7427         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7428         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7429
7430         mutex_lock(&priv->mutex);
7431         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7432                 /* Cancel any currently running scans... */
7433                 if (iwl3945_scan_cancel_timeout(priv, 100))
7434                         IWL_WARNING("Could not cancel scan.\n");
7435                 else {
7436                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7437                                        "0x%04X\n", filter_flags);
7438                         priv->staging_rxon.filter_flags =
7439                                 cpu_to_le32(filter_flags);
7440                         iwl3945_commit_rxon(priv);
7441                 }
7442         }
7443         mutex_unlock(&priv->mutex);
7444
7445         return count;
7446 }
7447
7448 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7449                    store_filter_flags);
7450
7451 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7452
7453 static ssize_t show_measurement(struct device *d,
7454                                 struct device_attribute *attr, char *buf)
7455 {
7456         struct iwl3945_priv *priv = dev_get_drvdata(d);
7457         struct iwl3945_spectrum_notification measure_report;
7458         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7459         u8 *data = (u8 *) & measure_report;
7460         unsigned long flags;
7461
7462         spin_lock_irqsave(&priv->lock, flags);
7463         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7464                 spin_unlock_irqrestore(&priv->lock, flags);
7465                 return 0;
7466         }
7467         memcpy(&measure_report, &priv->measure_report, size);
7468         priv->measurement_status = 0;
7469         spin_unlock_irqrestore(&priv->lock, flags);
7470
7471         while (size && (PAGE_SIZE - len)) {
7472                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7473                                    PAGE_SIZE - len, 1);
7474                 len = strlen(buf);
7475                 if (PAGE_SIZE - len)
7476                         buf[len++] = '\n';
7477
7478                 ofs += 16;
7479                 size -= min(size, 16U);
7480         }
7481
7482         return len;
7483 }
7484
7485 static ssize_t store_measurement(struct device *d,
7486                                  struct device_attribute *attr,
7487                                  const char *buf, size_t count)
7488 {
7489         struct iwl3945_priv *priv = dev_get_drvdata(d);
7490         struct ieee80211_measurement_params params = {
7491                 .channel = le16_to_cpu(priv->active_rxon.channel),
7492                 .start_time = cpu_to_le64(priv->last_tsf),
7493                 .duration = cpu_to_le16(1),
7494         };
7495         u8 type = IWL_MEASURE_BASIC;
7496         u8 buffer[32];
7497         u8 channel;
7498
7499         if (count) {
7500                 char *p = buffer;
7501                 strncpy(buffer, buf, min(sizeof(buffer), count));
7502                 channel = simple_strtoul(p, NULL, 0);
7503                 if (channel)
7504                         params.channel = channel;
7505
7506                 p = buffer;
7507                 while (*p && *p != ' ')
7508                         p++;
7509                 if (*p)
7510                         type = simple_strtoul(p + 1, NULL, 0);
7511         }
7512
7513         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7514                        "channel %d (for '%s')\n", type, params.channel, buf);
7515         iwl3945_get_measurement(priv, &params, type);
7516
7517         return count;
7518 }
7519
7520 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7521                    show_measurement, store_measurement);
7522 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7523
7524 static ssize_t store_retry_rate(struct device *d,
7525                                 struct device_attribute *attr,
7526                                 const char *buf, size_t count)
7527 {
7528         struct iwl3945_priv *priv = dev_get_drvdata(d);
7529
7530         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7531         if (priv->retry_rate <= 0)
7532                 priv->retry_rate = 1;
7533
7534         return count;
7535 }
7536
7537 static ssize_t show_retry_rate(struct device *d,
7538                                struct device_attribute *attr, char *buf)
7539 {
7540         struct iwl3945_priv *priv = dev_get_drvdata(d);
7541         return sprintf(buf, "%d", priv->retry_rate);
7542 }
7543
7544 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7545                    store_retry_rate);
7546
7547 static ssize_t store_power_level(struct device *d,
7548                                  struct device_attribute *attr,
7549                                  const char *buf, size_t count)
7550 {
7551         struct iwl3945_priv *priv = dev_get_drvdata(d);
7552         int rc;
7553         int mode;
7554
7555         mode = simple_strtoul(buf, NULL, 0);
7556         mutex_lock(&priv->mutex);
7557
7558         if (!iwl3945_is_ready(priv)) {
7559                 rc = -EAGAIN;
7560                 goto out;
7561         }
7562
7563         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7564                 mode = IWL_POWER_AC;
7565         else
7566                 mode |= IWL_POWER_ENABLED;
7567
7568         if (mode != priv->power_mode) {
7569                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7570                 if (rc) {
7571                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7572                         goto out;
7573                 }
7574                 priv->power_mode = mode;
7575         }
7576
7577         rc = count;
7578
7579  out:
7580         mutex_unlock(&priv->mutex);
7581         return rc;
7582 }
7583
7584 #define MAX_WX_STRING 80
7585
7586 /* Values are in microsecond */
7587 static const s32 timeout_duration[] = {
7588         350000,
7589         250000,
7590         75000,
7591         37000,
7592         25000,
7593 };
7594 static const s32 period_duration[] = {
7595         400000,
7596         700000,
7597         1000000,
7598         1000000,
7599         1000000
7600 };
7601
7602 static ssize_t show_power_level(struct device *d,
7603                                 struct device_attribute *attr, char *buf)
7604 {
7605         struct iwl3945_priv *priv = dev_get_drvdata(d);
7606         int level = IWL_POWER_LEVEL(priv->power_mode);
7607         char *p = buf;
7608
7609         p += sprintf(p, "%d ", level);
7610         switch (level) {
7611         case IWL_POWER_MODE_CAM:
7612         case IWL_POWER_AC:
7613                 p += sprintf(p, "(AC)");
7614                 break;
7615         case IWL_POWER_BATTERY:
7616                 p += sprintf(p, "(BATTERY)");
7617                 break;
7618         default:
7619                 p += sprintf(p,
7620                              "(Timeout %dms, Period %dms)",
7621                              timeout_duration[level - 1] / 1000,
7622                              period_duration[level - 1] / 1000);
7623         }
7624
7625         if (!(priv->power_mode & IWL_POWER_ENABLED))
7626                 p += sprintf(p, " OFF\n");
7627         else
7628                 p += sprintf(p, " \n");
7629
7630         return (p - buf + 1);
7631
7632 }
7633
7634 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7635                    store_power_level);
7636
7637 static ssize_t show_channels(struct device *d,
7638                              struct device_attribute *attr, char *buf)
7639 {
7640         /* all this shit doesn't belong into sysfs anyway */
7641         return 0;
7642 }
7643
7644 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7645
7646 static ssize_t show_statistics(struct device *d,
7647                                struct device_attribute *attr, char *buf)
7648 {
7649         struct iwl3945_priv *priv = dev_get_drvdata(d);
7650         u32 size = sizeof(struct iwl3945_notif_statistics);
7651         u32 len = 0, ofs = 0;
7652         u8 *data = (u8 *) & priv->statistics;
7653         int rc = 0;
7654
7655         if (!iwl3945_is_alive(priv))
7656                 return -EAGAIN;
7657
7658         mutex_lock(&priv->mutex);
7659         rc = iwl3945_send_statistics_request(priv);
7660         mutex_unlock(&priv->mutex);
7661
7662         if (rc) {
7663                 len = sprintf(buf,
7664                               "Error sending statistics request: 0x%08X\n", rc);
7665                 return len;
7666         }
7667
7668         while (size && (PAGE_SIZE - len)) {
7669                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7670                                    PAGE_SIZE - len, 1);
7671                 len = strlen(buf);
7672                 if (PAGE_SIZE - len)
7673                         buf[len++] = '\n';
7674
7675                 ofs += 16;
7676                 size -= min(size, 16U);
7677         }
7678
7679         return len;
7680 }
7681
7682 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7683
7684 static ssize_t show_antenna(struct device *d,
7685                             struct device_attribute *attr, char *buf)
7686 {
7687         struct iwl3945_priv *priv = dev_get_drvdata(d);
7688
7689         if (!iwl3945_is_alive(priv))
7690                 return -EAGAIN;
7691
7692         return sprintf(buf, "%d\n", priv->antenna);
7693 }
7694
7695 static ssize_t store_antenna(struct device *d,
7696                              struct device_attribute *attr,
7697                              const char *buf, size_t count)
7698 {
7699         int ant;
7700         struct iwl3945_priv *priv = dev_get_drvdata(d);
7701
7702         if (count == 0)
7703                 return 0;
7704
7705         if (sscanf(buf, "%1i", &ant) != 1) {
7706                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7707                 return count;
7708         }
7709
7710         if ((ant >= 0) && (ant <= 2)) {
7711                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7712                 priv->antenna = (enum iwl3945_antenna)ant;
7713         } else
7714                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7715
7716
7717         return count;
7718 }
7719
7720 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7721
7722 static ssize_t show_status(struct device *d,
7723                            struct device_attribute *attr, char *buf)
7724 {
7725         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7726         if (!iwl3945_is_alive(priv))
7727                 return -EAGAIN;
7728         return sprintf(buf, "0x%08x\n", (int)priv->status);
7729 }
7730
7731 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7732
7733 static ssize_t dump_error_log(struct device *d,
7734                               struct device_attribute *attr,
7735                               const char *buf, size_t count)
7736 {
7737         char *p = (char *)buf;
7738
7739         if (p[0] == '1')
7740                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7741
7742         return strnlen(buf, count);
7743 }
7744
7745 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7746
7747 static ssize_t dump_event_log(struct device *d,
7748                               struct device_attribute *attr,
7749                               const char *buf, size_t count)
7750 {
7751         char *p = (char *)buf;
7752
7753         if (p[0] == '1')
7754                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7755
7756         return strnlen(buf, count);
7757 }
7758
7759 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7760
7761 /*****************************************************************************
7762  *
7763  * driver setup and teardown
7764  *
7765  *****************************************************************************/
7766
7767 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7768 {
7769         priv->workqueue = create_workqueue(DRV_NAME);
7770
7771         init_waitqueue_head(&priv->wait_command_queue);
7772
7773         INIT_WORK(&priv->up, iwl3945_bg_up);
7774         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7775         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7776         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7777         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7778         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7779         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7780         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7781         INIT_WORK(&priv->set_monitor, iwl3945_bg_set_monitor);
7782         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
7783         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7784         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7785         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7786
7787         iwl3945_hw_setup_deferred_work(priv);
7788
7789         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7790                      iwl3945_irq_tasklet, (unsigned long)priv);
7791 }
7792
7793 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7794 {
7795         iwl3945_hw_cancel_deferred_work(priv);
7796
7797         cancel_delayed_work_sync(&priv->init_alive_start);
7798         cancel_delayed_work(&priv->scan_check);
7799         cancel_delayed_work(&priv->alive_start);
7800         cancel_delayed_work(&priv->post_associate);
7801         cancel_work_sync(&priv->beacon_update);
7802 }
7803
7804 static struct attribute *iwl3945_sysfs_entries[] = {
7805         &dev_attr_antenna.attr,
7806         &dev_attr_channels.attr,
7807         &dev_attr_dump_errors.attr,
7808         &dev_attr_dump_events.attr,
7809         &dev_attr_flags.attr,
7810         &dev_attr_filter_flags.attr,
7811 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7812         &dev_attr_measurement.attr,
7813 #endif
7814         &dev_attr_power_level.attr,
7815         &dev_attr_retry_rate.attr,
7816         &dev_attr_rs_window.attr,
7817         &dev_attr_statistics.attr,
7818         &dev_attr_status.attr,
7819         &dev_attr_temperature.attr,
7820         &dev_attr_tx_power.attr,
7821
7822         NULL
7823 };
7824
7825 static struct attribute_group iwl3945_attribute_group = {
7826         .name = NULL,           /* put in device directory */
7827         .attrs = iwl3945_sysfs_entries,
7828 };
7829
7830 static struct ieee80211_ops iwl3945_hw_ops = {
7831         .tx = iwl3945_mac_tx,
7832         .start = iwl3945_mac_start,
7833         .stop = iwl3945_mac_stop,
7834         .add_interface = iwl3945_mac_add_interface,
7835         .remove_interface = iwl3945_mac_remove_interface,
7836         .config = iwl3945_mac_config,
7837         .config_interface = iwl3945_mac_config_interface,
7838         .configure_filter = iwl3945_configure_filter,
7839         .set_key = iwl3945_mac_set_key,
7840         .get_stats = iwl3945_mac_get_stats,
7841         .get_tx_stats = iwl3945_mac_get_tx_stats,
7842         .conf_tx = iwl3945_mac_conf_tx,
7843         .get_tsf = iwl3945_mac_get_tsf,
7844         .reset_tsf = iwl3945_mac_reset_tsf,
7845         .hw_scan = iwl3945_mac_hw_scan
7846 };
7847
7848 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7849 {
7850         int err = 0;
7851         struct iwl3945_priv *priv;
7852         struct ieee80211_hw *hw;
7853         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7854         unsigned long flags;
7855         DECLARE_MAC_BUF(mac);
7856
7857         /* Disabling hardware scan means that mac80211 will perform scans
7858          * "the hard way", rather than using device's scan. */
7859         if (iwl3945_param_disable_hw_scan) {
7860                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7861                 iwl3945_hw_ops.hw_scan = NULL;
7862         }
7863
7864         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7865             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7866                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7867                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7868                 err = -EINVAL;
7869                 goto out;
7870         }
7871
7872         /* mac80211 allocates memory for this device instance, including
7873          *   space for this driver's private structure */
7874         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7875         if (hw == NULL) {
7876                 IWL_ERROR("Can not allocate network device\n");
7877                 err = -ENOMEM;
7878                 goto out;
7879         }
7880         SET_IEEE80211_DEV(hw, &pdev->dev);
7881
7882         hw->rate_control_algorithm = "iwl-3945-rs";
7883
7884         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7885         priv = hw->priv;
7886         priv->hw = hw;
7887
7888         priv->pci_dev = pdev;
7889         priv->cfg = cfg;
7890
7891         /* Select antenna (may be helpful if only one antenna is connected) */
7892         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7893 #ifdef CONFIG_IWL3945_DEBUG
7894         iwl3945_debug_level = iwl3945_param_debug;
7895         atomic_set(&priv->restrict_refcnt, 0);
7896 #endif
7897         priv->retry_rate = 1;
7898
7899         priv->ibss_beacon = NULL;
7900
7901         /* Tell mac80211 our characteristics */
7902         hw->flags = IEEE80211_HW_SIGNAL_DBM |
7903                     IEEE80211_HW_NOISE_DBM;
7904
7905         /* 4 EDCA QOS priorities */
7906         hw->queues = 4;
7907
7908         spin_lock_init(&priv->lock);
7909         spin_lock_init(&priv->power_data.lock);
7910         spin_lock_init(&priv->sta_lock);
7911         spin_lock_init(&priv->hcmd_lock);
7912
7913         INIT_LIST_HEAD(&priv->free_frames);
7914
7915         mutex_init(&priv->mutex);
7916         if (pci_enable_device(pdev)) {
7917                 err = -ENODEV;
7918                 goto out_ieee80211_free_hw;
7919         }
7920
7921         pci_set_master(pdev);
7922
7923         /* Clear the driver's (not device's) station table */
7924         iwl3945_clear_stations_table(priv);
7925
7926         priv->data_retry_limit = -1;
7927         priv->ieee_channels = NULL;
7928         priv->ieee_rates = NULL;
7929         priv->band = IEEE80211_BAND_2GHZ;
7930
7931         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7932         if (!err)
7933                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7934         if (err) {
7935                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
7936                 goto out_pci_disable_device;
7937         }
7938
7939         pci_set_drvdata(pdev, priv);
7940         err = pci_request_regions(pdev, DRV_NAME);
7941         if (err)
7942                 goto out_pci_disable_device;
7943
7944         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7945          * PCI Tx retries from interfering with C3 CPU state */
7946         pci_write_config_byte(pdev, 0x41, 0x00);
7947
7948         priv->hw_base = pci_iomap(pdev, 0, 0);
7949         if (!priv->hw_base) {
7950                 err = -ENODEV;
7951                 goto out_pci_release_regions;
7952         }
7953
7954         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7955                         (unsigned long long) pci_resource_len(pdev, 0));
7956         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7957
7958         /* Initialize module parameter values here */
7959
7960         /* Disable radio (SW RF KILL) via parameter when loading driver */
7961         if (iwl3945_param_disable) {
7962                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7963                 IWL_DEBUG_INFO("Radio disabled.\n");
7964         }
7965
7966         priv->iw_mode = IEEE80211_IF_TYPE_STA;
7967
7968         printk(KERN_INFO DRV_NAME
7969                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7970
7971         /* Device-specific setup */
7972         if (iwl3945_hw_set_hw_setting(priv)) {
7973                 IWL_ERROR("failed to set hw settings\n");
7974                 goto out_iounmap;
7975         }
7976
7977         if (iwl3945_param_qos_enable)
7978                 priv->qos_data.qos_enable = 1;
7979
7980         iwl3945_reset_qos(priv);
7981
7982         priv->qos_data.qos_active = 0;
7983         priv->qos_data.qos_cap.val = 0;
7984
7985         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
7986         iwl3945_setup_deferred_work(priv);
7987         iwl3945_setup_rx_handlers(priv);
7988
7989         priv->rates_mask = IWL_RATES_MASK;
7990         /* If power management is turned on, default to AC mode */
7991         priv->power_mode = IWL_POWER_AC;
7992         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
7993
7994         spin_lock_irqsave(&priv->lock, flags);
7995         iwl3945_disable_interrupts(priv);
7996         spin_unlock_irqrestore(&priv->lock, flags);
7997
7998         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
7999         if (err) {
8000                 IWL_ERROR("failed to create sysfs device attributes\n");
8001                 goto out_release_irq;
8002         }
8003
8004         /* nic init */
8005         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8006                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8007
8008         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8009         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8010                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8011                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8012         if (err < 0) {
8013                 IWL_DEBUG_INFO("Failed to init the card\n");
8014                 goto out_remove_sysfs;
8015         }
8016         /* Read the EEPROM */
8017         err = iwl3945_eeprom_init(priv);
8018         if (err) {
8019                 IWL_ERROR("Unable to init EEPROM\n");
8020                 goto out_remove_sysfs;
8021         }
8022         /* MAC Address location in EEPROM same for 3945/4965 */
8023         get_eeprom_mac(priv, priv->mac_addr);
8024         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8025         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8026
8027         err = iwl3945_init_channel_map(priv);
8028         if (err) {
8029                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8030                 goto out_remove_sysfs;
8031         }
8032
8033         err = iwl3945_init_geos(priv);
8034         if (err) {
8035                 IWL_ERROR("initializing geos failed: %d\n", err);
8036                 goto out_free_channel_map;
8037         }
8038
8039         err = ieee80211_register_hw(priv->hw);
8040         if (err) {
8041                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8042                 goto out_free_geos;
8043         }
8044
8045         priv->hw->conf.beacon_int = 100;
8046         priv->mac80211_registered = 1;
8047         pci_save_state(pdev);
8048         pci_disable_device(pdev);
8049
8050         err = iwl3945_rfkill_init(priv);
8051         if (err)
8052                 IWL_ERROR("Unable to initialize RFKILL system. "
8053                                   "Ignoring error: %d\n", err);
8054
8055         return 0;
8056
8057  out_free_geos:
8058         iwl3945_free_geos(priv);
8059  out_free_channel_map:
8060         iwl3945_free_channel_map(priv);
8061  out_remove_sysfs:
8062         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8063
8064  out_release_irq:
8065         destroy_workqueue(priv->workqueue);
8066         priv->workqueue = NULL;
8067         iwl3945_unset_hw_setting(priv);
8068
8069  out_iounmap:
8070         pci_iounmap(pdev, priv->hw_base);
8071  out_pci_release_regions:
8072         pci_release_regions(pdev);
8073  out_pci_disable_device:
8074         pci_disable_device(pdev);
8075         pci_set_drvdata(pdev, NULL);
8076  out_ieee80211_free_hw:
8077         ieee80211_free_hw(priv->hw);
8078  out:
8079         return err;
8080 }
8081
8082 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8083 {
8084         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8085         unsigned long flags;
8086
8087         if (!priv)
8088                 return;
8089
8090         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8091
8092         set_bit(STATUS_EXIT_PENDING, &priv->status);
8093
8094         iwl3945_down(priv);
8095
8096         /* make sure we flush any pending irq or
8097          * tasklet for the driver
8098          */
8099         spin_lock_irqsave(&priv->lock, flags);
8100         iwl3945_disable_interrupts(priv);
8101         spin_unlock_irqrestore(&priv->lock, flags);
8102
8103         iwl_synchronize_irq(priv);
8104
8105         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8106
8107         iwl3945_rfkill_unregister(priv);
8108         iwl3945_dealloc_ucode_pci(priv);
8109
8110         if (priv->rxq.bd)
8111                 iwl3945_rx_queue_free(priv, &priv->rxq);
8112         iwl3945_hw_txq_ctx_free(priv);
8113
8114         iwl3945_unset_hw_setting(priv);
8115         iwl3945_clear_stations_table(priv);
8116
8117         if (priv->mac80211_registered) {
8118                 ieee80211_unregister_hw(priv->hw);
8119         }
8120
8121         /*netif_stop_queue(dev); */
8122         flush_workqueue(priv->workqueue);
8123
8124         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8125          * priv->workqueue... so we can't take down the workqueue
8126          * until now... */
8127         destroy_workqueue(priv->workqueue);
8128         priv->workqueue = NULL;
8129
8130         pci_iounmap(pdev, priv->hw_base);
8131         pci_release_regions(pdev);
8132         pci_disable_device(pdev);
8133         pci_set_drvdata(pdev, NULL);
8134
8135         iwl3945_free_channel_map(priv);
8136         iwl3945_free_geos(priv);
8137         kfree(priv->scan);
8138         if (priv->ibss_beacon)
8139                 dev_kfree_skb(priv->ibss_beacon);
8140
8141         ieee80211_free_hw(priv->hw);
8142 }
8143
8144 #ifdef CONFIG_PM
8145
8146 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8147 {
8148         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8149
8150         if (priv->is_open) {
8151                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8152                 iwl3945_mac_stop(priv->hw);
8153                 priv->is_open = 1;
8154         }
8155
8156         pci_set_power_state(pdev, PCI_D3hot);
8157
8158         return 0;
8159 }
8160
8161 static int iwl3945_pci_resume(struct pci_dev *pdev)
8162 {
8163         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8164
8165         pci_set_power_state(pdev, PCI_D0);
8166
8167         if (priv->is_open)
8168                 iwl3945_mac_start(priv->hw);
8169
8170         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8171         return 0;
8172 }
8173
8174 #endif /* CONFIG_PM */
8175
8176 /*************** RFKILL FUNCTIONS **********/
8177 #ifdef CONFIG_IWL3945_RFKILL
8178 /* software rf-kill from user */
8179 static int iwl3945_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
8180 {
8181         struct iwl3945_priv *priv = data;
8182         int err = 0;
8183
8184         if (!priv->rfkill)
8185         return 0;
8186
8187         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
8188                 return 0;
8189
8190         IWL_DEBUG_RF_KILL("we recieved soft RFKILL set to state %d\n", state);
8191         mutex_lock(&priv->mutex);
8192
8193         switch (state) {
8194         case RFKILL_STATE_UNBLOCKED:
8195                 if (iwl3945_is_rfkill_hw(priv)) {
8196                         err = -EBUSY;
8197                         goto out_unlock;
8198                 }
8199                 iwl3945_radio_kill_sw(priv, 0);
8200                 break;
8201         case RFKILL_STATE_SOFT_BLOCKED:
8202                 iwl3945_radio_kill_sw(priv, 1);
8203                 break;
8204         default:
8205                 IWL_WARNING("we recieved unexpected RFKILL state %d\n", state);
8206                 break;
8207         }
8208 out_unlock:
8209         mutex_unlock(&priv->mutex);
8210
8211         return err;
8212 }
8213
8214 int iwl3945_rfkill_init(struct iwl3945_priv *priv)
8215 {
8216         struct device *device = wiphy_dev(priv->hw->wiphy);
8217         int ret = 0;
8218
8219         BUG_ON(device == NULL);
8220
8221         IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
8222         priv->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
8223         if (!priv->rfkill) {
8224                 IWL_ERROR("Unable to allocate rfkill device.\n");
8225                 ret = -ENOMEM;
8226                 goto error;
8227         }
8228
8229         priv->rfkill->name = priv->cfg->name;
8230         priv->rfkill->data = priv;
8231         priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
8232         priv->rfkill->toggle_radio = iwl3945_rfkill_soft_rf_kill;
8233         priv->rfkill->user_claim_unsupported = 1;
8234
8235         priv->rfkill->dev.class->suspend = NULL;
8236         priv->rfkill->dev.class->resume = NULL;
8237
8238         ret = rfkill_register(priv->rfkill);
8239         if (ret) {
8240                 IWL_ERROR("Unable to register rfkill: %d\n", ret);
8241                 goto freed_rfkill;
8242         }
8243
8244         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8245         return ret;
8246
8247 freed_rfkill:
8248         if (priv->rfkill != NULL)
8249                 rfkill_free(priv->rfkill);
8250         priv->rfkill = NULL;
8251
8252 error:
8253         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8254         return ret;
8255 }
8256
8257 void iwl3945_rfkill_unregister(struct iwl3945_priv *priv)
8258 {
8259         if (priv->rfkill)
8260                 rfkill_unregister(priv->rfkill);
8261
8262         priv->rfkill = NULL;
8263 }
8264
8265 /* set rf-kill to the right state. */
8266 void iwl3945_rfkill_set_hw_state(struct iwl3945_priv *priv)
8267 {
8268
8269         if (!priv->rfkill)
8270                 return;
8271
8272         if (iwl3945_is_rfkill_hw(priv)) {
8273                 rfkill_force_state(priv->rfkill, RFKILL_STATE_HARD_BLOCKED);
8274                 return;
8275         }
8276
8277         if (!iwl3945_is_rfkill_sw(priv))
8278                 rfkill_force_state(priv->rfkill, RFKILL_STATE_UNBLOCKED);
8279         else
8280                 rfkill_force_state(priv->rfkill, RFKILL_STATE_SOFT_BLOCKED);
8281 }
8282 #endif
8283
8284 /*****************************************************************************
8285  *
8286  * driver and module entry point
8287  *
8288  *****************************************************************************/
8289
8290 static struct pci_driver iwl3945_driver = {
8291         .name = DRV_NAME,
8292         .id_table = iwl3945_hw_card_ids,
8293         .probe = iwl3945_pci_probe,
8294         .remove = __devexit_p(iwl3945_pci_remove),
8295 #ifdef CONFIG_PM
8296         .suspend = iwl3945_pci_suspend,
8297         .resume = iwl3945_pci_resume,
8298 #endif
8299 };
8300
8301 static int __init iwl3945_init(void)
8302 {
8303
8304         int ret;
8305         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8306         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8307
8308         ret = iwl3945_rate_control_register();
8309         if (ret) {
8310                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8311                 return ret;
8312         }
8313
8314         ret = pci_register_driver(&iwl3945_driver);
8315         if (ret) {
8316                 IWL_ERROR("Unable to initialize PCI module\n");
8317                 goto error_register;
8318         }
8319 #ifdef CONFIG_IWL3945_DEBUG
8320         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8321         if (ret) {
8322                 IWL_ERROR("Unable to create driver sysfs file\n");
8323                 goto error_debug;
8324         }
8325 #endif
8326
8327         return ret;
8328
8329 #ifdef CONFIG_IWL3945_DEBUG
8330 error_debug:
8331         pci_unregister_driver(&iwl3945_driver);
8332 #endif
8333 error_register:
8334         iwl3945_rate_control_unregister();
8335         return ret;
8336 }
8337
8338 static void __exit iwl3945_exit(void)
8339 {
8340 #ifdef CONFIG_IWL3945_DEBUG
8341         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8342 #endif
8343         pci_unregister_driver(&iwl3945_driver);
8344         iwl3945_rate_control_unregister();
8345 }
8346
8347 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8348 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8349 module_param_named(disable, iwl3945_param_disable, int, 0444);
8350 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8351 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8352 MODULE_PARM_DESC(hwcrypto,
8353                  "using hardware crypto engine (default 0 [software])\n");
8354 module_param_named(debug, iwl3945_param_debug, int, 0444);
8355 MODULE_PARM_DESC(debug, "debug output mask");
8356 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8357 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8358
8359 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8360 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8361
8362 /* QoS */
8363 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8364 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8365
8366 module_exit(iwl3945_exit);
8367 module_init(iwl3945_init);