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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 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 = IWL_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) 2003-2007 Intel Corporation"
  97 #define DRV_VERSION     IWLWIFI_VERSION
  98
  99
 100 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 101 MODULE_VERSION(DRV_VERSION);
 102 MODULE_AUTHOR(DRV_COPYRIGHT);
 103 MODULE_LICENSE("GPL");
 104
 105 static __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 106 {
 107         u16 fc = le16_to_cpu(hdr->frame_control);
 108         int hdr_len = ieee80211_get_hdrlen(fc);
 109
 110         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 111                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 112         return NULL;
 113 }
 114
 115 static const struct ieee80211_supported_band *iwl3945_get_band(
 116                 struct iwl3945_priv *priv, enum ieee80211_band band)
 117 {
 118         return priv->hw->wiphy->bands[band];
 119 }
 120
 121 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 122 {
 123         /* Single white space is for Linksys APs */
 124         if (essid_len == 1 && essid[0] == ' ')
 125                 return 1;
 126
 127         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 128         while (essid_len) {
 129                 essid_len--;
 130                 if (essid[essid_len] != '\0')
 131                         return 0;
 132         }
 133
 134         return 1;
 135 }
 136
 137 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 138 {
 139         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 140         const char *s = essid;
 141         char *d = escaped;
 142
 143         if (iwl3945_is_empty_essid(essid, essid_len)) {
 144                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 145                 return escaped;
 146         }
 147
 148         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 149         while (essid_len--) {
 150                 if (*s == '\0') {
 151                         *d++ = '\\';
 152                         *d++ = '0';
 153                         s++;
 154                 } else
 155                         *d++ = *s++;
 156         }
 157         *d = '\0';
 158         return escaped;
 159 }
 160
 161 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 162  * DMA services
 163  *
 164  * Theory of operation
 165  *
 166  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 167  * of buffer descriptors, each of which points to one or more data buffers for
 168  * the device to read from or fill.  Driver and device exchange status of each
 169  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 170  * entries in each circular buffer, to protect against confusing empty and full
 171  * queue states.
 172  *
 173  * The device reads or writes the data in the queues via the device's several
 174  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 175  *
 176  * For Tx queue, there are low mark and high mark limits. If, after queuing
 177  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 178  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 179  * Tx queue resumed.
 180  *
 181  * The 3945 operates with six queues:  One receive queue, one transmit queue
 182  * (#4) for sending commands to the device firmware, and four transmit queues
 183  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 184  ***************************************************/
 185
 186 int iwl3945_queue_space(const struct iwl3945_queue *q)
 187 {
 188         int s = q->read_ptr - q->write_ptr;
 189
 190         if (q->read_ptr > q->write_ptr)
 191                 s -= q->n_bd;
 192
 193         if (s <= 0)
 194                 s += q->n_window;
 195         /* keep some reserve to not confuse empty and full situations */
 196         s -= 2;
 197         if (s < 0)
 198                 s = 0;
 199         return s;
 200 }
 201
 202 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 203 {
 204         return q->write_ptr > q->read_ptr ?
 205                 (i >= q->read_ptr && i < q->write_ptr) :
 206                 !(i < q->read_ptr && i >= q->write_ptr);
 207 }
 208
 209
 210 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 211 {
 212         /* This is for scan command, the big buffer at end of command array */
 213         if (is_huge)
 214                 return q->n_window;     /* must be power of 2 */
 215
 216         /* Otherwise, use normal size buffers */
 217         return index & (q->n_window - 1);
 218 }
 219
 220 /**
 221  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 222  */
 223 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 224                           int count, int slots_num, u32 id)
 225 {
 226         q->n_bd = count;
 227         q->n_window = slots_num;
 228         q->id = id;
 229
 230         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 231          * and iwl_queue_dec_wrap are broken. */
 232         BUG_ON(!is_power_of_2(count));
 233
 234         /* slots_num must be power-of-two size, otherwise
 235          * get_cmd_index is broken. */
 236         BUG_ON(!is_power_of_2(slots_num));
 237
 238         q->low_mark = q->n_window / 4;
 239         if (q->low_mark < 4)
 240                 q->low_mark = 4;
 241
 242         q->high_mark = q->n_window / 8;
 243         if (q->high_mark < 2)
 244                 q->high_mark = 2;
 245
 246         q->write_ptr = q->read_ptr = 0;
 247
 248         return 0;
 249 }
 250
 251 /**
 252  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 253  */
 254 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 255                               struct iwl3945_tx_queue *txq, u32 id)
 256 {
 257         struct pci_dev *dev = priv->pci_dev;
 258
 259         /* Driver private data, only for Tx (not command) queues,
 260          * not shared with device. */
 261         if (id != IWL_CMD_QUEUE_NUM) {
 262                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 263                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 264                 if (!txq->txb) {
 265                         IWL_ERROR("kmalloc for auxiliary BD "
 266                                   "structures failed\n");
 267                         goto error;
 268                 }
 269         } else
 270                 txq->txb = NULL;
 271
 272         /* Circular buffer of transmit frame descriptors (TFDs),
 273          * shared with device */
 274         txq->bd = pci_alloc_consistent(dev,
 275                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 276                         &txq->q.dma_addr);
 277
 278         if (!txq->bd) {
 279                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 280                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 281                 goto error;
 282         }
 283         txq->q.id = id;
 284
 285         return 0;
 286
 287  error:
 288         if (txq->txb) {
 289                 kfree(txq->txb);
 290                 txq->txb = NULL;
 291         }
 292
 293         return -ENOMEM;
 294 }
 295
 296 /**
 297  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 298  */
 299 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 300                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 301 {
 302         struct pci_dev *dev = priv->pci_dev;
 303         int len;
 304         int rc = 0;
 305
 306         /*
 307          * Alloc buffer array for commands (Tx or other types of commands).
 308          * For the command queue (#4), allocate command space + one big
 309          * command for scan, since scan command is very huge; the system will
 310          * not have two scans at the same time, so only one is needed.
 311          * For data Tx queues (all other queues), no super-size command
 312          * space is needed.
 313          */
 314         len = sizeof(struct iwl3945_cmd) * slots_num;
 315         if (txq_id == IWL_CMD_QUEUE_NUM)
 316                 len +=  IWL_MAX_SCAN_SIZE;
 317         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 318         if (!txq->cmd)
 319                 return -ENOMEM;
 320
 321         /* Alloc driver data array and TFD circular buffer */
 322         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 323         if (rc) {
 324                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 325
 326                 return -ENOMEM;
 327         }
 328         txq->need_update = 0;
 329
 330         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 331          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 332         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 333
 334         /* Initialize queue high/low-water, head/tail indexes */
 335         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 336
 337         /* Tell device where to find queue, enable DMA channel. */
 338         iwl3945_hw_tx_queue_init(priv, txq);
 339
 340         return 0;
 341 }
 342
 343 /**
 344  * iwl3945_tx_queue_free - Deallocate DMA queue.
 345  * @txq: Transmit queue to deallocate.
 346  *
 347  * Empty queue by removing and destroying all BD's.
 348  * Free all buffers.
 349  * 0-fill, but do not free "txq" descriptor structure.
 350  */
 351 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 352 {
 353         struct iwl3945_queue *q = &txq->q;
 354         struct pci_dev *dev = priv->pci_dev;
 355         int len;
 356
 357         if (q->n_bd == 0)
 358                 return;
 359
 360         /* first, empty all BD's */
 361         for (; q->write_ptr != q->read_ptr;
 362              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 363                 iwl3945_hw_txq_free_tfd(priv, txq);
 364
 365         len = sizeof(struct iwl3945_cmd) * q->n_window;
 366         if (q->id == IWL_CMD_QUEUE_NUM)
 367                 len += IWL_MAX_SCAN_SIZE;
 368
 369         /* De-alloc array of command/tx buffers */
 370         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 371
 372         /* De-alloc circular buffer of TFDs */
 373         if (txq->q.n_bd)
 374                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 375                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 376
 377         /* De-alloc array of per-TFD driver data */
 378         if (txq->txb) {
 379                 kfree(txq->txb);
 380                 txq->txb = NULL;
 381         }
 382
 383         /* 0-fill queue descriptor structure */
 384         memset(txq, 0, sizeof(*txq));
 385 }
 386
 387 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 388
 389 /*************** STATION TABLE MANAGEMENT ****
 390  * mac80211 should be examined to determine if sta_info is duplicating
 391  * the functionality provided here
 392  */
 393
 394 /**************************************************************/
 395 #if 0 /* temporary disable till we add real remove station */
 396 /**
 397  * iwl3945_remove_station - Remove driver's knowledge of station.
 398  *
 399  * NOTE:  This does not remove station from device's station table.
 400  */
 401 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 402 {
 403         int index = IWL_INVALID_STATION;
 404         int i;
 405         unsigned long flags;
 406
 407         spin_lock_irqsave(&priv->sta_lock, flags);
 408
 409         if (is_ap)
 410                 index = IWL_AP_ID;
 411         else if (is_broadcast_ether_addr(addr))
 412                 index = priv->hw_setting.bcast_sta_id;
 413         else
 414                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 415                         if (priv->stations[i].used &&
 416                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 417                                                 addr)) {
 418                                 index = i;
 419                                 break;
 420                         }
 421
 422         if (unlikely(index == IWL_INVALID_STATION))
 423                 goto out;
 424
 425         if (priv->stations[index].used) {
 426                 priv->stations[index].used = 0;
 427                 priv->num_stations--;
 428         }
 429
 430         BUG_ON(priv->num_stations < 0);
 431
 432 out:
 433         spin_unlock_irqrestore(&priv->sta_lock, flags);
 434         return 0;
 435 }
 436 #endif
 437
 438 /**
 439  * iwl3945_clear_stations_table - Clear the driver's station table
 440  *
 441  * NOTE:  This does not clear or otherwise alter the device's station table.
 442  */
 443 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 444 {
 445         unsigned long flags;
 446
 447         spin_lock_irqsave(&priv->sta_lock, flags);
 448
 449         priv->num_stations = 0;
 450         memset(priv->stations, 0, sizeof(priv->stations));
 451
 452         spin_unlock_irqrestore(&priv->sta_lock, flags);
 453 }
 454
 455 /**
 456  * iwl3945_add_station - Add station to station tables in driver and device
 457  */
 458 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 459 {
 460         int i;
 461         int index = IWL_INVALID_STATION;
 462         struct iwl3945_station_entry *station;
 463         unsigned long flags_spin;
 464         DECLARE_MAC_BUF(mac);
 465         u8 rate;
 466
 467         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 468         if (is_ap)
 469                 index = IWL_AP_ID;
 470         else if (is_broadcast_ether_addr(addr))
 471                 index = priv->hw_setting.bcast_sta_id;
 472         else
 473                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 474                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 475                                                 addr)) {
 476                                 index = i;
 477                                 break;
 478                         }
 479
 480                         if (!priv->stations[i].used &&
 481                             index == IWL_INVALID_STATION)
 482                                 index = i;
 483                 }
 484
 485         /* These two conditions has the same outcome but keep them separate
 486           since they have different meaning */
 487         if (unlikely(index == IWL_INVALID_STATION)) {
 488                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 489                 return index;
 490         }
 491
 492         if (priv->stations[index].used &&
 493            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 494                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 495                 return index;
 496         }
 497
 498         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 499         station = &priv->stations[index];
 500         station->used = 1;
 501         priv->num_stations++;
 502
 503         /* Set up the REPLY_ADD_STA command to send to device */
 504         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 505         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 506         station->sta.mode = 0;
 507         station->sta.sta.sta_id = index;
 508         station->sta.station_flags = 0;
 509
 510         if (priv->band == IEEE80211_BAND_5GHZ)
 511                 rate = IWL_RATE_6M_PLCP;
 512         else
 513                 rate =  IWL_RATE_1M_PLCP;
 514
 515         /* Turn on both antennas for the station... */
 516         station->sta.rate_n_flags =
 517                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 518         station->current_rate.rate_n_flags =
 519                         le16_to_cpu(station->sta.rate_n_flags);
 520
 521         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 522
 523         /* Add station to device's station table */
 524         iwl3945_send_add_station(priv, &station->sta, flags);
 525         return index;
 526
 527 }
 528
 529 /*************** DRIVER STATUS FUNCTIONS   *****/
 530
 531 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 532 {
 533         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 534          * set but EXIT_PENDING is not */
 535         return test_bit(STATUS_READY, &priv->status) &&
 536                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 537                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 538 }
 539
 540 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 541 {
 542         return test_bit(STATUS_ALIVE, &priv->status);
 543 }
 544
 545 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 546 {
 547         return test_bit(STATUS_INIT, &priv->status);
 548 }
 549
 550 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 551 {
 552         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 553                test_bit(STATUS_RF_KILL_SW, &priv->status);
 554 }
 555
 556 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 557 {
 558
 559         if (iwl3945_is_rfkill(priv))
 560                 return 0;
 561
 562         return iwl3945_is_ready(priv);
 563 }
 564
 565 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 566
 567 #define IWL_CMD(x) case x : return #x
 568
 569 static const char *get_cmd_string(u8 cmd)
 570 {
 571         switch (cmd) {
 572                 IWL_CMD(REPLY_ALIVE);
 573                 IWL_CMD(REPLY_ERROR);
 574                 IWL_CMD(REPLY_RXON);
 575                 IWL_CMD(REPLY_RXON_ASSOC);
 576                 IWL_CMD(REPLY_QOS_PARAM);
 577                 IWL_CMD(REPLY_RXON_TIMING);
 578                 IWL_CMD(REPLY_ADD_STA);
 579                 IWL_CMD(REPLY_REMOVE_STA);
 580                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 581                 IWL_CMD(REPLY_3945_RX);
 582                 IWL_CMD(REPLY_TX);
 583                 IWL_CMD(REPLY_RATE_SCALE);
 584                 IWL_CMD(REPLY_LEDS_CMD);
 585                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 586                 IWL_CMD(RADAR_NOTIFICATION);
 587                 IWL_CMD(REPLY_QUIET_CMD);
 588                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 589                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 590                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 591                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 592                 IWL_CMD(POWER_TABLE_CMD);
 593                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 594                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 595                 IWL_CMD(REPLY_SCAN_CMD);
 596                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 597                 IWL_CMD(SCAN_START_NOTIFICATION);
 598                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 599                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 600                 IWL_CMD(BEACON_NOTIFICATION);
 601                 IWL_CMD(REPLY_TX_BEACON);
 602                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 603                 IWL_CMD(QUIET_NOTIFICATION);
 604                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 605                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 606                 IWL_CMD(REPLY_BT_CONFIG);
 607                 IWL_CMD(REPLY_STATISTICS_CMD);
 608                 IWL_CMD(STATISTICS_NOTIFICATION);
 609                 IWL_CMD(REPLY_CARD_STATE_CMD);
 610                 IWL_CMD(CARD_STATE_NOTIFICATION);
 611                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 612         default:
 613                 return "UNKNOWN";
 614
 615         }
 616 }
 617
 618 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 619
 620 /**
 621  * iwl3945_enqueue_hcmd - enqueue a uCode command
 622  * @priv: device private data point
 623  * @cmd: a point to the ucode command structure
 624  *
 625  * The function returns < 0 values to indicate the operation is
 626  * failed. On success, it turns the index (> 0) of command in the
 627  * command queue.
 628  */
 629 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 630 {
 631         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 632         struct iwl3945_queue *q = &txq->q;
 633         struct iwl3945_tfd_frame *tfd;
 634         u32 *control_flags;
 635         struct iwl3945_cmd *out_cmd;
 636         u32 idx;
 637         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 638         dma_addr_t phys_addr;
 639         int pad;
 640         u16 count;
 641         int ret;
 642         unsigned long flags;
 643
 644         /* If any of the command structures end up being larger than
 645          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 646          * we will need to increase the size of the TFD entries */
 647         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 648                !(cmd->meta.flags & CMD_SIZE_HUGE));
 649
 650
 651         if (iwl3945_is_rfkill(priv)) {
 652                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 653                 return -EIO;
 654         }
 655
 656         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 657                 IWL_ERROR("No space for Tx\n");
 658                 return -ENOSPC;
 659         }
 660
 661         spin_lock_irqsave(&priv->hcmd_lock, flags);
 662
 663         tfd = &txq->bd[q->write_ptr];
 664         memset(tfd, 0, sizeof(*tfd));
 665
 666         control_flags = (u32 *) tfd;
 667
 668         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 669         out_cmd = &txq->cmd[idx];
 670
 671         out_cmd->hdr.cmd = cmd->id;
 672         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 673         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 674
 675         /* At this point, the out_cmd now has all of the incoming cmd
 676          * information */
 677
 678         out_cmd->hdr.flags = 0;
 679         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 680                         INDEX_TO_SEQ(q->write_ptr));
 681         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 682                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 683
 684         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 685                         offsetof(struct iwl3945_cmd, hdr);
 686         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 687
 688         pad = U32_PAD(cmd->len);
 689         count = TFD_CTL_COUNT_GET(*control_flags);
 690         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 691
 692         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 693                      "%d bytes at %d[%d]:%d\n",
 694                      get_cmd_string(out_cmd->hdr.cmd),
 695                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 696                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 697
 698         txq->need_update = 1;
 699
 700         /* Increment and update queue's write index */
 701         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 702         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 703
 704         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 705         return ret ? ret : idx;
 706 }
 707
 708 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 709 {
 710         int ret;
 711
 712         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 713
 714         /* An asynchronous command can not expect an SKB to be set. */
 715         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 716
 717         /* An asynchronous command MUST have a callback. */
 718         BUG_ON(!cmd->meta.u.callback);
 719
 720         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 721                 return -EBUSY;
 722
 723         ret = iwl3945_enqueue_hcmd(priv, cmd);
 724         if (ret < 0) {
 725                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 726                           get_cmd_string(cmd->id), ret);
 727                 return ret;
 728         }
 729         return 0;
 730 }
 731
 732 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 733 {
 734         int cmd_idx;
 735         int ret;
 736         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 737
 738         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 739
 740          /* A synchronous command can not have a callback set. */
 741         BUG_ON(cmd->meta.u.callback != NULL);
 742
 743         if (atomic_xchg(&entry, 1)) {
 744                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 745                           get_cmd_string(cmd->id));
 746                 return -EBUSY;
 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         atomic_set(&entry, 0);
 817         return ret;
 818 }
 819
 820 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 821 {
 822         if (cmd->meta.flags & CMD_ASYNC)
 823                 return iwl3945_send_cmd_async(priv, cmd);
 824
 825         return iwl3945_send_cmd_sync(priv, cmd);
 826 }
 827
 828 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 829 {
 830         struct iwl3945_host_cmd cmd = {
 831                 .id = id,
 832                 .len = len,
 833                 .data = data,
 834         };
 835
 836         return iwl3945_send_cmd_sync(priv, &cmd);
 837 }
 838
 839 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 840 {
 841         struct iwl3945_host_cmd cmd = {
 842                 .id = id,
 843                 .len = sizeof(val),
 844                 .data = &val,
 845         };
 846
 847         return iwl3945_send_cmd_sync(priv, &cmd);
 848 }
 849
 850 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 851 {
 852         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 853 }
 854
 855 /**
 856  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 857  * @band: 2.4 or 5 GHz band
 858  * @channel: Any channel valid for the requested band
 859
 860  * In addition to setting the staging RXON, priv->band is also set.
 861  *
 862  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 863  * in the staging RXON flag structure based on the band
 864  */
 865 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 866                                     enum ieee80211_band band,
 867                                     u16 channel)
 868 {
 869         if (!iwl3945_get_channel_info(priv, band, channel)) {
 870                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 871                                channel, band);
 872                 return -EINVAL;
 873         }
 874
 875         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 876             (priv->band == band))
 877                 return 0;
 878
 879         priv->staging_rxon.channel = cpu_to_le16(channel);
 880         if (band == IEEE80211_BAND_5GHZ)
 881                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 882         else
 883                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 884
 885         priv->band = band;
 886
 887         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 888
 889         return 0;
 890 }
 891
 892 /**
 893  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 894  *
 895  * NOTE:  This is really only useful during development and can eventually
 896  * be #ifdef'd out once the driver is stable and folks aren't actively
 897  * making changes
 898  */
 899 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 900 {
 901         int error = 0;
 902         int counter = 1;
 903
 904         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 905                 error |= le32_to_cpu(rxon->flags &
 906                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 907                                  RXON_FLG_RADAR_DETECT_MSK));
 908                 if (error)
 909                         IWL_WARNING("check 24G fields %d | %d\n",
 910                                     counter++, error);
 911         } else {
 912                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 913                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 914                 if (error)
 915                         IWL_WARNING("check 52 fields %d | %d\n",
 916                                     counter++, error);
 917                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 918                 if (error)
 919                         IWL_WARNING("check 52 CCK %d | %d\n",
 920                                     counter++, error);
 921         }
 922         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 923         if (error)
 924                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 925
 926         /* make sure basic rates 6Mbps and 1Mbps are supported */
 927         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 928                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 929         if (error)
 930                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 931
 932         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 933         if (error)
 934                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 935
 936         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 937                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 938         if (error)
 939                 IWL_WARNING("check CCK and short slot %d | %d\n",
 940                             counter++, error);
 941
 942         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 943                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 944         if (error)
 945                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 946                             counter++, error);
 947
 948         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 949                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 950         if (error)
 951                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 952                             counter++, error);
 953
 954         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 955                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 956                                 RXON_FLG_ANT_A_MSK)) == 0);
 957         if (error)
 958                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 959
 960         if (error)
 961                 IWL_WARNING("Tuning to channel %d\n",
 962                             le16_to_cpu(rxon->channel));
 963
 964         if (error) {
 965                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 966                 return -1;
 967         }
 968         return 0;
 969 }
 970
 971 /**
 972  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 973  * @priv: staging_rxon is compared to active_rxon
 974  *
 975  * If the RXON structure is changing enough to require a new tune,
 976  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 977  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 978  */
 979 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
 980 {
 981
 982         /* These items are only settable from the full RXON command */
 983         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 984             compare_ether_addr(priv->staging_rxon.bssid_addr,
 985                                priv->active_rxon.bssid_addr) ||
 986             compare_ether_addr(priv->staging_rxon.node_addr,
 987                                priv->active_rxon.node_addr) ||
 988             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 989                                priv->active_rxon.wlap_bssid_addr) ||
 990             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 991             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 992             (priv->staging_rxon.air_propagation !=
 993              priv->active_rxon.air_propagation) ||
 994             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 995                 return 1;
 996
 997         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 998          * be updated with the RXON_ASSOC command -- however only some
 999          * flag transitions are allowed using RXON_ASSOC */
1000
1001         /* Check if we are not switching bands */
1002         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1003             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1004                 return 1;
1005
1006         /* Check if we are switching association toggle */
1007         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1008                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1009                 return 1;
1010
1011         return 0;
1012 }
1013
1014 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1015 {
1016         int rc = 0;
1017         struct iwl3945_rx_packet *res = NULL;
1018         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1019         struct iwl3945_host_cmd cmd = {
1020                 .id = REPLY_RXON_ASSOC,
1021                 .len = sizeof(rxon_assoc),
1022                 .meta.flags = CMD_WANT_SKB,
1023                 .data = &rxon_assoc,
1024         };
1025         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1026         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1027
1028         if ((rxon1->flags == rxon2->flags) &&
1029             (rxon1->filter_flags == rxon2->filter_flags) &&
1030             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1031             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1032                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1033                 return 0;
1034         }
1035
1036         rxon_assoc.flags = priv->staging_rxon.flags;
1037         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1038         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1039         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1040         rxon_assoc.reserved = 0;
1041
1042         rc = iwl3945_send_cmd_sync(priv, &cmd);
1043         if (rc)
1044                 return rc;
1045
1046         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1047         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1048                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1049                 rc = -EIO;
1050         }
1051
1052         priv->alloc_rxb_skb--;
1053         dev_kfree_skb_any(cmd.meta.u.skb);
1054
1055         return rc;
1056 }
1057
1058 /**
1059  * iwl3945_commit_rxon - commit staging_rxon to hardware
1060  *
1061  * The RXON command in staging_rxon is committed to the hardware and
1062  * the active_rxon structure is updated with the new data.  This
1063  * function correctly transitions out of the RXON_ASSOC_MSK state if
1064  * a HW tune is required based on the RXON structure changes.
1065  */
1066 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1067 {
1068         /* cast away the const for active_rxon in this function */
1069         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1070         int rc = 0;
1071         DECLARE_MAC_BUF(mac);
1072
1073         if (!iwl3945_is_alive(priv))
1074                 return -1;
1075
1076         /* always get timestamp with Rx frame */
1077         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1078
1079         /* select antenna */
1080         priv->staging_rxon.flags &=
1081             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1082         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1083
1084         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1085         if (rc) {
1086                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1087                 return -EINVAL;
1088         }
1089
1090         /* If we don't need to send a full RXON, we can use
1091          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1092          * and other flags for the current radio configuration. */
1093         if (!iwl3945_full_rxon_required(priv)) {
1094                 rc = iwl3945_send_rxon_assoc(priv);
1095                 if (rc) {
1096                         IWL_ERROR("Error setting RXON_ASSOC "
1097                                   "configuration (%d).\n", rc);
1098                         return rc;
1099                 }
1100
1101                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1102
1103                 return 0;
1104         }
1105
1106         /* If we are currently associated and the new config requires
1107          * an RXON_ASSOC and the new config wants the associated mask enabled,
1108          * we must clear the associated from the active configuration
1109          * before we apply the new config */
1110         if (iwl3945_is_associated(priv) &&
1111             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1112                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1113                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1114
1115                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1116                                       sizeof(struct iwl3945_rxon_cmd),
1117                                       &priv->active_rxon);
1118
1119                 /* If the mask clearing failed then we set
1120                  * active_rxon back to what it was previously */
1121                 if (rc) {
1122                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1123                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1124                                   "configuration (%d).\n", rc);
1125                         return rc;
1126                 }
1127         }
1128
1129         IWL_DEBUG_INFO("Sending RXON\n"
1130                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1131                        "* channel = %d\n"
1132                        "* bssid = %s\n",
1133                        ((priv->staging_rxon.filter_flags &
1134                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1135                        le16_to_cpu(priv->staging_rxon.channel),
1136                        print_mac(mac, priv->staging_rxon.bssid_addr));
1137
1138         /* Apply the new configuration */
1139         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1140                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1141         if (rc) {
1142                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1143                 return rc;
1144         }
1145
1146         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1147
1148         iwl3945_clear_stations_table(priv);
1149
1150         /* If we issue a new RXON command which required a tune then we must
1151          * send a new TXPOWER command or we won't be able to Tx any frames */
1152         rc = iwl3945_hw_reg_send_txpower(priv);
1153         if (rc) {
1154                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1155                 return rc;
1156         }
1157
1158         /* Add the broadcast address so we can send broadcast frames */
1159         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1160             IWL_INVALID_STATION) {
1161                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1162                 return -EIO;
1163         }
1164
1165         /* If we have set the ASSOC_MSK and we are in BSS mode then
1166          * add the IWL_AP_ID to the station rate table */
1167         if (iwl3945_is_associated(priv) &&
1168             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1169                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1170                     == IWL_INVALID_STATION) {
1171                         IWL_ERROR("Error adding AP address for transmit.\n");
1172                         return -EIO;
1173                 }
1174
1175         /* Init the hardware's rate fallback order based on the band */
1176         rc = iwl3945_init_hw_rate_table(priv);
1177         if (rc) {
1178                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1179                 return -EIO;
1180         }
1181
1182         return 0;
1183 }
1184
1185 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1186 {
1187         struct iwl3945_bt_cmd bt_cmd = {
1188                 .flags = 3,
1189                 .lead_time = 0xAA,
1190                 .max_kill = 1,
1191                 .kill_ack_mask = 0,
1192                 .kill_cts_mask = 0,
1193         };
1194
1195         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1196                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1197 }
1198
1199 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1200 {
1201         int rc = 0;
1202         struct iwl3945_rx_packet *res;
1203         struct iwl3945_host_cmd cmd = {
1204                 .id = REPLY_SCAN_ABORT_CMD,
1205                 .meta.flags = CMD_WANT_SKB,
1206         };
1207
1208         /* If there isn't a scan actively going on in the hardware
1209          * then we are in between scan bands and not actually
1210          * actively scanning, so don't send the abort command */
1211         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1212                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1213                 return 0;
1214         }
1215
1216         rc = iwl3945_send_cmd_sync(priv, &cmd);
1217         if (rc) {
1218                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1219                 return rc;
1220         }
1221
1222         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1223         if (res->u.status != CAN_ABORT_STATUS) {
1224                 /* The scan abort will return 1 for success or
1225                  * 2 for "failure".  A failure condition can be
1226                  * due to simply not being in an active scan which
1227                  * can occur if we send the scan abort before we
1228                  * the microcode has notified us that a scan is
1229                  * completed. */
1230                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1231                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1232                 clear_bit(STATUS_SCAN_HW, &priv->status);
1233         }
1234
1235         dev_kfree_skb_any(cmd.meta.u.skb);
1236
1237         return rc;
1238 }
1239
1240 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1241                                         struct iwl3945_cmd *cmd,
1242                                         struct sk_buff *skb)
1243 {
1244         return 1;
1245 }
1246
1247 /*
1248  * CARD_STATE_CMD
1249  *
1250  * Use: Sets the device's internal card state to enable, disable, or halt
1251  *
1252  * When in the 'enable' state the card operates as normal.
1253  * When in the 'disable' state, the card enters into a low power mode.
1254  * When in the 'halt' state, the card is shut down and must be fully
1255  * restarted to come back on.
1256  */
1257 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1258 {
1259         struct iwl3945_host_cmd cmd = {
1260                 .id = REPLY_CARD_STATE_CMD,
1261                 .len = sizeof(u32),
1262                 .data = &flags,
1263                 .meta.flags = meta_flag,
1264         };
1265
1266         if (meta_flag & CMD_ASYNC)
1267                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1268
1269         return iwl3945_send_cmd(priv, &cmd);
1270 }
1271
1272 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1273                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1274 {
1275         struct iwl3945_rx_packet *res = NULL;
1276
1277         if (!skb) {
1278                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1279                 return 1;
1280         }
1281
1282         res = (struct iwl3945_rx_packet *)skb->data;
1283         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1284                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1285                           res->hdr.flags);
1286                 return 1;
1287         }
1288
1289         switch (res->u.add_sta.status) {
1290         case ADD_STA_SUCCESS_MSK:
1291                 break;
1292         default:
1293                 break;
1294         }
1295
1296         /* We didn't cache the SKB; let the caller free it */
1297         return 1;
1298 }
1299
1300 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1301                          struct iwl3945_addsta_cmd *sta, u8 flags)
1302 {
1303         struct iwl3945_rx_packet *res = NULL;
1304         int rc = 0;
1305         struct iwl3945_host_cmd cmd = {
1306                 .id = REPLY_ADD_STA,
1307                 .len = sizeof(struct iwl3945_addsta_cmd),
1308                 .meta.flags = flags,
1309                 .data = sta,
1310         };
1311
1312         if (flags & CMD_ASYNC)
1313                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1314         else
1315                 cmd.meta.flags |= CMD_WANT_SKB;
1316
1317         rc = iwl3945_send_cmd(priv, &cmd);
1318
1319         if (rc || (flags & CMD_ASYNC))
1320                 return rc;
1321
1322         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1323         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1324                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1325                           res->hdr.flags);
1326                 rc = -EIO;
1327         }
1328
1329         if (rc == 0) {
1330                 switch (res->u.add_sta.status) {
1331                 case ADD_STA_SUCCESS_MSK:
1332                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1333                         break;
1334                 default:
1335                         rc = -EIO;
1336                         IWL_WARNING("REPLY_ADD_STA failed\n");
1337                         break;
1338                 }
1339         }
1340
1341         priv->alloc_rxb_skb--;
1342         dev_kfree_skb_any(cmd.meta.u.skb);
1343
1344         return rc;
1345 }
1346
1347 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1348                                    struct ieee80211_key_conf *keyconf,
1349                                    u8 sta_id)
1350 {
1351         unsigned long flags;
1352         __le16 key_flags = 0;
1353
1354         switch (keyconf->alg) {
1355         case ALG_CCMP:
1356                 key_flags |= STA_KEY_FLG_CCMP;
1357                 key_flags |= cpu_to_le16(
1358                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1359                 key_flags &= ~STA_KEY_FLG_INVALID;
1360                 break;
1361         case ALG_TKIP:
1362         case ALG_WEP:
1363         default:
1364                 return -EINVAL;
1365         }
1366         spin_lock_irqsave(&priv->sta_lock, flags);
1367         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1368         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1369         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1370                keyconf->keylen);
1371
1372         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1373                keyconf->keylen);
1374         priv->stations[sta_id].sta.key.key_flags = key_flags;
1375         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1376         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1377
1378         spin_unlock_irqrestore(&priv->sta_lock, flags);
1379
1380         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1381         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1382         return 0;
1383 }
1384
1385 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1386 {
1387         unsigned long flags;
1388
1389         spin_lock_irqsave(&priv->sta_lock, flags);
1390         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1391         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1392         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1393         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1394         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1395         spin_unlock_irqrestore(&priv->sta_lock, flags);
1396
1397         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1398         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1399         return 0;
1400 }
1401
1402 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1403 {
1404         struct list_head *element;
1405
1406         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1407                        priv->frames_count);
1408
1409         while (!list_empty(&priv->free_frames)) {
1410                 element = priv->free_frames.next;
1411                 list_del(element);
1412                 kfree(list_entry(element, struct iwl3945_frame, list));
1413                 priv->frames_count--;
1414         }
1415
1416         if (priv->frames_count) {
1417                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1418                             priv->frames_count);
1419                 priv->frames_count = 0;
1420         }
1421 }
1422
1423 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1424 {
1425         struct iwl3945_frame *frame;
1426         struct list_head *element;
1427         if (list_empty(&priv->free_frames)) {
1428                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1429                 if (!frame) {
1430                         IWL_ERROR("Could not allocate frame!\n");
1431                         return NULL;
1432                 }
1433
1434                 priv->frames_count++;
1435                 return frame;
1436         }
1437
1438         element = priv->free_frames.next;
1439         list_del(element);
1440         return list_entry(element, struct iwl3945_frame, list);
1441 }
1442
1443 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1444 {
1445         memset(frame, 0, sizeof(*frame));
1446         list_add(&frame->list, &priv->free_frames);
1447 }
1448
1449 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1450                                 struct ieee80211_hdr *hdr,
1451                                 const u8 *dest, int left)
1452 {
1453
1454         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1455             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1456              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1457                 return 0;
1458
1459         if (priv->ibss_beacon->len > left)
1460                 return 0;
1461
1462         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1463
1464         return priv->ibss_beacon->len;
1465 }
1466
1467 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1468 {
1469         u8 i;
1470
1471         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1472              i = iwl3945_rates[i].next_ieee) {
1473                 if (rate_mask & (1 << i))
1474                         return iwl3945_rates[i].plcp;
1475         }
1476
1477         return IWL_RATE_INVALID;
1478 }
1479
1480 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1481 {
1482         struct iwl3945_frame *frame;
1483         unsigned int frame_size;
1484         int rc;
1485         u8 rate;
1486
1487         frame = iwl3945_get_free_frame(priv);
1488
1489         if (!frame) {
1490                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1491                           "command.\n");
1492                 return -ENOMEM;
1493         }
1494
1495         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1496                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1497                                                 0xFF0);
1498                 if (rate == IWL_INVALID_RATE)
1499                         rate = IWL_RATE_6M_PLCP;
1500         } else {
1501                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1502                 if (rate == IWL_INVALID_RATE)
1503                         rate = IWL_RATE_1M_PLCP;
1504         }
1505
1506         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1507
1508         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1509                               &frame->u.cmd[0]);
1510
1511         iwl3945_free_frame(priv, frame);
1512
1513         return rc;
1514 }
1515
1516 /******************************************************************************
1517  *
1518  * EEPROM related functions
1519  *
1520  ******************************************************************************/
1521
1522 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1523 {
1524         memcpy(mac, priv->eeprom.mac_address, 6);
1525 }
1526
1527 /*
1528  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1529  * embedded controller) as EEPROM reader; each read is a series of pulses
1530  * to/from the EEPROM chip, not a single event, so even reads could conflict
1531  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1532  * simply claims ownership, which should be safe when this function is called
1533  * (i.e. before loading uCode!).
1534  */
1535 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1536 {
1537         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1538         return 0;
1539 }
1540
1541 /**
1542  * iwl3945_eeprom_init - read EEPROM contents
1543  *
1544  * Load the EEPROM contents from adapter into priv->eeprom
1545  *
1546  * NOTE:  This routine uses the non-debug IO access functions.
1547  */
1548 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1549 {
1550         u16 *e = (u16 *)&priv->eeprom;
1551         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1552         u32 r;
1553         int sz = sizeof(priv->eeprom);
1554         int rc;
1555         int i;
1556         u16 addr;
1557
1558         /* The EEPROM structure has several padding buffers within it
1559          * and when adding new EEPROM maps is subject to programmer errors
1560          * which may be very difficult to identify without explicitly
1561          * checking the resulting size of the eeprom map. */
1562         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1563
1564         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1565                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1566                 return -ENOENT;
1567         }
1568
1569         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1570         rc = iwl3945_eeprom_acquire_semaphore(priv);
1571         if (rc < 0) {
1572                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1573                 return -ENOENT;
1574         }
1575
1576         /* eeprom is an array of 16bit values */
1577         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1578                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1579                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1580
1581                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1582                                         i += IWL_EEPROM_ACCESS_DELAY) {
1583                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1584                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1585                                 break;
1586                         udelay(IWL_EEPROM_ACCESS_DELAY);
1587                 }
1588
1589                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1590                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1591                         return -ETIMEDOUT;
1592                 }
1593                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1594         }
1595
1596         return 0;
1597 }
1598
1599 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1600 {
1601         if (priv->hw_setting.shared_virt)
1602                 pci_free_consistent(priv->pci_dev,
1603                                     sizeof(struct iwl3945_shared),
1604                                     priv->hw_setting.shared_virt,
1605                                     priv->hw_setting.shared_phys);
1606 }
1607
1608 /**
1609  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1610  *
1611  * return : set the bit for each supported rate insert in ie
1612  */
1613 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1614                                     u16 basic_rate, int *left)
1615 {
1616         u16 ret_rates = 0, bit;
1617         int i;
1618         u8 *cnt = ie;
1619         u8 *rates = ie + 1;
1620
1621         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1622                 if (bit & supported_rate) {
1623                         ret_rates |= bit;
1624                         rates[*cnt] = iwl3945_rates[i].ieee |
1625                                 ((bit & basic_rate) ? 0x80 : 0x00);
1626                         (*cnt)++;
1627                         (*left)--;
1628                         if ((*left <= 0) ||
1629                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1630                                 break;
1631                 }
1632         }
1633
1634         return ret_rates;
1635 }
1636
1637 /**
1638  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1639  */
1640 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1641                               struct ieee80211_mgmt *frame,
1642                               int left, int is_direct)
1643 {
1644         int len = 0;
1645         u8 *pos = NULL;
1646         u16 active_rates, ret_rates, cck_rates;
1647
1648         /* Make sure there is enough space for the probe request,
1649          * two mandatory IEs and the data */
1650         left -= 24;
1651         if (left < 0)
1652                 return 0;
1653         len += 24;
1654
1655         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1656         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1657         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1658         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1659         frame->seq_ctrl = 0;
1660
1661         /* fill in our indirect SSID IE */
1662         /* ...next IE... */
1663
1664         left -= 2;
1665         if (left < 0)
1666                 return 0;
1667         len += 2;
1668         pos = &(frame->u.probe_req.variable[0]);
1669         *pos++ = WLAN_EID_SSID;
1670         *pos++ = 0;
1671
1672         /* fill in our direct SSID IE... */
1673         if (is_direct) {
1674                 /* ...next IE... */
1675                 left -= 2 + priv->essid_len;
1676                 if (left < 0)
1677                         return 0;
1678                 /* ... fill it in... */
1679                 *pos++ = WLAN_EID_SSID;
1680                 *pos++ = priv->essid_len;
1681                 memcpy(pos, priv->essid, priv->essid_len);
1682                 pos += priv->essid_len;
1683                 len += 2 + priv->essid_len;
1684         }
1685
1686         /* fill in supported rate */
1687         /* ...next IE... */
1688         left -= 2;
1689         if (left < 0)
1690                 return 0;
1691
1692         /* ... fill it in... */
1693         *pos++ = WLAN_EID_SUPP_RATES;
1694         *pos = 0;
1695
1696         priv->active_rate = priv->rates_mask;
1697         active_rates = priv->active_rate;
1698         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1699
1700         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1701         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1702                         priv->active_rate_basic, &left);
1703         active_rates &= ~ret_rates;
1704
1705         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1706                                  priv->active_rate_basic, &left);
1707         active_rates &= ~ret_rates;
1708
1709         len += 2 + *pos;
1710         pos += (*pos) + 1;
1711         if (active_rates == 0)
1712                 goto fill_end;
1713
1714         /* fill in supported extended rate */
1715         /* ...next IE... */
1716         left -= 2;
1717         if (left < 0)
1718                 return 0;
1719         /* ... fill it in... */
1720         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1721         *pos = 0;
1722         iwl3945_supported_rate_to_ie(pos, active_rates,
1723                                  priv->active_rate_basic, &left);
1724         if (*pos > 0)
1725                 len += 2 + *pos;
1726
1727  fill_end:
1728         return (u16)len;
1729 }
1730
1731 /*
1732  * QoS  support
1733 */
1734 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1735                                        struct iwl3945_qosparam_cmd *qos)
1736 {
1737
1738         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1739                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1740 }
1741
1742 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1743 {
1744         u16 cw_min = 15;
1745         u16 cw_max = 1023;
1746         u8 aifs = 2;
1747         u8 is_legacy = 0;
1748         unsigned long flags;
1749         int i;
1750
1751         spin_lock_irqsave(&priv->lock, flags);
1752         priv->qos_data.qos_active = 0;
1753
1754         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1755                 if (priv->qos_data.qos_enable)
1756                         priv->qos_data.qos_active = 1;
1757                 if (!(priv->active_rate & 0xfff0)) {
1758                         cw_min = 31;
1759                         is_legacy = 1;
1760                 }
1761         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1762                 if (priv->qos_data.qos_enable)
1763                         priv->qos_data.qos_active = 1;
1764         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1765                 cw_min = 31;
1766                 is_legacy = 1;
1767         }
1768
1769         if (priv->qos_data.qos_active)
1770                 aifs = 3;
1771
1772         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1773         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1774         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1775         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1776         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1777
1778         if (priv->qos_data.qos_active) {
1779                 i = 1;
1780                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1781                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1782                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1783                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1784                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1785
1786                 i = 2;
1787                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1788                         cpu_to_le16((cw_min + 1) / 2 - 1);
1789                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1790                         cpu_to_le16(cw_max);
1791                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1792                 if (is_legacy)
1793                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1794                                 cpu_to_le16(6016);
1795                 else
1796                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1797                                 cpu_to_le16(3008);
1798                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1799
1800                 i = 3;
1801                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1802                         cpu_to_le16((cw_min + 1) / 4 - 1);
1803                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1804                         cpu_to_le16((cw_max + 1) / 2 - 1);
1805                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1806                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1807                 if (is_legacy)
1808                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1809                                 cpu_to_le16(3264);
1810                 else
1811                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1812                                 cpu_to_le16(1504);
1813         } else {
1814                 for (i = 1; i < 4; i++) {
1815                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1816                                 cpu_to_le16(cw_min);
1817                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1818                                 cpu_to_le16(cw_max);
1819                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1820                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1821                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1822                 }
1823         }
1824         IWL_DEBUG_QOS("set QoS to default \n");
1825
1826         spin_unlock_irqrestore(&priv->lock, flags);
1827 }
1828
1829 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
1830 {
1831         unsigned long flags;
1832
1833         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1834                 return;
1835
1836         if (!priv->qos_data.qos_enable)
1837                 return;
1838
1839         spin_lock_irqsave(&priv->lock, flags);
1840         priv->qos_data.def_qos_parm.qos_flags = 0;
1841
1842         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1843             !priv->qos_data.qos_cap.q_AP.txop_request)
1844                 priv->qos_data.def_qos_parm.qos_flags |=
1845                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1846
1847         if (priv->qos_data.qos_active)
1848                 priv->qos_data.def_qos_parm.qos_flags |=
1849                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1850
1851         spin_unlock_irqrestore(&priv->lock, flags);
1852
1853         if (force || iwl3945_is_associated(priv)) {
1854                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1855                               priv->qos_data.qos_active);
1856
1857                 iwl3945_send_qos_params_command(priv,
1858                                 &(priv->qos_data.def_qos_parm));
1859         }
1860 }
1861
1862 /*
1863  * Power management (not Tx power!) functions
1864  */
1865 #define MSEC_TO_USEC 1024
1866
1867 #define NOSLP __constant_cpu_to_le32(0)
1868 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
1869 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1870 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1871                                      __constant_cpu_to_le32(X1), \
1872                                      __constant_cpu_to_le32(X2), \
1873                                      __constant_cpu_to_le32(X3), \
1874                                      __constant_cpu_to_le32(X4)}
1875
1876
1877 /* default power management (not Tx power) table values */
1878 /* for tim  0-10 */
1879 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
1880         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1881         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1882         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1883         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1884         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1885         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1886 };
1887
1888 /* for tim > 10 */
1889 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
1890         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1891         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1892                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1893         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1894                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1895         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1896                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1897         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1898         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1899                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1900 };
1901
1902 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
1903 {
1904         int rc = 0, i;
1905         struct iwl3945_power_mgr *pow_data;
1906         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
1907         u16 pci_pm;
1908
1909         IWL_DEBUG_POWER("Initialize power \n");
1910
1911         pow_data = &(priv->power_data);
1912
1913         memset(pow_data, 0, sizeof(*pow_data));
1914
1915         pow_data->active_index = IWL_POWER_RANGE_0;
1916         pow_data->dtim_val = 0xffff;
1917
1918         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1919         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1920
1921         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1922         if (rc != 0)
1923                 return 0;
1924         else {
1925                 struct iwl3945_powertable_cmd *cmd;
1926
1927                 IWL_DEBUG_POWER("adjust power command flags\n");
1928
1929                 for (i = 0; i < IWL_POWER_AC; i++) {
1930                         cmd = &pow_data->pwr_range_0[i].cmd;
1931
1932                         if (pci_pm & 0x1)
1933                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1934                         else
1935                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1936                 }
1937         }
1938         return rc;
1939 }
1940
1941 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
1942                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
1943 {
1944         int rc = 0, i;
1945         u8 skip;
1946         u32 max_sleep = 0;
1947         struct iwl3945_power_vec_entry *range;
1948         u8 period = 0;
1949         struct iwl3945_power_mgr *pow_data;
1950
1951         if (mode > IWL_POWER_INDEX_5) {
1952                 IWL_DEBUG_POWER("Error invalid power mode \n");
1953                 return -1;
1954         }
1955         pow_data = &(priv->power_data);
1956
1957         if (pow_data->active_index == IWL_POWER_RANGE_0)
1958                 range = &pow_data->pwr_range_0[0];
1959         else
1960                 range = &pow_data->pwr_range_1[1];
1961
1962         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1963
1964 #ifdef IWL_MAC80211_DISABLE
1965         if (priv->assoc_network != NULL) {
1966                 unsigned long flags;
1967
1968                 period = priv->assoc_network->tim.tim_period;
1969         }
1970 #endif  /*IWL_MAC80211_DISABLE */
1971         skip = range[mode].no_dtim;
1972
1973         if (period == 0) {
1974                 period = 1;
1975                 skip = 0;
1976         }
1977
1978         if (skip == 0) {
1979                 max_sleep = period;
1980                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1981         } else {
1982                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1983                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1984                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1985         }
1986
1987         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1988                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1989                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1990         }
1991
1992         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1993         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1994         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1995         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1996                         le32_to_cpu(cmd->sleep_interval[0]),
1997                         le32_to_cpu(cmd->sleep_interval[1]),
1998                         le32_to_cpu(cmd->sleep_interval[2]),
1999                         le32_to_cpu(cmd->sleep_interval[3]),
2000                         le32_to_cpu(cmd->sleep_interval[4]));
2001
2002         return rc;
2003 }
2004
2005 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2006 {
2007         u32 uninitialized_var(final_mode);
2008         int rc;
2009         struct iwl3945_powertable_cmd cmd;
2010
2011         /* If on battery, set to 3,
2012          * if plugged into AC power, set to CAM ("continuously aware mode"),
2013          * else user level */
2014         switch (mode) {
2015         case IWL_POWER_BATTERY:
2016                 final_mode = IWL_POWER_INDEX_3;
2017                 break;
2018         case IWL_POWER_AC:
2019                 final_mode = IWL_POWER_MODE_CAM;
2020                 break;
2021         default:
2022                 final_mode = mode;
2023                 break;
2024         }
2025
2026         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2027
2028         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2029
2030         if (final_mode == IWL_POWER_MODE_CAM)
2031                 clear_bit(STATUS_POWER_PMI, &priv->status);
2032         else
2033                 set_bit(STATUS_POWER_PMI, &priv->status);
2034
2035         return rc;
2036 }
2037
2038 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2039 {
2040         /* Filter incoming packets to determine if they are targeted toward
2041          * this network, discarding packets coming from ourselves */
2042         switch (priv->iw_mode) {
2043         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2044                 /* packets from our adapter are dropped (echo) */
2045                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2046                         return 0;
2047                 /* {broad,multi}cast packets to our IBSS go through */
2048                 if (is_multicast_ether_addr(header->addr1))
2049                         return !compare_ether_addr(header->addr3, priv->bssid);
2050                 /* packets to our adapter go through */
2051                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2052         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2053                 /* packets from our adapter are dropped (echo) */
2054                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2055                         return 0;
2056                 /* {broad,multi}cast packets to our BSS go through */
2057                 if (is_multicast_ether_addr(header->addr1))
2058                         return !compare_ether_addr(header->addr2, priv->bssid);
2059                 /* packets to our adapter go through */
2060                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2061         }
2062
2063         return 1;
2064 }
2065
2066 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2067
2068 static const char *iwl3945_get_tx_fail_reason(u32 status)
2069 {
2070         switch (status & TX_STATUS_MSK) {
2071         case TX_STATUS_SUCCESS:
2072                 return "SUCCESS";
2073                 TX_STATUS_ENTRY(SHORT_LIMIT);
2074                 TX_STATUS_ENTRY(LONG_LIMIT);
2075                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2076                 TX_STATUS_ENTRY(MGMNT_ABORT);
2077                 TX_STATUS_ENTRY(NEXT_FRAG);
2078                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2079                 TX_STATUS_ENTRY(DEST_PS);
2080                 TX_STATUS_ENTRY(ABORTED);
2081                 TX_STATUS_ENTRY(BT_RETRY);
2082                 TX_STATUS_ENTRY(STA_INVALID);
2083                 TX_STATUS_ENTRY(FRAG_DROPPED);
2084                 TX_STATUS_ENTRY(TID_DISABLE);
2085                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2086                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2087                 TX_STATUS_ENTRY(TX_LOCKED);
2088                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2089         }
2090
2091         return "UNKNOWN";
2092 }
2093
2094 /**
2095  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2096  *
2097  * NOTE: priv->mutex is not required before calling this function
2098  */
2099 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2100 {
2101         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2102                 clear_bit(STATUS_SCANNING, &priv->status);
2103                 return 0;
2104         }
2105
2106         if (test_bit(STATUS_SCANNING, &priv->status)) {
2107                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2108                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2109                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2110                         queue_work(priv->workqueue, &priv->abort_scan);
2111
2112                 } else
2113                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2114
2115                 return test_bit(STATUS_SCANNING, &priv->status);
2116         }
2117
2118         return 0;
2119 }
2120
2121 /**
2122  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2123  * @ms: amount of time to wait (in milliseconds) for scan to abort
2124  *
2125  * NOTE: priv->mutex must be held before calling this function
2126  */
2127 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2128 {
2129         unsigned long now = jiffies;
2130         int ret;
2131
2132         ret = iwl3945_scan_cancel(priv);
2133         if (ret && ms) {
2134                 mutex_unlock(&priv->mutex);
2135                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2136                                 test_bit(STATUS_SCANNING, &priv->status))
2137                         msleep(1);
2138                 mutex_lock(&priv->mutex);
2139
2140                 return test_bit(STATUS_SCANNING, &priv->status);
2141         }
2142
2143         return ret;
2144 }
2145
2146 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2147 {
2148         /* Reset ieee stats */
2149
2150         /* We don't reset the net_device_stats (ieee->stats) on
2151          * re-association */
2152
2153         priv->last_seq_num = -1;
2154         priv->last_frag_num = -1;
2155         priv->last_packet_time = 0;
2156
2157         iwl3945_scan_cancel(priv);
2158 }
2159
2160 #define MAX_UCODE_BEACON_INTERVAL       1024
2161 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2162
2163 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2164 {
2165         u16 new_val = 0;
2166         u16 beacon_factor = 0;
2167
2168         beacon_factor =
2169             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2170                 / MAX_UCODE_BEACON_INTERVAL;
2171         new_val = beacon_val / beacon_factor;
2172
2173         return cpu_to_le16(new_val);
2174 }
2175
2176 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2177 {
2178         u64 interval_tm_unit;
2179         u64 tsf, result;
2180         unsigned long flags;
2181         struct ieee80211_conf *conf = NULL;
2182         u16 beacon_int = 0;
2183
2184         conf = ieee80211_get_hw_conf(priv->hw);
2185
2186         spin_lock_irqsave(&priv->lock, flags);
2187         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2188         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2189
2190         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2191
2192         tsf = priv->timestamp1;
2193         tsf = ((tsf << 32) | priv->timestamp0);
2194
2195         beacon_int = priv->beacon_int;
2196         spin_unlock_irqrestore(&priv->lock, flags);
2197
2198         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2199                 if (beacon_int == 0) {
2200                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2201                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2202                 } else {
2203                         priv->rxon_timing.beacon_interval =
2204                                 cpu_to_le16(beacon_int);
2205                         priv->rxon_timing.beacon_interval =
2206                             iwl3945_adjust_beacon_interval(
2207                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2208                 }
2209
2210                 priv->rxon_timing.atim_window = 0;
2211         } else {
2212                 priv->rxon_timing.beacon_interval =
2213                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2214                 /* TODO: we need to get atim_window from upper stack
2215                  * for now we set to 0 */
2216                 priv->rxon_timing.atim_window = 0;
2217         }
2218
2219         interval_tm_unit =
2220                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2221         result = do_div(tsf, interval_tm_unit);
2222         priv->rxon_timing.beacon_init_val =
2223             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2224
2225         IWL_DEBUG_ASSOC
2226             ("beacon interval %d beacon timer %d beacon tim %d\n",
2227                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2228                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2229                 le16_to_cpu(priv->rxon_timing.atim_window));
2230 }
2231
2232 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2233 {
2234         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2235                 IWL_ERROR("APs don't scan.\n");
2236                 return 0;
2237         }
2238
2239         if (!iwl3945_is_ready_rf(priv)) {
2240                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2241                 return -EIO;
2242         }
2243
2244         if (test_bit(STATUS_SCANNING, &priv->status)) {
2245                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2246                 return -EAGAIN;
2247         }
2248
2249         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2250                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2251                                "Queuing.\n");
2252                 return -EAGAIN;
2253         }
2254
2255         IWL_DEBUG_INFO("Starting scan...\n");
2256         priv->scan_bands = 2;
2257         set_bit(STATUS_SCANNING, &priv->status);
2258         priv->scan_start = jiffies;
2259         priv->scan_pass_start = priv->scan_start;
2260
2261         queue_work(priv->workqueue, &priv->request_scan);
2262
2263         return 0;
2264 }
2265
2266 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2267 {
2268         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2269
2270         if (hw_decrypt)
2271                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2272         else
2273                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2274
2275         return 0;
2276 }
2277
2278 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2279                                           enum ieee80211_band band)
2280 {
2281         if (band == IEEE80211_BAND_5GHZ) {
2282                 priv->staging_rxon.flags &=
2283                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2284                       | RXON_FLG_CCK_MSK);
2285                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2286         } else {
2287                 /* Copied from iwl3945_bg_post_associate() */
2288                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2289                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2290                 else
2291                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2292
2293                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2294                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2295
2296                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2297                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2298                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2299         }
2300 }
2301
2302 /*
2303  * initialize rxon structure with default values from eeprom
2304  */
2305 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2306 {
2307         const struct iwl3945_channel_info *ch_info;
2308
2309         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2310
2311         switch (priv->iw_mode) {
2312         case IEEE80211_IF_TYPE_AP:
2313                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2314                 break;
2315
2316         case IEEE80211_IF_TYPE_STA:
2317                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2318                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2319                 break;
2320
2321         case IEEE80211_IF_TYPE_IBSS:
2322                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2323                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2324                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2325                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2326                 break;
2327
2328         case IEEE80211_IF_TYPE_MNTR:
2329                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2330                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2331                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2332                 break;
2333         }
2334
2335 #if 0
2336         /* TODO:  Figure out when short_preamble would be set and cache from
2337          * that */
2338         if (!hw_to_local(priv->hw)->short_preamble)
2339                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2340         else
2341                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2342 #endif
2343
2344         ch_info = iwl3945_get_channel_info(priv, priv->band,
2345                                        le16_to_cpu(priv->staging_rxon.channel));
2346
2347         if (!ch_info)
2348                 ch_info = &priv->channel_info[0];
2349
2350         /*
2351          * in some case A channels are all non IBSS
2352          * in this case force B/G channel
2353          */
2354         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2355             !(is_channel_ibss(ch_info)))
2356                 ch_info = &priv->channel_info[0];
2357
2358         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2359         if (is_channel_a_band(ch_info))
2360                 priv->band = IEEE80211_BAND_5GHZ;
2361         else
2362                 priv->band = IEEE80211_BAND_2GHZ;
2363
2364         iwl3945_set_flags_for_phymode(priv, priv->band);
2365
2366         priv->staging_rxon.ofdm_basic_rates =
2367             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2368         priv->staging_rxon.cck_basic_rates =
2369             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2370 }
2371
2372 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2373 {
2374         if (mode == IEEE80211_IF_TYPE_IBSS) {
2375                 const struct iwl3945_channel_info *ch_info;
2376
2377                 ch_info = iwl3945_get_channel_info(priv,
2378                         priv->band,
2379                         le16_to_cpu(priv->staging_rxon.channel));
2380
2381                 if (!ch_info || !is_channel_ibss(ch_info)) {
2382                         IWL_ERROR("channel %d not IBSS channel\n",
2383                                   le16_to_cpu(priv->staging_rxon.channel));
2384                         return -EINVAL;
2385                 }
2386         }
2387
2388         priv->iw_mode = mode;
2389
2390         iwl3945_connection_init_rx_config(priv);
2391         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2392
2393         iwl3945_clear_stations_table(priv);
2394
2395         /* dont commit rxon if rf-kill is on*/
2396         if (!iwl3945_is_ready_rf(priv))
2397                 return -EAGAIN;
2398
2399         cancel_delayed_work(&priv->scan_check);
2400         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2401                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2402                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2403                 return -EAGAIN;
2404         }
2405
2406         iwl3945_commit_rxon(priv);
2407
2408         return 0;
2409 }
2410
2411 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2412                                       struct ieee80211_tx_control *ctl,
2413                                       struct iwl3945_cmd *cmd,
2414                                       struct sk_buff *skb_frag,
2415                                       int last_frag)
2416 {
2417         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2418
2419         switch (keyinfo->alg) {
2420         case ALG_CCMP:
2421                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2422                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2423                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2424                 break;
2425
2426         case ALG_TKIP:
2427 #if 0
2428                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2429
2430                 if (last_frag)
2431                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2432                                8);
2433                 else
2434                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2435 #endif
2436                 break;
2437
2438         case ALG_WEP:
2439                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2440                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2441
2442                 if (keyinfo->keylen == 13)
2443                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2444
2445                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2446
2447                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2448                              "with key %d\n", ctl->key_idx);
2449                 break;
2450
2451         default:
2452                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2453                 break;
2454         }
2455 }
2456
2457 /*
2458  * handle build REPLY_TX command notification.
2459  */
2460 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2461                                   struct iwl3945_cmd *cmd,
2462                                   struct ieee80211_tx_control *ctrl,
2463                                   struct ieee80211_hdr *hdr,
2464                                   int is_unicast, u8 std_id)
2465 {
2466         __le16 *qc;
2467         u16 fc = le16_to_cpu(hdr->frame_control);
2468         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2469
2470         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2471         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2472                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2473                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2474                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2475                 if (ieee80211_is_probe_response(fc) &&
2476                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2477                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2478         } else {
2479                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2480                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2481         }
2482
2483         cmd->cmd.tx.sta_id = std_id;
2484         if (ieee80211_get_morefrag(hdr))
2485                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2486
2487         qc = ieee80211_get_qos_ctrl(hdr);
2488         if (qc) {
2489                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2490                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2491         } else
2492                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2493
2494         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2495                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2496                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2497         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2498                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2499                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2500         }
2501
2502         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2503                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2504
2505         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2506         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2507                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2508                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2509                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2510                 else
2511                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2512         } else
2513                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2514
2515         cmd->cmd.tx.driver_txop = 0;
2516         cmd->cmd.tx.tx_flags = tx_flags;
2517         cmd->cmd.tx.next_frame_len = 0;
2518 }
2519
2520 /**
2521  * iwl3945_get_sta_id - Find station's index within station table
2522  */
2523 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2524 {
2525         int sta_id;
2526         u16 fc = le16_to_cpu(hdr->frame_control);
2527
2528         /* If this frame is broadcast or management, use broadcast station id */
2529         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2530             is_multicast_ether_addr(hdr->addr1))
2531                 return priv->hw_setting.bcast_sta_id;
2532
2533         switch (priv->iw_mode) {
2534
2535         /* If we are a client station in a BSS network, use the special
2536          * AP station entry (that's the only station we communicate with) */
2537         case IEEE80211_IF_TYPE_STA:
2538                 return IWL_AP_ID;
2539
2540         /* If we are an AP, then find the station, or use BCAST */
2541         case IEEE80211_IF_TYPE_AP:
2542                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2543                 if (sta_id != IWL_INVALID_STATION)
2544                         return sta_id;
2545                 return priv->hw_setting.bcast_sta_id;
2546
2547         /* If this frame is going out to an IBSS network, find the station,
2548          * or create a new station table entry */
2549         case IEEE80211_IF_TYPE_IBSS: {
2550                 DECLARE_MAC_BUF(mac);
2551
2552                 /* Create new station table entry */
2553                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2554                 if (sta_id != IWL_INVALID_STATION)
2555                         return sta_id;
2556
2557                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2558
2559                 if (sta_id != IWL_INVALID_STATION)
2560                         return sta_id;
2561
2562                 IWL_DEBUG_DROP("Station %s not in station map. "
2563                                "Defaulting to broadcast...\n",
2564                                print_mac(mac, hdr->addr1));
2565                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2566                 return priv->hw_setting.bcast_sta_id;
2567         }
2568         default:
2569                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2570                 return priv->hw_setting.bcast_sta_id;
2571         }
2572 }
2573
2574 /*
2575  * start REPLY_TX command process
2576  */
2577 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2578                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2579 {
2580         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2581         struct iwl3945_tfd_frame *tfd;
2582         u32 *control_flags;
2583         int txq_id = ctl->queue;
2584         struct iwl3945_tx_queue *txq = NULL;
2585         struct iwl3945_queue *q = NULL;
2586         dma_addr_t phys_addr;
2587         dma_addr_t txcmd_phys;
2588         struct iwl3945_cmd *out_cmd = NULL;
2589         u16 len, idx, len_org;
2590         u8 id, hdr_len, unicast;
2591         u8 sta_id;
2592         u16 seq_number = 0;
2593         u16 fc;
2594         __le16 *qc;
2595         u8 wait_write_ptr = 0;
2596         unsigned long flags;
2597         int rc;
2598
2599         spin_lock_irqsave(&priv->lock, flags);
2600         if (iwl3945_is_rfkill(priv)) {
2601                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2602                 goto drop_unlock;
2603         }
2604
2605         if (!priv->vif) {
2606                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2607                 goto drop_unlock;
2608         }
2609
2610         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2611                 IWL_ERROR("ERROR: No TX rate available.\n");
2612                 goto drop_unlock;
2613         }
2614
2615         unicast = !is_multicast_ether_addr(hdr->addr1);
2616         id = 0;
2617
2618         fc = le16_to_cpu(hdr->frame_control);
2619
2620 #ifdef CONFIG_IWL3945_DEBUG
2621         if (ieee80211_is_auth(fc))
2622                 IWL_DEBUG_TX("Sending AUTH frame\n");
2623         else if (ieee80211_is_assoc_request(fc))
2624                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2625         else if (ieee80211_is_reassoc_request(fc))
2626                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2627 #endif
2628
2629         /* drop all data frame if we are not associated */
2630         if ((!iwl3945_is_associated(priv) ||
2631              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id)) &&
2632             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2633                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2634                 goto drop_unlock;
2635         }
2636
2637         spin_unlock_irqrestore(&priv->lock, flags);
2638
2639         hdr_len = ieee80211_get_hdrlen(fc);
2640
2641         /* Find (or create) index into station table for destination station */
2642         sta_id = iwl3945_get_sta_id(priv, hdr);
2643         if (sta_id == IWL_INVALID_STATION) {
2644                 DECLARE_MAC_BUF(mac);
2645
2646                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2647                                print_mac(mac, hdr->addr1));
2648                 goto drop;
2649         }
2650
2651         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2652
2653         qc = ieee80211_get_qos_ctrl(hdr);
2654         if (qc) {
2655                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2656                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2657                                 IEEE80211_SCTL_SEQ;
2658                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2659                         (hdr->seq_ctrl &
2660                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2661                 seq_number += 0x10;
2662         }
2663
2664         /* Descriptor for chosen Tx queue */
2665         txq = &priv->txq[txq_id];
2666         q = &txq->q;
2667
2668         spin_lock_irqsave(&priv->lock, flags);
2669
2670         /* Set up first empty TFD within this queue's circular TFD buffer */
2671         tfd = &txq->bd[q->write_ptr];
2672         memset(tfd, 0, sizeof(*tfd));
2673         control_flags = (u32 *) tfd;
2674         idx = get_cmd_index(q, q->write_ptr, 0);
2675
2676         /* Set up driver data for this TFD */
2677         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2678         txq->txb[q->write_ptr].skb[0] = skb;
2679         memcpy(&(txq->txb[q->write_ptr].status.control),
2680                ctl, sizeof(struct ieee80211_tx_control));
2681
2682         /* Init first empty entry in queue's array of Tx/cmd buffers */
2683         out_cmd = &txq->cmd[idx];
2684         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2685         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2686
2687         /*
2688          * Set up the Tx-command (not MAC!) header.
2689          * Store the chosen Tx queue and TFD index within the sequence field;
2690          * after Tx, uCode's Tx response will return this value so driver can
2691          * locate the frame within the tx queue and do post-tx processing.
2692          */
2693         out_cmd->hdr.cmd = REPLY_TX;
2694         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2695                                 INDEX_TO_SEQ(q->write_ptr)));
2696
2697         /* Copy MAC header from skb into command buffer */
2698         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2699
2700         /*
2701          * Use the first empty entry in this queue's command buffer array
2702          * to contain the Tx command and MAC header concatenated together
2703          * (payload data will be in another buffer).
2704          * Size of this varies, due to varying MAC header length.
2705          * If end is not dword aligned, we'll have 2 extra bytes at the end
2706          * of the MAC header (device reads on dword boundaries).
2707          * We'll tell device about this padding later.
2708          */
2709         len = priv->hw_setting.tx_cmd_len +
2710                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2711
2712         len_org = len;
2713         len = (len + 3) & ~3;
2714
2715         if (len_org != len)
2716                 len_org = 1;
2717         else
2718                 len_org = 0;
2719
2720         /* Physical address of this Tx command's header (not MAC header!),
2721          * within command buffer array. */
2722         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2723                      offsetof(struct iwl3945_cmd, hdr);
2724
2725         /* Add buffer containing Tx command and MAC(!) header to TFD's
2726          * first entry */
2727         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2728
2729         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2730                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2731
2732         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2733          * if any (802.11 null frames have no payload). */
2734         len = skb->len - hdr_len;
2735         if (len) {
2736                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2737                                            len, PCI_DMA_TODEVICE);
2738                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2739         }
2740
2741         if (!len)
2742                 /* If there is no payload, then we use only one Tx buffer */
2743                 *control_flags = TFD_CTL_COUNT_SET(1);
2744         else
2745                 /* Else use 2 buffers.
2746                  * Tell 3945 about any padding after MAC header */
2747                 *control_flags = TFD_CTL_COUNT_SET(2) |
2748                         TFD_CTL_PAD_SET(U32_PAD(len));
2749
2750         /* Total # bytes to be transmitted */
2751         len = (u16)skb->len;
2752         out_cmd->cmd.tx.len = cpu_to_le16(len);
2753
2754         /* TODO need this for burst mode later on */
2755         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2756
2757         /* set is_hcca to 0; it probably will never be implemented */
2758         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2759
2760         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2761         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2762
2763         if (!ieee80211_get_morefrag(hdr)) {
2764                 txq->need_update = 1;
2765                 if (qc) {
2766                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2767                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2768                 }
2769         } else {
2770                 wait_write_ptr = 1;
2771                 txq->need_update = 0;
2772         }
2773
2774         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2775                            sizeof(out_cmd->cmd.tx));
2776
2777         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2778                            ieee80211_get_hdrlen(fc));
2779
2780         /* Tell device the write index *just past* this latest filled TFD */
2781         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2782         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2783         spin_unlock_irqrestore(&priv->lock, flags);
2784
2785         if (rc)
2786                 return rc;
2787
2788         if ((iwl3945_queue_space(q) < q->high_mark)
2789             && priv->mac80211_registered) {
2790                 if (wait_write_ptr) {
2791                         spin_lock_irqsave(&priv->lock, flags);
2792                         txq->need_update = 1;
2793                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2794                         spin_unlock_irqrestore(&priv->lock, flags);
2795                 }
2796
2797                 ieee80211_stop_queue(priv->hw, ctl->queue);
2798         }
2799
2800         return 0;
2801
2802 drop_unlock:
2803         spin_unlock_irqrestore(&priv->lock, flags);
2804 drop:
2805         return -1;
2806 }
2807
2808 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2809 {
2810         const struct ieee80211_supported_band *sband = NULL;
2811         struct ieee80211_rate *rate;
2812         int i;
2813
2814         sband = iwl3945_get_band(priv, priv->band);
2815         if (!sband) {
2816                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2817                 return;
2818         }
2819
2820         priv->active_rate = 0;
2821         priv->active_rate_basic = 0;
2822
2823         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2824                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2825
2826         for (i = 0; i < sband->n_bitrates; i++) {
2827                 rate = &sband->bitrates[i];
2828                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2829                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2830                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2831                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2832                         priv->active_rate |= (1 << rate->hw_value);
2833                 }
2834         }
2835
2836         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2837                        priv->active_rate, priv->active_rate_basic);
2838
2839         /*
2840          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2841          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2842          * OFDM
2843          */
2844         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2845                 priv->staging_rxon.cck_basic_rates =
2846                     ((priv->active_rate_basic &
2847                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2848         else
2849                 priv->staging_rxon.cck_basic_rates =
2850                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2851
2852         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2853                 priv->staging_rxon.ofdm_basic_rates =
2854                     ((priv->active_rate_basic &
2855                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2856                       IWL_FIRST_OFDM_RATE) & 0xFF;
2857         else
2858                 priv->staging_rxon.ofdm_basic_rates =
2859                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2860 }
2861
2862 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2863 {
2864         unsigned long flags;
2865
2866         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2867                 return;
2868
2869         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2870                           disable_radio ? "OFF" : "ON");
2871
2872         if (disable_radio) {
2873                 iwl3945_scan_cancel(priv);
2874                 /* FIXME: This is a workaround for AP */
2875                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2876                         spin_lock_irqsave(&priv->lock, flags);
2877                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2878                                     CSR_UCODE_SW_BIT_RFKILL);
2879                         spin_unlock_irqrestore(&priv->lock, flags);
2880                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2881                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2882                 }
2883                 return;
2884         }
2885
2886         spin_lock_irqsave(&priv->lock, flags);
2887         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2888
2889         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2890         spin_unlock_irqrestore(&priv->lock, flags);
2891
2892         /* wake up ucode */
2893         msleep(10);
2894
2895         spin_lock_irqsave(&priv->lock, flags);
2896         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2897         if (!iwl3945_grab_nic_access(priv))
2898                 iwl3945_release_nic_access(priv);
2899         spin_unlock_irqrestore(&priv->lock, flags);
2900
2901         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2902                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2903                                   "disabled by HW switch\n");
2904                 return;
2905         }
2906
2907         queue_work(priv->workqueue, &priv->restart);
2908         return;
2909 }
2910
2911 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2912                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2913 {
2914         u16 fc =
2915             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2916
2917         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2918                 return;
2919
2920         if (!(fc & IEEE80211_FCTL_PROTECTED))
2921                 return;
2922
2923         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2924         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2925         case RX_RES_STATUS_SEC_TYPE_TKIP:
2926                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2927                     RX_RES_STATUS_BAD_ICV_MIC)
2928                         stats->flag |= RX_FLAG_MMIC_ERROR;
2929         case RX_RES_STATUS_SEC_TYPE_WEP:
2930         case RX_RES_STATUS_SEC_TYPE_CCMP:
2931                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2932                     RX_RES_STATUS_DECRYPT_OK) {
2933                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2934                         stats->flag |= RX_FLAG_DECRYPTED;
2935                 }
2936                 break;
2937
2938         default:
2939                 break;
2940         }
2941 }
2942
2943 #define IWL_PACKET_RETRY_TIME HZ
2944
2945 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2946 {
2947         u16 sc = le16_to_cpu(header->seq_ctrl);
2948         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2949         u16 frag = sc & IEEE80211_SCTL_FRAG;
2950         u16 *last_seq, *last_frag;
2951         unsigned long *last_time;
2952
2953         switch (priv->iw_mode) {
2954         case IEEE80211_IF_TYPE_IBSS:{
2955                 struct list_head *p;
2956                 struct iwl3945_ibss_seq *entry = NULL;
2957                 u8 *mac = header->addr2;
2958                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2959
2960                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2961                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
2962                         if (!compare_ether_addr(entry->mac, mac))
2963                                 break;
2964                 }
2965                 if (p == &priv->ibss_mac_hash[index]) {
2966                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2967                         if (!entry) {
2968                                 IWL_ERROR("Cannot malloc new mac entry\n");
2969                                 return 0;
2970                         }
2971                         memcpy(entry->mac, mac, ETH_ALEN);
2972                         entry->seq_num = seq;
2973                         entry->frag_num = frag;
2974                         entry->packet_time = jiffies;
2975                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2976                         return 0;
2977                 }
2978                 last_seq = &entry->seq_num;
2979                 last_frag = &entry->frag_num;
2980                 last_time = &entry->packet_time;
2981                 break;
2982         }
2983         case IEEE80211_IF_TYPE_STA:
2984                 last_seq = &priv->last_seq_num;
2985                 last_frag = &priv->last_frag_num;
2986                 last_time = &priv->last_packet_time;
2987                 break;
2988         default:
2989                 return 0;
2990         }
2991         if ((*last_seq == seq) &&
2992             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2993                 if (*last_frag == frag)
2994                         goto drop;
2995                 if (*last_frag + 1 != frag)
2996                         /* out-of-order fragment */
2997                         goto drop;
2998         } else
2999                 *last_seq = seq;
3000
3001         *last_frag = frag;
3002         *last_time = jiffies;
3003         return 0;
3004
3005  drop:
3006         return 1;
3007 }
3008
3009 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3010
3011 #include "iwl-spectrum.h"
3012
3013 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3014 #define BEACON_TIME_MASK_HIGH   0xFF000000
3015 #define TIME_UNIT               1024
3016
3017 /*
3018  * extended beacon time format
3019  * time in usec will be changed into a 32-bit value in 8:24 format
3020  * the high 1 byte is the beacon counts
3021  * the lower 3 bytes is the time in usec within one beacon interval
3022  */
3023
3024 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3025 {
3026         u32 quot;
3027         u32 rem;
3028         u32 interval = beacon_interval * 1024;
3029
3030         if (!interval || !usec)
3031                 return 0;
3032
3033         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3034         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3035
3036         return (quot << 24) + rem;
3037 }
3038
3039 /* base is usually what we get from ucode with each received frame,
3040  * the same as HW timer counter counting down
3041  */
3042
3043 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3044 {
3045         u32 base_low = base & BEACON_TIME_MASK_LOW;
3046         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3047         u32 interval = beacon_interval * TIME_UNIT;
3048         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3049             (addon & BEACON_TIME_MASK_HIGH);
3050
3051         if (base_low > addon_low)
3052                 res += base_low - addon_low;
3053         else if (base_low < addon_low) {
3054                 res += interval + base_low - addon_low;
3055                 res += (1 << 24);
3056         } else
3057                 res += (1 << 24);
3058
3059         return cpu_to_le32(res);
3060 }
3061
3062 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3063                                struct ieee80211_measurement_params *params,
3064                                u8 type)
3065 {
3066         struct iwl3945_spectrum_cmd spectrum;
3067         struct iwl3945_rx_packet *res;
3068         struct iwl3945_host_cmd cmd = {
3069                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3070                 .data = (void *)&spectrum,
3071                 .meta.flags = CMD_WANT_SKB,
3072         };
3073         u32 add_time = le64_to_cpu(params->start_time);
3074         int rc;
3075         int spectrum_resp_status;
3076         int duration = le16_to_cpu(params->duration);
3077
3078         if (iwl3945_is_associated(priv))
3079                 add_time =
3080                     iwl3945_usecs_to_beacons(
3081                         le64_to_cpu(params->start_time) - priv->last_tsf,
3082                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3083
3084         memset(&spectrum, 0, sizeof(spectrum));
3085
3086         spectrum.channel_count = cpu_to_le16(1);
3087         spectrum.flags =
3088             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3089         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3090         cmd.len = sizeof(spectrum);
3091         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3092
3093         if (iwl3945_is_associated(priv))
3094                 spectrum.start_time =
3095                     iwl3945_add_beacon_time(priv->last_beacon_time,
3096                                 add_time,
3097                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3098         else
3099                 spectrum.start_time = 0;
3100
3101         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3102         spectrum.channels[0].channel = params->channel;
3103         spectrum.channels[0].type = type;
3104         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3105                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3106                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3107
3108         rc = iwl3945_send_cmd_sync(priv, &cmd);
3109         if (rc)
3110                 return rc;
3111
3112         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3113         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3114                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3115                 rc = -EIO;
3116         }
3117
3118         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3119         switch (spectrum_resp_status) {
3120         case 0:         /* Command will be handled */
3121                 if (res->u.spectrum.id != 0xff) {
3122                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3123                                                 res->u.spectrum.id);
3124                         priv->measurement_status &= ~MEASUREMENT_READY;
3125                 }
3126                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3127                 rc = 0;
3128                 break;
3129
3130         case 1:         /* Command will not be handled */
3131                 rc = -EAGAIN;
3132                 break;
3133         }
3134
3135         dev_kfree_skb_any(cmd.meta.u.skb);
3136
3137         return rc;
3138 }
3139 #endif
3140
3141 static void iwl3945_txstatus_to_ieee(struct iwl3945_priv *priv,
3142                                  struct iwl3945_tx_info *tx_sta)
3143 {
3144
3145         tx_sta->status.ack_signal = 0;
3146         tx_sta->status.excessive_retries = 0;
3147         tx_sta->status.queue_length = 0;
3148         tx_sta->status.queue_number = 0;
3149
3150         if (in_interrupt())
3151                 ieee80211_tx_status_irqsafe(priv->hw,
3152                                             tx_sta->skb[0], &(tx_sta->status));
3153         else
3154                 ieee80211_tx_status(priv->hw,
3155                                     tx_sta->skb[0], &(tx_sta->status));
3156
3157         tx_sta->skb[0] = NULL;
3158 }
3159
3160 /**
3161  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3162  *
3163  * When FW advances 'R' index, all entries between old and new 'R' index
3164  * need to be reclaimed. As result, some free space forms. If there is
3165  * enough free space (> low mark), wake the stack that feeds us.
3166  */
3167 static int iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv, int txq_id, int index)
3168 {
3169         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3170         struct iwl3945_queue *q = &txq->q;
3171         int nfreed = 0;
3172
3173         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3174                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3175                           "is out of range [0-%d] %d %d.\n", txq_id,
3176                           index, q->n_bd, q->write_ptr, q->read_ptr);
3177                 return 0;
3178         }
3179
3180         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3181                 q->read_ptr != index;
3182                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3183                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3184                         iwl3945_txstatus_to_ieee(priv,
3185                                         &(txq->txb[txq->q.read_ptr]));
3186                         iwl3945_hw_txq_free_tfd(priv, txq);
3187                 } else if (nfreed > 1) {
3188                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3189                                         q->write_ptr, q->read_ptr);
3190                         queue_work(priv->workqueue, &priv->restart);
3191                 }
3192                 nfreed++;
3193         }
3194
3195         if (iwl3945_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3196                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3197                         priv->mac80211_registered)
3198                 ieee80211_wake_queue(priv->hw, txq_id);
3199
3200
3201         return nfreed;
3202 }
3203
3204 static int iwl3945_is_tx_success(u32 status)
3205 {
3206         return (status & 0xFF) == 0x1;
3207 }
3208
3209 /******************************************************************************
3210  *
3211  * Generic RX handler implementations
3212  *
3213  ******************************************************************************/
3214 /**
3215  * iwl3945_rx_reply_tx - Handle Tx response
3216  */
3217 static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
3218                             struct iwl3945_rx_mem_buffer *rxb)
3219 {
3220         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3221         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3222         int txq_id = SEQ_TO_QUEUE(sequence);
3223         int index = SEQ_TO_INDEX(sequence);
3224         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3225         struct ieee80211_tx_status *tx_status;
3226         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3227         u32  status = le32_to_cpu(tx_resp->status);
3228
3229         if ((index >= txq->q.n_bd) || (iwl3945_x2_queue_used(&txq->q, index) == 0)) {
3230                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3231                           "is out of range [0-%d] %d %d\n", txq_id,
3232                           index, txq->q.n_bd, txq->q.write_ptr,
3233                           txq->q.read_ptr);
3234                 return;
3235         }
3236
3237         tx_status = &(txq->txb[txq->q.read_ptr].status);
3238
3239         tx_status->retry_count = tx_resp->failure_frame;
3240         tx_status->queue_number = status;
3241         tx_status->queue_length = tx_resp->bt_kill_count;
3242         tx_status->queue_length |= tx_resp->failure_rts;
3243
3244         tx_status->flags =
3245             iwl3945_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3246
3247         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3248                         txq_id, iwl3945_get_tx_fail_reason(status), status,
3249                         tx_resp->rate, tx_resp->failure_frame);
3250
3251         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3252         if (index != -1)
3253                 iwl3945_tx_queue_reclaim(priv, txq_id, index);
3254
3255         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3256                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3257 }
3258
3259
3260 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3261                                struct iwl3945_rx_mem_buffer *rxb)
3262 {
3263         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3264         struct iwl3945_alive_resp *palive;
3265         struct delayed_work *pwork;
3266
3267         palive = &pkt->u.alive_frame;
3268
3269         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3270                        "0x%01X 0x%01X\n",
3271                        palive->is_valid, palive->ver_type,
3272                        palive->ver_subtype);
3273
3274         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3275                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3276                 memcpy(&priv->card_alive_init,
3277                        &pkt->u.alive_frame,
3278                        sizeof(struct iwl3945_init_alive_resp));
3279                 pwork = &priv->init_alive_start;
3280         } else {
3281                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3282                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3283                        sizeof(struct iwl3945_alive_resp));
3284                 pwork = &priv->alive_start;
3285                 iwl3945_disable_events(priv);
3286         }
3287
3288         /* We delay the ALIVE response by 5ms to
3289          * give the HW RF Kill time to activate... */
3290         if (palive->is_valid == UCODE_VALID_OK)
3291                 queue_delayed_work(priv->workqueue, pwork,
3292                                    msecs_to_jiffies(5));
3293         else
3294                 IWL_WARNING("uCode did not respond OK.\n");
3295 }
3296
3297 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3298                                  struct iwl3945_rx_mem_buffer *rxb)
3299 {
3300         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3301
3302         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3303         return;
3304 }
3305
3306 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3307                                struct iwl3945_rx_mem_buffer *rxb)
3308 {
3309         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3310
3311         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3312                 "seq 0x%04X ser 0x%08X\n",
3313                 le32_to_cpu(pkt->u.err_resp.error_type),
3314                 get_cmd_string(pkt->u.err_resp.cmd_id),
3315                 pkt->u.err_resp.cmd_id,
3316                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3317                 le32_to_cpu(pkt->u.err_resp.error_info));
3318 }
3319
3320 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3321
3322 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3323 {
3324         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3325         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3326         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3327         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3328                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3329         rxon->channel = csa->channel;
3330         priv->staging_rxon.channel = csa->channel;
3331 }
3332
3333 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3334                                           struct iwl3945_rx_mem_buffer *rxb)
3335 {
3336 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3337         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3338         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3339
3340         if (!report->state) {
3341                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3342                           "Spectrum Measure Notification: Start\n");
3343                 return;
3344         }
3345
3346         memcpy(&priv->measure_report, report, sizeof(*report));
3347         priv->measurement_status |= MEASUREMENT_READY;
3348 #endif
3349 }
3350
3351 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3352                                   struct iwl3945_rx_mem_buffer *rxb)
3353 {
3354 #ifdef CONFIG_IWL3945_DEBUG
3355         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3356         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3357         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3358                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3359 #endif
3360 }
3361
3362 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3363                                              struct iwl3945_rx_mem_buffer *rxb)
3364 {
3365         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3366         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3367                         "notification for %s:\n",
3368                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3369         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3370 }
3371
3372 static void iwl3945_bg_beacon_update(struct work_struct *work)
3373 {
3374         struct iwl3945_priv *priv =
3375                 container_of(work, struct iwl3945_priv, beacon_update);
3376         struct sk_buff *beacon;
3377
3378         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3379         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3380
3381         if (!beacon) {
3382                 IWL_ERROR("update beacon failed\n");
3383                 return;
3384         }
3385
3386         mutex_lock(&priv->mutex);
3387         /* new beacon skb is allocated every time; dispose previous.*/
3388         if (priv->ibss_beacon)
3389                 dev_kfree_skb(priv->ibss_beacon);
3390
3391         priv->ibss_beacon = beacon;
3392         mutex_unlock(&priv->mutex);
3393
3394         iwl3945_send_beacon_cmd(priv);
3395 }
3396
3397 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3398                                 struct iwl3945_rx_mem_buffer *rxb)
3399 {
3400 #ifdef CONFIG_IWL3945_DEBUG
3401         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3402         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3403         u8 rate = beacon->beacon_notify_hdr.rate;
3404
3405         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3406                 "tsf %d %d rate %d\n",
3407                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3408                 beacon->beacon_notify_hdr.failure_frame,
3409                 le32_to_cpu(beacon->ibss_mgr_status),
3410                 le32_to_cpu(beacon->high_tsf),
3411                 le32_to_cpu(beacon->low_tsf), rate);
3412 #endif
3413
3414         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3415             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3416                 queue_work(priv->workqueue, &priv->beacon_update);
3417 }
3418
3419 /* Service response to REPLY_SCAN_CMD (0x80) */
3420 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3421                               struct iwl3945_rx_mem_buffer *rxb)
3422 {
3423 #ifdef CONFIG_IWL3945_DEBUG
3424         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3425         struct iwl3945_scanreq_notification *notif =
3426             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3427
3428         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3429 #endif
3430 }
3431
3432 /* Service SCAN_START_NOTIFICATION (0x82) */
3433 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3434                                     struct iwl3945_rx_mem_buffer *rxb)
3435 {
3436         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3437         struct iwl3945_scanstart_notification *notif =
3438             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3439         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3440         IWL_DEBUG_SCAN("Scan start: "
3441                        "%d [802.11%s] "
3442                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3443                        notif->channel,
3444                        notif->band ? "bg" : "a",
3445                        notif->tsf_high,
3446                        notif->tsf_low, notif->status, notif->beacon_timer);
3447 }
3448
3449 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3450 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3451                                       struct iwl3945_rx_mem_buffer *rxb)
3452 {
3453         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3454         struct iwl3945_scanresults_notification *notif =
3455             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3456
3457         IWL_DEBUG_SCAN("Scan ch.res: "
3458                        "%d [802.11%s] "
3459                        "(TSF: 0x%08X:%08X) - %d "
3460                        "elapsed=%lu usec (%dms since last)\n",
3461                        notif->channel,
3462                        notif->band ? "bg" : "a",
3463                        le32_to_cpu(notif->tsf_high),
3464                        le32_to_cpu(notif->tsf_low),
3465                        le32_to_cpu(notif->statistics[0]),
3466                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3467                        jiffies_to_msecs(elapsed_jiffies
3468                                         (priv->last_scan_jiffies, jiffies)));
3469
3470         priv->last_scan_jiffies = jiffies;
3471         priv->next_scan_jiffies = 0;
3472 }
3473
3474 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3475 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3476                                        struct iwl3945_rx_mem_buffer *rxb)
3477 {
3478         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3479         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3480
3481         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3482                        scan_notif->scanned_channels,
3483                        scan_notif->tsf_low,
3484                        scan_notif->tsf_high, scan_notif->status);
3485
3486         /* The HW is no longer scanning */
3487         clear_bit(STATUS_SCAN_HW, &priv->status);
3488
3489         /* The scan completion notification came in, so kill that timer... */
3490         cancel_delayed_work(&priv->scan_check);
3491
3492         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3493                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3494                        jiffies_to_msecs(elapsed_jiffies
3495                                         (priv->scan_pass_start, jiffies)));
3496
3497         /* Remove this scanned band from the list
3498          * of pending bands to scan */
3499         priv->scan_bands--;
3500
3501         /* If a request to abort was given, or the scan did not succeed
3502          * then we reset the scan state machine and terminate,
3503          * re-queuing another scan if one has been requested */
3504         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3505                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3506                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3507         } else {
3508                 /* If there are more bands on this scan pass reschedule */
3509                 if (priv->scan_bands > 0)
3510                         goto reschedule;
3511         }
3512
3513         priv->last_scan_jiffies = jiffies;
3514         priv->next_scan_jiffies = 0;
3515         IWL_DEBUG_INFO("Setting scan to off\n");
3516
3517         clear_bit(STATUS_SCANNING, &priv->status);
3518
3519         IWL_DEBUG_INFO("Scan took %dms\n",
3520                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3521
3522         queue_work(priv->workqueue, &priv->scan_completed);
3523
3524         return;
3525
3526 reschedule:
3527         priv->scan_pass_start = jiffies;
3528         queue_work(priv->workqueue, &priv->request_scan);
3529 }
3530
3531 /* Handle notification from uCode that card's power state is changing
3532  * due to software, hardware, or critical temperature RFKILL */
3533 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3534                                     struct iwl3945_rx_mem_buffer *rxb)
3535 {
3536         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3537         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3538         unsigned long status = priv->status;
3539
3540         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3541                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3542                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3543
3544         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3545                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3546
3547         if (flags & HW_CARD_DISABLED)
3548                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3549         else
3550                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3551
3552
3553         if (flags & SW_CARD_DISABLED)
3554                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3555         else
3556                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3557
3558         iwl3945_scan_cancel(priv);
3559
3560         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3561              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3562             (test_bit(STATUS_RF_KILL_SW, &status) !=
3563              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3564                 queue_work(priv->workqueue, &priv->rf_kill);
3565         else
3566                 wake_up_interruptible(&priv->wait_command_queue);
3567 }
3568
3569 /**
3570  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3571  *
3572  * Setup the RX handlers for each of the reply types sent from the uCode
3573  * to the host.
3574  *
3575  * This function chains into the hardware specific files for them to setup
3576  * any hardware specific handlers as well.
3577  */
3578 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3579 {
3580         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3581         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3582         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3583         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3584         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3585             iwl3945_rx_spectrum_measure_notif;
3586         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3587         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3588             iwl3945_rx_pm_debug_statistics_notif;
3589         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3590
3591         /*
3592          * The same handler is used for both the REPLY to a discrete
3593          * statistics request from the host as well as for the periodic
3594          * statistics notifications (after received beacons) from the uCode.
3595          */
3596         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3597         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3598
3599         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3600         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3601         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3602             iwl3945_rx_scan_results_notif;
3603         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3604             iwl3945_rx_scan_complete_notif;
3605         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3606         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
3607
3608         /* Set up hardware specific Rx handlers */
3609         iwl3945_hw_rx_handler_setup(priv);
3610 }
3611
3612 /**
3613  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3614  * @rxb: Rx buffer to reclaim
3615  *
3616  * If an Rx buffer has an async callback associated with it the callback
3617  * will be executed.  The attached skb (if present) will only be freed
3618  * if the callback returns 1
3619  */
3620 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3621                                 struct iwl3945_rx_mem_buffer *rxb)
3622 {
3623         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3624         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3625         int txq_id = SEQ_TO_QUEUE(sequence);
3626         int index = SEQ_TO_INDEX(sequence);
3627         int huge = sequence & SEQ_HUGE_FRAME;
3628         int cmd_index;
3629         struct iwl3945_cmd *cmd;
3630
3631         /* If a Tx command is being handled and it isn't in the actual
3632          * command queue then there a command routing bug has been introduced
3633          * in the queue management code. */
3634         if (txq_id != IWL_CMD_QUEUE_NUM)
3635                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3636                           txq_id, pkt->hdr.cmd);
3637         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3638
3639         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3640         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3641
3642         /* Input error checking is done when commands are added to queue. */
3643         if (cmd->meta.flags & CMD_WANT_SKB) {
3644                 cmd->meta.source->u.skb = rxb->skb;
3645                 rxb->skb = NULL;
3646         } else if (cmd->meta.u.callback &&
3647                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3648                 rxb->skb = NULL;
3649
3650         iwl3945_tx_queue_reclaim(priv, txq_id, index);
3651
3652         if (!(cmd->meta.flags & CMD_ASYNC)) {
3653                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3654                 wake_up_interruptible(&priv->wait_command_queue);
3655         }
3656 }
3657
3658 /************************** RX-FUNCTIONS ****************************/
3659 /*
3660  * Rx theory of operation
3661  *
3662  * The host allocates 32 DMA target addresses and passes the host address
3663  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3664  * 0 to 31
3665  *
3666  * Rx Queue Indexes
3667  * The host/firmware share two index registers for managing the Rx buffers.
3668  *
3669  * The READ index maps to the first position that the firmware may be writing
3670  * to -- the driver can read up to (but not including) this position and get
3671  * good data.
3672  * The READ index is managed by the firmware once the card is enabled.
3673  *
3674  * The WRITE index maps to the last position the driver has read from -- the
3675  * position preceding WRITE is the last slot the firmware can place a packet.
3676  *
3677  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3678  * WRITE = READ.
3679  *
3680  * During initialization, the host sets up the READ queue position to the first
3681  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3682  *
3683  * When the firmware places a packet in a buffer, it will advance the READ index
3684  * and fire the RX interrupt.  The driver can then query the READ index and
3685  * process as many packets as possible, moving the WRITE index forward as it
3686  * resets the Rx queue buffers with new memory.
3687  *
3688  * The management in the driver is as follows:
3689  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3690  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3691  *   to replenish the iwl->rxq->rx_free.
3692  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3693  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3694  *   'processed' and 'read' driver indexes as well)
3695  * + A received packet is processed and handed to the kernel network stack,
3696  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3697  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3698  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3699  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3700  *   were enough free buffers and RX_STALLED is set it is cleared.
3701  *
3702  *
3703  * Driver sequence:
3704  *
3705  * iwl3945_rx_queue_alloc()   Allocates rx_free
3706  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3707  *                            iwl3945_rx_queue_restock
3708  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3709  *                            queue, updates firmware pointers, and updates
3710  *                            the WRITE index.  If insufficient rx_free buffers
3711  *                            are available, schedules iwl3945_rx_replenish
3712  *
3713  * -- enable interrupts --
3714  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3715  *                            READ INDEX, detaching the SKB from the pool.
3716  *                            Moves the packet buffer from queue to rx_used.
3717  *                            Calls iwl3945_rx_queue_restock to refill any empty
3718  *                            slots.
3719  * ...
3720  *
3721  */
3722
3723 /**
3724  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3725  */
3726 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3727 {
3728         int s = q->read - q->write;
3729         if (s <= 0)
3730                 s += RX_QUEUE_SIZE;
3731         /* keep some buffer to not confuse full and empty queue */
3732         s -= 2;
3733         if (s < 0)
3734                 s = 0;
3735         return s;
3736 }
3737
3738 /**
3739  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3740  */
3741 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3742 {
3743         u32 reg = 0;
3744         int rc = 0;
3745         unsigned long flags;
3746
3747         spin_lock_irqsave(&q->lock, flags);
3748
3749         if (q->need_update == 0)
3750                 goto exit_unlock;
3751
3752         /* If power-saving is in use, make sure device is awake */
3753         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3754                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3755
3756                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3757                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3758                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3759                         goto exit_unlock;
3760                 }
3761
3762                 rc = iwl3945_grab_nic_access(priv);
3763                 if (rc)
3764                         goto exit_unlock;
3765
3766                 /* Device expects a multiple of 8 */
3767                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3768                                      q->write & ~0x7);
3769                 iwl3945_release_nic_access(priv);
3770
3771         /* Else device is assumed to be awake */
3772         } else
3773                 /* Device expects a multiple of 8 */
3774                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3775
3776
3777         q->need_update = 0;
3778
3779  exit_unlock:
3780         spin_unlock_irqrestore(&q->lock, flags);
3781         return rc;
3782 }
3783
3784 /**
3785  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3786  */
3787 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3788                                           dma_addr_t dma_addr)
3789 {
3790         return cpu_to_le32((u32)dma_addr);
3791 }
3792
3793 /**
3794  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3795  *
3796  * If there are slots in the RX queue that need to be restocked,
3797  * and we have free pre-allocated buffers, fill the ranks as much
3798  * as we can, pulling from rx_free.
3799  *
3800  * This moves the 'write' index forward to catch up with 'processed', and
3801  * also updates the memory address in the firmware to reference the new
3802  * target buffer.
3803  */
3804 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3805 {
3806         struct iwl3945_rx_queue *rxq = &priv->rxq;
3807         struct list_head *element;
3808         struct iwl3945_rx_mem_buffer *rxb;
3809         unsigned long flags;
3810         int write, rc;
3811
3812         spin_lock_irqsave(&rxq->lock, flags);
3813         write = rxq->write & ~0x7;
3814         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3815                 /* Get next free Rx buffer, remove from free list */
3816                 element = rxq->rx_free.next;
3817                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3818                 list_del(element);
3819
3820                 /* Point to Rx buffer via next RBD in circular buffer */
3821                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3822                 rxq->queue[rxq->write] = rxb;
3823                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3824                 rxq->free_count--;
3825         }
3826         spin_unlock_irqrestore(&rxq->lock, flags);
3827         /* If the pre-allocated buffer pool is dropping low, schedule to
3828          * refill it */
3829         if (rxq->free_count <= RX_LOW_WATERMARK)
3830                 queue_work(priv->workqueue, &priv->rx_replenish);
3831
3832
3833         /* If we've added more space for the firmware to place data, tell it.
3834          * Increment device's write pointer in multiples of 8. */
3835         if ((write != (rxq->write & ~0x7))
3836             || (abs(rxq->write - rxq->read) > 7)) {
3837                 spin_lock_irqsave(&rxq->lock, flags);
3838                 rxq->need_update = 1;
3839                 spin_unlock_irqrestore(&rxq->lock, flags);
3840                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3841                 if (rc)
3842                         return rc;
3843         }
3844
3845         return 0;
3846 }
3847
3848 /**
3849  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3850  *
3851  * When moving to rx_free an SKB is allocated for the slot.
3852  *
3853  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3854  * This is called as a scheduled work item (except for during initialization)
3855  */
3856 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3857 {
3858         struct iwl3945_rx_queue *rxq = &priv->rxq;
3859         struct list_head *element;
3860         struct iwl3945_rx_mem_buffer *rxb;
3861         unsigned long flags;
3862         spin_lock_irqsave(&rxq->lock, flags);
3863         while (!list_empty(&rxq->rx_used)) {
3864                 element = rxq->rx_used.next;
3865                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3866
3867                 /* Alloc a new receive buffer */
3868                 rxb->skb =
3869                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3870                 if (!rxb->skb) {
3871                         if (net_ratelimit())
3872                                 printk(KERN_CRIT DRV_NAME
3873                                        ": Can not allocate SKB buffers\n");
3874                         /* We don't reschedule replenish work here -- we will
3875                          * call the restock method and if it still needs
3876                          * more buffers it will schedule replenish */
3877                         break;
3878                 }
3879
3880                 /* If radiotap head is required, reserve some headroom here.
3881                  * The physical head count is a variable rx_stats->phy_count.
3882                  * We reserve 4 bytes here. Plus these extra bytes, the
3883                  * headroom of the physical head should be enough for the
3884                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3885                  */
3886                 skb_reserve(rxb->skb, 4);
3887
3888                 priv->alloc_rxb_skb++;
3889                 list_del(element);
3890
3891                 /* Get physical address of RB/SKB */
3892                 rxb->dma_addr =
3893                     pci_map_single(priv->pci_dev, rxb->skb->data,
3894                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3895                 list_add_tail(&rxb->list, &rxq->rx_free);
3896                 rxq->free_count++;
3897         }
3898         spin_unlock_irqrestore(&rxq->lock, flags);
3899 }
3900
3901 /*
3902  * this should be called while priv->lock is locked
3903  */
3904 static void __iwl3945_rx_replenish(void *data)
3905 {
3906         struct iwl3945_priv *priv = data;
3907
3908         iwl3945_rx_allocate(priv);
3909         iwl3945_rx_queue_restock(priv);
3910 }
3911
3912
3913 void iwl3945_rx_replenish(void *data)
3914 {
3915         struct iwl3945_priv *priv = data;
3916         unsigned long flags;
3917
3918         iwl3945_rx_allocate(priv);
3919
3920         spin_lock_irqsave(&priv->lock, flags);
3921         iwl3945_rx_queue_restock(priv);
3922         spin_unlock_irqrestore(&priv->lock, flags);
3923 }
3924
3925 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3926  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3927  * This free routine walks the list of POOL entries and if SKB is set to
3928  * non NULL it is unmapped and freed
3929  */
3930 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3931 {
3932         int i;
3933         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3934                 if (rxq->pool[i].skb != NULL) {
3935                         pci_unmap_single(priv->pci_dev,
3936                                          rxq->pool[i].dma_addr,
3937                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3938                         dev_kfree_skb(rxq->pool[i].skb);
3939                 }
3940         }
3941
3942         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3943                             rxq->dma_addr);
3944         rxq->bd = NULL;
3945 }
3946
3947 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3948 {
3949         struct iwl3945_rx_queue *rxq = &priv->rxq;
3950         struct pci_dev *dev = priv->pci_dev;
3951         int i;
3952
3953         spin_lock_init(&rxq->lock);
3954         INIT_LIST_HEAD(&rxq->rx_free);
3955         INIT_LIST_HEAD(&rxq->rx_used);
3956
3957         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3958         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3959         if (!rxq->bd)
3960                 return -ENOMEM;
3961
3962         /* Fill the rx_used queue with _all_ of the Rx buffers */
3963         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3964                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3965
3966         /* Set us so that we have processed and used all buffers, but have
3967          * not restocked the Rx queue with fresh buffers */
3968         rxq->read = rxq->write = 0;
3969         rxq->free_count = 0;
3970         rxq->need_update = 0;
3971         return 0;
3972 }
3973
3974 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3975 {
3976         unsigned long flags;
3977         int i;
3978         spin_lock_irqsave(&rxq->lock, flags);
3979         INIT_LIST_HEAD(&rxq->rx_free);
3980         INIT_LIST_HEAD(&rxq->rx_used);
3981         /* Fill the rx_used queue with _all_ of the Rx buffers */
3982         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3983                 /* In the reset function, these buffers may have been allocated
3984                  * to an SKB, so we need to unmap and free potential storage */
3985                 if (rxq->pool[i].skb != NULL) {
3986                         pci_unmap_single(priv->pci_dev,
3987                                          rxq->pool[i].dma_addr,
3988                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3989                         priv->alloc_rxb_skb--;
3990                         dev_kfree_skb(rxq->pool[i].skb);
3991                         rxq->pool[i].skb = NULL;
3992                 }
3993                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3994         }
3995
3996         /* Set us so that we have processed and used all buffers, but have
3997          * not restocked the Rx queue with fresh buffers */
3998         rxq->read = rxq->write = 0;
3999         rxq->free_count = 0;
4000         spin_unlock_irqrestore(&rxq->lock, flags);
4001 }
4002
4003 /* Convert linear signal-to-noise ratio into dB */
4004 static u8 ratio2dB[100] = {
4005 /*       0   1   2   3   4   5   6   7   8   9 */
4006          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4007         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4008         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4009         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4010         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4011         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4012         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4013         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4014         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4015         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4016 };
4017
4018 /* Calculates a relative dB value from a ratio of linear
4019  *   (i.e. not dB) signal levels.
4020  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4021 int iwl3945_calc_db_from_ratio(int sig_ratio)
4022 {
4023         /* 1000:1 or higher just report as 60 dB */
4024         if (sig_ratio >= 1000)
4025                 return 60;
4026
4027         /* 100:1 or higher, divide by 10 and use table,
4028          *   add 20 dB to make up for divide by 10 */
4029         if (sig_ratio >= 100)
4030                 return (20 + (int)ratio2dB[sig_ratio/10]);
4031
4032         /* We shouldn't see this */
4033         if (sig_ratio < 1)
4034                 return 0;
4035
4036         /* Use table for ratios 1:1 - 99:1 */
4037         return (int)ratio2dB[sig_ratio];
4038 }
4039
4040 #define PERFECT_RSSI (-20) /* dBm */
4041 #define WORST_RSSI (-95)   /* dBm */
4042 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4043
4044 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4045  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4046  *   about formulas used below. */
4047 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
4048 {
4049         int sig_qual;
4050         int degradation = PERFECT_RSSI - rssi_dbm;
4051
4052         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4053          * as indicator; formula is (signal dbm - noise dbm).
4054          * SNR at or above 40 is a great signal (100%).
4055          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4056          * Weakest usable signal is usually 10 - 15 dB SNR. */
4057         if (noise_dbm) {
4058                 if (rssi_dbm - noise_dbm >= 40)
4059                         return 100;
4060                 else if (rssi_dbm < noise_dbm)
4061                         return 0;
4062                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4063
4064         /* Else use just the signal level.
4065          * This formula is a least squares fit of data points collected and
4066          *   compared with a reference system that had a percentage (%) display
4067          *   for signal quality. */
4068         } else
4069                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4070                             (15 * RSSI_RANGE + 62 * degradation)) /
4071                            (RSSI_RANGE * RSSI_RANGE);
4072
4073         if (sig_qual > 100)
4074                 sig_qual = 100;
4075         else if (sig_qual < 1)
4076                 sig_qual = 0;
4077
4078         return sig_qual;
4079 }
4080
4081 /**
4082  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
4083  *
4084  * Uses the priv->rx_handlers callback function array to invoke
4085  * the appropriate handlers, including command responses,
4086  * frame-received notifications, and other notifications.
4087  */
4088 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
4089 {
4090         struct iwl3945_rx_mem_buffer *rxb;
4091         struct iwl3945_rx_packet *pkt;
4092         struct iwl3945_rx_queue *rxq = &priv->rxq;
4093         u32 r, i;
4094         int reclaim;
4095         unsigned long flags;
4096         u8 fill_rx = 0;
4097         u32 count = 8;
4098
4099         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4100          * buffer that the driver may process (last buffer filled by ucode). */
4101         r = iwl3945_hw_get_rx_read(priv);
4102         i = rxq->read;
4103
4104         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4105                 fill_rx = 1;
4106         /* Rx interrupt, but nothing sent from uCode */
4107         if (i == r)
4108                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4109
4110         while (i != r) {
4111                 rxb = rxq->queue[i];
4112
4113                 /* If an RXB doesn't have a Rx queue slot associated with it,
4114                  * then a bug has been introduced in the queue refilling
4115                  * routines -- catch it here */
4116                 BUG_ON(rxb == NULL);
4117
4118                 rxq->queue[i] = NULL;
4119
4120                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4121                                             IWL_RX_BUF_SIZE,
4122                                             PCI_DMA_FROMDEVICE);
4123                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4124
4125                 /* Reclaim a command buffer only if this packet is a response
4126                  *   to a (driver-originated) command.
4127                  * If the packet (e.g. Rx frame) originated from uCode,
4128                  *   there is no command buffer to reclaim.
4129                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4130                  *   but apparently a few don't get set; catch them here. */
4131                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4132                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4133                         (pkt->hdr.cmd != REPLY_TX);
4134
4135                 /* Based on type of command response or notification,
4136                  *   handle those that need handling via function in
4137                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4138                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4139                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4140                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4141                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4142                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4143                 } else {
4144                         /* No handling needed */
4145                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4146                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4147                                 r, i, get_cmd_string(pkt->hdr.cmd),
4148                                 pkt->hdr.cmd);
4149                 }
4150
4151                 if (reclaim) {
4152                         /* Invoke any callbacks, transfer the skb to caller, and
4153                          * fire off the (possibly) blocking iwl3945_send_cmd()
4154                          * as we reclaim the driver command queue */
4155                         if (rxb && rxb->skb)
4156                                 iwl3945_tx_cmd_complete(priv, rxb);
4157                         else
4158                                 IWL_WARNING("Claim null rxb?\n");
4159                 }
4160
4161                 /* For now we just don't re-use anything.  We can tweak this
4162                  * later to try and re-use notification packets and SKBs that
4163                  * fail to Rx correctly */
4164                 if (rxb->skb != NULL) {
4165                         priv->alloc_rxb_skb--;
4166                         dev_kfree_skb_any(rxb->skb);
4167                         rxb->skb = NULL;
4168                 }
4169
4170                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4171                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4172                 spin_lock_irqsave(&rxq->lock, flags);
4173                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4174                 spin_unlock_irqrestore(&rxq->lock, flags);
4175                 i = (i + 1) & RX_QUEUE_MASK;
4176                 /* If there are a lot of unused frames,
4177                  * restock the Rx queue so ucode won't assert. */
4178                 if (fill_rx) {
4179                         count++;
4180                         if (count >= 8) {
4181                                 priv->rxq.read = i;
4182                                 __iwl3945_rx_replenish(priv);
4183                                 count = 0;
4184                         }
4185                 }
4186         }
4187
4188         /* Backtrack one entry */
4189         priv->rxq.read = i;
4190         iwl3945_rx_queue_restock(priv);
4191 }
4192
4193 /**
4194  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4195  */
4196 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4197                                   struct iwl3945_tx_queue *txq)
4198 {
4199         u32 reg = 0;
4200         int rc = 0;
4201         int txq_id = txq->q.id;
4202
4203         if (txq->need_update == 0)
4204                 return rc;
4205
4206         /* if we're trying to save power */
4207         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4208                 /* wake up nic if it's powered down ...
4209                  * uCode will wake up, and interrupt us again, so next
4210                  * time we'll skip this part. */
4211                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4212
4213                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4214                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4215                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4216                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4217                         return rc;
4218                 }
4219
4220                 /* restore this queue's parameters in nic hardware. */
4221                 rc = iwl3945_grab_nic_access(priv);
4222                 if (rc)
4223                         return rc;
4224                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4225                                      txq->q.write_ptr | (txq_id << 8));
4226                 iwl3945_release_nic_access(priv);
4227
4228         /* else not in power-save mode, uCode will never sleep when we're
4229          * trying to tx (during RFKILL, we're not trying to tx). */
4230         } else
4231                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4232                             txq->q.write_ptr | (txq_id << 8));
4233
4234         txq->need_update = 0;
4235
4236         return rc;
4237 }
4238
4239 #ifdef CONFIG_IWL3945_DEBUG
4240 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4241 {
4242         DECLARE_MAC_BUF(mac);
4243
4244         IWL_DEBUG_RADIO("RX CONFIG:\n");
4245         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4246         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4247         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4248         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4249                         le32_to_cpu(rxon->filter_flags));
4250         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4251         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4252                         rxon->ofdm_basic_rates);
4253         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4254         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4255                         print_mac(mac, rxon->node_addr));
4256         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4257                         print_mac(mac, rxon->bssid_addr));
4258         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4259 }
4260 #endif
4261
4262 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4263 {
4264         IWL_DEBUG_ISR("Enabling interrupts\n");
4265         set_bit(STATUS_INT_ENABLED, &priv->status);
4266         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4267 }
4268
4269 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4270 {
4271         clear_bit(STATUS_INT_ENABLED, &priv->status);
4272
4273         /* disable interrupts from uCode/NIC to host */
4274         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4275
4276         /* acknowledge/clear/reset any interrupts still pending
4277          * from uCode or flow handler (Rx/Tx DMA) */
4278         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4279         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4280         IWL_DEBUG_ISR("Disabled interrupts\n");
4281 }
4282
4283 static const char *desc_lookup(int i)
4284 {
4285         switch (i) {
4286         case 1:
4287                 return "FAIL";
4288         case 2:
4289                 return "BAD_PARAM";
4290         case 3:
4291                 return "BAD_CHECKSUM";
4292         case 4:
4293                 return "NMI_INTERRUPT";
4294         case 5:
4295                 return "SYSASSERT";
4296         case 6:
4297                 return "FATAL_ERROR";
4298         }
4299
4300         return "UNKNOWN";
4301 }
4302
4303 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4304 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4305
4306 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4307 {
4308         u32 i;
4309         u32 desc, time, count, base, data1;
4310         u32 blink1, blink2, ilink1, ilink2;
4311         int rc;
4312
4313         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4314
4315         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4316                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4317                 return;
4318         }
4319
4320         rc = iwl3945_grab_nic_access(priv);
4321         if (rc) {
4322                 IWL_WARNING("Can not read from adapter at this time.\n");
4323                 return;
4324         }
4325
4326         count = iwl3945_read_targ_mem(priv, base);
4327
4328         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4329                 IWL_ERROR("Start IWL Error Log Dump:\n");
4330                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4331         }
4332
4333         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4334                   "ilink1  nmiPC   Line\n");
4335         for (i = ERROR_START_OFFSET;
4336              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4337              i += ERROR_ELEM_SIZE) {
4338                 desc = iwl3945_read_targ_mem(priv, base + i);
4339                 time =
4340                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4341                 blink1 =
4342                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4343                 blink2 =
4344                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4345                 ilink1 =
4346                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4347                 ilink2 =
4348                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4349                 data1 =
4350                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4351
4352                 IWL_ERROR
4353                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4354                      desc_lookup(desc), desc, time, blink1, blink2,
4355                      ilink1, ilink2, data1);
4356         }
4357
4358         iwl3945_release_nic_access(priv);
4359
4360 }
4361
4362 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4363
4364 /**
4365  * iwl3945_print_event_log - Dump error event log to syslog
4366  *
4367  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4368  */
4369 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4370                                 u32 num_events, u32 mode)
4371 {
4372         u32 i;
4373         u32 base;       /* SRAM byte address of event log header */
4374         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4375         u32 ptr;        /* SRAM byte address of log data */
4376         u32 ev, time, data; /* event log data */
4377
4378         if (num_events == 0)
4379                 return;
4380
4381         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4382
4383         if (mode == 0)
4384                 event_size = 2 * sizeof(u32);
4385         else
4386                 event_size = 3 * sizeof(u32);
4387
4388         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4389
4390         /* "time" is actually "data" for mode 0 (no timestamp).
4391          * place event id # at far right for easier visual parsing. */
4392         for (i = 0; i < num_events; i++) {
4393                 ev = iwl3945_read_targ_mem(priv, ptr);
4394                 ptr += sizeof(u32);
4395                 time = iwl3945_read_targ_mem(priv, ptr);
4396                 ptr += sizeof(u32);
4397                 if (mode == 0)
4398                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4399                 else {
4400                         data = iwl3945_read_targ_mem(priv, ptr);
4401                         ptr += sizeof(u32);
4402                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4403                 }
4404         }
4405 }
4406
4407 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4408 {
4409         int rc;
4410         u32 base;       /* SRAM byte address of event log header */
4411         u32 capacity;   /* event log capacity in # entries */
4412         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4413         u32 num_wraps;  /* # times uCode wrapped to top of log */
4414         u32 next_entry; /* index of next entry to be written by uCode */
4415         u32 size;       /* # entries that we'll print */
4416
4417         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4418         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4419                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4420                 return;
4421         }
4422
4423         rc = iwl3945_grab_nic_access(priv);
4424         if (rc) {
4425                 IWL_WARNING("Can not read from adapter at this time.\n");
4426                 return;
4427         }
4428
4429         /* event log header */
4430         capacity = iwl3945_read_targ_mem(priv, base);
4431         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4432         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4433         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4434
4435         size = num_wraps ? capacity : next_entry;
4436
4437         /* bail out if nothing in log */
4438         if (size == 0) {
4439                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4440                 iwl3945_release_nic_access(priv);
4441                 return;
4442         }
4443
4444         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4445                   size, num_wraps);
4446
4447         /* if uCode has wrapped back to top of log, start at the oldest entry,
4448          * i.e the next one that uCode would fill. */
4449         if (num_wraps)
4450                 iwl3945_print_event_log(priv, next_entry,
4451                                     capacity - next_entry, mode);
4452
4453         /* (then/else) start at top of log */
4454         iwl3945_print_event_log(priv, 0, next_entry, mode);
4455
4456         iwl3945_release_nic_access(priv);
4457 }
4458
4459 /**
4460  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4461  */
4462 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4463 {
4464         /* Set the FW error flag -- cleared on iwl3945_down */
4465         set_bit(STATUS_FW_ERROR, &priv->status);
4466
4467         /* Cancel currently queued command. */
4468         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4469
4470 #ifdef CONFIG_IWL3945_DEBUG
4471         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4472                 iwl3945_dump_nic_error_log(priv);
4473                 iwl3945_dump_nic_event_log(priv);
4474                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4475         }
4476 #endif
4477
4478         wake_up_interruptible(&priv->wait_command_queue);
4479
4480         /* Keep the restart process from trying to send host
4481          * commands by clearing the INIT status bit */
4482         clear_bit(STATUS_READY, &priv->status);
4483
4484         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4485                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4486                           "Restarting adapter due to uCode error.\n");
4487
4488                 if (iwl3945_is_associated(priv)) {
4489                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4490                                sizeof(priv->recovery_rxon));
4491                         priv->error_recovering = 1;
4492                 }
4493                 queue_work(priv->workqueue, &priv->restart);
4494         }
4495 }
4496
4497 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4498 {
4499         unsigned long flags;
4500
4501         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4502                sizeof(priv->staging_rxon));
4503         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4504         iwl3945_commit_rxon(priv);
4505
4506         iwl3945_add_station(priv, priv->bssid, 1, 0);
4507
4508         spin_lock_irqsave(&priv->lock, flags);
4509         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4510         priv->error_recovering = 0;
4511         spin_unlock_irqrestore(&priv->lock, flags);
4512 }
4513
4514 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4515 {
4516         u32 inta, handled = 0;
4517         u32 inta_fh;
4518         unsigned long flags;
4519 #ifdef CONFIG_IWL3945_DEBUG
4520         u32 inta_mask;
4521 #endif
4522
4523         spin_lock_irqsave(&priv->lock, flags);
4524
4525         /* Ack/clear/reset pending uCode interrupts.
4526          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4527          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4528         inta = iwl3945_read32(priv, CSR_INT);
4529         iwl3945_write32(priv, CSR_INT, inta);
4530
4531         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4532          * Any new interrupts that happen after this, either while we're
4533          * in this tasklet, or later, will show up in next ISR/tasklet. */
4534         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4535         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4536
4537 #ifdef CONFIG_IWL3945_DEBUG
4538         if (iwl3945_debug_level & IWL_DL_ISR) {
4539                 /* just for debug */
4540                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4541                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4542                               inta, inta_mask, inta_fh);
4543         }
4544 #endif
4545
4546         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4547          * atomic, make sure that inta covers all the interrupts that
4548          * we've discovered, even if FH interrupt came in just after
4549          * reading CSR_INT. */
4550         if (inta_fh & CSR39_FH_INT_RX_MASK)
4551                 inta |= CSR_INT_BIT_FH_RX;
4552         if (inta_fh & CSR39_FH_INT_TX_MASK)
4553                 inta |= CSR_INT_BIT_FH_TX;
4554
4555         /* Now service all interrupt bits discovered above. */
4556         if (inta & CSR_INT_BIT_HW_ERR) {
4557                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4558
4559                 /* Tell the device to stop sending interrupts */
4560                 iwl3945_disable_interrupts(priv);
4561
4562                 iwl3945_irq_handle_error(priv);
4563
4564                 handled |= CSR_INT_BIT_HW_ERR;
4565
4566                 spin_unlock_irqrestore(&priv->lock, flags);
4567
4568                 return;
4569         }
4570
4571 #ifdef CONFIG_IWL3945_DEBUG
4572         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4573                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4574                 if (inta & CSR_INT_BIT_SCD)
4575                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4576                                       "the frame/frames.\n");
4577
4578                 /* Alive notification via Rx interrupt will do the real work */
4579                 if (inta & CSR_INT_BIT_ALIVE)
4580                         IWL_DEBUG_ISR("Alive interrupt\n");
4581         }
4582 #endif
4583         /* Safely ignore these bits for debug checks below */
4584         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4585
4586         /* HW RF KILL switch toggled (4965 only) */
4587         if (inta & CSR_INT_BIT_RF_KILL) {
4588                 int hw_rf_kill = 0;
4589                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4590                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4591                         hw_rf_kill = 1;
4592
4593                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4594                                 "RF_KILL bit toggled to %s.\n",
4595                                 hw_rf_kill ? "disable radio":"enable radio");
4596
4597                 /* Queue restart only if RF_KILL switch was set to "kill"
4598                  *   when we loaded driver, and is now set to "enable".
4599                  * After we're Alive, RF_KILL gets handled by
4600                  *   iwl3945_rx_card_state_notif() */
4601                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4602                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4603                         queue_work(priv->workqueue, &priv->restart);
4604                 }
4605
4606                 handled |= CSR_INT_BIT_RF_KILL;
4607         }
4608
4609         /* Chip got too hot and stopped itself (4965 only) */
4610         if (inta & CSR_INT_BIT_CT_KILL) {
4611                 IWL_ERROR("Microcode CT kill error detected.\n");
4612                 handled |= CSR_INT_BIT_CT_KILL;
4613         }
4614
4615         /* Error detected by uCode */
4616         if (inta & CSR_INT_BIT_SW_ERR) {
4617                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4618                           inta);
4619                 iwl3945_irq_handle_error(priv);
4620                 handled |= CSR_INT_BIT_SW_ERR;
4621         }
4622
4623         /* uCode wakes up after power-down sleep */
4624         if (inta & CSR_INT_BIT_WAKEUP) {
4625                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4626                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4627                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4628                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4629                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4630                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4631                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4632                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4633
4634                 handled |= CSR_INT_BIT_WAKEUP;
4635         }
4636
4637         /* All uCode command responses, including Tx command responses,
4638          * Rx "responses" (frame-received notification), and other
4639          * notifications from uCode come through here*/
4640         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4641                 iwl3945_rx_handle(priv);
4642                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4643         }
4644
4645         if (inta & CSR_INT_BIT_FH_TX) {
4646                 IWL_DEBUG_ISR("Tx interrupt\n");
4647
4648                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4649                 if (!iwl3945_grab_nic_access(priv)) {
4650                         iwl3945_write_direct32(priv,
4651                                              FH_TCSR_CREDIT
4652                                              (ALM_FH_SRVC_CHNL), 0x0);
4653                         iwl3945_release_nic_access(priv);
4654                 }
4655                 handled |= CSR_INT_BIT_FH_TX;
4656         }
4657
4658         if (inta & ~handled)
4659                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4660
4661         if (inta & ~CSR_INI_SET_MASK) {
4662                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4663                          inta & ~CSR_INI_SET_MASK);
4664                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4665         }
4666
4667         /* Re-enable all interrupts */
4668         iwl3945_enable_interrupts(priv);
4669
4670 #ifdef CONFIG_IWL3945_DEBUG
4671         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4672                 inta = iwl3945_read32(priv, CSR_INT);
4673                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4674                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4675                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4676                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4677         }
4678 #endif
4679         spin_unlock_irqrestore(&priv->lock, flags);
4680 }
4681
4682 static irqreturn_t iwl3945_isr(int irq, void *data)
4683 {
4684         struct iwl3945_priv *priv = data;
4685         u32 inta, inta_mask;
4686         u32 inta_fh;
4687         if (!priv)
4688                 return IRQ_NONE;
4689
4690         spin_lock(&priv->lock);
4691
4692         /* Disable (but don't clear!) interrupts here to avoid
4693          *    back-to-back ISRs and sporadic interrupts from our NIC.
4694          * If we have something to service, the tasklet will re-enable ints.
4695          * If we *don't* have something, we'll re-enable before leaving here. */
4696         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4697         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4698
4699         /* Discover which interrupts are active/pending */
4700         inta = iwl3945_read32(priv, CSR_INT);
4701         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4702
4703         /* Ignore interrupt if there's nothing in NIC to service.
4704          * This may be due to IRQ shared with another device,
4705          * or due to sporadic interrupts thrown from our NIC. */
4706         if (!inta && !inta_fh) {
4707                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4708                 goto none;
4709         }
4710
4711         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4712                 /* Hardware disappeared */
4713                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4714                 goto unplugged;
4715         }
4716
4717         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4718                       inta, inta_mask, inta_fh);
4719
4720         inta &= ~CSR_INT_BIT_SCD;
4721
4722         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4723         if (likely(inta || inta_fh))
4724                 tasklet_schedule(&priv->irq_tasklet);
4725 unplugged:
4726         spin_unlock(&priv->lock);
4727
4728         return IRQ_HANDLED;
4729
4730  none:
4731         /* re-enable interrupts here since we don't have anything to service. */
4732         iwl3945_enable_interrupts(priv);
4733         spin_unlock(&priv->lock);
4734         return IRQ_NONE;
4735 }
4736
4737 /************************** EEPROM BANDS ****************************
4738  *
4739  * The iwl3945_eeprom_band definitions below provide the mapping from the
4740  * EEPROM contents to the specific channel number supported for each
4741  * band.
4742  *
4743  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4744  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4745  * The specific geography and calibration information for that channel
4746  * is contained in the eeprom map itself.
4747  *
4748  * During init, we copy the eeprom information and channel map
4749  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4750  *
4751  * channel_map_24/52 provides the index in the channel_info array for a
4752  * given channel.  We have to have two separate maps as there is channel
4753  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4754  * band_2
4755  *
4756  * A value of 0xff stored in the channel_map indicates that the channel
4757  * is not supported by the hardware at all.
4758  *
4759  * A value of 0xfe in the channel_map indicates that the channel is not
4760  * valid for Tx with the current hardware.  This means that
4761  * while the system can tune and receive on a given channel, it may not
4762  * be able to associate or transmit any frames on that
4763  * channel.  There is no corresponding channel information for that
4764  * entry.
4765  *
4766  *********************************************************************/
4767
4768 /* 2.4 GHz */
4769 static const u8 iwl3945_eeprom_band_1[14] = {
4770         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4771 };
4772
4773 /* 5.2 GHz bands */
4774 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4775         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4776 };
4777
4778 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4779         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4780 };
4781
4782 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4783         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4784 };
4785
4786 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4787         145, 149, 153, 157, 161, 165
4788 };
4789
4790 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4791                                     int *eeprom_ch_count,
4792                                     const struct iwl3945_eeprom_channel
4793                                     **eeprom_ch_info,
4794                                     const u8 **eeprom_ch_index)
4795 {
4796         switch (band) {
4797         case 1:         /* 2.4GHz band */
4798                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4799                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4800                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4801                 break;
4802         case 2:         /* 4.9GHz band */
4803                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4804                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4805                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4806                 break;
4807         case 3:         /* 5.2GHz band */
4808                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4809                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4810                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4811                 break;
4812         case 4:         /* 5.5GHz band */
4813                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4814                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4815                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4816                 break;
4817         case 5:         /* 5.7GHz band */
4818                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4819                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4820                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4821                 break;
4822         default:
4823                 BUG();
4824                 return;
4825         }
4826 }
4827
4828 /**
4829  * iwl3945_get_channel_info - Find driver's private channel info
4830  *
4831  * Based on band and channel number.
4832  */
4833 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4834                                                     enum ieee80211_band band, u16 channel)
4835 {
4836         int i;
4837
4838         switch (band) {
4839         case IEEE80211_BAND_5GHZ:
4840                 for (i = 14; i < priv->channel_count; i++) {
4841                         if (priv->channel_info[i].channel == channel)
4842                                 return &priv->channel_info[i];
4843                 }
4844                 break;
4845
4846         case IEEE80211_BAND_2GHZ:
4847                 if (channel >= 1 && channel <= 14)
4848                         return &priv->channel_info[channel - 1];
4849                 break;
4850         case IEEE80211_NUM_BANDS:
4851                 WARN_ON(1);
4852         }
4853
4854         return NULL;
4855 }
4856
4857 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4858                             ? # x " " : "")
4859
4860 /**
4861  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4862  */
4863 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4864 {
4865         int eeprom_ch_count = 0;
4866         const u8 *eeprom_ch_index = NULL;
4867         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4868         int band, ch;
4869         struct iwl3945_channel_info *ch_info;
4870
4871         if (priv->channel_count) {
4872                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4873                 return 0;
4874         }
4875
4876         if (priv->eeprom.version < 0x2f) {
4877                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4878                             priv->eeprom.version);
4879                 return -EINVAL;
4880         }
4881
4882         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4883
4884         priv->channel_count =
4885             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4886             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4887             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4888             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4889             ARRAY_SIZE(iwl3945_eeprom_band_5);
4890
4891         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4892
4893         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4894                                      priv->channel_count, GFP_KERNEL);
4895         if (!priv->channel_info) {
4896                 IWL_ERROR("Could not allocate channel_info\n");
4897                 priv->channel_count = 0;
4898                 return -ENOMEM;
4899         }
4900
4901         ch_info = priv->channel_info;
4902
4903         /* Loop through the 5 EEPROM bands adding them in order to the
4904          * channel map we maintain (that contains additional information than
4905          * what just in the EEPROM) */
4906         for (band = 1; band <= 5; band++) {
4907
4908                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4909                                         &eeprom_ch_info, &eeprom_ch_index);
4910
4911                 /* Loop through each band adding each of the channels */
4912                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4913                         ch_info->channel = eeprom_ch_index[ch];
4914                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4915                             IEEE80211_BAND_5GHZ;
4916
4917                         /* permanently store EEPROM's channel regulatory flags
4918                          *   and max power in channel info database. */
4919                         ch_info->eeprom = eeprom_ch_info[ch];
4920
4921                         /* Copy the run-time flags so they are there even on
4922                          * invalid channels */
4923                         ch_info->flags = eeprom_ch_info[ch].flags;
4924
4925                         if (!(is_channel_valid(ch_info))) {
4926                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4927                                                "No traffic\n",
4928                                                ch_info->channel,
4929                                                ch_info->flags,
4930                                                is_channel_a_band(ch_info) ?
4931                                                "5.2" : "2.4");
4932                                 ch_info++;
4933                                 continue;
4934                         }
4935
4936                         /* Initialize regulatory-based run-time data */
4937                         ch_info->max_power_avg = ch_info->curr_txpow =
4938                             eeprom_ch_info[ch].max_power_avg;
4939                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4940                         ch_info->min_power = 0;
4941
4942                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s%s(0x%02x"
4943                                        " %ddBm): Ad-Hoc %ssupported\n",
4944                                        ch_info->channel,
4945                                        is_channel_a_band(ch_info) ?
4946                                        "5.2" : "2.4",
4947                                        CHECK_AND_PRINT(VALID),
4948                                        CHECK_AND_PRINT(IBSS),
4949                                        CHECK_AND_PRINT(ACTIVE),
4950                                        CHECK_AND_PRINT(RADAR),
4951                                        CHECK_AND_PRINT(WIDE),
4952                                        CHECK_AND_PRINT(NARROW),
4953                                        CHECK_AND_PRINT(DFS),
4954                                        eeprom_ch_info[ch].flags,
4955                                        eeprom_ch_info[ch].max_power_avg,
4956                                        ((eeprom_ch_info[ch].
4957                                          flags & EEPROM_CHANNEL_IBSS)
4958                                         && !(eeprom_ch_info[ch].
4959                                              flags & EEPROM_CHANNEL_RADAR))
4960                                        ? "" : "not ");
4961
4962                         /* Set the user_txpower_limit to the highest power
4963                          * supported by any channel */
4964                         if (eeprom_ch_info[ch].max_power_avg >
4965                             priv->user_txpower_limit)
4966                                 priv->user_txpower_limit =
4967                                     eeprom_ch_info[ch].max_power_avg;
4968
4969                         ch_info++;
4970                 }
4971         }
4972
4973         /* Set up txpower settings in driver for all channels */
4974         if (iwl3945_txpower_set_from_eeprom(priv))
4975                 return -EIO;
4976
4977         return 0;
4978 }
4979
4980 /*
4981  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4982  */
4983 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4984 {
4985         kfree(priv->channel_info);
4986         priv->channel_count = 0;
4987 }
4988
4989 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4990  * sending probe req.  This should be set long enough to hear probe responses
4991  * from more than one AP.  */
4992 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4993 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4994
4995 /* For faster active scanning, scan will move to the next channel if fewer than
4996  * PLCP_QUIET_THRESH packets are heard on this channel within
4997  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4998  * time if it's a quiet channel (nothing responded to our probe, and there's
4999  * no other traffic).
5000  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5001 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5002 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5003
5004 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5005  * Must be set longer than active dwell time.
5006  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5007 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5008 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5009 #define IWL_PASSIVE_DWELL_BASE      (100)
5010 #define IWL_CHANNEL_TUNE_TIME       5
5011
5012 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
5013                                                 enum ieee80211_band band)
5014 {
5015         if (band == IEEE80211_BAND_5GHZ)
5016                 return IWL_ACTIVE_DWELL_TIME_52;
5017         else
5018                 return IWL_ACTIVE_DWELL_TIME_24;
5019 }
5020
5021 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
5022                                           enum ieee80211_band band)
5023 {
5024         u16 active = iwl3945_get_active_dwell_time(priv, band);
5025         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
5026             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5027             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5028
5029         if (iwl3945_is_associated(priv)) {
5030                 /* If we're associated, we clamp the maximum passive
5031                  * dwell time to be 98% of the beacon interval (minus
5032                  * 2 * channel tune time) */
5033                 passive = priv->beacon_int;
5034                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5035                         passive = IWL_PASSIVE_DWELL_BASE;
5036                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5037         }
5038
5039         if (passive <= active)
5040                 passive = active + 1;
5041
5042         return passive;
5043 }
5044
5045 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
5046                                          enum ieee80211_band band,
5047                                      u8 is_active, u8 direct_mask,
5048                                      struct iwl3945_scan_channel *scan_ch)
5049 {
5050         const struct ieee80211_channel *channels = NULL;
5051         const struct ieee80211_supported_band *sband;
5052         const struct iwl3945_channel_info *ch_info;
5053         u16 passive_dwell = 0;
5054         u16 active_dwell = 0;
5055         int added, i;
5056
5057         sband = iwl3945_get_band(priv, band);
5058         if (!sband)
5059                 return 0;
5060
5061         channels = sband->channels;
5062
5063         active_dwell = iwl3945_get_active_dwell_time(priv, band);
5064         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
5065
5066         for (i = 0, added = 0; i < sband->n_channels; i++) {
5067                 if (channels[i].hw_value ==
5068                     le16_to_cpu(priv->active_rxon.channel)) {
5069                         if (iwl3945_is_associated(priv)) {
5070                                 IWL_DEBUG_SCAN
5071                                     ("Skipping current channel %d\n",
5072                                      le16_to_cpu(priv->active_rxon.channel));
5073                                 continue;
5074                         }
5075                 } else if (priv->only_active_channel)
5076                         continue;
5077
5078                 scan_ch->channel = channels[i].hw_value;
5079
5080                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
5081                 if (!is_channel_valid(ch_info)) {
5082                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5083                                        scan_ch->channel);
5084                         continue;
5085                 }
5086
5087                 if (!is_active || is_channel_passive(ch_info) ||
5088                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
5089                         scan_ch->type = 0;      /* passive */
5090                 else
5091                         scan_ch->type = 1;      /* active */
5092
5093                 if (scan_ch->type & 1)
5094                         scan_ch->type |= (direct_mask << 1);
5095
5096                 if (is_channel_narrow(ch_info))
5097                         scan_ch->type |= (1 << 7);
5098
5099                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5100                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5101
5102                 /* Set txpower levels to defaults */
5103                 scan_ch->tpc.dsp_atten = 110;
5104                 /* scan_pwr_info->tpc.dsp_atten; */
5105
5106                 /*scan_pwr_info->tpc.tx_gain; */
5107                 if (band == IEEE80211_BAND_5GHZ)
5108                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5109                 else {
5110                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5111                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5112                          * power level:
5113                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5114                          */
5115                 }
5116
5117                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5118                                scan_ch->channel,
5119                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5120                                (scan_ch->type & 1) ?
5121                                active_dwell : passive_dwell);
5122
5123                 scan_ch++;
5124                 added++;
5125         }
5126
5127         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5128         return added;
5129 }
5130
5131 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5132                               struct ieee80211_rate *rates)
5133 {
5134         int i;
5135
5136         for (i = 0; i < IWL_RATE_COUNT; i++) {
5137                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
5138                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5139                 rates[i].hw_value_short = i;
5140                 rates[i].flags = 0;
5141                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5142                         /*
5143                          * If CCK != 1M then set short preamble rate flag.
5144                          */
5145                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5146                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5147                 }
5148         }
5149 }
5150
5151 /**
5152  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5153  */
5154 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5155 {
5156         struct iwl3945_channel_info *ch;
5157         struct ieee80211_supported_band *sband;
5158         struct ieee80211_channel *channels;
5159         struct ieee80211_channel *geo_ch;
5160         struct ieee80211_rate *rates;
5161         int i = 0;
5162
5163         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5164             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5165                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5166                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5167                 return 0;
5168         }
5169
5170         channels = kzalloc(sizeof(struct ieee80211_channel) *
5171                            priv->channel_count, GFP_KERNEL);
5172         if (!channels)
5173                 return -ENOMEM;
5174
5175         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5176                         GFP_KERNEL);
5177         if (!rates) {
5178                 kfree(channels);
5179                 return -ENOMEM;
5180         }
5181
5182         /* 5.2GHz channels start after the 2.4GHz channels */
5183         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5184         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5185         /* just OFDM */
5186         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5187         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5188
5189         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5190         sband->channels = channels;
5191         /* OFDM & CCK */
5192         sband->bitrates = rates;
5193         sband->n_bitrates = IWL_RATE_COUNT;
5194
5195         priv->ieee_channels = channels;
5196         priv->ieee_rates = rates;
5197
5198         iwl3945_init_hw_rates(priv, rates);
5199
5200         for (i = 0;  i < priv->channel_count; i++) {
5201                 ch = &priv->channel_info[i];
5202
5203                 /* FIXME: might be removed if scan is OK*/
5204                 if (!is_channel_valid(ch))
5205                         continue;
5206
5207                 if (is_channel_a_band(ch))
5208                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5209                 else
5210                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5211
5212                 geo_ch = &sband->channels[sband->n_channels++];
5213
5214                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5215                 geo_ch->max_power = ch->max_power_avg;
5216                 geo_ch->max_antenna_gain = 0xff;
5217                 geo_ch->hw_value = ch->channel;
5218
5219                 if (is_channel_valid(ch)) {
5220                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5221                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5222
5223                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5224                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5225
5226                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5227                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5228
5229                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5230                                 priv->max_channel_txpower_limit =
5231                                     ch->max_power_avg;
5232                 } else {
5233                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5234                 }
5235
5236                 /* Save flags for reg domain usage */
5237                 geo_ch->orig_flags = geo_ch->flags;
5238
5239                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5240                                 ch->channel, geo_ch->center_freq,
5241                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5242                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5243                                 "restricted" : "valid",
5244                                  geo_ch->flags);
5245         }
5246
5247         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5248              priv->cfg->sku & IWL_SKU_A) {
5249                 printk(KERN_INFO DRV_NAME
5250                        ": Incorrectly detected BG card as ABG.  Please send "
5251                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5252                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5253                  priv->cfg->sku &= ~IWL_SKU_A;
5254         }
5255
5256         printk(KERN_INFO DRV_NAME
5257                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5258                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5259                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5260
5261         priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ];
5262         priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ];
5263
5264         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5265
5266         return 0;
5267 }
5268
5269 /*
5270  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5271  */
5272 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5273 {
5274         kfree(priv->ieee_channels);
5275         kfree(priv->ieee_rates);
5276         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5277 }
5278
5279 /******************************************************************************
5280  *
5281  * uCode download functions
5282  *
5283  ******************************************************************************/
5284
5285 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5286 {
5287         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5288         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5289         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5290         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5291         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5292         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5293 }
5294
5295 /**
5296  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5297  *     looking at all data.
5298  */
5299 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5300 {
5301         u32 val;
5302         u32 save_len = len;
5303         int rc = 0;
5304         u32 errcnt;
5305
5306         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5307
5308         rc = iwl3945_grab_nic_access(priv);
5309         if (rc)
5310                 return rc;
5311
5312         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5313
5314         errcnt = 0;
5315         for (; len > 0; len -= sizeof(u32), image++) {
5316                 /* read data comes through single port, auto-incr addr */
5317                 /* NOTE: Use the debugless read so we don't flood kernel log
5318                  * if IWL_DL_IO is set */
5319                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5320                 if (val != le32_to_cpu(*image)) {
5321                         IWL_ERROR("uCode INST section is invalid at "
5322                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5323                                   save_len - len, val, le32_to_cpu(*image));
5324                         rc = -EIO;
5325                         errcnt++;
5326                         if (errcnt >= 20)
5327                                 break;
5328                 }
5329         }
5330
5331         iwl3945_release_nic_access(priv);
5332
5333         if (!errcnt)
5334                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5335
5336         return rc;
5337 }
5338
5339
5340 /**
5341  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5342  *   using sample data 100 bytes apart.  If these sample points are good,
5343  *   it's a pretty good bet that everything between them is good, too.
5344  */
5345 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5346 {
5347         u32 val;
5348         int rc = 0;
5349         u32 errcnt = 0;
5350         u32 i;
5351
5352         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5353
5354         rc = iwl3945_grab_nic_access(priv);
5355         if (rc)
5356                 return rc;
5357
5358         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5359                 /* read data comes through single port, auto-incr addr */
5360                 /* NOTE: Use the debugless read so we don't flood kernel log
5361                  * if IWL_DL_IO is set */
5362                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5363                         i + RTC_INST_LOWER_BOUND);
5364                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5365                 if (val != le32_to_cpu(*image)) {
5366 #if 0 /* Enable this if you want to see details */
5367                         IWL_ERROR("uCode INST section is invalid at "
5368                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5369                                   i, val, *image);
5370 #endif
5371                         rc = -EIO;
5372                         errcnt++;
5373                         if (errcnt >= 3)
5374                                 break;
5375                 }
5376         }
5377
5378         iwl3945_release_nic_access(priv);
5379
5380         return rc;
5381 }
5382
5383
5384 /**
5385  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5386  *    and verify its contents
5387  */
5388 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5389 {
5390         __le32 *image;
5391         u32 len;
5392         int rc = 0;
5393
5394         /* Try bootstrap */
5395         image = (__le32 *)priv->ucode_boot.v_addr;
5396         len = priv->ucode_boot.len;
5397         rc = iwl3945_verify_inst_sparse(priv, image, len);
5398         if (rc == 0) {
5399                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5400                 return 0;
5401         }
5402
5403         /* Try initialize */
5404         image = (__le32 *)priv->ucode_init.v_addr;
5405         len = priv->ucode_init.len;
5406         rc = iwl3945_verify_inst_sparse(priv, image, len);
5407         if (rc == 0) {
5408                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5409                 return 0;
5410         }
5411
5412         /* Try runtime/protocol */
5413         image = (__le32 *)priv->ucode_code.v_addr;
5414         len = priv->ucode_code.len;
5415         rc = iwl3945_verify_inst_sparse(priv, image, len);
5416         if (rc == 0) {
5417                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5418                 return 0;
5419         }
5420
5421         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5422
5423         /* Since nothing seems to match, show first several data entries in
5424          * instruction SRAM, so maybe visual inspection will give a clue.
5425          * Selection of bootstrap image (vs. other images) is arbitrary. */
5426         image = (__le32 *)priv->ucode_boot.v_addr;
5427         len = priv->ucode_boot.len;
5428         rc = iwl3945_verify_inst_full(priv, image, len);
5429
5430         return rc;
5431 }
5432
5433
5434 /* check contents of special bootstrap uCode SRAM */
5435 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5436 {
5437         __le32 *image = priv->ucode_boot.v_addr;
5438         u32 len = priv->ucode_boot.len;
5439         u32 reg;
5440         u32 val;
5441
5442         IWL_DEBUG_INFO("Begin verify bsm\n");
5443
5444         /* verify BSM SRAM contents */
5445         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5446         for (reg = BSM_SRAM_LOWER_BOUND;
5447              reg < BSM_SRAM_LOWER_BOUND + len;
5448              reg += sizeof(u32), image ++) {
5449                 val = iwl3945_read_prph(priv, reg);
5450                 if (val != le32_to_cpu(*image)) {
5451                         IWL_ERROR("BSM uCode verification failed at "
5452                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5453                                   BSM_SRAM_LOWER_BOUND,
5454                                   reg - BSM_SRAM_LOWER_BOUND, len,
5455                                   val, le32_to_cpu(*image));
5456                         return -EIO;
5457                 }
5458         }
5459
5460         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5461
5462         return 0;
5463 }
5464
5465 /**
5466  * iwl3945_load_bsm - Load bootstrap instructions
5467  *
5468  * BSM operation:
5469  *
5470  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5471  * in special SRAM that does not power down during RFKILL.  When powering back
5472  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5473  * the bootstrap program into the on-board processor, and starts it.
5474  *
5475  * The bootstrap program loads (via DMA) instructions and data for a new
5476  * program from host DRAM locations indicated by the host driver in the
5477  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5478  * automatically.
5479  *
5480  * When initializing the NIC, the host driver points the BSM to the
5481  * "initialize" uCode image.  This uCode sets up some internal data, then
5482  * notifies host via "initialize alive" that it is complete.
5483  *
5484  * The host then replaces the BSM_DRAM_* pointer values to point to the
5485  * normal runtime uCode instructions and a backup uCode data cache buffer
5486  * (filled initially with starting data values for the on-board processor),
5487  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5488  * which begins normal operation.
5489  *
5490  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5491  * the backup data cache in DRAM before SRAM is powered down.
5492  *
5493  * When powering back up, the BSM loads the bootstrap program.  This reloads
5494  * the runtime uCode instructions and the backup data cache into SRAM,
5495  * and re-launches the runtime uCode from where it left off.
5496  */
5497 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5498 {
5499         __le32 *image = priv->ucode_boot.v_addr;
5500         u32 len = priv->ucode_boot.len;
5501         dma_addr_t pinst;
5502         dma_addr_t pdata;
5503         u32 inst_len;
5504         u32 data_len;
5505         int rc;
5506         int i;
5507         u32 done;
5508         u32 reg_offset;
5509
5510         IWL_DEBUG_INFO("Begin load bsm\n");
5511
5512         /* make sure bootstrap program is no larger than BSM's SRAM size */
5513         if (len > IWL_MAX_BSM_SIZE)
5514                 return -EINVAL;
5515
5516         /* Tell bootstrap uCode where to find the "Initialize" uCode
5517          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5518          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5519          *        after the "initialize" uCode has run, to point to
5520          *        runtime/protocol instructions and backup data cache. */
5521         pinst = priv->ucode_init.p_addr;
5522         pdata = priv->ucode_init_data.p_addr;
5523         inst_len = priv->ucode_init.len;
5524         data_len = priv->ucode_init_data.len;
5525
5526         rc = iwl3945_grab_nic_access(priv);
5527         if (rc)
5528                 return rc;
5529
5530         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5531         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5532         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5533         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5534
5535         /* Fill BSM memory with bootstrap instructions */
5536         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5537              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5538              reg_offset += sizeof(u32), image++)
5539                 _iwl3945_write_prph(priv, reg_offset,
5540                                           le32_to_cpu(*image));
5541
5542         rc = iwl3945_verify_bsm(priv);
5543         if (rc) {
5544                 iwl3945_release_nic_access(priv);
5545                 return rc;
5546         }
5547
5548         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5549         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5550         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5551                                  RTC_INST_LOWER_BOUND);
5552         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5553
5554         /* Load bootstrap code into instruction SRAM now,
5555          *   to prepare to load "initialize" uCode */
5556         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5557                 BSM_WR_CTRL_REG_BIT_START);
5558
5559         /* Wait for load of bootstrap uCode to finish */
5560         for (i = 0; i < 100; i++) {
5561                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5562                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5563                         break;
5564                 udelay(10);
5565         }
5566         if (i < 100)
5567                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5568         else {
5569                 IWL_ERROR("BSM write did not complete!\n");
5570                 return -EIO;
5571         }
5572
5573         /* Enable future boot loads whenever power management unit triggers it
5574          *   (e.g. when powering back up after power-save shutdown) */
5575         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5576                 BSM_WR_CTRL_REG_BIT_START_EN);
5577
5578         iwl3945_release_nic_access(priv);
5579
5580         return 0;
5581 }
5582
5583 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5584 {
5585         /* Remove all resets to allow NIC to operate */
5586         iwl3945_write32(priv, CSR_RESET, 0);
5587 }
5588
5589 /**
5590  * iwl3945_read_ucode - Read uCode images from disk file.
5591  *
5592  * Copy into buffers for card to fetch via bus-mastering
5593  */
5594 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5595 {
5596         struct iwl3945_ucode *ucode;
5597         int ret = 0;
5598         const struct firmware *ucode_raw;
5599         /* firmware file name contains uCode/driver compatibility version */
5600         const char *name = priv->cfg->fw_name;
5601         u8 *src;
5602         size_t len;
5603         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5604
5605         /* Ask kernel firmware_class module to get the boot firmware off disk.
5606          * request_firmware() is synchronous, file is in memory on return. */
5607         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5608         if (ret < 0) {
5609                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5610                                 name, ret);
5611                 goto error;
5612         }
5613
5614         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5615                        name, ucode_raw->size);
5616
5617         /* Make sure that we got at least our header! */
5618         if (ucode_raw->size < sizeof(*ucode)) {
5619                 IWL_ERROR("File size way too small!\n");
5620                 ret = -EINVAL;
5621                 goto err_release;
5622         }
5623
5624         /* Data from ucode file:  header followed by uCode images */
5625         ucode = (void *)ucode_raw->data;
5626
5627         ver = le32_to_cpu(ucode->ver);
5628         inst_size = le32_to_cpu(ucode->inst_size);
5629         data_size = le32_to_cpu(ucode->data_size);
5630         init_size = le32_to_cpu(ucode->init_size);
5631         init_data_size = le32_to_cpu(ucode->init_data_size);
5632         boot_size = le32_to_cpu(ucode->boot_size);
5633
5634         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5635         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5636         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5637         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5638         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5639         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5640
5641         /* Verify size of file vs. image size info in file's header */
5642         if (ucode_raw->size < sizeof(*ucode) +
5643                 inst_size + data_size + init_size +
5644                 init_data_size + boot_size) {
5645
5646                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5647                                (int)ucode_raw->size);
5648                 ret = -EINVAL;
5649                 goto err_release;
5650         }
5651
5652         /* Verify that uCode images will fit in card's SRAM */
5653         if (inst_size > IWL_MAX_INST_SIZE) {
5654                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5655                                inst_size);
5656                 ret = -EINVAL;
5657                 goto err_release;
5658         }
5659
5660         if (data_size > IWL_MAX_DATA_SIZE) {
5661                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5662                                data_size);
5663                 ret = -EINVAL;
5664                 goto err_release;
5665         }
5666         if (init_size > IWL_MAX_INST_SIZE) {
5667                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5668                                 init_size);
5669                 ret = -EINVAL;
5670                 goto err_release;
5671         }
5672         if (init_data_size > IWL_MAX_DATA_SIZE) {
5673                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5674                                 init_data_size);
5675                 ret = -EINVAL;
5676                 goto err_release;
5677         }
5678         if (boot_size > IWL_MAX_BSM_SIZE) {
5679                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5680                                 boot_size);
5681                 ret = -EINVAL;
5682                 goto err_release;
5683         }
5684
5685         /* Allocate ucode buffers for card's bus-master loading ... */
5686
5687         /* Runtime instructions and 2 copies of data:
5688          * 1) unmodified from disk
5689          * 2) backup cache for save/restore during power-downs */
5690         priv->ucode_code.len = inst_size;
5691         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5692
5693         priv->ucode_data.len = data_size;
5694         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5695
5696         priv->ucode_data_backup.len = data_size;
5697         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5698
5699         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5700             !priv->ucode_data_backup.v_addr)
5701                 goto err_pci_alloc;
5702
5703         /* Initialization instructions and data */
5704         if (init_size && init_data_size) {
5705                 priv->ucode_init.len = init_size;
5706                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5707
5708                 priv->ucode_init_data.len = init_data_size;
5709                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5710
5711                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5712                         goto err_pci_alloc;
5713         }
5714
5715         /* Bootstrap (instructions only, no data) */
5716         if (boot_size) {
5717                 priv->ucode_boot.len = boot_size;
5718                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5719
5720                 if (!priv->ucode_boot.v_addr)
5721                         goto err_pci_alloc;
5722         }
5723
5724         /* Copy images into buffers for card's bus-master reads ... */
5725
5726         /* Runtime instructions (first block of data in file) */
5727         src = &ucode->data[0];
5728         len = priv->ucode_code.len;
5729         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5730         memcpy(priv->ucode_code.v_addr, src, len);
5731         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5732                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5733
5734         /* Runtime data (2nd block)
5735          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5736         src = &ucode->data[inst_size];
5737         len = priv->ucode_data.len;
5738         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5739         memcpy(priv->ucode_data.v_addr, src, len);
5740         memcpy(priv->ucode_data_backup.v_addr, src, len);
5741
5742         /* Initialization instructions (3rd block) */
5743         if (init_size) {
5744                 src = &ucode->data[inst_size + data_size];
5745                 len = priv->ucode_init.len;
5746                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5747                                len);
5748                 memcpy(priv->ucode_init.v_addr, src, len);
5749         }
5750
5751         /* Initialization data (4th block) */
5752         if (init_data_size) {
5753                 src = &ucode->data[inst_size + data_size + init_size];
5754                 len = priv->ucode_init_data.len;
5755                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5756                                (int)len);
5757                 memcpy(priv->ucode_init_data.v_addr, src, len);
5758         }
5759
5760         /* Bootstrap instructions (5th block) */
5761         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5762         len = priv->ucode_boot.len;
5763         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5764                        (int)len);
5765         memcpy(priv->ucode_boot.v_addr, src, len);
5766
5767         /* We have our copies now, allow OS release its copies */
5768         release_firmware(ucode_raw);
5769         return 0;
5770
5771  err_pci_alloc:
5772         IWL_ERROR("failed to allocate pci memory\n");
5773         ret = -ENOMEM;
5774         iwl3945_dealloc_ucode_pci(priv);
5775
5776  err_release:
5777         release_firmware(ucode_raw);
5778
5779  error:
5780         return ret;
5781 }
5782
5783
5784 /**
5785  * iwl3945_set_ucode_ptrs - Set uCode address location
5786  *
5787  * Tell initialization uCode where to find runtime uCode.
5788  *
5789  * BSM registers initially contain pointers to initialization uCode.
5790  * We need to replace them to load runtime uCode inst and data,
5791  * and to save runtime data when powering down.
5792  */
5793 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5794 {
5795         dma_addr_t pinst;
5796         dma_addr_t pdata;
5797         int rc = 0;
5798         unsigned long flags;
5799
5800         /* bits 31:0 for 3945 */
5801         pinst = priv->ucode_code.p_addr;
5802         pdata = priv->ucode_data_backup.p_addr;
5803
5804         spin_lock_irqsave(&priv->lock, flags);
5805         rc = iwl3945_grab_nic_access(priv);
5806         if (rc) {
5807                 spin_unlock_irqrestore(&priv->lock, flags);
5808                 return rc;
5809         }
5810
5811         /* Tell bootstrap uCode where to find image to load */
5812         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5813         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5814         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5815                                  priv->ucode_data.len);
5816
5817         /* Inst bytecount must be last to set up, bit 31 signals uCode
5818          *   that all new ptr/size info is in place */
5819         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5820                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5821
5822         iwl3945_release_nic_access(priv);
5823
5824         spin_unlock_irqrestore(&priv->lock, flags);
5825
5826         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5827
5828         return rc;
5829 }
5830
5831 /**
5832  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5833  *
5834  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5835  *
5836  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5837  */
5838 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5839 {
5840         /* Check alive response for "valid" sign from uCode */
5841         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5842                 /* We had an error bringing up the hardware, so take it
5843                  * all the way back down so we can try again */
5844                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5845                 goto restart;
5846         }
5847
5848         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5849          * This is a paranoid check, because we would not have gotten the
5850          * "initialize" alive if code weren't properly loaded.  */
5851         if (iwl3945_verify_ucode(priv)) {
5852                 /* Runtime instruction load was bad;
5853                  * take it all the way back down so we can try again */
5854                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5855                 goto restart;
5856         }
5857
5858         /* Send pointers to protocol/runtime uCode image ... init code will
5859          * load and launch runtime uCode, which will send us another "Alive"
5860          * notification. */
5861         IWL_DEBUG_INFO("Initialization Alive received.\n");
5862         if (iwl3945_set_ucode_ptrs(priv)) {
5863                 /* Runtime instruction load won't happen;
5864                  * take it all the way back down so we can try again */
5865                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5866                 goto restart;
5867         }
5868         return;
5869
5870  restart:
5871         queue_work(priv->workqueue, &priv->restart);
5872 }
5873
5874
5875 /**
5876  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5877  *                   from protocol/runtime uCode (initialization uCode's
5878  *                   Alive gets handled by iwl3945_init_alive_start()).
5879  */
5880 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5881 {
5882         int rc = 0;
5883         int thermal_spin = 0;
5884         u32 rfkill;
5885
5886         IWL_DEBUG_INFO("Runtime Alive received.\n");
5887
5888         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5889                 /* We had an error bringing up the hardware, so take it
5890                  * all the way back down so we can try again */
5891                 IWL_DEBUG_INFO("Alive failed.\n");
5892                 goto restart;
5893         }
5894
5895         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5896          * This is a paranoid check, because we would not have gotten the
5897          * "runtime" alive if code weren't properly loaded.  */
5898         if (iwl3945_verify_ucode(priv)) {
5899                 /* Runtime instruction load was bad;
5900                  * take it all the way back down so we can try again */
5901                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5902                 goto restart;
5903         }
5904
5905         iwl3945_clear_stations_table(priv);
5906
5907         rc = iwl3945_grab_nic_access(priv);
5908         if (rc) {
5909                 IWL_WARNING("Can not read rfkill status from adapter\n");
5910                 return;
5911         }
5912
5913         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5914         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5915         iwl3945_release_nic_access(priv);
5916
5917         if (rfkill & 0x1) {
5918                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5919                 /* if rfkill is not on, then wait for thermal
5920                  * sensor in adapter to kick in */
5921                 while (iwl3945_hw_get_temperature(priv) == 0) {
5922                         thermal_spin++;
5923                         udelay(10);
5924                 }
5925
5926                 if (thermal_spin)
5927                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5928                                        thermal_spin * 10);
5929         } else
5930                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5931
5932         /* After the ALIVE response, we can send commands to 3945 uCode */
5933         set_bit(STATUS_ALIVE, &priv->status);
5934
5935         /* Clear out the uCode error bit if it is set */
5936         clear_bit(STATUS_FW_ERROR, &priv->status);
5937
5938         if (iwl3945_is_rfkill(priv))
5939                 return;
5940
5941         ieee80211_start_queues(priv->hw);
5942
5943         priv->active_rate = priv->rates_mask;
5944         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5945
5946         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5947
5948         if (iwl3945_is_associated(priv)) {
5949                 struct iwl3945_rxon_cmd *active_rxon =
5950                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5951
5952                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5953                        sizeof(priv->staging_rxon));
5954                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5955         } else {
5956                 /* Initialize our rx_config data */
5957                 iwl3945_connection_init_rx_config(priv);
5958                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5959         }
5960
5961         /* Configure Bluetooth device coexistence support */
5962         iwl3945_send_bt_config(priv);
5963
5964         /* Configure the adapter for unassociated operation */
5965         iwl3945_commit_rxon(priv);
5966
5967         /* At this point, the NIC is initialized and operational */
5968         priv->notif_missed_beacons = 0;
5969         set_bit(STATUS_READY, &priv->status);
5970
5971         iwl3945_reg_txpower_periodic(priv);
5972
5973         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5974         wake_up_interruptible(&priv->wait_command_queue);
5975
5976         if (priv->error_recovering)
5977                 iwl3945_error_recovery(priv);
5978
5979         return;
5980
5981  restart:
5982         queue_work(priv->workqueue, &priv->restart);
5983 }
5984
5985 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5986
5987 static void __iwl3945_down(struct iwl3945_priv *priv)
5988 {
5989         unsigned long flags;
5990         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5991         struct ieee80211_conf *conf = NULL;
5992
5993         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5994
5995         conf = ieee80211_get_hw_conf(priv->hw);
5996
5997         if (!exit_pending)
5998                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5999
6000         iwl3945_clear_stations_table(priv);
6001
6002         /* Unblock any waiting calls */
6003         wake_up_interruptible_all(&priv->wait_command_queue);
6004
6005         /* Wipe out the EXIT_PENDING status bit if we are not actually
6006          * exiting the module */
6007         if (!exit_pending)
6008                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6009
6010         /* stop and reset the on-board processor */
6011         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6012
6013         /* tell the device to stop sending interrupts */
6014         iwl3945_disable_interrupts(priv);
6015
6016         if (priv->mac80211_registered)
6017                 ieee80211_stop_queues(priv->hw);
6018
6019         /* If we have not previously called iwl3945_init() then
6020          * clear all bits but the RF Kill and SUSPEND bits and return */
6021         if (!iwl3945_is_init(priv)) {
6022                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6023                                         STATUS_RF_KILL_HW |
6024                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6025                                         STATUS_RF_KILL_SW |
6026                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6027                                         STATUS_GEO_CONFIGURED |
6028                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6029                                         STATUS_IN_SUSPEND;
6030                 goto exit;
6031         }
6032
6033         /* ...otherwise clear out all the status bits but the RF Kill and
6034          * SUSPEND bits and continue taking the NIC down. */
6035         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6036                                 STATUS_RF_KILL_HW |
6037                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6038                                 STATUS_RF_KILL_SW |
6039                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6040                                 STATUS_GEO_CONFIGURED |
6041                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6042                                 STATUS_IN_SUSPEND |
6043                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6044                                 STATUS_FW_ERROR;
6045
6046         spin_lock_irqsave(&priv->lock, flags);
6047         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6048         spin_unlock_irqrestore(&priv->lock, flags);
6049
6050         iwl3945_hw_txq_ctx_stop(priv);
6051         iwl3945_hw_rxq_stop(priv);
6052
6053         spin_lock_irqsave(&priv->lock, flags);
6054         if (!iwl3945_grab_nic_access(priv)) {
6055                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
6056                                          APMG_CLK_VAL_DMA_CLK_RQT);
6057                 iwl3945_release_nic_access(priv);
6058         }
6059         spin_unlock_irqrestore(&priv->lock, flags);
6060
6061         udelay(5);
6062
6063         iwl3945_hw_nic_stop_master(priv);
6064         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6065         iwl3945_hw_nic_reset(priv);
6066
6067  exit:
6068         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
6069
6070         if (priv->ibss_beacon)
6071                 dev_kfree_skb(priv->ibss_beacon);
6072         priv->ibss_beacon = NULL;
6073
6074         /* clear out any free frames */
6075         iwl3945_clear_free_frames(priv);
6076 }
6077
6078 static void iwl3945_down(struct iwl3945_priv *priv)
6079 {
6080         mutex_lock(&priv->mutex);
6081         __iwl3945_down(priv);
6082         mutex_unlock(&priv->mutex);
6083
6084         iwl3945_cancel_deferred_work(priv);
6085 }
6086
6087 #define MAX_HW_RESTARTS 5
6088
6089 static int __iwl3945_up(struct iwl3945_priv *priv)
6090 {
6091         int rc, i;
6092
6093         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6094                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6095                 return -EIO;
6096         }
6097
6098         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6099                 IWL_WARNING("Radio disabled by SW RF kill (module "
6100                             "parameter)\n");
6101                 return -ENODEV;
6102         }
6103
6104         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6105                 IWL_ERROR("ucode not available for device bringup\n");
6106                 return -EIO;
6107         }
6108
6109         /* If platform's RF_KILL switch is NOT set to KILL */
6110         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6111                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6112                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6113         else {
6114                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6115                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6116                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6117                         return -ENODEV;
6118                 }
6119         }
6120
6121         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6122
6123         rc = iwl3945_hw_nic_init(priv);
6124         if (rc) {
6125                 IWL_ERROR("Unable to int nic\n");
6126                 return rc;
6127         }
6128
6129         /* make sure rfkill handshake bits are cleared */
6130         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6131         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6132                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6133
6134         /* clear (again), then enable host interrupts */
6135         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6136         iwl3945_enable_interrupts(priv);
6137
6138         /* really make sure rfkill handshake bits are cleared */
6139         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6140         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6141
6142         /* Copy original ucode data image from disk into backup cache.
6143          * This will be used to initialize the on-board processor's
6144          * data SRAM for a clean start when the runtime program first loads. */
6145         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6146                priv->ucode_data.len);
6147
6148         /* We return success when we resume from suspend and rf_kill is on. */
6149         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6150                 return 0;
6151
6152         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6153
6154                 iwl3945_clear_stations_table(priv);
6155
6156                 /* load bootstrap state machine,
6157                  * load bootstrap program into processor's memory,
6158                  * prepare to load the "initialize" uCode */
6159                 rc = iwl3945_load_bsm(priv);
6160
6161                 if (rc) {
6162                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6163                         continue;
6164                 }
6165
6166                 /* start card; "initialize" will load runtime ucode */
6167                 iwl3945_nic_start(priv);
6168
6169                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6170
6171                 return 0;
6172         }
6173
6174         set_bit(STATUS_EXIT_PENDING, &priv->status);
6175         __iwl3945_down(priv);
6176
6177         /* tried to restart and config the device for as long as our
6178          * patience could withstand */
6179         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6180         return -EIO;
6181 }
6182
6183
6184 /*****************************************************************************
6185  *
6186  * Workqueue callbacks
6187  *
6188  *****************************************************************************/
6189
6190 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6191 {
6192         struct iwl3945_priv *priv =
6193             container_of(data, struct iwl3945_priv, init_alive_start.work);
6194
6195         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6196                 return;
6197
6198         mutex_lock(&priv->mutex);
6199         iwl3945_init_alive_start(priv);
6200         mutex_unlock(&priv->mutex);
6201 }
6202
6203 static void iwl3945_bg_alive_start(struct work_struct *data)
6204 {
6205         struct iwl3945_priv *priv =
6206             container_of(data, struct iwl3945_priv, alive_start.work);
6207
6208         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6209                 return;
6210
6211         mutex_lock(&priv->mutex);
6212         iwl3945_alive_start(priv);
6213         mutex_unlock(&priv->mutex);
6214 }
6215
6216 static void iwl3945_bg_rf_kill(struct work_struct *work)
6217 {
6218         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6219
6220         wake_up_interruptible(&priv->wait_command_queue);
6221
6222         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6223                 return;
6224
6225         mutex_lock(&priv->mutex);
6226
6227         if (!iwl3945_is_rfkill(priv)) {
6228                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6229                           "HW and/or SW RF Kill no longer active, restarting "
6230                           "device\n");
6231                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6232                         queue_work(priv->workqueue, &priv->restart);
6233         } else {
6234
6235                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6236                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6237                                           "disabled by SW switch\n");
6238                 else
6239                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6240                                     "Kill switch must be turned off for "
6241                                     "wireless networking to work.\n");
6242         }
6243         mutex_unlock(&priv->mutex);
6244 }
6245
6246 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6247
6248 static void iwl3945_bg_scan_check(struct work_struct *data)
6249 {
6250         struct iwl3945_priv *priv =
6251             container_of(data, struct iwl3945_priv, scan_check.work);
6252
6253         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6254                 return;
6255
6256         mutex_lock(&priv->mutex);
6257         if (test_bit(STATUS_SCANNING, &priv->status) ||
6258             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6259                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6260                           "Scan completion watchdog resetting adapter (%dms)\n",
6261                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6262
6263                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6264                         iwl3945_send_scan_abort(priv);
6265         }
6266         mutex_unlock(&priv->mutex);
6267 }
6268
6269 static void iwl3945_bg_request_scan(struct work_struct *data)
6270 {
6271         struct iwl3945_priv *priv =
6272             container_of(data, struct iwl3945_priv, request_scan);
6273         struct iwl3945_host_cmd cmd = {
6274                 .id = REPLY_SCAN_CMD,
6275                 .len = sizeof(struct iwl3945_scan_cmd),
6276                 .meta.flags = CMD_SIZE_HUGE,
6277         };
6278         int rc = 0;
6279         struct iwl3945_scan_cmd *scan;
6280         struct ieee80211_conf *conf = NULL;
6281         u8 direct_mask;
6282         enum ieee80211_band band;
6283
6284         conf = ieee80211_get_hw_conf(priv->hw);
6285
6286         mutex_lock(&priv->mutex);
6287
6288         if (!iwl3945_is_ready(priv)) {
6289                 IWL_WARNING("request scan called when driver not ready.\n");
6290                 goto done;
6291         }
6292
6293         /* Make sure the scan wasn't cancelled before this queued work
6294          * was given the chance to run... */
6295         if (!test_bit(STATUS_SCANNING, &priv->status))
6296                 goto done;
6297
6298         /* This should never be called or scheduled if there is currently
6299          * a scan active in the hardware. */
6300         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6301                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6302                                "Ignoring second request.\n");
6303                 rc = -EIO;
6304                 goto done;
6305         }
6306
6307         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6308                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6309                 goto done;
6310         }
6311
6312         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6313                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6314                 goto done;
6315         }
6316
6317         if (iwl3945_is_rfkill(priv)) {
6318                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6319                 goto done;
6320         }
6321
6322         if (!test_bit(STATUS_READY, &priv->status)) {
6323                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6324                 goto done;
6325         }
6326
6327         if (!priv->scan_bands) {
6328                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6329                 goto done;
6330         }
6331
6332         if (!priv->scan) {
6333                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6334                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6335                 if (!priv->scan) {
6336                         rc = -ENOMEM;
6337                         goto done;
6338                 }
6339         }
6340         scan = priv->scan;
6341         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6342
6343         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6344         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6345
6346         if (iwl3945_is_associated(priv)) {
6347                 u16 interval = 0;
6348                 u32 extra;
6349                 u32 suspend_time = 100;
6350                 u32 scan_suspend_time = 100;
6351                 unsigned long flags;
6352
6353                 IWL_DEBUG_INFO("Scanning while associated...\n");
6354
6355                 spin_lock_irqsave(&priv->lock, flags);
6356                 interval = priv->beacon_int;
6357                 spin_unlock_irqrestore(&priv->lock, flags);
6358
6359                 scan->suspend_time = 0;
6360                 scan->max_out_time = cpu_to_le32(200 * 1024);
6361                 if (!interval)
6362                         interval = suspend_time;
6363                 /*
6364                  * suspend time format:
6365                  *  0-19: beacon interval in usec (time before exec.)
6366                  * 20-23: 0
6367                  * 24-31: number of beacons (suspend between channels)
6368                  */
6369
6370                 extra = (suspend_time / interval) << 24;
6371                 scan_suspend_time = 0xFF0FFFFF &
6372                     (extra | ((suspend_time % interval) * 1024));
6373
6374                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6375                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6376                                scan_suspend_time, interval);
6377         }
6378
6379         /* We should add the ability for user to lock to PASSIVE ONLY */
6380         if (priv->one_direct_scan) {
6381                 IWL_DEBUG_SCAN
6382                     ("Kicking off one direct scan for '%s'\n",
6383                      iwl3945_escape_essid(priv->direct_ssid,
6384                                       priv->direct_ssid_len));
6385                 scan->direct_scan[0].id = WLAN_EID_SSID;
6386                 scan->direct_scan[0].len = priv->direct_ssid_len;
6387                 memcpy(scan->direct_scan[0].ssid,
6388                        priv->direct_ssid, priv->direct_ssid_len);
6389                 direct_mask = 1;
6390         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6391                 scan->direct_scan[0].id = WLAN_EID_SSID;
6392                 scan->direct_scan[0].len = priv->essid_len;
6393                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6394                 direct_mask = 1;
6395         } else
6396                 direct_mask = 0;
6397
6398         /* We don't build a direct scan probe request; the uCode will do
6399          * that based on the direct_mask added to each channel entry */
6400         scan->tx_cmd.len = cpu_to_le16(
6401                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6402                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6403         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6404         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6405         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6406
6407         /* flags + rate selection */
6408
6409         switch (priv->scan_bands) {
6410         case 2:
6411                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6412                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6413                 scan->good_CRC_th = 0;
6414                 band = IEEE80211_BAND_2GHZ;
6415                 break;
6416
6417         case 1:
6418                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6419                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6420                 band = IEEE80211_BAND_5GHZ;
6421                 break;
6422
6423         default:
6424                 IWL_WARNING("Invalid scan band count\n");
6425                 goto done;
6426         }
6427
6428         /* select Rx antennas */
6429         scan->flags |= iwl3945_get_antenna_flags(priv);
6430
6431         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6432                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6433
6434         if (direct_mask)
6435                 IWL_DEBUG_SCAN
6436                     ("Initiating direct scan for %s.\n",
6437                      iwl3945_escape_essid(priv->essid, priv->essid_len));
6438         else
6439                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6440
6441         scan->channel_count =
6442                 iwl3945_get_channels_for_scan(
6443                         priv, band, 1, /* active */
6444                         direct_mask,
6445                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6446
6447         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6448             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6449         cmd.data = scan;
6450         scan->len = cpu_to_le16(cmd.len);
6451
6452         set_bit(STATUS_SCAN_HW, &priv->status);
6453         rc = iwl3945_send_cmd_sync(priv, &cmd);
6454         if (rc)
6455                 goto done;
6456
6457         queue_delayed_work(priv->workqueue, &priv->scan_check,
6458                            IWL_SCAN_CHECK_WATCHDOG);
6459
6460         mutex_unlock(&priv->mutex);
6461         return;
6462
6463  done:
6464         /* inform mac80211 scan aborted */
6465         queue_work(priv->workqueue, &priv->scan_completed);
6466         mutex_unlock(&priv->mutex);
6467 }
6468
6469 static void iwl3945_bg_up(struct work_struct *data)
6470 {
6471         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6472
6473         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6474                 return;
6475
6476         mutex_lock(&priv->mutex);
6477         __iwl3945_up(priv);
6478         mutex_unlock(&priv->mutex);
6479 }
6480
6481 static void iwl3945_bg_restart(struct work_struct *data)
6482 {
6483         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6484
6485         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6486                 return;
6487
6488         iwl3945_down(priv);
6489         queue_work(priv->workqueue, &priv->up);
6490 }
6491
6492 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6493 {
6494         struct iwl3945_priv *priv =
6495             container_of(data, struct iwl3945_priv, rx_replenish);
6496
6497         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6498                 return;
6499
6500         mutex_lock(&priv->mutex);
6501         iwl3945_rx_replenish(priv);
6502         mutex_unlock(&priv->mutex);
6503 }
6504
6505 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6506
6507 static void iwl3945_bg_post_associate(struct work_struct *data)
6508 {
6509         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6510                                              post_associate.work);
6511
6512         int rc = 0;
6513         struct ieee80211_conf *conf = NULL;
6514         DECLARE_MAC_BUF(mac);
6515
6516         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6517                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6518                 return;
6519         }
6520
6521
6522         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6523                         priv->assoc_id,
6524                         print_mac(mac, priv->active_rxon.bssid_addr));
6525
6526         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6527                 return;
6528
6529         mutex_lock(&priv->mutex);
6530
6531         if (!priv->vif || !priv->is_open) {
6532                 mutex_unlock(&priv->mutex);
6533                 return;
6534         }
6535         iwl3945_scan_cancel_timeout(priv, 200);
6536
6537         conf = ieee80211_get_hw_conf(priv->hw);
6538
6539         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6540         iwl3945_commit_rxon(priv);
6541
6542         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6543         iwl3945_setup_rxon_timing(priv);
6544         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6545                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6546         if (rc)
6547                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6548                             "Attempting to continue.\n");
6549
6550         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6551
6552         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6553
6554         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6555                         priv->assoc_id, priv->beacon_int);
6556
6557         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6558                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6559         else
6560                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6561
6562         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6563                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6564                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6565                 else
6566                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6567
6568                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6569                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6570
6571         }
6572
6573         iwl3945_commit_rxon(priv);
6574
6575         switch (priv->iw_mode) {
6576         case IEEE80211_IF_TYPE_STA:
6577                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6578                 break;
6579
6580         case IEEE80211_IF_TYPE_IBSS:
6581
6582                 /* clear out the station table */
6583                 iwl3945_clear_stations_table(priv);
6584
6585                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6586                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6587                 iwl3945_sync_sta(priv, IWL_STA_ID,
6588                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6589                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6590                                  CMD_ASYNC);
6591                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6592                 iwl3945_send_beacon_cmd(priv);
6593
6594                 break;
6595
6596         default:
6597                  IWL_ERROR("%s Should not be called in %d mode\n",
6598                            __FUNCTION__, priv->iw_mode);
6599                 break;
6600         }
6601
6602         iwl3945_sequence_reset(priv);
6603
6604         iwl3945_activate_qos(priv, 0);
6605
6606         /* we have just associated, don't start scan too early */
6607         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6608         mutex_unlock(&priv->mutex);
6609 }
6610
6611 static void iwl3945_bg_abort_scan(struct work_struct *work)
6612 {
6613         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6614
6615         if (!iwl3945_is_ready(priv))
6616                 return;
6617
6618         mutex_lock(&priv->mutex);
6619
6620         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6621         iwl3945_send_scan_abort(priv);
6622
6623         mutex_unlock(&priv->mutex);
6624 }
6625
6626 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6627
6628 static void iwl3945_bg_scan_completed(struct work_struct *work)
6629 {
6630         struct iwl3945_priv *priv =
6631             container_of(work, struct iwl3945_priv, scan_completed);
6632
6633         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6634
6635         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6636                 return;
6637
6638         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6639                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6640
6641         ieee80211_scan_completed(priv->hw);
6642
6643         /* Since setting the TXPOWER may have been deferred while
6644          * performing the scan, fire one off */
6645         mutex_lock(&priv->mutex);
6646         iwl3945_hw_reg_send_txpower(priv);
6647         mutex_unlock(&priv->mutex);
6648 }
6649
6650 /*****************************************************************************
6651  *
6652  * mac80211 entry point functions
6653  *
6654  *****************************************************************************/
6655
6656 #define UCODE_READY_TIMEOUT     (2 * HZ)
6657
6658 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6659 {
6660         struct iwl3945_priv *priv = hw->priv;
6661         int ret;
6662
6663         IWL_DEBUG_MAC80211("enter\n");
6664
6665         if (pci_enable_device(priv->pci_dev)) {
6666                 IWL_ERROR("Fail to pci_enable_device\n");
6667                 return -ENODEV;
6668         }
6669         pci_restore_state(priv->pci_dev);
6670         pci_enable_msi(priv->pci_dev);
6671
6672         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6673                           DRV_NAME, priv);
6674         if (ret) {
6675                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6676                 goto out_disable_msi;
6677         }
6678
6679         /* we should be verifying the device is ready to be opened */
6680         mutex_lock(&priv->mutex);
6681
6682         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6683         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6684          * ucode filename and max sizes are card-specific. */
6685
6686         if (!priv->ucode_code.len) {
6687                 ret = iwl3945_read_ucode(priv);
6688                 if (ret) {
6689                         IWL_ERROR("Could not read microcode: %d\n", ret);
6690                         mutex_unlock(&priv->mutex);
6691                         goto out_release_irq;
6692                 }
6693         }
6694
6695         ret = __iwl3945_up(priv);
6696
6697         mutex_unlock(&priv->mutex);
6698
6699         if (ret)
6700                 goto out_release_irq;
6701
6702         IWL_DEBUG_INFO("Start UP work.\n");
6703
6704         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6705                 return 0;
6706
6707         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6708          * mac80211 will not be run successfully. */
6709         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6710                         test_bit(STATUS_READY, &priv->status),
6711                         UCODE_READY_TIMEOUT);
6712         if (!ret) {
6713                 if (!test_bit(STATUS_READY, &priv->status)) {
6714                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6715                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6716                         ret = -ETIMEDOUT;
6717                         goto out_release_irq;
6718                 }
6719         }
6720
6721         priv->is_open = 1;
6722         IWL_DEBUG_MAC80211("leave\n");
6723         return 0;
6724
6725 out_release_irq:
6726         free_irq(priv->pci_dev->irq, priv);
6727 out_disable_msi:
6728         pci_disable_msi(priv->pci_dev);
6729         pci_disable_device(priv->pci_dev);
6730         priv->is_open = 0;
6731         IWL_DEBUG_MAC80211("leave - failed\n");
6732         return ret;
6733 }
6734
6735 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6736 {
6737         struct iwl3945_priv *priv = hw->priv;
6738
6739         IWL_DEBUG_MAC80211("enter\n");
6740
6741         if (!priv->is_open) {
6742                 IWL_DEBUG_MAC80211("leave - skip\n");
6743                 return;
6744         }
6745
6746         priv->is_open = 0;
6747
6748         if (iwl3945_is_ready_rf(priv)) {
6749                 /* stop mac, cancel any scan request and clear
6750                  * RXON_FILTER_ASSOC_MSK BIT
6751                  */
6752                 mutex_lock(&priv->mutex);
6753                 iwl3945_scan_cancel_timeout(priv, 100);
6754                 cancel_delayed_work(&priv->post_associate);
6755                 mutex_unlock(&priv->mutex);
6756         }
6757
6758         iwl3945_down(priv);
6759
6760         flush_workqueue(priv->workqueue);
6761         free_irq(priv->pci_dev->irq, priv);
6762         pci_disable_msi(priv->pci_dev);
6763         pci_save_state(priv->pci_dev);
6764         pci_disable_device(priv->pci_dev);
6765
6766         IWL_DEBUG_MAC80211("leave\n");
6767 }
6768
6769 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6770                       struct ieee80211_tx_control *ctl)
6771 {
6772         struct iwl3945_priv *priv = hw->priv;
6773
6774         IWL_DEBUG_MAC80211("enter\n");
6775
6776         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6777                 IWL_DEBUG_MAC80211("leave - monitor\n");
6778                 return -1;
6779         }
6780
6781         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6782                      ctl->tx_rate->bitrate);
6783
6784         if (iwl3945_tx_skb(priv, skb, ctl))
6785                 dev_kfree_skb_any(skb);
6786
6787         IWL_DEBUG_MAC80211("leave\n");
6788         return 0;
6789 }
6790
6791 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6792                                  struct ieee80211_if_init_conf *conf)
6793 {
6794         struct iwl3945_priv *priv = hw->priv;
6795         unsigned long flags;
6796         DECLARE_MAC_BUF(mac);
6797
6798         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6799
6800         if (priv->vif) {
6801                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6802                 return -EOPNOTSUPP;
6803         }
6804
6805         spin_lock_irqsave(&priv->lock, flags);
6806         priv->vif = conf->vif;
6807
6808         spin_unlock_irqrestore(&priv->lock, flags);
6809
6810         mutex_lock(&priv->mutex);
6811
6812         if (conf->mac_addr) {
6813                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6814                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6815         }
6816
6817         if (iwl3945_is_ready(priv))
6818                 iwl3945_set_mode(priv, conf->type);
6819
6820         mutex_unlock(&priv->mutex);
6821
6822         IWL_DEBUG_MAC80211("leave\n");
6823         return 0;
6824 }
6825
6826 /**
6827  * iwl3945_mac_config - mac80211 config callback
6828  *
6829  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6830  * be set inappropriately and the driver currently sets the hardware up to
6831  * use it whenever needed.
6832  */
6833 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6834 {
6835         struct iwl3945_priv *priv = hw->priv;
6836         const struct iwl3945_channel_info *ch_info;
6837         unsigned long flags;
6838         int ret = 0;
6839
6840         mutex_lock(&priv->mutex);
6841         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6842
6843         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6844
6845         if (!iwl3945_is_ready(priv)) {
6846                 IWL_DEBUG_MAC80211("leave - not ready\n");
6847                 ret = -EIO;
6848                 goto out;
6849         }
6850
6851         if (unlikely(!iwl3945_param_disable_hw_scan &&
6852                      test_bit(STATUS_SCANNING, &priv->status))) {
6853                 IWL_DEBUG_MAC80211("leave - scanning\n");
6854                 set_bit(STATUS_CONF_PENDING, &priv->status);
6855                 mutex_unlock(&priv->mutex);
6856                 return 0;
6857         }
6858
6859         spin_lock_irqsave(&priv->lock, flags);
6860
6861         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6862                                            conf->channel->hw_value);
6863         if (!is_channel_valid(ch_info)) {
6864                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6865                                conf->channel->hw_value, conf->channel->band);
6866                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6867                 spin_unlock_irqrestore(&priv->lock, flags);
6868                 ret = -EINVAL;
6869                 goto out;
6870         }
6871
6872         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6873
6874         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6875
6876         /* The list of supported rates and rate mask can be different
6877          * for each phymode; since the phymode may have changed, reset
6878          * the rate mask to what mac80211 lists */
6879         iwl3945_set_rate(priv);
6880
6881         spin_unlock_irqrestore(&priv->lock, flags);
6882
6883 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6884         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6885                 iwl3945_hw_channel_switch(priv, conf->channel);
6886                 goto out;
6887         }
6888 #endif
6889
6890         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6891
6892         if (!conf->radio_enabled) {
6893                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6894                 goto out;
6895         }
6896
6897         if (iwl3945_is_rfkill(priv)) {
6898                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6899                 ret = -EIO;
6900                 goto out;
6901         }
6902
6903         iwl3945_set_rate(priv);
6904
6905         if (memcmp(&priv->active_rxon,
6906                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6907                 iwl3945_commit_rxon(priv);
6908         else
6909                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6910
6911         IWL_DEBUG_MAC80211("leave\n");
6912
6913 out:
6914         clear_bit(STATUS_CONF_PENDING, &priv->status);
6915         mutex_unlock(&priv->mutex);
6916         return ret;
6917 }
6918
6919 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6920 {
6921         int rc = 0;
6922
6923         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6924                 return;
6925
6926         /* The following should be done only at AP bring up */
6927         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6928
6929                 /* RXON - unassoc (to set timing command) */
6930                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6931                 iwl3945_commit_rxon(priv);
6932
6933                 /* RXON Timing */
6934                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6935                 iwl3945_setup_rxon_timing(priv);
6936                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6937                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6938                 if (rc)
6939                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6940                                         "Attempting to continue.\n");
6941
6942                 /* FIXME: what should be the assoc_id for AP? */
6943                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6944                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6945                         priv->staging_rxon.flags |=
6946                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6947                 else
6948                         priv->staging_rxon.flags &=
6949                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6950
6951                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6952                         if (priv->assoc_capability &
6953                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6954                                 priv->staging_rxon.flags |=
6955                                         RXON_FLG_SHORT_SLOT_MSK;
6956                         else
6957                                 priv->staging_rxon.flags &=
6958                                         ~RXON_FLG_SHORT_SLOT_MSK;
6959
6960                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6961                                 priv->staging_rxon.flags &=
6962                                         ~RXON_FLG_SHORT_SLOT_MSK;
6963                 }
6964                 /* restore RXON assoc */
6965                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6966                 iwl3945_commit_rxon(priv);
6967                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6968         }
6969         iwl3945_send_beacon_cmd(priv);
6970
6971         /* FIXME - we need to add code here to detect a totally new
6972          * configuration, reset the AP, unassoc, rxon timing, assoc,
6973          * clear sta table, add BCAST sta... */
6974 }
6975
6976 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6977                                         struct ieee80211_vif *vif,
6978                                     struct ieee80211_if_conf *conf)
6979 {
6980         struct iwl3945_priv *priv = hw->priv;
6981         DECLARE_MAC_BUF(mac);
6982         unsigned long flags;
6983         int rc;
6984
6985         if (conf == NULL)
6986                 return -EIO;
6987
6988         if (priv->vif != vif) {
6989                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6990                 mutex_unlock(&priv->mutex);
6991                 return 0;
6992         }
6993
6994         /* XXX: this MUST use conf->mac_addr */
6995
6996         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6997             (!conf->beacon || !conf->ssid_len)) {
6998                 IWL_DEBUG_MAC80211
6999                     ("Leaving in AP mode because HostAPD is not ready.\n");
7000                 return 0;
7001         }
7002
7003         if (!iwl3945_is_alive(priv))
7004                 return -EAGAIN;
7005
7006         mutex_lock(&priv->mutex);
7007
7008         if (conf->bssid)
7009                 IWL_DEBUG_MAC80211("bssid: %s\n",
7010                                    print_mac(mac, conf->bssid));
7011
7012 /*
7013  * very dubious code was here; the probe filtering flag is never set:
7014  *
7015         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7016             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7017  */
7018
7019         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7020                 if (!conf->bssid) {
7021                         conf->bssid = priv->mac_addr;
7022                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7023                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7024                                            print_mac(mac, conf->bssid));
7025                 }
7026                 if (priv->ibss_beacon)
7027                         dev_kfree_skb(priv->ibss_beacon);
7028
7029                 priv->ibss_beacon = conf->beacon;
7030         }
7031
7032         if (iwl3945_is_rfkill(priv))
7033                 goto done;
7034
7035         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7036             !is_multicast_ether_addr(conf->bssid)) {
7037                 /* If there is currently a HW scan going on in the background
7038                  * then we need to cancel it else the RXON below will fail. */
7039                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
7040                         IWL_WARNING("Aborted scan still in progress "
7041                                     "after 100ms\n");
7042                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7043                         mutex_unlock(&priv->mutex);
7044                         return -EAGAIN;
7045                 }
7046                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7047
7048                 /* TODO: Audit driver for usage of these members and see
7049                  * if mac80211 deprecates them (priv->bssid looks like it
7050                  * shouldn't be there, but I haven't scanned the IBSS code
7051                  * to verify) - jpk */
7052                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7053
7054                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7055                         iwl3945_config_ap(priv);
7056                 else {
7057                         rc = iwl3945_commit_rxon(priv);
7058                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7059                                 iwl3945_add_station(priv,
7060                                         priv->active_rxon.bssid_addr, 1, 0);
7061                 }
7062
7063         } else {
7064                 iwl3945_scan_cancel_timeout(priv, 100);
7065                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7066                 iwl3945_commit_rxon(priv);
7067         }
7068
7069  done:
7070         spin_lock_irqsave(&priv->lock, flags);
7071         if (!conf->ssid_len)
7072                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7073         else
7074                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7075
7076         priv->essid_len = conf->ssid_len;
7077         spin_unlock_irqrestore(&priv->lock, flags);
7078
7079         IWL_DEBUG_MAC80211("leave\n");
7080         mutex_unlock(&priv->mutex);
7081
7082         return 0;
7083 }
7084
7085 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
7086                                  unsigned int changed_flags,
7087                                  unsigned int *total_flags,
7088                                  int mc_count, struct dev_addr_list *mc_list)
7089 {
7090         /*
7091          * XXX: dummy
7092          * see also iwl3945_connection_init_rx_config
7093          */
7094         *total_flags = 0;
7095 }
7096
7097 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7098                                      struct ieee80211_if_init_conf *conf)
7099 {
7100         struct iwl3945_priv *priv = hw->priv;
7101
7102         IWL_DEBUG_MAC80211("enter\n");
7103
7104         mutex_lock(&priv->mutex);
7105
7106         if (iwl3945_is_ready_rf(priv)) {
7107                 iwl3945_scan_cancel_timeout(priv, 100);
7108                 cancel_delayed_work(&priv->post_associate);
7109                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7110                 iwl3945_commit_rxon(priv);
7111         }
7112         if (priv->vif == conf->vif) {
7113                 priv->vif = NULL;
7114                 memset(priv->bssid, 0, ETH_ALEN);
7115                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7116                 priv->essid_len = 0;
7117         }
7118         mutex_unlock(&priv->mutex);
7119
7120         IWL_DEBUG_MAC80211("leave\n");
7121 }
7122
7123 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7124 {
7125         int rc = 0;
7126         unsigned long flags;
7127         struct iwl3945_priv *priv = hw->priv;
7128
7129         IWL_DEBUG_MAC80211("enter\n");
7130
7131         mutex_lock(&priv->mutex);
7132         spin_lock_irqsave(&priv->lock, flags);
7133
7134         if (!iwl3945_is_ready_rf(priv)) {
7135                 rc = -EIO;
7136                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7137                 goto out_unlock;
7138         }
7139
7140         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7141                 rc = -EIO;
7142                 IWL_ERROR("ERROR: APs don't scan\n");
7143                 goto out_unlock;
7144         }
7145
7146         /* we don't schedule scan within next_scan_jiffies period */
7147         if (priv->next_scan_jiffies &&
7148                         time_after(priv->next_scan_jiffies, jiffies)) {
7149                 rc = -EAGAIN;
7150                 goto out_unlock;
7151         }
7152         /* if we just finished scan ask for delay */
7153         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7154                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7155                 rc = -EAGAIN;
7156                 goto out_unlock;
7157         }
7158         if (len) {
7159                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7160                                iwl3945_escape_essid(ssid, len), (int)len);
7161
7162                 priv->one_direct_scan = 1;
7163                 priv->direct_ssid_len = (u8)
7164                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7165                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7166         } else
7167                 priv->one_direct_scan = 0;
7168
7169         rc = iwl3945_scan_initiate(priv);
7170
7171         IWL_DEBUG_MAC80211("leave\n");
7172
7173 out_unlock:
7174         spin_unlock_irqrestore(&priv->lock, flags);
7175         mutex_unlock(&priv->mutex);
7176
7177         return rc;
7178 }
7179
7180 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7181                            const u8 *local_addr, const u8 *addr,
7182                            struct ieee80211_key_conf *key)
7183 {
7184         struct iwl3945_priv *priv = hw->priv;
7185         int rc = 0;
7186         u8 sta_id;
7187
7188         IWL_DEBUG_MAC80211("enter\n");
7189
7190         if (!iwl3945_param_hwcrypto) {
7191                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7192                 return -EOPNOTSUPP;
7193         }
7194
7195         if (is_zero_ether_addr(addr))
7196                 /* only support pairwise keys */
7197                 return -EOPNOTSUPP;
7198
7199         sta_id = iwl3945_hw_find_station(priv, addr);
7200         if (sta_id == IWL_INVALID_STATION) {
7201                 DECLARE_MAC_BUF(mac);
7202
7203                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7204                                    print_mac(mac, addr));
7205                 return -EINVAL;
7206         }
7207
7208         mutex_lock(&priv->mutex);
7209
7210         iwl3945_scan_cancel_timeout(priv, 100);
7211
7212         switch (cmd) {
7213         case  SET_KEY:
7214                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7215                 if (!rc) {
7216                         iwl3945_set_rxon_hwcrypto(priv, 1);
7217                         iwl3945_commit_rxon(priv);
7218                         key->hw_key_idx = sta_id;
7219                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7220                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7221                 }
7222                 break;
7223         case DISABLE_KEY:
7224                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7225                 if (!rc) {
7226                         iwl3945_set_rxon_hwcrypto(priv, 0);
7227                         iwl3945_commit_rxon(priv);
7228                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7229                 }
7230                 break;
7231         default:
7232                 rc = -EINVAL;
7233         }
7234
7235         IWL_DEBUG_MAC80211("leave\n");
7236         mutex_unlock(&priv->mutex);
7237
7238         return rc;
7239 }
7240
7241 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7242                            const struct ieee80211_tx_queue_params *params)
7243 {
7244         struct iwl3945_priv *priv = hw->priv;
7245         unsigned long flags;
7246         int q;
7247
7248         IWL_DEBUG_MAC80211("enter\n");
7249
7250         if (!iwl3945_is_ready_rf(priv)) {
7251                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7252                 return -EIO;
7253         }
7254
7255         if (queue >= AC_NUM) {
7256                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7257                 return 0;
7258         }
7259
7260         if (!priv->qos_data.qos_enable) {
7261                 priv->qos_data.qos_active = 0;
7262                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7263                 return 0;
7264         }
7265         q = AC_NUM - 1 - queue;
7266
7267         spin_lock_irqsave(&priv->lock, flags);
7268
7269         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7270         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7271         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7272         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7273                         cpu_to_le16((params->txop * 32));
7274
7275         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7276         priv->qos_data.qos_active = 1;
7277
7278         spin_unlock_irqrestore(&priv->lock, flags);
7279
7280         mutex_lock(&priv->mutex);
7281         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7282                 iwl3945_activate_qos(priv, 1);
7283         else if (priv->assoc_id && iwl3945_is_associated(priv))
7284                 iwl3945_activate_qos(priv, 0);
7285
7286         mutex_unlock(&priv->mutex);
7287
7288         IWL_DEBUG_MAC80211("leave\n");
7289         return 0;
7290 }
7291
7292 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7293                                 struct ieee80211_tx_queue_stats *stats)
7294 {
7295         struct iwl3945_priv *priv = hw->priv;
7296         int i, avail;
7297         struct iwl3945_tx_queue *txq;
7298         struct iwl3945_queue *q;
7299         unsigned long flags;
7300
7301         IWL_DEBUG_MAC80211("enter\n");
7302
7303         if (!iwl3945_is_ready_rf(priv)) {
7304                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7305                 return -EIO;
7306         }
7307
7308         spin_lock_irqsave(&priv->lock, flags);
7309
7310         for (i = 0; i < AC_NUM; i++) {
7311                 txq = &priv->txq[i];
7312                 q = &txq->q;
7313                 avail = iwl3945_queue_space(q);
7314
7315                 stats->data[i].len = q->n_window - avail;
7316                 stats->data[i].limit = q->n_window - q->high_mark;
7317                 stats->data[i].count = q->n_window;
7318
7319         }
7320         spin_unlock_irqrestore(&priv->lock, flags);
7321
7322         IWL_DEBUG_MAC80211("leave\n");
7323
7324         return 0;
7325 }
7326
7327 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7328                              struct ieee80211_low_level_stats *stats)
7329 {
7330         IWL_DEBUG_MAC80211("enter\n");
7331         IWL_DEBUG_MAC80211("leave\n");
7332
7333         return 0;
7334 }
7335
7336 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7337 {
7338         IWL_DEBUG_MAC80211("enter\n");
7339         IWL_DEBUG_MAC80211("leave\n");
7340
7341         return 0;
7342 }
7343
7344 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7345 {
7346         struct iwl3945_priv *priv = hw->priv;
7347         unsigned long flags;
7348
7349         mutex_lock(&priv->mutex);
7350         IWL_DEBUG_MAC80211("enter\n");
7351
7352         iwl3945_reset_qos(priv);
7353
7354         cancel_delayed_work(&priv->post_associate);
7355
7356         spin_lock_irqsave(&priv->lock, flags);
7357         priv->assoc_id = 0;
7358         priv->assoc_capability = 0;
7359         priv->call_post_assoc_from_beacon = 0;
7360
7361         /* new association get rid of ibss beacon skb */
7362         if (priv->ibss_beacon)
7363                 dev_kfree_skb(priv->ibss_beacon);
7364
7365         priv->ibss_beacon = NULL;
7366
7367         priv->beacon_int = priv->hw->conf.beacon_int;
7368         priv->timestamp1 = 0;
7369         priv->timestamp0 = 0;
7370         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7371                 priv->beacon_int = 0;
7372
7373         spin_unlock_irqrestore(&priv->lock, flags);
7374
7375         if (!iwl3945_is_ready_rf(priv)) {
7376                 IWL_DEBUG_MAC80211("leave - not ready\n");
7377                 mutex_unlock(&priv->mutex);
7378                 return;
7379         }
7380
7381         /* we are restarting association process
7382          * clear RXON_FILTER_ASSOC_MSK bit
7383         */
7384         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7385                 iwl3945_scan_cancel_timeout(priv, 100);
7386                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7387                 iwl3945_commit_rxon(priv);
7388         }
7389
7390         /* Per mac80211.h: This is only used in IBSS mode... */
7391         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7392
7393                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7394                 mutex_unlock(&priv->mutex);
7395                 return;
7396         }
7397
7398         priv->only_active_channel = 0;
7399
7400         iwl3945_set_rate(priv);
7401
7402         mutex_unlock(&priv->mutex);
7403
7404         IWL_DEBUG_MAC80211("leave\n");
7405
7406 }
7407
7408 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7409                                  struct ieee80211_tx_control *control)
7410 {
7411         struct iwl3945_priv *priv = hw->priv;
7412         unsigned long flags;
7413
7414         mutex_lock(&priv->mutex);
7415         IWL_DEBUG_MAC80211("enter\n");
7416
7417         if (!iwl3945_is_ready_rf(priv)) {
7418                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7419                 mutex_unlock(&priv->mutex);
7420                 return -EIO;
7421         }
7422
7423         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7424                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7425                 mutex_unlock(&priv->mutex);
7426                 return -EIO;
7427         }
7428
7429         spin_lock_irqsave(&priv->lock, flags);
7430
7431         if (priv->ibss_beacon)
7432                 dev_kfree_skb(priv->ibss_beacon);
7433
7434         priv->ibss_beacon = skb;
7435
7436         priv->assoc_id = 0;
7437
7438         IWL_DEBUG_MAC80211("leave\n");
7439         spin_unlock_irqrestore(&priv->lock, flags);
7440
7441         iwl3945_reset_qos(priv);
7442
7443         queue_work(priv->workqueue, &priv->post_associate.work);
7444
7445         mutex_unlock(&priv->mutex);
7446
7447         return 0;
7448 }
7449
7450 /*****************************************************************************
7451  *
7452  * sysfs attributes
7453  *
7454  *****************************************************************************/
7455
7456 #ifdef CONFIG_IWL3945_DEBUG
7457
7458 /*
7459  * The following adds a new attribute to the sysfs representation
7460  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7461  * used for controlling the debug level.
7462  *
7463  * See the level definitions in iwl for details.
7464  */
7465
7466 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7467 {
7468         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7469 }
7470 static ssize_t store_debug_level(struct device_driver *d,
7471                                  const char *buf, size_t count)
7472 {
7473         char *p = (char *)buf;
7474         u32 val;
7475
7476         val = simple_strtoul(p, &p, 0);
7477         if (p == buf)
7478                 printk(KERN_INFO DRV_NAME
7479                        ": %s is not in hex or decimal form.\n", buf);
7480         else
7481                 iwl3945_debug_level = val;
7482
7483         return strnlen(buf, count);
7484 }
7485
7486 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7487                    show_debug_level, store_debug_level);
7488
7489 #endif /* CONFIG_IWL3945_DEBUG */
7490
7491 static ssize_t show_rf_kill(struct device *d,
7492                             struct device_attribute *attr, char *buf)
7493 {
7494         /*
7495          * 0 - RF kill not enabled
7496          * 1 - SW based RF kill active (sysfs)
7497          * 2 - HW based RF kill active
7498          * 3 - Both HW and SW based RF kill active
7499          */
7500         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7501         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7502                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7503
7504         return sprintf(buf, "%i\n", val);
7505 }
7506
7507 static ssize_t store_rf_kill(struct device *d,
7508                              struct device_attribute *attr,
7509                              const char *buf, size_t count)
7510 {
7511         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7512
7513         mutex_lock(&priv->mutex);
7514         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7515         mutex_unlock(&priv->mutex);
7516
7517         return count;
7518 }
7519
7520 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7521
7522 static ssize_t show_temperature(struct device *d,
7523                                 struct device_attribute *attr, char *buf)
7524 {
7525         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7526
7527         if (!iwl3945_is_alive(priv))
7528                 return -EAGAIN;
7529
7530         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7531 }
7532
7533 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7534
7535 static ssize_t show_rs_window(struct device *d,
7536                               struct device_attribute *attr,
7537                               char *buf)
7538 {
7539         struct iwl3945_priv *priv = d->driver_data;
7540         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7541 }
7542 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7543
7544 static ssize_t show_tx_power(struct device *d,
7545                              struct device_attribute *attr, char *buf)
7546 {
7547         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7548         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7549 }
7550
7551 static ssize_t store_tx_power(struct device *d,
7552                               struct device_attribute *attr,
7553                               const char *buf, size_t count)
7554 {
7555         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7556         char *p = (char *)buf;
7557         u32 val;
7558
7559         val = simple_strtoul(p, &p, 10);
7560         if (p == buf)
7561                 printk(KERN_INFO DRV_NAME
7562                        ": %s is not in decimal form.\n", buf);
7563         else
7564                 iwl3945_hw_reg_set_txpower(priv, val);
7565
7566         return count;
7567 }
7568
7569 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7570
7571 static ssize_t show_flags(struct device *d,
7572                           struct device_attribute *attr, char *buf)
7573 {
7574         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7575
7576         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7577 }
7578
7579 static ssize_t store_flags(struct device *d,
7580                            struct device_attribute *attr,
7581                            const char *buf, size_t count)
7582 {
7583         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7584         u32 flags = simple_strtoul(buf, NULL, 0);
7585
7586         mutex_lock(&priv->mutex);
7587         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7588                 /* Cancel any currently running scans... */
7589                 if (iwl3945_scan_cancel_timeout(priv, 100))
7590                         IWL_WARNING("Could not cancel scan.\n");
7591                 else {
7592                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7593                                        flags);
7594                         priv->staging_rxon.flags = cpu_to_le32(flags);
7595                         iwl3945_commit_rxon(priv);
7596                 }
7597         }
7598         mutex_unlock(&priv->mutex);
7599
7600         return count;
7601 }
7602
7603 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7604
7605 static ssize_t show_filter_flags(struct device *d,
7606                                  struct device_attribute *attr, char *buf)
7607 {
7608         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7609
7610         return sprintf(buf, "0x%04X\n",
7611                 le32_to_cpu(priv->active_rxon.filter_flags));
7612 }
7613
7614 static ssize_t store_filter_flags(struct device *d,
7615                                   struct device_attribute *attr,
7616                                   const char *buf, size_t count)
7617 {
7618         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7619         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7620
7621         mutex_lock(&priv->mutex);
7622         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7623                 /* Cancel any currently running scans... */
7624                 if (iwl3945_scan_cancel_timeout(priv, 100))
7625                         IWL_WARNING("Could not cancel scan.\n");
7626                 else {
7627                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7628                                        "0x%04X\n", filter_flags);
7629                         priv->staging_rxon.filter_flags =
7630                                 cpu_to_le32(filter_flags);
7631                         iwl3945_commit_rxon(priv);
7632                 }
7633         }
7634         mutex_unlock(&priv->mutex);
7635
7636         return count;
7637 }
7638
7639 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7640                    store_filter_flags);
7641
7642 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7643
7644 static ssize_t show_measurement(struct device *d,
7645                                 struct device_attribute *attr, char *buf)
7646 {
7647         struct iwl3945_priv *priv = dev_get_drvdata(d);
7648         struct iwl3945_spectrum_notification measure_report;
7649         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7650         u8 *data = (u8 *) & measure_report;
7651         unsigned long flags;
7652
7653         spin_lock_irqsave(&priv->lock, flags);
7654         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7655                 spin_unlock_irqrestore(&priv->lock, flags);
7656                 return 0;
7657         }
7658         memcpy(&measure_report, &priv->measure_report, size);
7659         priv->measurement_status = 0;
7660         spin_unlock_irqrestore(&priv->lock, flags);
7661
7662         while (size && (PAGE_SIZE - len)) {
7663                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7664                                    PAGE_SIZE - len, 1);
7665                 len = strlen(buf);
7666                 if (PAGE_SIZE - len)
7667                         buf[len++] = '\n';
7668
7669                 ofs += 16;
7670                 size -= min(size, 16U);
7671         }
7672
7673         return len;
7674 }
7675
7676 static ssize_t store_measurement(struct device *d,
7677                                  struct device_attribute *attr,
7678                                  const char *buf, size_t count)
7679 {
7680         struct iwl3945_priv *priv = dev_get_drvdata(d);
7681         struct ieee80211_measurement_params params = {
7682                 .channel = le16_to_cpu(priv->active_rxon.channel),
7683                 .start_time = cpu_to_le64(priv->last_tsf),
7684                 .duration = cpu_to_le16(1),
7685         };
7686         u8 type = IWL_MEASURE_BASIC;
7687         u8 buffer[32];
7688         u8 channel;
7689
7690         if (count) {
7691                 char *p = buffer;
7692                 strncpy(buffer, buf, min(sizeof(buffer), count));
7693                 channel = simple_strtoul(p, NULL, 0);
7694                 if (channel)
7695                         params.channel = channel;
7696
7697                 p = buffer;
7698                 while (*p && *p != ' ')
7699                         p++;
7700                 if (*p)
7701                         type = simple_strtoul(p + 1, NULL, 0);
7702         }
7703
7704         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7705                        "channel %d (for '%s')\n", type, params.channel, buf);
7706         iwl3945_get_measurement(priv, &params, type);
7707
7708         return count;
7709 }
7710
7711 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7712                    show_measurement, store_measurement);
7713 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7714
7715 static ssize_t store_retry_rate(struct device *d,
7716                                 struct device_attribute *attr,
7717                                 const char *buf, size_t count)
7718 {
7719         struct iwl3945_priv *priv = dev_get_drvdata(d);
7720
7721         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7722         if (priv->retry_rate <= 0)
7723                 priv->retry_rate = 1;
7724
7725         return count;
7726 }
7727
7728 static ssize_t show_retry_rate(struct device *d,
7729                                struct device_attribute *attr, char *buf)
7730 {
7731         struct iwl3945_priv *priv = dev_get_drvdata(d);
7732         return sprintf(buf, "%d", priv->retry_rate);
7733 }
7734
7735 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7736                    store_retry_rate);
7737
7738 static ssize_t store_power_level(struct device *d,
7739                                  struct device_attribute *attr,
7740                                  const char *buf, size_t count)
7741 {
7742         struct iwl3945_priv *priv = dev_get_drvdata(d);
7743         int rc;
7744         int mode;
7745
7746         mode = simple_strtoul(buf, NULL, 0);
7747         mutex_lock(&priv->mutex);
7748
7749         if (!iwl3945_is_ready(priv)) {
7750                 rc = -EAGAIN;
7751                 goto out;
7752         }
7753
7754         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7755                 mode = IWL_POWER_AC;
7756         else
7757                 mode |= IWL_POWER_ENABLED;
7758
7759         if (mode != priv->power_mode) {
7760                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7761                 if (rc) {
7762                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7763                         goto out;
7764                 }
7765                 priv->power_mode = mode;
7766         }
7767
7768         rc = count;
7769
7770  out:
7771         mutex_unlock(&priv->mutex);
7772         return rc;
7773 }
7774
7775 #define MAX_WX_STRING 80
7776
7777 /* Values are in microsecond */
7778 static const s32 timeout_duration[] = {
7779         350000,
7780         250000,
7781         75000,
7782         37000,
7783         25000,
7784 };
7785 static const s32 period_duration[] = {
7786         400000,
7787         700000,
7788         1000000,
7789         1000000,
7790         1000000
7791 };
7792
7793 static ssize_t show_power_level(struct device *d,
7794                                 struct device_attribute *attr, char *buf)
7795 {
7796         struct iwl3945_priv *priv = dev_get_drvdata(d);
7797         int level = IWL_POWER_LEVEL(priv->power_mode);
7798         char *p = buf;
7799
7800         p += sprintf(p, "%d ", level);
7801         switch (level) {
7802         case IWL_POWER_MODE_CAM:
7803         case IWL_POWER_AC:
7804                 p += sprintf(p, "(AC)");
7805                 break;
7806         case IWL_POWER_BATTERY:
7807                 p += sprintf(p, "(BATTERY)");
7808                 break;
7809         default:
7810                 p += sprintf(p,
7811                              "(Timeout %dms, Period %dms)",
7812                              timeout_duration[level - 1] / 1000,
7813                              period_duration[level - 1] / 1000);
7814         }
7815
7816         if (!(priv->power_mode & IWL_POWER_ENABLED))
7817                 p += sprintf(p, " OFF\n");
7818         else
7819                 p += sprintf(p, " \n");
7820
7821         return (p - buf + 1);
7822
7823 }
7824
7825 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7826                    store_power_level);
7827
7828 static ssize_t show_channels(struct device *d,
7829                              struct device_attribute *attr, char *buf)
7830 {
7831         /* all this shit doesn't belong into sysfs anyway */
7832         return 0;
7833 }
7834
7835 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7836
7837 static ssize_t show_statistics(struct device *d,
7838                                struct device_attribute *attr, char *buf)
7839 {
7840         struct iwl3945_priv *priv = dev_get_drvdata(d);
7841         u32 size = sizeof(struct iwl3945_notif_statistics);
7842         u32 len = 0, ofs = 0;
7843         u8 *data = (u8 *) & priv->statistics;
7844         int rc = 0;
7845
7846         if (!iwl3945_is_alive(priv))
7847                 return -EAGAIN;
7848
7849         mutex_lock(&priv->mutex);
7850         rc = iwl3945_send_statistics_request(priv);
7851         mutex_unlock(&priv->mutex);
7852
7853         if (rc) {
7854                 len = sprintf(buf,
7855                               "Error sending statistics request: 0x%08X\n", rc);
7856                 return len;
7857         }
7858
7859         while (size && (PAGE_SIZE - len)) {
7860                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7861                                    PAGE_SIZE - len, 1);
7862                 len = strlen(buf);
7863                 if (PAGE_SIZE - len)
7864                         buf[len++] = '\n';
7865
7866                 ofs += 16;
7867                 size -= min(size, 16U);
7868         }
7869
7870         return len;
7871 }
7872
7873 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7874
7875 static ssize_t show_antenna(struct device *d,
7876                             struct device_attribute *attr, char *buf)
7877 {
7878         struct iwl3945_priv *priv = dev_get_drvdata(d);
7879
7880         if (!iwl3945_is_alive(priv))
7881                 return -EAGAIN;
7882
7883         return sprintf(buf, "%d\n", priv->antenna);
7884 }
7885
7886 static ssize_t store_antenna(struct device *d,
7887                              struct device_attribute *attr,
7888                              const char *buf, size_t count)
7889 {
7890         int ant;
7891         struct iwl3945_priv *priv = dev_get_drvdata(d);
7892
7893         if (count == 0)
7894                 return 0;
7895
7896         if (sscanf(buf, "%1i", &ant) != 1) {
7897                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7898                 return count;
7899         }
7900
7901         if ((ant >= 0) && (ant <= 2)) {
7902                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7903                 priv->antenna = (enum iwl3945_antenna)ant;
7904         } else
7905                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7906
7907
7908         return count;
7909 }
7910
7911 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7912
7913 static ssize_t show_status(struct device *d,
7914                            struct device_attribute *attr, char *buf)
7915 {
7916         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7917         if (!iwl3945_is_alive(priv))
7918                 return -EAGAIN;
7919         return sprintf(buf, "0x%08x\n", (int)priv->status);
7920 }
7921
7922 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7923
7924 static ssize_t dump_error_log(struct device *d,
7925                               struct device_attribute *attr,
7926                               const char *buf, size_t count)
7927 {
7928         char *p = (char *)buf;
7929
7930         if (p[0] == '1')
7931                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7932
7933         return strnlen(buf, count);
7934 }
7935
7936 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7937
7938 static ssize_t dump_event_log(struct device *d,
7939                               struct device_attribute *attr,
7940                               const char *buf, size_t count)
7941 {
7942         char *p = (char *)buf;
7943
7944         if (p[0] == '1')
7945                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7946
7947         return strnlen(buf, count);
7948 }
7949
7950 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7951
7952 /*****************************************************************************
7953  *
7954  * driver setup and teardown
7955  *
7956  *****************************************************************************/
7957
7958 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7959 {
7960         priv->workqueue = create_workqueue(DRV_NAME);
7961
7962         init_waitqueue_head(&priv->wait_command_queue);
7963
7964         INIT_WORK(&priv->up, iwl3945_bg_up);
7965         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7966         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7967         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7968         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7969         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7970         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7971         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7972         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
7973         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7974         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7975         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7976
7977         iwl3945_hw_setup_deferred_work(priv);
7978
7979         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7980                      iwl3945_irq_tasklet, (unsigned long)priv);
7981 }
7982
7983 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7984 {
7985         iwl3945_hw_cancel_deferred_work(priv);
7986
7987         cancel_delayed_work_sync(&priv->init_alive_start);
7988         cancel_delayed_work(&priv->scan_check);
7989         cancel_delayed_work(&priv->alive_start);
7990         cancel_delayed_work(&priv->post_associate);
7991         cancel_work_sync(&priv->beacon_update);
7992 }
7993
7994 static struct attribute *iwl3945_sysfs_entries[] = {
7995         &dev_attr_antenna.attr,
7996         &dev_attr_channels.attr,
7997         &dev_attr_dump_errors.attr,
7998         &dev_attr_dump_events.attr,
7999         &dev_attr_flags.attr,
8000         &dev_attr_filter_flags.attr,
8001 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
8002         &dev_attr_measurement.attr,
8003 #endif
8004         &dev_attr_power_level.attr,
8005         &dev_attr_retry_rate.attr,
8006         &dev_attr_rf_kill.attr,
8007         &dev_attr_rs_window.attr,
8008         &dev_attr_statistics.attr,
8009         &dev_attr_status.attr,
8010         &dev_attr_temperature.attr,
8011         &dev_attr_tx_power.attr,
8012
8013         NULL
8014 };
8015
8016 static struct attribute_group iwl3945_attribute_group = {
8017         .name = NULL,           /* put in device directory */
8018         .attrs = iwl3945_sysfs_entries,
8019 };
8020
8021 static struct ieee80211_ops iwl3945_hw_ops = {
8022         .tx = iwl3945_mac_tx,
8023         .start = iwl3945_mac_start,
8024         .stop = iwl3945_mac_stop,
8025         .add_interface = iwl3945_mac_add_interface,
8026         .remove_interface = iwl3945_mac_remove_interface,
8027         .config = iwl3945_mac_config,
8028         .config_interface = iwl3945_mac_config_interface,
8029         .configure_filter = iwl3945_configure_filter,
8030         .set_key = iwl3945_mac_set_key,
8031         .get_stats = iwl3945_mac_get_stats,
8032         .get_tx_stats = iwl3945_mac_get_tx_stats,
8033         .conf_tx = iwl3945_mac_conf_tx,
8034         .get_tsf = iwl3945_mac_get_tsf,
8035         .reset_tsf = iwl3945_mac_reset_tsf,
8036         .beacon_update = iwl3945_mac_beacon_update,
8037         .hw_scan = iwl3945_mac_hw_scan
8038 };
8039
8040 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8041 {
8042         int err = 0;
8043         struct iwl3945_priv *priv;
8044         struct ieee80211_hw *hw;
8045         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
8046         int i;
8047         DECLARE_MAC_BUF(mac);
8048
8049         /* Disabling hardware scan means that mac80211 will perform scans
8050          * "the hard way", rather than using device's scan. */
8051         if (iwl3945_param_disable_hw_scan) {
8052                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8053                 iwl3945_hw_ops.hw_scan = NULL;
8054         }
8055
8056         if ((iwl3945_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8057             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8058                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8059                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8060                 err = -EINVAL;
8061                 goto out;
8062         }
8063
8064         /* mac80211 allocates memory for this device instance, including
8065          *   space for this driver's private structure */
8066         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
8067         if (hw == NULL) {
8068                 IWL_ERROR("Can not allocate network device\n");
8069                 err = -ENOMEM;
8070                 goto out;
8071         }
8072         SET_IEEE80211_DEV(hw, &pdev->dev);
8073
8074         hw->rate_control_algorithm = "iwl-3945-rs";
8075
8076         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8077         priv = hw->priv;
8078         priv->hw = hw;
8079
8080         priv->pci_dev = pdev;
8081         priv->cfg = cfg;
8082
8083         /* Select antenna (may be helpful if only one antenna is connected) */
8084         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
8085 #ifdef CONFIG_IWL3945_DEBUG
8086         iwl3945_debug_level = iwl3945_param_debug;
8087         atomic_set(&priv->restrict_refcnt, 0);
8088 #endif
8089         priv->retry_rate = 1;
8090
8091         priv->ibss_beacon = NULL;
8092
8093         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8094          *   the range of signal quality values that we'll provide.
8095          * Negative values for level/noise indicate that we'll provide dBm.
8096          * For WE, at least, non-0 values here *enable* display of values
8097          *   in app (iwconfig). */
8098         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8099         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8100         hw->max_signal = 100;   /* link quality indication (%) */
8101
8102         /* Tell mac80211 our Tx characteristics */
8103         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8104
8105         /* 4 EDCA QOS priorities */
8106         hw->queues = 4;
8107
8108         spin_lock_init(&priv->lock);
8109         spin_lock_init(&priv->power_data.lock);
8110         spin_lock_init(&priv->sta_lock);
8111         spin_lock_init(&priv->hcmd_lock);
8112
8113         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8114                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8115
8116         INIT_LIST_HEAD(&priv->free_frames);
8117
8118         mutex_init(&priv->mutex);
8119         if (pci_enable_device(pdev)) {
8120                 err = -ENODEV;
8121                 goto out_ieee80211_free_hw;
8122         }
8123
8124         pci_set_master(pdev);
8125
8126         /* Clear the driver's (not device's) station table */
8127         iwl3945_clear_stations_table(priv);
8128
8129         priv->data_retry_limit = -1;
8130         priv->ieee_channels = NULL;
8131         priv->ieee_rates = NULL;
8132         priv->band = IEEE80211_BAND_2GHZ;
8133
8134         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8135         if (!err)
8136                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8137         if (err) {
8138                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8139                 goto out_pci_disable_device;
8140         }
8141
8142         pci_set_drvdata(pdev, priv);
8143         err = pci_request_regions(pdev, DRV_NAME);
8144         if (err)
8145                 goto out_pci_disable_device;
8146
8147         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8148          * PCI Tx retries from interfering with C3 CPU state */
8149         pci_write_config_byte(pdev, 0x41, 0x00);
8150
8151         priv->hw_base = pci_iomap(pdev, 0, 0);
8152         if (!priv->hw_base) {
8153                 err = -ENODEV;
8154                 goto out_pci_release_regions;
8155         }
8156
8157         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8158                         (unsigned long long) pci_resource_len(pdev, 0));
8159         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8160
8161         /* Initialize module parameter values here */
8162
8163         /* Disable radio (SW RF KILL) via parameter when loading driver */
8164         if (iwl3945_param_disable) {
8165                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8166                 IWL_DEBUG_INFO("Radio disabled.\n");
8167         }
8168
8169         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8170
8171         printk(KERN_INFO DRV_NAME
8172                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8173
8174         /* Device-specific setup */
8175         if (iwl3945_hw_set_hw_setting(priv)) {
8176                 IWL_ERROR("failed to set hw settings\n");
8177                 goto out_iounmap;
8178         }
8179
8180         if (iwl3945_param_qos_enable)
8181                 priv->qos_data.qos_enable = 1;
8182
8183         iwl3945_reset_qos(priv);
8184
8185         priv->qos_data.qos_active = 0;
8186         priv->qos_data.qos_cap.val = 0;
8187
8188         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8189         iwl3945_setup_deferred_work(priv);
8190         iwl3945_setup_rx_handlers(priv);
8191
8192         priv->rates_mask = IWL_RATES_MASK;
8193         /* If power management is turned on, default to AC mode */
8194         priv->power_mode = IWL_POWER_AC;
8195         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8196
8197         iwl3945_disable_interrupts(priv);
8198
8199         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8200         if (err) {
8201                 IWL_ERROR("failed to create sysfs device attributes\n");
8202                 goto out_release_irq;
8203         }
8204
8205         /* nic init */
8206         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8207                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8208
8209         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8210         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8211                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8212                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8213         if (err < 0) {
8214                 IWL_DEBUG_INFO("Failed to init the card\n");
8215                 goto out_remove_sysfs;
8216         }
8217         /* Read the EEPROM */
8218         err = iwl3945_eeprom_init(priv);
8219         if (err) {
8220                 IWL_ERROR("Unable to init EEPROM\n");
8221                 goto out_remove_sysfs;
8222         }
8223         /* MAC Address location in EEPROM same for 3945/4965 */
8224         get_eeprom_mac(priv, priv->mac_addr);
8225         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8226         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8227
8228         err = iwl3945_init_channel_map(priv);
8229         if (err) {
8230                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8231                 goto out_remove_sysfs;
8232         }
8233
8234         err = iwl3945_init_geos(priv);
8235         if (err) {
8236                 IWL_ERROR("initializing geos failed: %d\n", err);
8237                 goto out_free_channel_map;
8238         }
8239
8240         iwl3945_rate_control_register(priv->hw);
8241         err = ieee80211_register_hw(priv->hw);
8242         if (err) {
8243                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8244                 goto out_free_geos;
8245         }
8246
8247         priv->hw->conf.beacon_int = 100;
8248         priv->mac80211_registered = 1;
8249         pci_save_state(pdev);
8250         pci_disable_device(pdev);
8251
8252         return 0;
8253
8254  out_free_geos:
8255         iwl3945_free_geos(priv);
8256  out_free_channel_map:
8257         iwl3945_free_channel_map(priv);
8258  out_remove_sysfs:
8259         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8260
8261  out_release_irq:
8262         destroy_workqueue(priv->workqueue);
8263         priv->workqueue = NULL;
8264         iwl3945_unset_hw_setting(priv);
8265
8266  out_iounmap:
8267         pci_iounmap(pdev, priv->hw_base);
8268  out_pci_release_regions:
8269         pci_release_regions(pdev);
8270  out_pci_disable_device:
8271         pci_disable_device(pdev);
8272         pci_set_drvdata(pdev, NULL);
8273  out_ieee80211_free_hw:
8274         ieee80211_free_hw(priv->hw);
8275  out:
8276         return err;
8277 }
8278
8279 static void iwl3945_pci_remove(struct pci_dev *pdev)
8280 {
8281         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8282         struct list_head *p, *q;
8283         int i;
8284
8285         if (!priv)
8286                 return;
8287
8288         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8289
8290         set_bit(STATUS_EXIT_PENDING, &priv->status);
8291
8292         iwl3945_down(priv);
8293
8294         /* Free MAC hash list for ADHOC */
8295         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8296                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8297                         list_del(p);
8298                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8299                 }
8300         }
8301
8302         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8303
8304         iwl3945_dealloc_ucode_pci(priv);
8305
8306         if (priv->rxq.bd)
8307                 iwl3945_rx_queue_free(priv, &priv->rxq);
8308         iwl3945_hw_txq_ctx_free(priv);
8309
8310         iwl3945_unset_hw_setting(priv);
8311         iwl3945_clear_stations_table(priv);
8312
8313         if (priv->mac80211_registered) {
8314                 ieee80211_unregister_hw(priv->hw);
8315                 iwl3945_rate_control_unregister(priv->hw);
8316         }
8317
8318         /*netif_stop_queue(dev); */
8319         flush_workqueue(priv->workqueue);
8320
8321         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8322          * priv->workqueue... so we can't take down the workqueue
8323          * until now... */
8324         destroy_workqueue(priv->workqueue);
8325         priv->workqueue = NULL;
8326
8327         pci_iounmap(pdev, priv->hw_base);
8328         pci_release_regions(pdev);
8329         pci_disable_device(pdev);
8330         pci_set_drvdata(pdev, NULL);
8331
8332         iwl3945_free_channel_map(priv);
8333         iwl3945_free_geos(priv);
8334
8335         if (priv->ibss_beacon)
8336                 dev_kfree_skb(priv->ibss_beacon);
8337
8338         ieee80211_free_hw(priv->hw);
8339 }
8340
8341 #ifdef CONFIG_PM
8342
8343 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8344 {
8345         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8346
8347         if (priv->is_open) {
8348                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8349                 iwl3945_mac_stop(priv->hw);
8350                 priv->is_open = 1;
8351         }
8352
8353         pci_set_power_state(pdev, PCI_D3hot);
8354
8355         return 0;
8356 }
8357
8358 static int iwl3945_pci_resume(struct pci_dev *pdev)
8359 {
8360         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8361
8362         pci_set_power_state(pdev, PCI_D0);
8363
8364         if (priv->is_open)
8365                 iwl3945_mac_start(priv->hw);
8366
8367         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8368         return 0;
8369 }
8370
8371 #endif /* CONFIG_PM */
8372
8373 /*****************************************************************************
8374  *
8375  * driver and module entry point
8376  *
8377  *****************************************************************************/
8378
8379 static struct pci_driver iwl3945_driver = {
8380         .name = DRV_NAME,
8381         .id_table = iwl3945_hw_card_ids,
8382         .probe = iwl3945_pci_probe,
8383         .remove = __devexit_p(iwl3945_pci_remove),
8384 #ifdef CONFIG_PM
8385         .suspend = iwl3945_pci_suspend,
8386         .resume = iwl3945_pci_resume,
8387 #endif
8388 };
8389
8390 static int __init iwl3945_init(void)
8391 {
8392
8393         int ret;
8394         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8395         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8396         ret = pci_register_driver(&iwl3945_driver);
8397         if (ret) {
8398                 IWL_ERROR("Unable to initialize PCI module\n");
8399                 return ret;
8400         }
8401 #ifdef CONFIG_IWL3945_DEBUG
8402         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8403         if (ret) {
8404                 IWL_ERROR("Unable to create driver sysfs file\n");
8405                 pci_unregister_driver(&iwl3945_driver);
8406                 return ret;
8407         }
8408 #endif
8409
8410         return ret;
8411 }
8412
8413 static void __exit iwl3945_exit(void)
8414 {
8415 #ifdef CONFIG_IWL3945_DEBUG
8416         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8417 #endif
8418         pci_unregister_driver(&iwl3945_driver);
8419 }
8420
8421 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8422 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8423 module_param_named(disable, iwl3945_param_disable, int, 0444);
8424 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8425 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8426 MODULE_PARM_DESC(hwcrypto,
8427                  "using hardware crypto engine (default 0 [software])\n");
8428 module_param_named(debug, iwl3945_param_debug, int, 0444);
8429 MODULE_PARM_DESC(debug, "debug output mask");
8430 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8431 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8432
8433 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8434 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8435
8436 /* QoS */
8437 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8438 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8439
8440 module_exit(iwl3945_exit);
8441 module_init(iwl3945_init);