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.h"
  50 #include "iwl-helpers.h"
  51
  52 #ifdef CONFIG_IWL3945_DEBUG
  53 u32 iwl3945_debug_level;
  54 #endif
  55
  56 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  57                                   struct iwl3945_tx_queue *txq);
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /* module parameters */
  66 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  67 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  68 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  69 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  70 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  71 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  72 int iwl3945_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION \
  80 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  81
  82 #ifdef CONFIG_IWL3945_DEBUG
  83 #define VD "d"
  84 #else
  85 #define VD
  86 #endif
  87
  88 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  89 #define VS "s"
  90 #else
  91 #define VS
  92 #endif
  93
  94 #define IWLWIFI_VERSION "1.2.23k" VD VS
  95 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  96 #define DRV_VERSION     IWLWIFI_VERSION
  97
  98 /* Change firmware file name, using "-" and incrementing number,
  99  *   *only* when uCode interface or architecture changes so that it
 100  *   is not compatible with earlier drivers.
 101  * This number will also appear in << 8 position of 1st dword of uCode file */
 102 #define IWL3945_UCODE_API "-1"
 103
 104 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 105 MODULE_VERSION(DRV_VERSION);
 106 MODULE_AUTHOR(DRV_COPYRIGHT);
 107 MODULE_LICENSE("GPL");
 108
 109 static __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 110 {
 111         u16 fc = le16_to_cpu(hdr->frame_control);
 112         int hdr_len = ieee80211_get_hdrlen(fc);
 113
 114         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 115                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 116         return NULL;
 117 }
 118
 119 static const struct ieee80211_supported_band *iwl3945_get_band(
 120                 struct iwl3945_priv *priv, enum ieee80211_band band)
 121 {
 122         return priv->hw->wiphy->bands[band];
 123 }
 124
 125 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 126 {
 127         /* Single white space is for Linksys APs */
 128         if (essid_len == 1 && essid[0] == ' ')
 129                 return 1;
 130
 131         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 132         while (essid_len) {
 133                 essid_len--;
 134                 if (essid[essid_len] != '\0')
 135                         return 0;
 136         }
 137
 138         return 1;
 139 }
 140
 141 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 142 {
 143         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 144         const char *s = essid;
 145         char *d = escaped;
 146
 147         if (iwl3945_is_empty_essid(essid, essid_len)) {
 148                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 149                 return escaped;
 150         }
 151
 152         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 153         while (essid_len--) {
 154                 if (*s == '\0') {
 155                         *d++ = '\\';
 156                         *d++ = '0';
 157                         s++;
 158                 } else
 159                         *d++ = *s++;
 160         }
 161         *d = '\0';
 162         return escaped;
 163 }
 164
 165 static void iwl3945_print_hex_dump(int level, void *p, u32 len)
 166 {
 167 #ifdef CONFIG_IWL3945_DEBUG
 168         if (!(iwl3945_debug_level & level))
 169                 return;
 170
 171         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 172                         p, len, 1);
 173 #endif
 174 }
 175
 176 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 177  * DMA services
 178  *
 179  * Theory of operation
 180  *
 181  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 182  * of buffer descriptors, each of which points to one or more data buffers for
 183  * the device to read from or fill.  Driver and device exchange status of each
 184  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 185  * entries in each circular buffer, to protect against confusing empty and full
 186  * queue states.
 187  *
 188  * The device reads or writes the data in the queues via the device's several
 189  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 190  *
 191  * For Tx queue, there are low mark and high mark limits. If, after queuing
 192  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 193  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 194  * Tx queue resumed.
 195  *
 196  * The 3945 operates with six queues:  One receive queue, one transmit queue
 197  * (#4) for sending commands to the device firmware, and four transmit queues
 198  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 199  ***************************************************/
 200
 201 static int iwl3945_queue_space(const struct iwl3945_queue *q)
 202 {
 203         int s = q->read_ptr - q->write_ptr;
 204
 205         if (q->read_ptr > q->write_ptr)
 206                 s -= q->n_bd;
 207
 208         if (s <= 0)
 209                 s += q->n_window;
 210         /* keep some reserve to not confuse empty and full situations */
 211         s -= 2;
 212         if (s < 0)
 213                 s = 0;
 214         return s;
 215 }
 216
 217 /**
 218  * iwl3945_queue_inc_wrap - increment queue index, wrap back to beginning
 219  * @index -- current index
 220  * @n_bd -- total number of entries in queue (must be power of 2)
 221  */
 222 static inline int iwl3945_queue_inc_wrap(int index, int n_bd)
 223 {
 224         return ++index & (n_bd - 1);
 225 }
 226
 227 /**
 228  * iwl3945_queue_dec_wrap - increment queue index, wrap back to end
 229  * @index -- current index
 230  * @n_bd -- total number of entries in queue (must be power of 2)
 231  */
 232 static inline int iwl3945_queue_dec_wrap(int index, int n_bd)
 233 {
 234         return --index & (n_bd - 1);
 235 }
 236
 237 static inline int x2_queue_used(const struct iwl3945_queue *q, int i)
 238 {
 239         return q->write_ptr > q->read_ptr ?
 240                 (i >= q->read_ptr && i < q->write_ptr) :
 241                 !(i < q->read_ptr && i >= q->write_ptr);
 242 }
 243
 244 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 245 {
 246         /* This is for scan command, the big buffer at end of command array */
 247         if (is_huge)
 248                 return q->n_window;     /* must be power of 2 */
 249
 250         /* Otherwise, use normal size buffers */
 251         return index & (q->n_window - 1);
 252 }
 253
 254 /**
 255  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 256  */
 257 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 258                           int count, int slots_num, u32 id)
 259 {
 260         q->n_bd = count;
 261         q->n_window = slots_num;
 262         q->id = id;
 263
 264         /* count must be power-of-two size, otherwise iwl3945_queue_inc_wrap
 265          * and iwl3945_queue_dec_wrap are broken. */
 266         BUG_ON(!is_power_of_2(count));
 267
 268         /* slots_num must be power-of-two size, otherwise
 269          * get_cmd_index is broken. */
 270         BUG_ON(!is_power_of_2(slots_num));
 271
 272         q->low_mark = q->n_window / 4;
 273         if (q->low_mark < 4)
 274                 q->low_mark = 4;
 275
 276         q->high_mark = q->n_window / 8;
 277         if (q->high_mark < 2)
 278                 q->high_mark = 2;
 279
 280         q->write_ptr = q->read_ptr = 0;
 281
 282         return 0;
 283 }
 284
 285 /**
 286  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 287  */
 288 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 289                               struct iwl3945_tx_queue *txq, u32 id)
 290 {
 291         struct pci_dev *dev = priv->pci_dev;
 292
 293         /* Driver private data, only for Tx (not command) queues,
 294          * not shared with device. */
 295         if (id != IWL_CMD_QUEUE_NUM) {
 296                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 297                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 298                 if (!txq->txb) {
 299                         IWL_ERROR("kmalloc for auxiliary BD "
 300                                   "structures failed\n");
 301                         goto error;
 302                 }
 303         } else
 304                 txq->txb = NULL;
 305
 306         /* Circular buffer of transmit frame descriptors (TFDs),
 307          * shared with device */
 308         txq->bd = pci_alloc_consistent(dev,
 309                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 310                         &txq->q.dma_addr);
 311
 312         if (!txq->bd) {
 313                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 314                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 315                 goto error;
 316         }
 317         txq->q.id = id;
 318
 319         return 0;
 320
 321  error:
 322         if (txq->txb) {
 323                 kfree(txq->txb);
 324                 txq->txb = NULL;
 325         }
 326
 327         return -ENOMEM;
 328 }
 329
 330 /**
 331  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 332  */
 333 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 334                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 335 {
 336         struct pci_dev *dev = priv->pci_dev;
 337         int len;
 338         int rc = 0;
 339
 340         /*
 341          * Alloc buffer array for commands (Tx or other types of commands).
 342          * For the command queue (#4), allocate command space + one big
 343          * command for scan, since scan command is very huge; the system will
 344          * not have two scans at the same time, so only one is needed.
 345          * For data Tx queues (all other queues), no super-size command
 346          * space is needed.
 347          */
 348         len = sizeof(struct iwl3945_cmd) * slots_num;
 349         if (txq_id == IWL_CMD_QUEUE_NUM)
 350                 len +=  IWL_MAX_SCAN_SIZE;
 351         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 352         if (!txq->cmd)
 353                 return -ENOMEM;
 354
 355         /* Alloc driver data array and TFD circular buffer */
 356         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 357         if (rc) {
 358                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 359
 360                 return -ENOMEM;
 361         }
 362         txq->need_update = 0;
 363
 364         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 365          * iwl3945_queue_inc_wrap and iwl3945_queue_dec_wrap are broken. */
 366         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 367
 368         /* Initialize queue high/low-water, head/tail indexes */
 369         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 370
 371         /* Tell device where to find queue, enable DMA channel. */
 372         iwl3945_hw_tx_queue_init(priv, txq);
 373
 374         return 0;
 375 }
 376
 377 /**
 378  * iwl3945_tx_queue_free - Deallocate DMA queue.
 379  * @txq: Transmit queue to deallocate.
 380  *
 381  * Empty queue by removing and destroying all BD's.
 382  * Free all buffers.
 383  * 0-fill, but do not free "txq" descriptor structure.
 384  */
 385 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 386 {
 387         struct iwl3945_queue *q = &txq->q;
 388         struct pci_dev *dev = priv->pci_dev;
 389         int len;
 390
 391         if (q->n_bd == 0)
 392                 return;
 393
 394         /* first, empty all BD's */
 395         for (; q->write_ptr != q->read_ptr;
 396              q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd))
 397                 iwl3945_hw_txq_free_tfd(priv, txq);
 398
 399         len = sizeof(struct iwl3945_cmd) * q->n_window;
 400         if (q->id == IWL_CMD_QUEUE_NUM)
 401                 len += IWL_MAX_SCAN_SIZE;
 402
 403         /* De-alloc array of command/tx buffers */
 404         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 405
 406         /* De-alloc circular buffer of TFDs */
 407         if (txq->q.n_bd)
 408                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 409                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 410
 411         /* De-alloc array of per-TFD driver data */
 412         if (txq->txb) {
 413                 kfree(txq->txb);
 414                 txq->txb = NULL;
 415         }
 416
 417         /* 0-fill queue descriptor structure */
 418         memset(txq, 0, sizeof(*txq));
 419 }
 420
 421 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 422
 423 /*************** STATION TABLE MANAGEMENT ****
 424  * mac80211 should be examined to determine if sta_info is duplicating
 425  * the functionality provided here
 426  */
 427
 428 /**************************************************************/
 429 #if 0 /* temporary disable till we add real remove station */
 430 /**
 431  * iwl3945_remove_station - Remove driver's knowledge of station.
 432  *
 433  * NOTE:  This does not remove station from device's station table.
 434  */
 435 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 436 {
 437         int index = IWL_INVALID_STATION;
 438         int i;
 439         unsigned long flags;
 440
 441         spin_lock_irqsave(&priv->sta_lock, flags);
 442
 443         if (is_ap)
 444                 index = IWL_AP_ID;
 445         else if (is_broadcast_ether_addr(addr))
 446                 index = priv->hw_setting.bcast_sta_id;
 447         else
 448                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 449                         if (priv->stations[i].used &&
 450                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 451                                                 addr)) {
 452                                 index = i;
 453                                 break;
 454                         }
 455
 456         if (unlikely(index == IWL_INVALID_STATION))
 457                 goto out;
 458
 459         if (priv->stations[index].used) {
 460                 priv->stations[index].used = 0;
 461                 priv->num_stations--;
 462         }
 463
 464         BUG_ON(priv->num_stations < 0);
 465
 466 out:
 467         spin_unlock_irqrestore(&priv->sta_lock, flags);
 468         return 0;
 469 }
 470 #endif
 471
 472 /**
 473  * iwl3945_clear_stations_table - Clear the driver's station table
 474  *
 475  * NOTE:  This does not clear or otherwise alter the device's station table.
 476  */
 477 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 478 {
 479         unsigned long flags;
 480
 481         spin_lock_irqsave(&priv->sta_lock, flags);
 482
 483         priv->num_stations = 0;
 484         memset(priv->stations, 0, sizeof(priv->stations));
 485
 486         spin_unlock_irqrestore(&priv->sta_lock, flags);
 487 }
 488
 489 /**
 490  * iwl3945_add_station - Add station to station tables in driver and device
 491  */
 492 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 493 {
 494         int i;
 495         int index = IWL_INVALID_STATION;
 496         struct iwl3945_station_entry *station;
 497         unsigned long flags_spin;
 498         DECLARE_MAC_BUF(mac);
 499         u8 rate;
 500
 501         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 502         if (is_ap)
 503                 index = IWL_AP_ID;
 504         else if (is_broadcast_ether_addr(addr))
 505                 index = priv->hw_setting.bcast_sta_id;
 506         else
 507                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 508                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 509                                                 addr)) {
 510                                 index = i;
 511                                 break;
 512                         }
 513
 514                         if (!priv->stations[i].used &&
 515                             index == IWL_INVALID_STATION)
 516                                 index = i;
 517                 }
 518
 519         /* These two conditions has the same outcome but keep them separate
 520           since they have different meaning */
 521         if (unlikely(index == IWL_INVALID_STATION)) {
 522                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 523                 return index;
 524         }
 525
 526         if (priv->stations[index].used &&
 527            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 528                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 529                 return index;
 530         }
 531
 532         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 533         station = &priv->stations[index];
 534         station->used = 1;
 535         priv->num_stations++;
 536
 537         /* Set up the REPLY_ADD_STA command to send to device */
 538         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 539         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 540         station->sta.mode = 0;
 541         station->sta.sta.sta_id = index;
 542         station->sta.station_flags = 0;
 543
 544         if (priv->band == IEEE80211_BAND_5GHZ)
 545                 rate = IWL_RATE_6M_PLCP;
 546         else
 547                 rate =  IWL_RATE_1M_PLCP;
 548
 549         /* Turn on both antennas for the station... */
 550         station->sta.rate_n_flags =
 551                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 552         station->current_rate.rate_n_flags =
 553                         le16_to_cpu(station->sta.rate_n_flags);
 554
 555         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 556
 557         /* Add station to device's station table */
 558         iwl3945_send_add_station(priv, &station->sta, flags);
 559         return index;
 560
 561 }
 562
 563 /*************** DRIVER STATUS FUNCTIONS   *****/
 564
 565 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 566 {
 567         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 568          * set but EXIT_PENDING is not */
 569         return test_bit(STATUS_READY, &priv->status) &&
 570                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 571                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 572 }
 573
 574 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 575 {
 576         return test_bit(STATUS_ALIVE, &priv->status);
 577 }
 578
 579 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 580 {
 581         return test_bit(STATUS_INIT, &priv->status);
 582 }
 583
 584 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 585 {
 586         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 587                test_bit(STATUS_RF_KILL_SW, &priv->status);
 588 }
 589
 590 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 591 {
 592
 593         if (iwl3945_is_rfkill(priv))
 594                 return 0;
 595
 596         return iwl3945_is_ready(priv);
 597 }
 598
 599 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 600
 601 #define IWL_CMD(x) case x : return #x
 602
 603 static const char *get_cmd_string(u8 cmd)
 604 {
 605         switch (cmd) {
 606                 IWL_CMD(REPLY_ALIVE);
 607                 IWL_CMD(REPLY_ERROR);
 608                 IWL_CMD(REPLY_RXON);
 609                 IWL_CMD(REPLY_RXON_ASSOC);
 610                 IWL_CMD(REPLY_QOS_PARAM);
 611                 IWL_CMD(REPLY_RXON_TIMING);
 612                 IWL_CMD(REPLY_ADD_STA);
 613                 IWL_CMD(REPLY_REMOVE_STA);
 614                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 615                 IWL_CMD(REPLY_3945_RX);
 616                 IWL_CMD(REPLY_TX);
 617                 IWL_CMD(REPLY_RATE_SCALE);
 618                 IWL_CMD(REPLY_LEDS_CMD);
 619                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 620                 IWL_CMD(RADAR_NOTIFICATION);
 621                 IWL_CMD(REPLY_QUIET_CMD);
 622                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 623                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 624                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 625                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 626                 IWL_CMD(POWER_TABLE_CMD);
 627                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 628                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 629                 IWL_CMD(REPLY_SCAN_CMD);
 630                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 631                 IWL_CMD(SCAN_START_NOTIFICATION);
 632                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 633                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 634                 IWL_CMD(BEACON_NOTIFICATION);
 635                 IWL_CMD(REPLY_TX_BEACON);
 636                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 637                 IWL_CMD(QUIET_NOTIFICATION);
 638                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 639                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 640                 IWL_CMD(REPLY_BT_CONFIG);
 641                 IWL_CMD(REPLY_STATISTICS_CMD);
 642                 IWL_CMD(STATISTICS_NOTIFICATION);
 643                 IWL_CMD(REPLY_CARD_STATE_CMD);
 644                 IWL_CMD(CARD_STATE_NOTIFICATION);
 645                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 646         default:
 647                 return "UNKNOWN";
 648
 649         }
 650 }
 651
 652 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 653
 654 /**
 655  * iwl3945_enqueue_hcmd - enqueue a uCode command
 656  * @priv: device private data point
 657  * @cmd: a point to the ucode command structure
 658  *
 659  * The function returns < 0 values to indicate the operation is
 660  * failed. On success, it turns the index (> 0) of command in the
 661  * command queue.
 662  */
 663 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 664 {
 665         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 666         struct iwl3945_queue *q = &txq->q;
 667         struct iwl3945_tfd_frame *tfd;
 668         u32 *control_flags;
 669         struct iwl3945_cmd *out_cmd;
 670         u32 idx;
 671         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 672         dma_addr_t phys_addr;
 673         int pad;
 674         u16 count;
 675         int ret;
 676         unsigned long flags;
 677
 678         /* If any of the command structures end up being larger than
 679          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 680          * we will need to increase the size of the TFD entries */
 681         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 682                !(cmd->meta.flags & CMD_SIZE_HUGE));
 683
 684
 685         if (iwl3945_is_rfkill(priv)) {
 686                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 687                 return -EIO;
 688         }
 689
 690         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 691                 IWL_ERROR("No space for Tx\n");
 692                 return -ENOSPC;
 693         }
 694
 695         spin_lock_irqsave(&priv->hcmd_lock, flags);
 696
 697         tfd = &txq->bd[q->write_ptr];
 698         memset(tfd, 0, sizeof(*tfd));
 699
 700         control_flags = (u32 *) tfd;
 701
 702         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 703         out_cmd = &txq->cmd[idx];
 704
 705         out_cmd->hdr.cmd = cmd->id;
 706         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 707         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 708
 709         /* At this point, the out_cmd now has all of the incoming cmd
 710          * information */
 711
 712         out_cmd->hdr.flags = 0;
 713         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 714                         INDEX_TO_SEQ(q->write_ptr));
 715         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 716                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 717
 718         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 719                         offsetof(struct iwl3945_cmd, hdr);
 720         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 721
 722         pad = U32_PAD(cmd->len);
 723         count = TFD_CTL_COUNT_GET(*control_flags);
 724         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 725
 726         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 727                      "%d bytes at %d[%d]:%d\n",
 728                      get_cmd_string(out_cmd->hdr.cmd),
 729                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 730                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 731
 732         txq->need_update = 1;
 733
 734         /* Increment and update queue's write index */
 735         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
 736         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 737
 738         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 739         return ret ? ret : idx;
 740 }
 741
 742 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 743 {
 744         int ret;
 745
 746         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 747
 748         /* An asynchronous command can not expect an SKB to be set. */
 749         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 750
 751         /* An asynchronous command MUST have a callback. */
 752         BUG_ON(!cmd->meta.u.callback);
 753
 754         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 755                 return -EBUSY;
 756
 757         ret = iwl3945_enqueue_hcmd(priv, cmd);
 758         if (ret < 0) {
 759                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 760                           get_cmd_string(cmd->id), ret);
 761                 return ret;
 762         }
 763         return 0;
 764 }
 765
 766 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 767 {
 768         int cmd_idx;
 769         int ret;
 770         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 771
 772         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 773
 774          /* A synchronous command can not have a callback set. */
 775         BUG_ON(cmd->meta.u.callback != NULL);
 776
 777         if (atomic_xchg(&entry, 1)) {
 778                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 779                           get_cmd_string(cmd->id));
 780                 return -EBUSY;
 781         }
 782
 783         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 784
 785         if (cmd->meta.flags & CMD_WANT_SKB)
 786                 cmd->meta.source = &cmd->meta;
 787
 788         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 789         if (cmd_idx < 0) {
 790                 ret = cmd_idx;
 791                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 792                           get_cmd_string(cmd->id), ret);
 793                 goto out;
 794         }
 795
 796         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 797                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 798                         HOST_COMPLETE_TIMEOUT);
 799         if (!ret) {
 800                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 801                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 802                                   get_cmd_string(cmd->id),
 803                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 804
 805                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 806                         ret = -ETIMEDOUT;
 807                         goto cancel;
 808                 }
 809         }
 810
 811         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 812                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 813                                get_cmd_string(cmd->id));
 814                 ret = -ECANCELED;
 815                 goto fail;
 816         }
 817         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 818                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 819                                get_cmd_string(cmd->id));
 820                 ret = -EIO;
 821                 goto fail;
 822         }
 823         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 824                 IWL_ERROR("Error: Response NULL in '%s'\n",
 825                           get_cmd_string(cmd->id));
 826                 ret = -EIO;
 827                 goto out;
 828         }
 829
 830         ret = 0;
 831         goto out;
 832
 833 cancel:
 834         if (cmd->meta.flags & CMD_WANT_SKB) {
 835                 struct iwl3945_cmd *qcmd;
 836
 837                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 838                  * TX cmd queue. Otherwise in case the cmd comes
 839                  * in later, it will possibly set an invalid
 840                  * address (cmd->meta.source). */
 841                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 842                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 843         }
 844 fail:
 845         if (cmd->meta.u.skb) {
 846                 dev_kfree_skb_any(cmd->meta.u.skb);
 847                 cmd->meta.u.skb = NULL;
 848         }
 849 out:
 850         atomic_set(&entry, 0);
 851         return ret;
 852 }
 853
 854 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 855 {
 856         if (cmd->meta.flags & CMD_ASYNC)
 857                 return iwl3945_send_cmd_async(priv, cmd);
 858
 859         return iwl3945_send_cmd_sync(priv, cmd);
 860 }
 861
 862 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 863 {
 864         struct iwl3945_host_cmd cmd = {
 865                 .id = id,
 866                 .len = len,
 867                 .data = data,
 868         };
 869
 870         return iwl3945_send_cmd_sync(priv, &cmd);
 871 }
 872
 873 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 874 {
 875         struct iwl3945_host_cmd cmd = {
 876                 .id = id,
 877                 .len = sizeof(val),
 878                 .data = &val,
 879         };
 880
 881         return iwl3945_send_cmd_sync(priv, &cmd);
 882 }
 883
 884 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 885 {
 886         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 887 }
 888
 889 /**
 890  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 891  * @band: 2.4 or 5 GHz band
 892  * @channel: Any channel valid for the requested band
 893
 894  * In addition to setting the staging RXON, priv->band is also set.
 895  *
 896  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 897  * in the staging RXON flag structure based on the band
 898  */
 899 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 900                                     enum ieee80211_band band,
 901                                     u16 channel)
 902 {
 903         if (!iwl3945_get_channel_info(priv, band, channel)) {
 904                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 905                                channel, band);
 906                 return -EINVAL;
 907         }
 908
 909         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 910             (priv->band == band))
 911                 return 0;
 912
 913         priv->staging_rxon.channel = cpu_to_le16(channel);
 914         if (band == IEEE80211_BAND_5GHZ)
 915                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 916         else
 917                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 918
 919         priv->band = band;
 920
 921         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 922
 923         return 0;
 924 }
 925
 926 /**
 927  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 928  *
 929  * NOTE:  This is really only useful during development and can eventually
 930  * be #ifdef'd out once the driver is stable and folks aren't actively
 931  * making changes
 932  */
 933 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 934 {
 935         int error = 0;
 936         int counter = 1;
 937
 938         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 939                 error |= le32_to_cpu(rxon->flags &
 940                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 941                                  RXON_FLG_RADAR_DETECT_MSK));
 942                 if (error)
 943                         IWL_WARNING("check 24G fields %d | %d\n",
 944                                     counter++, error);
 945         } else {
 946                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 947                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 948                 if (error)
 949                         IWL_WARNING("check 52 fields %d | %d\n",
 950                                     counter++, error);
 951                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 952                 if (error)
 953                         IWL_WARNING("check 52 CCK %d | %d\n",
 954                                     counter++, error);
 955         }
 956         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 957         if (error)
 958                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 959
 960         /* make sure basic rates 6Mbps and 1Mbps are supported */
 961         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 962                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 963         if (error)
 964                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 965
 966         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 967         if (error)
 968                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 969
 970         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 971                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 972         if (error)
 973                 IWL_WARNING("check CCK and short slot %d | %d\n",
 974                             counter++, error);
 975
 976         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 977                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 978         if (error)
 979                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 980                             counter++, error);
 981
 982         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 983                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 984         if (error)
 985                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 986                             counter++, error);
 987
 988         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 989                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 990                                 RXON_FLG_ANT_A_MSK)) == 0);
 991         if (error)
 992                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 993
 994         if (error)
 995                 IWL_WARNING("Tuning to channel %d\n",
 996                             le16_to_cpu(rxon->channel));
 997
 998         if (error) {
 999                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
1000                 return -1;
1001         }
1002         return 0;
1003 }
1004
1005 /**
1006  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1007  * @priv: staging_rxon is compared to active_rxon
1008  *
1009  * If the RXON structure is changing enough to require a new tune,
1010  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1011  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1012  */
1013 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
1014 {
1015
1016         /* These items are only settable from the full RXON command */
1017         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1018             compare_ether_addr(priv->staging_rxon.bssid_addr,
1019                                priv->active_rxon.bssid_addr) ||
1020             compare_ether_addr(priv->staging_rxon.node_addr,
1021                                priv->active_rxon.node_addr) ||
1022             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1023                                priv->active_rxon.wlap_bssid_addr) ||
1024             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1025             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1026             (priv->staging_rxon.air_propagation !=
1027              priv->active_rxon.air_propagation) ||
1028             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1029                 return 1;
1030
1031         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1032          * be updated with the RXON_ASSOC command -- however only some
1033          * flag transitions are allowed using RXON_ASSOC */
1034
1035         /* Check if we are not switching bands */
1036         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1037             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1038                 return 1;
1039
1040         /* Check if we are switching association toggle */
1041         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1042                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1043                 return 1;
1044
1045         return 0;
1046 }
1047
1048 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1049 {
1050         int rc = 0;
1051         struct iwl3945_rx_packet *res = NULL;
1052         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1053         struct iwl3945_host_cmd cmd = {
1054                 .id = REPLY_RXON_ASSOC,
1055                 .len = sizeof(rxon_assoc),
1056                 .meta.flags = CMD_WANT_SKB,
1057                 .data = &rxon_assoc,
1058         };
1059         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1060         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1061
1062         if ((rxon1->flags == rxon2->flags) &&
1063             (rxon1->filter_flags == rxon2->filter_flags) &&
1064             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1065             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1066                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1067                 return 0;
1068         }
1069
1070         rxon_assoc.flags = priv->staging_rxon.flags;
1071         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1072         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1073         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1074         rxon_assoc.reserved = 0;
1075
1076         rc = iwl3945_send_cmd_sync(priv, &cmd);
1077         if (rc)
1078                 return rc;
1079
1080         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1081         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1082                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1083                 rc = -EIO;
1084         }
1085
1086         priv->alloc_rxb_skb--;
1087         dev_kfree_skb_any(cmd.meta.u.skb);
1088
1089         return rc;
1090 }
1091
1092 /**
1093  * iwl3945_commit_rxon - commit staging_rxon to hardware
1094  *
1095  * The RXON command in staging_rxon is committed to the hardware and
1096  * the active_rxon structure is updated with the new data.  This
1097  * function correctly transitions out of the RXON_ASSOC_MSK state if
1098  * a HW tune is required based on the RXON structure changes.
1099  */
1100 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1101 {
1102         /* cast away the const for active_rxon in this function */
1103         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1104         int rc = 0;
1105         DECLARE_MAC_BUF(mac);
1106
1107         if (!iwl3945_is_alive(priv))
1108                 return -1;
1109
1110         /* always get timestamp with Rx frame */
1111         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1112
1113         /* select antenna */
1114         priv->staging_rxon.flags &=
1115             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1116         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1117
1118         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1119         if (rc) {
1120                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1121                 return -EINVAL;
1122         }
1123
1124         /* If we don't need to send a full RXON, we can use
1125          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1126          * and other flags for the current radio configuration. */
1127         if (!iwl3945_full_rxon_required(priv)) {
1128                 rc = iwl3945_send_rxon_assoc(priv);
1129                 if (rc) {
1130                         IWL_ERROR("Error setting RXON_ASSOC "
1131                                   "configuration (%d).\n", rc);
1132                         return rc;
1133                 }
1134
1135                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1136
1137                 return 0;
1138         }
1139
1140         /* If we are currently associated and the new config requires
1141          * an RXON_ASSOC and the new config wants the associated mask enabled,
1142          * we must clear the associated from the active configuration
1143          * before we apply the new config */
1144         if (iwl3945_is_associated(priv) &&
1145             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1146                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1147                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1148
1149                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1150                                       sizeof(struct iwl3945_rxon_cmd),
1151                                       &priv->active_rxon);
1152
1153                 /* If the mask clearing failed then we set
1154                  * active_rxon back to what it was previously */
1155                 if (rc) {
1156                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1157                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1158                                   "configuration (%d).\n", rc);
1159                         return rc;
1160                 }
1161         }
1162
1163         IWL_DEBUG_INFO("Sending RXON\n"
1164                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1165                        "* channel = %d\n"
1166                        "* bssid = %s\n",
1167                        ((priv->staging_rxon.filter_flags &
1168                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1169                        le16_to_cpu(priv->staging_rxon.channel),
1170                        print_mac(mac, priv->staging_rxon.bssid_addr));
1171
1172         /* Apply the new configuration */
1173         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1174                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1175         if (rc) {
1176                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1177                 return rc;
1178         }
1179
1180         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1181
1182         iwl3945_clear_stations_table(priv);
1183
1184         /* If we issue a new RXON command which required a tune then we must
1185          * send a new TXPOWER command or we won't be able to Tx any frames */
1186         rc = iwl3945_hw_reg_send_txpower(priv);
1187         if (rc) {
1188                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1189                 return rc;
1190         }
1191
1192         /* Add the broadcast address so we can send broadcast frames */
1193         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1194             IWL_INVALID_STATION) {
1195                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1196                 return -EIO;
1197         }
1198
1199         /* If we have set the ASSOC_MSK and we are in BSS mode then
1200          * add the IWL_AP_ID to the station rate table */
1201         if (iwl3945_is_associated(priv) &&
1202             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1203                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1204                     == IWL_INVALID_STATION) {
1205                         IWL_ERROR("Error adding AP address for transmit.\n");
1206                         return -EIO;
1207                 }
1208
1209         /* Init the hardware's rate fallback order based on the band */
1210         rc = iwl3945_init_hw_rate_table(priv);
1211         if (rc) {
1212                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1213                 return -EIO;
1214         }
1215
1216         return 0;
1217 }
1218
1219 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1220 {
1221         struct iwl3945_bt_cmd bt_cmd = {
1222                 .flags = 3,
1223                 .lead_time = 0xAA,
1224                 .max_kill = 1,
1225                 .kill_ack_mask = 0,
1226                 .kill_cts_mask = 0,
1227         };
1228
1229         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1230                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1231 }
1232
1233 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1234 {
1235         int rc = 0;
1236         struct iwl3945_rx_packet *res;
1237         struct iwl3945_host_cmd cmd = {
1238                 .id = REPLY_SCAN_ABORT_CMD,
1239                 .meta.flags = CMD_WANT_SKB,
1240         };
1241
1242         /* If there isn't a scan actively going on in the hardware
1243          * then we are in between scan bands and not actually
1244          * actively scanning, so don't send the abort command */
1245         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1246                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1247                 return 0;
1248         }
1249
1250         rc = iwl3945_send_cmd_sync(priv, &cmd);
1251         if (rc) {
1252                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1253                 return rc;
1254         }
1255
1256         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1257         if (res->u.status != CAN_ABORT_STATUS) {
1258                 /* The scan abort will return 1 for success or
1259                  * 2 for "failure".  A failure condition can be
1260                  * due to simply not being in an active scan which
1261                  * can occur if we send the scan abort before we
1262                  * the microcode has notified us that a scan is
1263                  * completed. */
1264                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1265                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1266                 clear_bit(STATUS_SCAN_HW, &priv->status);
1267         }
1268
1269         dev_kfree_skb_any(cmd.meta.u.skb);
1270
1271         return rc;
1272 }
1273
1274 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1275                                         struct iwl3945_cmd *cmd,
1276                                         struct sk_buff *skb)
1277 {
1278         return 1;
1279 }
1280
1281 /*
1282  * CARD_STATE_CMD
1283  *
1284  * Use: Sets the device's internal card state to enable, disable, or halt
1285  *
1286  * When in the 'enable' state the card operates as normal.
1287  * When in the 'disable' state, the card enters into a low power mode.
1288  * When in the 'halt' state, the card is shut down and must be fully
1289  * restarted to come back on.
1290  */
1291 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1292 {
1293         struct iwl3945_host_cmd cmd = {
1294                 .id = REPLY_CARD_STATE_CMD,
1295                 .len = sizeof(u32),
1296                 .data = &flags,
1297                 .meta.flags = meta_flag,
1298         };
1299
1300         if (meta_flag & CMD_ASYNC)
1301                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1302
1303         return iwl3945_send_cmd(priv, &cmd);
1304 }
1305
1306 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1307                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1308 {
1309         struct iwl3945_rx_packet *res = NULL;
1310
1311         if (!skb) {
1312                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1313                 return 1;
1314         }
1315
1316         res = (struct iwl3945_rx_packet *)skb->data;
1317         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1318                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1319                           res->hdr.flags);
1320                 return 1;
1321         }
1322
1323         switch (res->u.add_sta.status) {
1324         case ADD_STA_SUCCESS_MSK:
1325                 break;
1326         default:
1327                 break;
1328         }
1329
1330         /* We didn't cache the SKB; let the caller free it */
1331         return 1;
1332 }
1333
1334 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1335                          struct iwl3945_addsta_cmd *sta, u8 flags)
1336 {
1337         struct iwl3945_rx_packet *res = NULL;
1338         int rc = 0;
1339         struct iwl3945_host_cmd cmd = {
1340                 .id = REPLY_ADD_STA,
1341                 .len = sizeof(struct iwl3945_addsta_cmd),
1342                 .meta.flags = flags,
1343                 .data = sta,
1344         };
1345
1346         if (flags & CMD_ASYNC)
1347                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1348         else
1349                 cmd.meta.flags |= CMD_WANT_SKB;
1350
1351         rc = iwl3945_send_cmd(priv, &cmd);
1352
1353         if (rc || (flags & CMD_ASYNC))
1354                 return rc;
1355
1356         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1357         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1358                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1359                           res->hdr.flags);
1360                 rc = -EIO;
1361         }
1362
1363         if (rc == 0) {
1364                 switch (res->u.add_sta.status) {
1365                 case ADD_STA_SUCCESS_MSK:
1366                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1367                         break;
1368                 default:
1369                         rc = -EIO;
1370                         IWL_WARNING("REPLY_ADD_STA failed\n");
1371                         break;
1372                 }
1373         }
1374
1375         priv->alloc_rxb_skb--;
1376         dev_kfree_skb_any(cmd.meta.u.skb);
1377
1378         return rc;
1379 }
1380
1381 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1382                                    struct ieee80211_key_conf *keyconf,
1383                                    u8 sta_id)
1384 {
1385         unsigned long flags;
1386         __le16 key_flags = 0;
1387
1388         switch (keyconf->alg) {
1389         case ALG_CCMP:
1390                 key_flags |= STA_KEY_FLG_CCMP;
1391                 key_flags |= cpu_to_le16(
1392                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1393                 key_flags &= ~STA_KEY_FLG_INVALID;
1394                 break;
1395         case ALG_TKIP:
1396         case ALG_WEP:
1397         default:
1398                 return -EINVAL;
1399         }
1400         spin_lock_irqsave(&priv->sta_lock, flags);
1401         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1402         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1403         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1404                keyconf->keylen);
1405
1406         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1407                keyconf->keylen);
1408         priv->stations[sta_id].sta.key.key_flags = key_flags;
1409         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1410         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1411
1412         spin_unlock_irqrestore(&priv->sta_lock, flags);
1413
1414         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1415         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1416         return 0;
1417 }
1418
1419 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1420 {
1421         unsigned long flags;
1422
1423         spin_lock_irqsave(&priv->sta_lock, flags);
1424         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1425         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1426         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1427         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1428         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1429         spin_unlock_irqrestore(&priv->sta_lock, flags);
1430
1431         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1432         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1433         return 0;
1434 }
1435
1436 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1437 {
1438         struct list_head *element;
1439
1440         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1441                        priv->frames_count);
1442
1443         while (!list_empty(&priv->free_frames)) {
1444                 element = priv->free_frames.next;
1445                 list_del(element);
1446                 kfree(list_entry(element, struct iwl3945_frame, list));
1447                 priv->frames_count--;
1448         }
1449
1450         if (priv->frames_count) {
1451                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1452                             priv->frames_count);
1453                 priv->frames_count = 0;
1454         }
1455 }
1456
1457 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1458 {
1459         struct iwl3945_frame *frame;
1460         struct list_head *element;
1461         if (list_empty(&priv->free_frames)) {
1462                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1463                 if (!frame) {
1464                         IWL_ERROR("Could not allocate frame!\n");
1465                         return NULL;
1466                 }
1467
1468                 priv->frames_count++;
1469                 return frame;
1470         }
1471
1472         element = priv->free_frames.next;
1473         list_del(element);
1474         return list_entry(element, struct iwl3945_frame, list);
1475 }
1476
1477 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1478 {
1479         memset(frame, 0, sizeof(*frame));
1480         list_add(&frame->list, &priv->free_frames);
1481 }
1482
1483 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1484                                 struct ieee80211_hdr *hdr,
1485                                 const u8 *dest, int left)
1486 {
1487
1488         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1489             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1490              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1491                 return 0;
1492
1493         if (priv->ibss_beacon->len > left)
1494                 return 0;
1495
1496         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1497
1498         return priv->ibss_beacon->len;
1499 }
1500
1501 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1502 {
1503         u8 i;
1504
1505         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1506              i = iwl3945_rates[i].next_ieee) {
1507                 if (rate_mask & (1 << i))
1508                         return iwl3945_rates[i].plcp;
1509         }
1510
1511         return IWL_RATE_INVALID;
1512 }
1513
1514 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1515 {
1516         struct iwl3945_frame *frame;
1517         unsigned int frame_size;
1518         int rc;
1519         u8 rate;
1520
1521         frame = iwl3945_get_free_frame(priv);
1522
1523         if (!frame) {
1524                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1525                           "command.\n");
1526                 return -ENOMEM;
1527         }
1528
1529         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1530                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1531                                                 0xFF0);
1532                 if (rate == IWL_INVALID_RATE)
1533                         rate = IWL_RATE_6M_PLCP;
1534         } else {
1535                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1536                 if (rate == IWL_INVALID_RATE)
1537                         rate = IWL_RATE_1M_PLCP;
1538         }
1539
1540         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1541
1542         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1543                               &frame->u.cmd[0]);
1544
1545         iwl3945_free_frame(priv, frame);
1546
1547         return rc;
1548 }
1549
1550 /******************************************************************************
1551  *
1552  * EEPROM related functions
1553  *
1554  ******************************************************************************/
1555
1556 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1557 {
1558         memcpy(mac, priv->eeprom.mac_address, 6);
1559 }
1560
1561 /*
1562  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1563  * embedded controller) as EEPROM reader; each read is a series of pulses
1564  * to/from the EEPROM chip, not a single event, so even reads could conflict
1565  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1566  * simply claims ownership, which should be safe when this function is called
1567  * (i.e. before loading uCode!).
1568  */
1569 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1570 {
1571         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1572         return 0;
1573 }
1574
1575 /**
1576  * iwl3945_eeprom_init - read EEPROM contents
1577  *
1578  * Load the EEPROM contents from adapter into priv->eeprom
1579  *
1580  * NOTE:  This routine uses the non-debug IO access functions.
1581  */
1582 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1583 {
1584         u16 *e = (u16 *)&priv->eeprom;
1585         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1586         u32 r;
1587         int sz = sizeof(priv->eeprom);
1588         int rc;
1589         int i;
1590         u16 addr;
1591
1592         /* The EEPROM structure has several padding buffers within it
1593          * and when adding new EEPROM maps is subject to programmer errors
1594          * which may be very difficult to identify without explicitly
1595          * checking the resulting size of the eeprom map. */
1596         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1597
1598         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1599                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1600                 return -ENOENT;
1601         }
1602
1603         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1604         rc = iwl3945_eeprom_acquire_semaphore(priv);
1605         if (rc < 0) {
1606                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1607                 return -ENOENT;
1608         }
1609
1610         /* eeprom is an array of 16bit values */
1611         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1612                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1613                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1614
1615                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1616                                         i += IWL_EEPROM_ACCESS_DELAY) {
1617                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1618                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1619                                 break;
1620                         udelay(IWL_EEPROM_ACCESS_DELAY);
1621                 }
1622
1623                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1624                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1625                         return -ETIMEDOUT;
1626                 }
1627                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1628         }
1629
1630         return 0;
1631 }
1632
1633 /******************************************************************************
1634  *
1635  * Misc. internal state and helper functions
1636  *
1637  ******************************************************************************/
1638 #ifdef CONFIG_IWL3945_DEBUG
1639
1640 /**
1641  * iwl3945_report_frame - dump frame to syslog during debug sessions
1642  *
1643  * You may hack this function to show different aspects of received frames,
1644  * including selective frame dumps.
1645  * group100 parameter selects whether to show 1 out of 100 good frames.
1646  */
1647 void iwl3945_report_frame(struct iwl3945_priv *priv,
1648                       struct iwl3945_rx_packet *pkt,
1649                       struct ieee80211_hdr *header, int group100)
1650 {
1651         u32 to_us;
1652         u32 print_summary = 0;
1653         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1654         u32 hundred = 0;
1655         u32 dataframe = 0;
1656         u16 fc;
1657         u16 seq_ctl;
1658         u16 channel;
1659         u16 phy_flags;
1660         int rate_sym;
1661         u16 length;
1662         u16 status;
1663         u16 bcn_tmr;
1664         u32 tsf_low;
1665         u64 tsf;
1666         u8 rssi;
1667         u8 agc;
1668         u16 sig_avg;
1669         u16 noise_diff;
1670         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1671         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1672         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
1673         u8 *data = IWL_RX_DATA(pkt);
1674
1675         /* MAC header */
1676         fc = le16_to_cpu(header->frame_control);
1677         seq_ctl = le16_to_cpu(header->seq_ctrl);
1678
1679         /* metadata */
1680         channel = le16_to_cpu(rx_hdr->channel);
1681         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1682         rate_sym = rx_hdr->rate;
1683         length = le16_to_cpu(rx_hdr->len);
1684
1685         /* end-of-frame status and timestamp */
1686         status = le32_to_cpu(rx_end->status);
1687         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1688         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1689         tsf = le64_to_cpu(rx_end->timestamp);
1690
1691         /* signal statistics */
1692         rssi = rx_stats->rssi;
1693         agc = rx_stats->agc;
1694         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1695         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1696
1697         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1698
1699         /* if data frame is to us and all is good,
1700          *   (optionally) print summary for only 1 out of every 100 */
1701         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1702             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1703                 dataframe = 1;
1704                 if (!group100)
1705                         print_summary = 1;      /* print each frame */
1706                 else if (priv->framecnt_to_us < 100) {
1707                         priv->framecnt_to_us++;
1708                         print_summary = 0;
1709                 } else {
1710                         priv->framecnt_to_us = 0;
1711                         print_summary = 1;
1712                         hundred = 1;
1713                 }
1714         } else {
1715                 /* print summary for all other frames */
1716                 print_summary = 1;
1717         }
1718
1719         if (print_summary) {
1720                 char *title;
1721                 u32 rate;
1722
1723                 if (hundred)
1724                         title = "100Frames";
1725                 else if (fc & IEEE80211_FCTL_RETRY)
1726                         title = "Retry";
1727                 else if (ieee80211_is_assoc_response(fc))
1728                         title = "AscRsp";
1729                 else if (ieee80211_is_reassoc_response(fc))
1730                         title = "RasRsp";
1731                 else if (ieee80211_is_probe_response(fc)) {
1732                         title = "PrbRsp";
1733                         print_dump = 1; /* dump frame contents */
1734                 } else if (ieee80211_is_beacon(fc)) {
1735                         title = "Beacon";
1736                         print_dump = 1; /* dump frame contents */
1737                 } else if (ieee80211_is_atim(fc))
1738                         title = "ATIM";
1739                 else if (ieee80211_is_auth(fc))
1740                         title = "Auth";
1741                 else if (ieee80211_is_deauth(fc))
1742                         title = "DeAuth";
1743                 else if (ieee80211_is_disassoc(fc))
1744                         title = "DisAssoc";
1745                 else
1746                         title = "Frame";
1747
1748                 rate = iwl3945_rate_index_from_plcp(rate_sym);
1749                 if (rate == -1)
1750                         rate = 0;
1751                 else
1752                         rate = iwl3945_rates[rate].ieee / 2;
1753
1754                 /* print frame summary.
1755                  * MAC addresses show just the last byte (for brevity),
1756                  *    but you can hack it to show more, if you'd like to. */
1757                 if (dataframe)
1758                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1759                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1760                                      title, fc, header->addr1[5],
1761                                      length, rssi, channel, rate);
1762                 else {
1763                         /* src/dst addresses assume managed mode */
1764                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1765                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1766                                      "phy=0x%02x, chnl=%d\n",
1767                                      title, fc, header->addr1[5],
1768                                      header->addr3[5], rssi,
1769                                      tsf_low - priv->scan_start_tsf,
1770                                      phy_flags, channel);
1771                 }
1772         }
1773         if (print_dump)
1774                 iwl3945_print_hex_dump(IWL_DL_RX, data, length);
1775 }
1776 #endif
1777
1778 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1779 {
1780         if (priv->hw_setting.shared_virt)
1781                 pci_free_consistent(priv->pci_dev,
1782                                     sizeof(struct iwl3945_shared),
1783                                     priv->hw_setting.shared_virt,
1784                                     priv->hw_setting.shared_phys);
1785 }
1786
1787 /**
1788  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1789  *
1790  * return : set the bit for each supported rate insert in ie
1791  */
1792 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1793                                     u16 basic_rate, int *left)
1794 {
1795         u16 ret_rates = 0, bit;
1796         int i;
1797         u8 *cnt = ie;
1798         u8 *rates = ie + 1;
1799
1800         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1801                 if (bit & supported_rate) {
1802                         ret_rates |= bit;
1803                         rates[*cnt] = iwl3945_rates[i].ieee |
1804                                 ((bit & basic_rate) ? 0x80 : 0x00);
1805                         (*cnt)++;
1806                         (*left)--;
1807                         if ((*left <= 0) ||
1808                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1809                                 break;
1810                 }
1811         }
1812
1813         return ret_rates;
1814 }
1815
1816 /**
1817  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1818  */
1819 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1820                               struct ieee80211_mgmt *frame,
1821                               int left, int is_direct)
1822 {
1823         int len = 0;
1824         u8 *pos = NULL;
1825         u16 active_rates, ret_rates, cck_rates;
1826
1827         /* Make sure there is enough space for the probe request,
1828          * two mandatory IEs and the data */
1829         left -= 24;
1830         if (left < 0)
1831                 return 0;
1832         len += 24;
1833
1834         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1835         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1836         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1837         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1838         frame->seq_ctrl = 0;
1839
1840         /* fill in our indirect SSID IE */
1841         /* ...next IE... */
1842
1843         left -= 2;
1844         if (left < 0)
1845                 return 0;
1846         len += 2;
1847         pos = &(frame->u.probe_req.variable[0]);
1848         *pos++ = WLAN_EID_SSID;
1849         *pos++ = 0;
1850
1851         /* fill in our direct SSID IE... */
1852         if (is_direct) {
1853                 /* ...next IE... */
1854                 left -= 2 + priv->essid_len;
1855                 if (left < 0)
1856                         return 0;
1857                 /* ... fill it in... */
1858                 *pos++ = WLAN_EID_SSID;
1859                 *pos++ = priv->essid_len;
1860                 memcpy(pos, priv->essid, priv->essid_len);
1861                 pos += priv->essid_len;
1862                 len += 2 + priv->essid_len;
1863         }
1864
1865         /* fill in supported rate */
1866         /* ...next IE... */
1867         left -= 2;
1868         if (left < 0)
1869                 return 0;
1870
1871         /* ... fill it in... */
1872         *pos++ = WLAN_EID_SUPP_RATES;
1873         *pos = 0;
1874
1875         priv->active_rate = priv->rates_mask;
1876         active_rates = priv->active_rate;
1877         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1878
1879         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1880         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1881                         priv->active_rate_basic, &left);
1882         active_rates &= ~ret_rates;
1883
1884         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1885                                  priv->active_rate_basic, &left);
1886         active_rates &= ~ret_rates;
1887
1888         len += 2 + *pos;
1889         pos += (*pos) + 1;
1890         if (active_rates == 0)
1891                 goto fill_end;
1892
1893         /* fill in supported extended rate */
1894         /* ...next IE... */
1895         left -= 2;
1896         if (left < 0)
1897                 return 0;
1898         /* ... fill it in... */
1899         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1900         *pos = 0;
1901         iwl3945_supported_rate_to_ie(pos, active_rates,
1902                                  priv->active_rate_basic, &left);
1903         if (*pos > 0)
1904                 len += 2 + *pos;
1905
1906  fill_end:
1907         return (u16)len;
1908 }
1909
1910 /*
1911  * QoS  support
1912 */
1913 #ifdef CONFIG_IWL3945_QOS
1914 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1915                                        struct iwl3945_qosparam_cmd *qos)
1916 {
1917
1918         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1919                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1920 }
1921
1922 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1923 {
1924         u16 cw_min = 15;
1925         u16 cw_max = 1023;
1926         u8 aifs = 2;
1927         u8 is_legacy = 0;
1928         unsigned long flags;
1929         int i;
1930
1931         spin_lock_irqsave(&priv->lock, flags);
1932         priv->qos_data.qos_active = 0;
1933
1934         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1935                 if (priv->qos_data.qos_enable)
1936                         priv->qos_data.qos_active = 1;
1937                 if (!(priv->active_rate & 0xfff0)) {
1938                         cw_min = 31;
1939                         is_legacy = 1;
1940                 }
1941         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1942                 if (priv->qos_data.qos_enable)
1943                         priv->qos_data.qos_active = 1;
1944         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1945                 cw_min = 31;
1946                 is_legacy = 1;
1947         }
1948
1949         if (priv->qos_data.qos_active)
1950                 aifs = 3;
1951
1952         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1953         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1954         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1955         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1956         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1957
1958         if (priv->qos_data.qos_active) {
1959                 i = 1;
1960                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1961                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1962                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1963                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1964                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1965
1966                 i = 2;
1967                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1968                         cpu_to_le16((cw_min + 1) / 2 - 1);
1969                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1970                         cpu_to_le16(cw_max);
1971                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1972                 if (is_legacy)
1973                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1974                                 cpu_to_le16(6016);
1975                 else
1976                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1977                                 cpu_to_le16(3008);
1978                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1979
1980                 i = 3;
1981                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1982                         cpu_to_le16((cw_min + 1) / 4 - 1);
1983                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1984                         cpu_to_le16((cw_max + 1) / 2 - 1);
1985                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1986                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1987                 if (is_legacy)
1988                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1989                                 cpu_to_le16(3264);
1990                 else
1991                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1992                                 cpu_to_le16(1504);
1993         } else {
1994                 for (i = 1; i < 4; i++) {
1995                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1996                                 cpu_to_le16(cw_min);
1997                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1998                                 cpu_to_le16(cw_max);
1999                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2000                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2001                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2002                 }
2003         }
2004         IWL_DEBUG_QOS("set QoS to default \n");
2005
2006         spin_unlock_irqrestore(&priv->lock, flags);
2007 }
2008
2009 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
2010 {
2011         unsigned long flags;
2012
2013         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2014                 return;
2015
2016         if (!priv->qos_data.qos_enable)
2017                 return;
2018
2019         spin_lock_irqsave(&priv->lock, flags);
2020         priv->qos_data.def_qos_parm.qos_flags = 0;
2021
2022         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2023             !priv->qos_data.qos_cap.q_AP.txop_request)
2024                 priv->qos_data.def_qos_parm.qos_flags |=
2025                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2026
2027         if (priv->qos_data.qos_active)
2028                 priv->qos_data.def_qos_parm.qos_flags |=
2029                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2030
2031         spin_unlock_irqrestore(&priv->lock, flags);
2032
2033         if (force || iwl3945_is_associated(priv)) {
2034                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2035                               priv->qos_data.qos_active);
2036
2037                 iwl3945_send_qos_params_command(priv,
2038                                 &(priv->qos_data.def_qos_parm));
2039         }
2040 }
2041
2042 #endif /* CONFIG_IWL3945_QOS */
2043 /*
2044  * Power management (not Tx power!) functions
2045  */
2046 #define MSEC_TO_USEC 1024
2047
2048 #define NOSLP __constant_cpu_to_le32(0)
2049 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2050 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2051 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2052                                      __constant_cpu_to_le32(X1), \
2053                                      __constant_cpu_to_le32(X2), \
2054                                      __constant_cpu_to_le32(X3), \
2055                                      __constant_cpu_to_le32(X4)}
2056
2057
2058 /* default power management (not Tx power) table values */
2059 /* for tim  0-10 */
2060 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
2061         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2062         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2063         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2064         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2065         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2066         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2067 };
2068
2069 /* for tim > 10 */
2070 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
2071         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2072         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2073                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2074         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2075                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2076         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2077                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2078         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2079         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2080                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2081 };
2082
2083 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
2084 {
2085         int rc = 0, i;
2086         struct iwl3945_power_mgr *pow_data;
2087         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
2088         u16 pci_pm;
2089
2090         IWL_DEBUG_POWER("Initialize power \n");
2091
2092         pow_data = &(priv->power_data);
2093
2094         memset(pow_data, 0, sizeof(*pow_data));
2095
2096         pow_data->active_index = IWL_POWER_RANGE_0;
2097         pow_data->dtim_val = 0xffff;
2098
2099         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2100         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2101
2102         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2103         if (rc != 0)
2104                 return 0;
2105         else {
2106                 struct iwl3945_powertable_cmd *cmd;
2107
2108                 IWL_DEBUG_POWER("adjust power command flags\n");
2109
2110                 for (i = 0; i < IWL_POWER_AC; i++) {
2111                         cmd = &pow_data->pwr_range_0[i].cmd;
2112
2113                         if (pci_pm & 0x1)
2114                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2115                         else
2116                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2117                 }
2118         }
2119         return rc;
2120 }
2121
2122 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
2123                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
2124 {
2125         int rc = 0, i;
2126         u8 skip;
2127         u32 max_sleep = 0;
2128         struct iwl3945_power_vec_entry *range;
2129         u8 period = 0;
2130         struct iwl3945_power_mgr *pow_data;
2131
2132         if (mode > IWL_POWER_INDEX_5) {
2133                 IWL_DEBUG_POWER("Error invalid power mode \n");
2134                 return -1;
2135         }
2136         pow_data = &(priv->power_data);
2137
2138         if (pow_data->active_index == IWL_POWER_RANGE_0)
2139                 range = &pow_data->pwr_range_0[0];
2140         else
2141                 range = &pow_data->pwr_range_1[1];
2142
2143         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
2144
2145 #ifdef IWL_MAC80211_DISABLE
2146         if (priv->assoc_network != NULL) {
2147                 unsigned long flags;
2148
2149                 period = priv->assoc_network->tim.tim_period;
2150         }
2151 #endif  /*IWL_MAC80211_DISABLE */
2152         skip = range[mode].no_dtim;
2153
2154         if (period == 0) {
2155                 period = 1;
2156                 skip = 0;
2157         }
2158
2159         if (skip == 0) {
2160                 max_sleep = period;
2161                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2162         } else {
2163                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2164                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2165                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2166         }
2167
2168         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2169                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2170                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2171         }
2172
2173         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2174         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2175         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2176         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2177                         le32_to_cpu(cmd->sleep_interval[0]),
2178                         le32_to_cpu(cmd->sleep_interval[1]),
2179                         le32_to_cpu(cmd->sleep_interval[2]),
2180                         le32_to_cpu(cmd->sleep_interval[3]),
2181                         le32_to_cpu(cmd->sleep_interval[4]));
2182
2183         return rc;
2184 }
2185
2186 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2187 {
2188         u32 uninitialized_var(final_mode);
2189         int rc;
2190         struct iwl3945_powertable_cmd cmd;
2191
2192         /* If on battery, set to 3,
2193          * if plugged into AC power, set to CAM ("continuously aware mode"),
2194          * else user level */
2195         switch (mode) {
2196         case IWL_POWER_BATTERY:
2197                 final_mode = IWL_POWER_INDEX_3;
2198                 break;
2199         case IWL_POWER_AC:
2200                 final_mode = IWL_POWER_MODE_CAM;
2201                 break;
2202         default:
2203                 final_mode = mode;
2204                 break;
2205         }
2206
2207         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2208
2209         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2210
2211         if (final_mode == IWL_POWER_MODE_CAM)
2212                 clear_bit(STATUS_POWER_PMI, &priv->status);
2213         else
2214                 set_bit(STATUS_POWER_PMI, &priv->status);
2215
2216         return rc;
2217 }
2218
2219 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2220 {
2221         /* Filter incoming packets to determine if they are targeted toward
2222          * this network, discarding packets coming from ourselves */
2223         switch (priv->iw_mode) {
2224         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2225                 /* packets from our adapter are dropped (echo) */
2226                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2227                         return 0;
2228                 /* {broad,multi}cast packets to our IBSS go through */
2229                 if (is_multicast_ether_addr(header->addr1))
2230                         return !compare_ether_addr(header->addr3, priv->bssid);
2231                 /* packets to our adapter go through */
2232                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2233         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2234                 /* packets from our adapter are dropped (echo) */
2235                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2236                         return 0;
2237                 /* {broad,multi}cast packets to our BSS go through */
2238                 if (is_multicast_ether_addr(header->addr1))
2239                         return !compare_ether_addr(header->addr2, priv->bssid);
2240                 /* packets to our adapter go through */
2241                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2242         }
2243
2244         return 1;
2245 }
2246
2247 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2248
2249 static const char *iwl3945_get_tx_fail_reason(u32 status)
2250 {
2251         switch (status & TX_STATUS_MSK) {
2252         case TX_STATUS_SUCCESS:
2253                 return "SUCCESS";
2254                 TX_STATUS_ENTRY(SHORT_LIMIT);
2255                 TX_STATUS_ENTRY(LONG_LIMIT);
2256                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2257                 TX_STATUS_ENTRY(MGMNT_ABORT);
2258                 TX_STATUS_ENTRY(NEXT_FRAG);
2259                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2260                 TX_STATUS_ENTRY(DEST_PS);
2261                 TX_STATUS_ENTRY(ABORTED);
2262                 TX_STATUS_ENTRY(BT_RETRY);
2263                 TX_STATUS_ENTRY(STA_INVALID);
2264                 TX_STATUS_ENTRY(FRAG_DROPPED);
2265                 TX_STATUS_ENTRY(TID_DISABLE);
2266                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2267                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2268                 TX_STATUS_ENTRY(TX_LOCKED);
2269                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2270         }
2271
2272         return "UNKNOWN";
2273 }
2274
2275 /**
2276  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2277  *
2278  * NOTE: priv->mutex is not required before calling this function
2279  */
2280 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2281 {
2282         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2283                 clear_bit(STATUS_SCANNING, &priv->status);
2284                 return 0;
2285         }
2286
2287         if (test_bit(STATUS_SCANNING, &priv->status)) {
2288                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2289                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2290                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2291                         queue_work(priv->workqueue, &priv->abort_scan);
2292
2293                 } else
2294                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2295
2296                 return test_bit(STATUS_SCANNING, &priv->status);
2297         }
2298
2299         return 0;
2300 }
2301
2302 /**
2303  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2304  * @ms: amount of time to wait (in milliseconds) for scan to abort
2305  *
2306  * NOTE: priv->mutex must be held before calling this function
2307  */
2308 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2309 {
2310         unsigned long now = jiffies;
2311         int ret;
2312
2313         ret = iwl3945_scan_cancel(priv);
2314         if (ret && ms) {
2315                 mutex_unlock(&priv->mutex);
2316                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2317                                 test_bit(STATUS_SCANNING, &priv->status))
2318                         msleep(1);
2319                 mutex_lock(&priv->mutex);
2320
2321                 return test_bit(STATUS_SCANNING, &priv->status);
2322         }
2323
2324         return ret;
2325 }
2326
2327 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2328 {
2329         /* Reset ieee stats */
2330
2331         /* We don't reset the net_device_stats (ieee->stats) on
2332          * re-association */
2333
2334         priv->last_seq_num = -1;
2335         priv->last_frag_num = -1;
2336         priv->last_packet_time = 0;
2337
2338         iwl3945_scan_cancel(priv);
2339 }
2340
2341 #define MAX_UCODE_BEACON_INTERVAL       1024
2342 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2343
2344 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2345 {
2346         u16 new_val = 0;
2347         u16 beacon_factor = 0;
2348
2349         beacon_factor =
2350             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2351                 / MAX_UCODE_BEACON_INTERVAL;
2352         new_val = beacon_val / beacon_factor;
2353
2354         return cpu_to_le16(new_val);
2355 }
2356
2357 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2358 {
2359         u64 interval_tm_unit;
2360         u64 tsf, result;
2361         unsigned long flags;
2362         struct ieee80211_conf *conf = NULL;
2363         u16 beacon_int = 0;
2364
2365         conf = ieee80211_get_hw_conf(priv->hw);
2366
2367         spin_lock_irqsave(&priv->lock, flags);
2368         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2369         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2370
2371         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2372
2373         tsf = priv->timestamp1;
2374         tsf = ((tsf << 32) | priv->timestamp0);
2375
2376         beacon_int = priv->beacon_int;
2377         spin_unlock_irqrestore(&priv->lock, flags);
2378
2379         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2380                 if (beacon_int == 0) {
2381                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2382                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2383                 } else {
2384                         priv->rxon_timing.beacon_interval =
2385                                 cpu_to_le16(beacon_int);
2386                         priv->rxon_timing.beacon_interval =
2387                             iwl3945_adjust_beacon_interval(
2388                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2389                 }
2390
2391                 priv->rxon_timing.atim_window = 0;
2392         } else {
2393                 priv->rxon_timing.beacon_interval =
2394                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2395                 /* TODO: we need to get atim_window from upper stack
2396                  * for now we set to 0 */
2397                 priv->rxon_timing.atim_window = 0;
2398         }
2399
2400         interval_tm_unit =
2401                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2402         result = do_div(tsf, interval_tm_unit);
2403         priv->rxon_timing.beacon_init_val =
2404             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2405
2406         IWL_DEBUG_ASSOC
2407             ("beacon interval %d beacon timer %d beacon tim %d\n",
2408                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2409                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2410                 le16_to_cpu(priv->rxon_timing.atim_window));
2411 }
2412
2413 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2414 {
2415         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2416                 IWL_ERROR("APs don't scan.\n");
2417                 return 0;
2418         }
2419
2420         if (!iwl3945_is_ready_rf(priv)) {
2421                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2422                 return -EIO;
2423         }
2424
2425         if (test_bit(STATUS_SCANNING, &priv->status)) {
2426                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2427                 return -EAGAIN;
2428         }
2429
2430         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2431                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2432                                "Queuing.\n");
2433                 return -EAGAIN;
2434         }
2435
2436         IWL_DEBUG_INFO("Starting scan...\n");
2437         priv->scan_bands = 2;
2438         set_bit(STATUS_SCANNING, &priv->status);
2439         priv->scan_start = jiffies;
2440         priv->scan_pass_start = priv->scan_start;
2441
2442         queue_work(priv->workqueue, &priv->request_scan);
2443
2444         return 0;
2445 }
2446
2447 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2448 {
2449         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2450
2451         if (hw_decrypt)
2452                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2453         else
2454                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2455
2456         return 0;
2457 }
2458
2459 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2460                                           enum ieee80211_band band)
2461 {
2462         if (band == IEEE80211_BAND_5GHZ) {
2463                 priv->staging_rxon.flags &=
2464                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2465                       | RXON_FLG_CCK_MSK);
2466                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2467         } else {
2468                 /* Copied from iwl3945_bg_post_associate() */
2469                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2470                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2471                 else
2472                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2473
2474                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2475                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2476
2477                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2478                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2479                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2480         }
2481 }
2482
2483 /*
2484  * initialize rxon structure with default values from eeprom
2485  */
2486 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2487 {
2488         const struct iwl3945_channel_info *ch_info;
2489
2490         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2491
2492         switch (priv->iw_mode) {
2493         case IEEE80211_IF_TYPE_AP:
2494                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2495                 break;
2496
2497         case IEEE80211_IF_TYPE_STA:
2498                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2499                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2500                 break;
2501
2502         case IEEE80211_IF_TYPE_IBSS:
2503                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2504                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2505                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2506                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2507                 break;
2508
2509         case IEEE80211_IF_TYPE_MNTR:
2510                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2511                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2512                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2513                 break;
2514         }
2515
2516 #if 0
2517         /* TODO:  Figure out when short_preamble would be set and cache from
2518          * that */
2519         if (!hw_to_local(priv->hw)->short_preamble)
2520                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2521         else
2522                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2523 #endif
2524
2525         ch_info = iwl3945_get_channel_info(priv, priv->band,
2526                                        le16_to_cpu(priv->staging_rxon.channel));
2527
2528         if (!ch_info)
2529                 ch_info = &priv->channel_info[0];
2530
2531         /*
2532          * in some case A channels are all non IBSS
2533          * in this case force B/G channel
2534          */
2535         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2536             !(is_channel_ibss(ch_info)))
2537                 ch_info = &priv->channel_info[0];
2538
2539         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2540         if (is_channel_a_band(ch_info))
2541                 priv->band = IEEE80211_BAND_5GHZ;
2542         else
2543                 priv->band = IEEE80211_BAND_2GHZ;
2544
2545         iwl3945_set_flags_for_phymode(priv, priv->band);
2546
2547         priv->staging_rxon.ofdm_basic_rates =
2548             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2549         priv->staging_rxon.cck_basic_rates =
2550             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2551 }
2552
2553 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2554 {
2555         if (mode == IEEE80211_IF_TYPE_IBSS) {
2556                 const struct iwl3945_channel_info *ch_info;
2557
2558                 ch_info = iwl3945_get_channel_info(priv,
2559                         priv->band,
2560                         le16_to_cpu(priv->staging_rxon.channel));
2561
2562                 if (!ch_info || !is_channel_ibss(ch_info)) {
2563                         IWL_ERROR("channel %d not IBSS channel\n",
2564                                   le16_to_cpu(priv->staging_rxon.channel));
2565                         return -EINVAL;
2566                 }
2567         }
2568
2569         priv->iw_mode = mode;
2570
2571         iwl3945_connection_init_rx_config(priv);
2572         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2573
2574         iwl3945_clear_stations_table(priv);
2575
2576         /* dont commit rxon if rf-kill is on*/
2577         if (!iwl3945_is_ready_rf(priv))
2578                 return -EAGAIN;
2579
2580         cancel_delayed_work(&priv->scan_check);
2581         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2582                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2583                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2584                 return -EAGAIN;
2585         }
2586
2587         iwl3945_commit_rxon(priv);
2588
2589         return 0;
2590 }
2591
2592 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2593                                       struct ieee80211_tx_control *ctl,
2594                                       struct iwl3945_cmd *cmd,
2595                                       struct sk_buff *skb_frag,
2596                                       int last_frag)
2597 {
2598         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2599
2600         switch (keyinfo->alg) {
2601         case ALG_CCMP:
2602                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2603                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2604                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2605                 break;
2606
2607         case ALG_TKIP:
2608 #if 0
2609                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2610
2611                 if (last_frag)
2612                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2613                                8);
2614                 else
2615                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2616 #endif
2617                 break;
2618
2619         case ALG_WEP:
2620                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2621                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2622
2623                 if (keyinfo->keylen == 13)
2624                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2625
2626                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2627
2628                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2629                              "with key %d\n", ctl->key_idx);
2630                 break;
2631
2632         default:
2633                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2634                 break;
2635         }
2636 }
2637
2638 /*
2639  * handle build REPLY_TX command notification.
2640  */
2641 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2642                                   struct iwl3945_cmd *cmd,
2643                                   struct ieee80211_tx_control *ctrl,
2644                                   struct ieee80211_hdr *hdr,
2645                                   int is_unicast, u8 std_id)
2646 {
2647         __le16 *qc;
2648         u16 fc = le16_to_cpu(hdr->frame_control);
2649         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2650
2651         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2652         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2653                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2654                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2655                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2656                 if (ieee80211_is_probe_response(fc) &&
2657                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2658                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2659         } else {
2660                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2661                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2662         }
2663
2664         cmd->cmd.tx.sta_id = std_id;
2665         if (ieee80211_get_morefrag(hdr))
2666                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2667
2668         qc = ieee80211_get_qos_ctrl(hdr);
2669         if (qc) {
2670                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2671                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2672         } else
2673                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2674
2675         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2676                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2677                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2678         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2679                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2680                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2681         }
2682
2683         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2684                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2685
2686         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2687         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2688                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2689                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2690                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2691                 else
2692                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2693         } else
2694                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2695
2696         cmd->cmd.tx.driver_txop = 0;
2697         cmd->cmd.tx.tx_flags = tx_flags;
2698         cmd->cmd.tx.next_frame_len = 0;
2699 }
2700
2701 /**
2702  * iwl3945_get_sta_id - Find station's index within station table
2703  */
2704 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2705 {
2706         int sta_id;
2707         u16 fc = le16_to_cpu(hdr->frame_control);
2708
2709         /* If this frame is broadcast or management, use broadcast station id */
2710         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2711             is_multicast_ether_addr(hdr->addr1))
2712                 return priv->hw_setting.bcast_sta_id;
2713
2714         switch (priv->iw_mode) {
2715
2716         /* If we are a client station in a BSS network, use the special
2717          * AP station entry (that's the only station we communicate with) */
2718         case IEEE80211_IF_TYPE_STA:
2719                 return IWL_AP_ID;
2720
2721         /* If we are an AP, then find the station, or use BCAST */
2722         case IEEE80211_IF_TYPE_AP:
2723                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2724                 if (sta_id != IWL_INVALID_STATION)
2725                         return sta_id;
2726                 return priv->hw_setting.bcast_sta_id;
2727
2728         /* If this frame is going out to an IBSS network, find the station,
2729          * or create a new station table entry */
2730         case IEEE80211_IF_TYPE_IBSS: {
2731                 DECLARE_MAC_BUF(mac);
2732
2733                 /* Create new station table entry */
2734                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2735                 if (sta_id != IWL_INVALID_STATION)
2736                         return sta_id;
2737
2738                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2739
2740                 if (sta_id != IWL_INVALID_STATION)
2741                         return sta_id;
2742
2743                 IWL_DEBUG_DROP("Station %s not in station map. "
2744                                "Defaulting to broadcast...\n",
2745                                print_mac(mac, hdr->addr1));
2746                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2747                 return priv->hw_setting.bcast_sta_id;
2748         }
2749         default:
2750                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2751                 return priv->hw_setting.bcast_sta_id;
2752         }
2753 }
2754
2755 /*
2756  * start REPLY_TX command process
2757  */
2758 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2759                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2760 {
2761         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2762         struct iwl3945_tfd_frame *tfd;
2763         u32 *control_flags;
2764         int txq_id = ctl->queue;
2765         struct iwl3945_tx_queue *txq = NULL;
2766         struct iwl3945_queue *q = NULL;
2767         dma_addr_t phys_addr;
2768         dma_addr_t txcmd_phys;
2769         struct iwl3945_cmd *out_cmd = NULL;
2770         u16 len, idx, len_org;
2771         u8 id, hdr_len, unicast;
2772         u8 sta_id;
2773         u16 seq_number = 0;
2774         u16 fc;
2775         __le16 *qc;
2776         u8 wait_write_ptr = 0;
2777         unsigned long flags;
2778         int rc;
2779
2780         spin_lock_irqsave(&priv->lock, flags);
2781         if (iwl3945_is_rfkill(priv)) {
2782                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2783                 goto drop_unlock;
2784         }
2785
2786         if (!priv->vif) {
2787                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2788                 goto drop_unlock;
2789         }
2790
2791         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2792                 IWL_ERROR("ERROR: No TX rate available.\n");
2793                 goto drop_unlock;
2794         }
2795
2796         unicast = !is_multicast_ether_addr(hdr->addr1);
2797         id = 0;
2798
2799         fc = le16_to_cpu(hdr->frame_control);
2800
2801 #ifdef CONFIG_IWL3945_DEBUG
2802         if (ieee80211_is_auth(fc))
2803                 IWL_DEBUG_TX("Sending AUTH frame\n");
2804         else if (ieee80211_is_assoc_request(fc))
2805                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2806         else if (ieee80211_is_reassoc_request(fc))
2807                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2808 #endif
2809
2810         /* drop all data frame if we are not associated */
2811         if ((!iwl3945_is_associated(priv) ||
2812              ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id)) &&
2813             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2814                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2815                 goto drop_unlock;
2816         }
2817
2818         spin_unlock_irqrestore(&priv->lock, flags);
2819
2820         hdr_len = ieee80211_get_hdrlen(fc);
2821
2822         /* Find (or create) index into station table for destination station */
2823         sta_id = iwl3945_get_sta_id(priv, hdr);
2824         if (sta_id == IWL_INVALID_STATION) {
2825                 DECLARE_MAC_BUF(mac);
2826
2827                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2828                                print_mac(mac, hdr->addr1));
2829                 goto drop;
2830         }
2831
2832         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2833
2834         qc = ieee80211_get_qos_ctrl(hdr);
2835         if (qc) {
2836                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2837                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2838                                 IEEE80211_SCTL_SEQ;
2839                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2840                         (hdr->seq_ctrl &
2841                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2842                 seq_number += 0x10;
2843         }
2844
2845         /* Descriptor for chosen Tx queue */
2846         txq = &priv->txq[txq_id];
2847         q = &txq->q;
2848
2849         spin_lock_irqsave(&priv->lock, flags);
2850
2851         /* Set up first empty TFD within this queue's circular TFD buffer */
2852         tfd = &txq->bd[q->write_ptr];
2853         memset(tfd, 0, sizeof(*tfd));
2854         control_flags = (u32 *) tfd;
2855         idx = get_cmd_index(q, q->write_ptr, 0);
2856
2857         /* Set up driver data for this TFD */
2858         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2859         txq->txb[q->write_ptr].skb[0] = skb;
2860         memcpy(&(txq->txb[q->write_ptr].status.control),
2861                ctl, sizeof(struct ieee80211_tx_control));
2862
2863         /* Init first empty entry in queue's array of Tx/cmd buffers */
2864         out_cmd = &txq->cmd[idx];
2865         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2866         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2867
2868         /*
2869          * Set up the Tx-command (not MAC!) header.
2870          * Store the chosen Tx queue and TFD index within the sequence field;
2871          * after Tx, uCode's Tx response will return this value so driver can
2872          * locate the frame within the tx queue and do post-tx processing.
2873          */
2874         out_cmd->hdr.cmd = REPLY_TX;
2875         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2876                                 INDEX_TO_SEQ(q->write_ptr)));
2877
2878         /* Copy MAC header from skb into command buffer */
2879         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2880
2881         /*
2882          * Use the first empty entry in this queue's command buffer array
2883          * to contain the Tx command and MAC header concatenated together
2884          * (payload data will be in another buffer).
2885          * Size of this varies, due to varying MAC header length.
2886          * If end is not dword aligned, we'll have 2 extra bytes at the end
2887          * of the MAC header (device reads on dword boundaries).
2888          * We'll tell device about this padding later.
2889          */
2890         len = priv->hw_setting.tx_cmd_len +
2891                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2892
2893         len_org = len;
2894         len = (len + 3) & ~3;
2895
2896         if (len_org != len)
2897                 len_org = 1;
2898         else
2899                 len_org = 0;
2900
2901         /* Physical address of this Tx command's header (not MAC header!),
2902          * within command buffer array. */
2903         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2904                      offsetof(struct iwl3945_cmd, hdr);
2905
2906         /* Add buffer containing Tx command and MAC(!) header to TFD's
2907          * first entry */
2908         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2909
2910         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2911                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2912
2913         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2914          * if any (802.11 null frames have no payload). */
2915         len = skb->len - hdr_len;
2916         if (len) {
2917                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2918                                            len, PCI_DMA_TODEVICE);
2919                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2920         }
2921
2922         if (!len)
2923                 /* If there is no payload, then we use only one Tx buffer */
2924                 *control_flags = TFD_CTL_COUNT_SET(1);
2925         else
2926                 /* Else use 2 buffers.
2927                  * Tell 3945 about any padding after MAC header */
2928                 *control_flags = TFD_CTL_COUNT_SET(2) |
2929                         TFD_CTL_PAD_SET(U32_PAD(len));
2930
2931         /* Total # bytes to be transmitted */
2932         len = (u16)skb->len;
2933         out_cmd->cmd.tx.len = cpu_to_le16(len);
2934
2935         /* TODO need this for burst mode later on */
2936         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2937
2938         /* set is_hcca to 0; it probably will never be implemented */
2939         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2940
2941         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2942         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2943
2944         if (!ieee80211_get_morefrag(hdr)) {
2945                 txq->need_update = 1;
2946                 if (qc) {
2947                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2948                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2949                 }
2950         } else {
2951                 wait_write_ptr = 1;
2952                 txq->need_update = 0;
2953         }
2954
2955         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2956                            sizeof(out_cmd->cmd.tx));
2957
2958         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2959                            ieee80211_get_hdrlen(fc));
2960
2961         /* Tell device the write index *just past* this latest filled TFD */
2962         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
2963         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2964         spin_unlock_irqrestore(&priv->lock, flags);
2965
2966         if (rc)
2967                 return rc;
2968
2969         if ((iwl3945_queue_space(q) < q->high_mark)
2970             && priv->mac80211_registered) {
2971                 if (wait_write_ptr) {
2972                         spin_lock_irqsave(&priv->lock, flags);
2973                         txq->need_update = 1;
2974                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2975                         spin_unlock_irqrestore(&priv->lock, flags);
2976                 }
2977
2978                 ieee80211_stop_queue(priv->hw, ctl->queue);
2979         }
2980
2981         return 0;
2982
2983 drop_unlock:
2984         spin_unlock_irqrestore(&priv->lock, flags);
2985 drop:
2986         return -1;
2987 }
2988
2989 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2990 {
2991         const struct ieee80211_supported_band *sband = NULL;
2992         struct ieee80211_rate *rate;
2993         int i;
2994
2995         sband = iwl3945_get_band(priv, priv->band);
2996         if (!sband) {
2997                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2998                 return;
2999         }
3000
3001         priv->active_rate = 0;
3002         priv->active_rate_basic = 0;
3003
3004         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
3005                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
3006
3007         for (i = 0; i < sband->n_bitrates; i++) {
3008                 rate = &sband->bitrates[i];
3009                 if ((rate->hw_value < IWL_RATE_COUNT) &&
3010                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
3011                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
3012                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
3013                         priv->active_rate |= (1 << rate->hw_value);
3014                 }
3015         }
3016
3017         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3018                        priv->active_rate, priv->active_rate_basic);
3019
3020         /*
3021          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3022          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3023          * OFDM
3024          */
3025         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3026                 priv->staging_rxon.cck_basic_rates =
3027                     ((priv->active_rate_basic &
3028                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3029         else
3030                 priv->staging_rxon.cck_basic_rates =
3031                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3032
3033         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3034                 priv->staging_rxon.ofdm_basic_rates =
3035                     ((priv->active_rate_basic &
3036                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3037                       IWL_FIRST_OFDM_RATE) & 0xFF;
3038         else
3039                 priv->staging_rxon.ofdm_basic_rates =
3040                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3041 }
3042
3043 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
3044 {
3045         unsigned long flags;
3046
3047         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3048                 return;
3049
3050         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3051                           disable_radio ? "OFF" : "ON");
3052
3053         if (disable_radio) {
3054                 iwl3945_scan_cancel(priv);
3055                 /* FIXME: This is a workaround for AP */
3056                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3057                         spin_lock_irqsave(&priv->lock, flags);
3058                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3059                                     CSR_UCODE_SW_BIT_RFKILL);
3060                         spin_unlock_irqrestore(&priv->lock, flags);
3061                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3062                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3063                 }
3064                 return;
3065         }
3066
3067         spin_lock_irqsave(&priv->lock, flags);
3068         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3069
3070         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3071         spin_unlock_irqrestore(&priv->lock, flags);
3072
3073         /* wake up ucode */
3074         msleep(10);
3075
3076         spin_lock_irqsave(&priv->lock, flags);
3077         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3078         if (!iwl3945_grab_nic_access(priv))
3079                 iwl3945_release_nic_access(priv);
3080         spin_unlock_irqrestore(&priv->lock, flags);
3081
3082         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3083                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3084                                   "disabled by HW switch\n");
3085                 return;
3086         }
3087
3088         queue_work(priv->workqueue, &priv->restart);
3089         return;
3090 }
3091
3092 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
3093                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3094 {
3095         u16 fc =
3096             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3097
3098         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3099                 return;
3100
3101         if (!(fc & IEEE80211_FCTL_PROTECTED))
3102                 return;
3103
3104         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3105         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3106         case RX_RES_STATUS_SEC_TYPE_TKIP:
3107                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3108                     RX_RES_STATUS_BAD_ICV_MIC)
3109                         stats->flag |= RX_FLAG_MMIC_ERROR;
3110         case RX_RES_STATUS_SEC_TYPE_WEP:
3111         case RX_RES_STATUS_SEC_TYPE_CCMP:
3112                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3113                     RX_RES_STATUS_DECRYPT_OK) {
3114                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3115                         stats->flag |= RX_FLAG_DECRYPTED;
3116                 }
3117                 break;
3118
3119         default:
3120                 break;
3121         }
3122 }
3123
3124 #define IWL_PACKET_RETRY_TIME HZ
3125
3126 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
3127 {
3128         u16 sc = le16_to_cpu(header->seq_ctrl);
3129         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3130         u16 frag = sc & IEEE80211_SCTL_FRAG;
3131         u16 *last_seq, *last_frag;
3132         unsigned long *last_time;
3133
3134         switch (priv->iw_mode) {
3135         case IEEE80211_IF_TYPE_IBSS:{
3136                 struct list_head *p;
3137                 struct iwl3945_ibss_seq *entry = NULL;
3138                 u8 *mac = header->addr2;
3139                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3140
3141                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3142                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
3143                         if (!compare_ether_addr(entry->mac, mac))
3144                                 break;
3145                 }
3146                 if (p == &priv->ibss_mac_hash[index]) {
3147                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3148                         if (!entry) {
3149                                 IWL_ERROR("Cannot malloc new mac entry\n");
3150                                 return 0;
3151                         }
3152                         memcpy(entry->mac, mac, ETH_ALEN);
3153                         entry->seq_num = seq;
3154                         entry->frag_num = frag;
3155                         entry->packet_time = jiffies;
3156                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3157                         return 0;
3158                 }
3159                 last_seq = &entry->seq_num;
3160                 last_frag = &entry->frag_num;
3161                 last_time = &entry->packet_time;
3162                 break;
3163         }
3164         case IEEE80211_IF_TYPE_STA:
3165                 last_seq = &priv->last_seq_num;
3166                 last_frag = &priv->last_frag_num;
3167                 last_time = &priv->last_packet_time;
3168                 break;
3169         default:
3170                 return 0;
3171         }
3172         if ((*last_seq == seq) &&
3173             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3174                 if (*last_frag == frag)
3175                         goto drop;
3176                 if (*last_frag + 1 != frag)
3177                         /* out-of-order fragment */
3178                         goto drop;
3179         } else
3180                 *last_seq = seq;
3181
3182         *last_frag = frag;
3183         *last_time = jiffies;
3184         return 0;
3185
3186  drop:
3187         return 1;
3188 }
3189
3190 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3191
3192 #include "iwl-spectrum.h"
3193
3194 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3195 #define BEACON_TIME_MASK_HIGH   0xFF000000
3196 #define TIME_UNIT               1024
3197
3198 /*
3199  * extended beacon time format
3200  * time in usec will be changed into a 32-bit value in 8:24 format
3201  * the high 1 byte is the beacon counts
3202  * the lower 3 bytes is the time in usec within one beacon interval
3203  */
3204
3205 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3206 {
3207         u32 quot;
3208         u32 rem;
3209         u32 interval = beacon_interval * 1024;
3210
3211         if (!interval || !usec)
3212                 return 0;
3213
3214         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3215         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3216
3217         return (quot << 24) + rem;
3218 }
3219
3220 /* base is usually what we get from ucode with each received frame,
3221  * the same as HW timer counter counting down
3222  */
3223
3224 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3225 {
3226         u32 base_low = base & BEACON_TIME_MASK_LOW;
3227         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3228         u32 interval = beacon_interval * TIME_UNIT;
3229         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3230             (addon & BEACON_TIME_MASK_HIGH);
3231
3232         if (base_low > addon_low)
3233                 res += base_low - addon_low;
3234         else if (base_low < addon_low) {
3235                 res += interval + base_low - addon_low;
3236                 res += (1 << 24);
3237         } else
3238                 res += (1 << 24);
3239
3240         return cpu_to_le32(res);
3241 }
3242
3243 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3244                                struct ieee80211_measurement_params *params,
3245                                u8 type)
3246 {
3247         struct iwl3945_spectrum_cmd spectrum;
3248         struct iwl3945_rx_packet *res;
3249         struct iwl3945_host_cmd cmd = {
3250                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3251                 .data = (void *)&spectrum,
3252                 .meta.flags = CMD_WANT_SKB,
3253         };
3254         u32 add_time = le64_to_cpu(params->start_time);
3255         int rc;
3256         int spectrum_resp_status;
3257         int duration = le16_to_cpu(params->duration);
3258
3259         if (iwl3945_is_associated(priv))
3260                 add_time =
3261                     iwl3945_usecs_to_beacons(
3262                         le64_to_cpu(params->start_time) - priv->last_tsf,
3263                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3264
3265         memset(&spectrum, 0, sizeof(spectrum));
3266
3267         spectrum.channel_count = cpu_to_le16(1);
3268         spectrum.flags =
3269             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3270         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3271         cmd.len = sizeof(spectrum);
3272         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3273
3274         if (iwl3945_is_associated(priv))
3275                 spectrum.start_time =
3276                     iwl3945_add_beacon_time(priv->last_beacon_time,
3277                                 add_time,
3278                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3279         else
3280                 spectrum.start_time = 0;
3281
3282         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3283         spectrum.channels[0].channel = params->channel;
3284         spectrum.channels[0].type = type;
3285         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3286                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3287                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3288
3289         rc = iwl3945_send_cmd_sync(priv, &cmd);
3290         if (rc)
3291                 return rc;
3292
3293         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3294         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3295                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3296                 rc = -EIO;
3297         }
3298
3299         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3300         switch (spectrum_resp_status) {
3301         case 0:         /* Command will be handled */
3302                 if (res->u.spectrum.id != 0xff) {
3303                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3304                                                 res->u.spectrum.id);
3305                         priv->measurement_status &= ~MEASUREMENT_READY;
3306                 }
3307                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3308                 rc = 0;
3309                 break;
3310
3311         case 1:         /* Command will not be handled */
3312                 rc = -EAGAIN;
3313                 break;
3314         }
3315
3316         dev_kfree_skb_any(cmd.meta.u.skb);
3317
3318         return rc;
3319 }
3320 #endif
3321
3322 static void iwl3945_txstatus_to_ieee(struct iwl3945_priv *priv,
3323                                  struct iwl3945_tx_info *tx_sta)
3324 {
3325
3326         tx_sta->status.ack_signal = 0;
3327         tx_sta->status.excessive_retries = 0;
3328         tx_sta->status.queue_length = 0;
3329         tx_sta->status.queue_number = 0;
3330
3331         if (in_interrupt())
3332                 ieee80211_tx_status_irqsafe(priv->hw,
3333                                             tx_sta->skb[0], &(tx_sta->status));
3334         else
3335                 ieee80211_tx_status(priv->hw,
3336                                     tx_sta->skb[0], &(tx_sta->status));
3337
3338         tx_sta->skb[0] = NULL;
3339 }
3340
3341 /**
3342  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3343  *
3344  * When FW advances 'R' index, all entries between old and new 'R' index
3345  * need to be reclaimed. As result, some free space forms. If there is
3346  * enough free space (> low mark), wake the stack that feeds us.
3347  */
3348 static int iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv, int txq_id, int index)
3349 {
3350         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3351         struct iwl3945_queue *q = &txq->q;
3352         int nfreed = 0;
3353
3354         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3355                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3356                           "is out of range [0-%d] %d %d.\n", txq_id,
3357                           index, q->n_bd, q->write_ptr, q->read_ptr);
3358                 return 0;
3359         }
3360
3361         for (index = iwl3945_queue_inc_wrap(index, q->n_bd);
3362                 q->read_ptr != index;
3363                 q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3364                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3365                         iwl3945_txstatus_to_ieee(priv,
3366                                         &(txq->txb[txq->q.read_ptr]));
3367                         iwl3945_hw_txq_free_tfd(priv, txq);
3368                 } else if (nfreed > 1) {
3369                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3370                                         q->write_ptr, q->read_ptr);
3371                         queue_work(priv->workqueue, &priv->restart);
3372                 }
3373                 nfreed++;
3374         }
3375
3376         if (iwl3945_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3377                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3378                         priv->mac80211_registered)
3379                 ieee80211_wake_queue(priv->hw, txq_id);
3380
3381
3382         return nfreed;
3383 }
3384
3385 static int iwl3945_is_tx_success(u32 status)
3386 {
3387         return (status & 0xFF) == 0x1;
3388 }
3389
3390 /******************************************************************************
3391  *
3392  * Generic RX handler implementations
3393  *
3394  ******************************************************************************/
3395 /**
3396  * iwl3945_rx_reply_tx - Handle Tx response
3397  */
3398 static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
3399                             struct iwl3945_rx_mem_buffer *rxb)
3400 {
3401         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3402         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3403         int txq_id = SEQ_TO_QUEUE(sequence);
3404         int index = SEQ_TO_INDEX(sequence);
3405         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3406         struct ieee80211_tx_status *tx_status;
3407         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3408         u32  status = le32_to_cpu(tx_resp->status);
3409
3410         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3411                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3412                           "is out of range [0-%d] %d %d\n", txq_id,
3413                           index, txq->q.n_bd, txq->q.write_ptr,
3414                           txq->q.read_ptr);
3415                 return;
3416         }
3417
3418         tx_status = &(txq->txb[txq->q.read_ptr].status);
3419
3420         tx_status->retry_count = tx_resp->failure_frame;
3421         tx_status->queue_number = status;
3422         tx_status->queue_length = tx_resp->bt_kill_count;
3423         tx_status->queue_length |= tx_resp->failure_rts;
3424
3425         tx_status->flags =
3426             iwl3945_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3427
3428         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3429                         txq_id, iwl3945_get_tx_fail_reason(status), status,
3430                         tx_resp->rate, tx_resp->failure_frame);
3431
3432         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3433         if (index != -1)
3434                 iwl3945_tx_queue_reclaim(priv, txq_id, index);
3435
3436         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3437                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3438 }
3439
3440
3441 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3442                                struct iwl3945_rx_mem_buffer *rxb)
3443 {
3444         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3445         struct iwl3945_alive_resp *palive;
3446         struct delayed_work *pwork;
3447
3448         palive = &pkt->u.alive_frame;
3449
3450         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3451                        "0x%01X 0x%01X\n",
3452                        palive->is_valid, palive->ver_type,
3453                        palive->ver_subtype);
3454
3455         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3456                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3457                 memcpy(&priv->card_alive_init,
3458                        &pkt->u.alive_frame,
3459                        sizeof(struct iwl3945_init_alive_resp));
3460                 pwork = &priv->init_alive_start;
3461         } else {
3462                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3463                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3464                        sizeof(struct iwl3945_alive_resp));
3465                 pwork = &priv->alive_start;
3466                 iwl3945_disable_events(priv);
3467         }
3468
3469         /* We delay the ALIVE response by 5ms to
3470          * give the HW RF Kill time to activate... */
3471         if (palive->is_valid == UCODE_VALID_OK)
3472                 queue_delayed_work(priv->workqueue, pwork,
3473                                    msecs_to_jiffies(5));
3474         else
3475                 IWL_WARNING("uCode did not respond OK.\n");
3476 }
3477
3478 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3479                                  struct iwl3945_rx_mem_buffer *rxb)
3480 {
3481         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3482
3483         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3484         return;
3485 }
3486
3487 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3488                                struct iwl3945_rx_mem_buffer *rxb)
3489 {
3490         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3491
3492         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3493                 "seq 0x%04X ser 0x%08X\n",
3494                 le32_to_cpu(pkt->u.err_resp.error_type),
3495                 get_cmd_string(pkt->u.err_resp.cmd_id),
3496                 pkt->u.err_resp.cmd_id,
3497                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3498                 le32_to_cpu(pkt->u.err_resp.error_info));
3499 }
3500
3501 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3502
3503 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3504 {
3505         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3506         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3507         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3508         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3509                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3510         rxon->channel = csa->channel;
3511         priv->staging_rxon.channel = csa->channel;
3512 }
3513
3514 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3515                                           struct iwl3945_rx_mem_buffer *rxb)
3516 {
3517 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3518         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3519         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3520
3521         if (!report->state) {
3522                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3523                           "Spectrum Measure Notification: Start\n");
3524                 return;
3525         }
3526
3527         memcpy(&priv->measure_report, report, sizeof(*report));
3528         priv->measurement_status |= MEASUREMENT_READY;
3529 #endif
3530 }
3531
3532 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3533                                   struct iwl3945_rx_mem_buffer *rxb)
3534 {
3535 #ifdef CONFIG_IWL3945_DEBUG
3536         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3537         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3538         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3539                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3540 #endif
3541 }
3542
3543 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3544                                              struct iwl3945_rx_mem_buffer *rxb)
3545 {
3546         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3547         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3548                         "notification for %s:\n",
3549                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3550         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3551 }
3552
3553 static void iwl3945_bg_beacon_update(struct work_struct *work)
3554 {
3555         struct iwl3945_priv *priv =
3556                 container_of(work, struct iwl3945_priv, beacon_update);
3557         struct sk_buff *beacon;
3558
3559         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3560         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3561
3562         if (!beacon) {
3563                 IWL_ERROR("update beacon failed\n");
3564                 return;
3565         }
3566
3567         mutex_lock(&priv->mutex);
3568         /* new beacon skb is allocated every time; dispose previous.*/
3569         if (priv->ibss_beacon)
3570                 dev_kfree_skb(priv->ibss_beacon);
3571
3572         priv->ibss_beacon = beacon;
3573         mutex_unlock(&priv->mutex);
3574
3575         iwl3945_send_beacon_cmd(priv);
3576 }
3577
3578 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3579                                 struct iwl3945_rx_mem_buffer *rxb)
3580 {
3581 #ifdef CONFIG_IWL3945_DEBUG
3582         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3583         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3584         u8 rate = beacon->beacon_notify_hdr.rate;
3585
3586         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3587                 "tsf %d %d rate %d\n",
3588                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3589                 beacon->beacon_notify_hdr.failure_frame,
3590                 le32_to_cpu(beacon->ibss_mgr_status),
3591                 le32_to_cpu(beacon->high_tsf),
3592                 le32_to_cpu(beacon->low_tsf), rate);
3593 #endif
3594
3595         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3596             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3597                 queue_work(priv->workqueue, &priv->beacon_update);
3598 }
3599
3600 /* Service response to REPLY_SCAN_CMD (0x80) */
3601 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3602                               struct iwl3945_rx_mem_buffer *rxb)
3603 {
3604 #ifdef CONFIG_IWL3945_DEBUG
3605         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3606         struct iwl3945_scanreq_notification *notif =
3607             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3608
3609         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3610 #endif
3611 }
3612
3613 /* Service SCAN_START_NOTIFICATION (0x82) */
3614 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3615                                     struct iwl3945_rx_mem_buffer *rxb)
3616 {
3617         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3618         struct iwl3945_scanstart_notification *notif =
3619             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3620         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3621         IWL_DEBUG_SCAN("Scan start: "
3622                        "%d [802.11%s] "
3623                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3624                        notif->channel,
3625                        notif->band ? "bg" : "a",
3626                        notif->tsf_high,
3627                        notif->tsf_low, notif->status, notif->beacon_timer);
3628 }
3629
3630 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3631 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3632                                       struct iwl3945_rx_mem_buffer *rxb)
3633 {
3634         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3635         struct iwl3945_scanresults_notification *notif =
3636             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3637
3638         IWL_DEBUG_SCAN("Scan ch.res: "
3639                        "%d [802.11%s] "
3640                        "(TSF: 0x%08X:%08X) - %d "
3641                        "elapsed=%lu usec (%dms since last)\n",
3642                        notif->channel,
3643                        notif->band ? "bg" : "a",
3644                        le32_to_cpu(notif->tsf_high),
3645                        le32_to_cpu(notif->tsf_low),
3646                        le32_to_cpu(notif->statistics[0]),
3647                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3648                        jiffies_to_msecs(elapsed_jiffies
3649                                         (priv->last_scan_jiffies, jiffies)));
3650
3651         priv->last_scan_jiffies = jiffies;
3652         priv->next_scan_jiffies = 0;
3653 }
3654
3655 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3656 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3657                                        struct iwl3945_rx_mem_buffer *rxb)
3658 {
3659         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3660         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3661
3662         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3663                        scan_notif->scanned_channels,
3664                        scan_notif->tsf_low,
3665                        scan_notif->tsf_high, scan_notif->status);
3666
3667         /* The HW is no longer scanning */
3668         clear_bit(STATUS_SCAN_HW, &priv->status);
3669
3670         /* The scan completion notification came in, so kill that timer... */
3671         cancel_delayed_work(&priv->scan_check);
3672
3673         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3674                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3675                        jiffies_to_msecs(elapsed_jiffies
3676                                         (priv->scan_pass_start, jiffies)));
3677
3678         /* Remove this scanned band from the list
3679          * of pending bands to scan */
3680         priv->scan_bands--;
3681
3682         /* If a request to abort was given, or the scan did not succeed
3683          * then we reset the scan state machine and terminate,
3684          * re-queuing another scan if one has been requested */
3685         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3686                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3687                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3688         } else {
3689                 /* If there are more bands on this scan pass reschedule */
3690                 if (priv->scan_bands > 0)
3691                         goto reschedule;
3692         }
3693
3694         priv->last_scan_jiffies = jiffies;
3695         priv->next_scan_jiffies = 0;
3696         IWL_DEBUG_INFO("Setting scan to off\n");
3697
3698         clear_bit(STATUS_SCANNING, &priv->status);
3699
3700         IWL_DEBUG_INFO("Scan took %dms\n",
3701                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3702
3703         queue_work(priv->workqueue, &priv->scan_completed);
3704
3705         return;
3706
3707 reschedule:
3708         priv->scan_pass_start = jiffies;
3709         queue_work(priv->workqueue, &priv->request_scan);
3710 }
3711
3712 /* Handle notification from uCode that card's power state is changing
3713  * due to software, hardware, or critical temperature RFKILL */
3714 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3715                                     struct iwl3945_rx_mem_buffer *rxb)
3716 {
3717         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3718         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3719         unsigned long status = priv->status;
3720
3721         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3722                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3723                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3724
3725         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3726                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3727
3728         if (flags & HW_CARD_DISABLED)
3729                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3730         else
3731                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3732
3733
3734         if (flags & SW_CARD_DISABLED)
3735                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3736         else
3737                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3738
3739         iwl3945_scan_cancel(priv);
3740
3741         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3742              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3743             (test_bit(STATUS_RF_KILL_SW, &status) !=
3744              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3745                 queue_work(priv->workqueue, &priv->rf_kill);
3746         else
3747                 wake_up_interruptible(&priv->wait_command_queue);
3748 }
3749
3750 /**
3751  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3752  *
3753  * Setup the RX handlers for each of the reply types sent from the uCode
3754  * to the host.
3755  *
3756  * This function chains into the hardware specific files for them to setup
3757  * any hardware specific handlers as well.
3758  */
3759 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3760 {
3761         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3762         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3763         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3764         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3765         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3766             iwl3945_rx_spectrum_measure_notif;
3767         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3768         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3769             iwl3945_rx_pm_debug_statistics_notif;
3770         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3771
3772         /*
3773          * The same handler is used for both the REPLY to a discrete
3774          * statistics request from the host as well as for the periodic
3775          * statistics notifications (after received beacons) from the uCode.
3776          */
3777         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3778         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3779
3780         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3781         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3782         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3783             iwl3945_rx_scan_results_notif;
3784         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3785             iwl3945_rx_scan_complete_notif;
3786         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3787         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
3788
3789         /* Set up hardware specific Rx handlers */
3790         iwl3945_hw_rx_handler_setup(priv);
3791 }
3792
3793 /**
3794  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3795  * @rxb: Rx buffer to reclaim
3796  *
3797  * If an Rx buffer has an async callback associated with it the callback
3798  * will be executed.  The attached skb (if present) will only be freed
3799  * if the callback returns 1
3800  */
3801 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3802                                 struct iwl3945_rx_mem_buffer *rxb)
3803 {
3804         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3805         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3806         int txq_id = SEQ_TO_QUEUE(sequence);
3807         int index = SEQ_TO_INDEX(sequence);
3808         int huge = sequence & SEQ_HUGE_FRAME;
3809         int cmd_index;
3810         struct iwl3945_cmd *cmd;
3811
3812         /* If a Tx command is being handled and it isn't in the actual
3813          * command queue then there a command routing bug has been introduced
3814          * in the queue management code. */
3815         if (txq_id != IWL_CMD_QUEUE_NUM)
3816                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3817                           txq_id, pkt->hdr.cmd);
3818         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3819
3820         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3821         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3822
3823         /* Input error checking is done when commands are added to queue. */
3824         if (cmd->meta.flags & CMD_WANT_SKB) {
3825                 cmd->meta.source->u.skb = rxb->skb;
3826                 rxb->skb = NULL;
3827         } else if (cmd->meta.u.callback &&
3828                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3829                 rxb->skb = NULL;
3830
3831         iwl3945_tx_queue_reclaim(priv, txq_id, index);
3832
3833         if (!(cmd->meta.flags & CMD_ASYNC)) {
3834                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3835                 wake_up_interruptible(&priv->wait_command_queue);
3836         }
3837 }
3838
3839 /************************** RX-FUNCTIONS ****************************/
3840 /*
3841  * Rx theory of operation
3842  *
3843  * The host allocates 32 DMA target addresses and passes the host address
3844  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3845  * 0 to 31
3846  *
3847  * Rx Queue Indexes
3848  * The host/firmware share two index registers for managing the Rx buffers.
3849  *
3850  * The READ index maps to the first position that the firmware may be writing
3851  * to -- the driver can read up to (but not including) this position and get
3852  * good data.
3853  * The READ index is managed by the firmware once the card is enabled.
3854  *
3855  * The WRITE index maps to the last position the driver has read from -- the
3856  * position preceding WRITE is the last slot the firmware can place a packet.
3857  *
3858  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3859  * WRITE = READ.
3860  *
3861  * During initialization, the host sets up the READ queue position to the first
3862  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3863  *
3864  * When the firmware places a packet in a buffer, it will advance the READ index
3865  * and fire the RX interrupt.  The driver can then query the READ index and
3866  * process as many packets as possible, moving the WRITE index forward as it
3867  * resets the Rx queue buffers with new memory.
3868  *
3869  * The management in the driver is as follows:
3870  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3871  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3872  *   to replenish the iwl->rxq->rx_free.
3873  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3874  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3875  *   'processed' and 'read' driver indexes as well)
3876  * + A received packet is processed and handed to the kernel network stack,
3877  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3878  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3879  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3880  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3881  *   were enough free buffers and RX_STALLED is set it is cleared.
3882  *
3883  *
3884  * Driver sequence:
3885  *
3886  * iwl3945_rx_queue_alloc()   Allocates rx_free
3887  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3888  *                            iwl3945_rx_queue_restock
3889  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3890  *                            queue, updates firmware pointers, and updates
3891  *                            the WRITE index.  If insufficient rx_free buffers
3892  *                            are available, schedules iwl3945_rx_replenish
3893  *
3894  * -- enable interrupts --
3895  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3896  *                            READ INDEX, detaching the SKB from the pool.
3897  *                            Moves the packet buffer from queue to rx_used.
3898  *                            Calls iwl3945_rx_queue_restock to refill any empty
3899  *                            slots.
3900  * ...
3901  *
3902  */
3903
3904 /**
3905  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3906  */
3907 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3908 {
3909         int s = q->read - q->write;
3910         if (s <= 0)
3911                 s += RX_QUEUE_SIZE;
3912         /* keep some buffer to not confuse full and empty queue */
3913         s -= 2;
3914         if (s < 0)
3915                 s = 0;
3916         return s;
3917 }
3918
3919 /**
3920  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3921  */
3922 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3923 {
3924         u32 reg = 0;
3925         int rc = 0;
3926         unsigned long flags;
3927
3928         spin_lock_irqsave(&q->lock, flags);
3929
3930         if (q->need_update == 0)
3931                 goto exit_unlock;
3932
3933         /* If power-saving is in use, make sure device is awake */
3934         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3935                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3936
3937                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3938                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3939                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3940                         goto exit_unlock;
3941                 }
3942
3943                 rc = iwl3945_grab_nic_access(priv);
3944                 if (rc)
3945                         goto exit_unlock;
3946
3947                 /* Device expects a multiple of 8 */
3948                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3949                                      q->write & ~0x7);
3950                 iwl3945_release_nic_access(priv);
3951
3952         /* Else device is assumed to be awake */
3953         } else
3954                 /* Device expects a multiple of 8 */
3955                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3956
3957
3958         q->need_update = 0;
3959
3960  exit_unlock:
3961         spin_unlock_irqrestore(&q->lock, flags);
3962         return rc;
3963 }
3964
3965 /**
3966  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3967  */
3968 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3969                                           dma_addr_t dma_addr)
3970 {
3971         return cpu_to_le32((u32)dma_addr);
3972 }
3973
3974 /**
3975  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3976  *
3977  * If there are slots in the RX queue that need to be restocked,
3978  * and we have free pre-allocated buffers, fill the ranks as much
3979  * as we can, pulling from rx_free.
3980  *
3981  * This moves the 'write' index forward to catch up with 'processed', and
3982  * also updates the memory address in the firmware to reference the new
3983  * target buffer.
3984  */
3985 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3986 {
3987         struct iwl3945_rx_queue *rxq = &priv->rxq;
3988         struct list_head *element;
3989         struct iwl3945_rx_mem_buffer *rxb;
3990         unsigned long flags;
3991         int write, rc;
3992
3993         spin_lock_irqsave(&rxq->lock, flags);
3994         write = rxq->write & ~0x7;
3995         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3996                 /* Get next free Rx buffer, remove from free list */
3997                 element = rxq->rx_free.next;
3998                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3999                 list_del(element);
4000
4001                 /* Point to Rx buffer via next RBD in circular buffer */
4002                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4003                 rxq->queue[rxq->write] = rxb;
4004                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4005                 rxq->free_count--;
4006         }
4007         spin_unlock_irqrestore(&rxq->lock, flags);
4008         /* If the pre-allocated buffer pool is dropping low, schedule to
4009          * refill it */
4010         if (rxq->free_count <= RX_LOW_WATERMARK)
4011                 queue_work(priv->workqueue, &priv->rx_replenish);
4012
4013
4014         /* If we've added more space for the firmware to place data, tell it.
4015          * Increment device's write pointer in multiples of 8. */
4016         if ((write != (rxq->write & ~0x7))
4017             || (abs(rxq->write - rxq->read) > 7)) {
4018                 spin_lock_irqsave(&rxq->lock, flags);
4019                 rxq->need_update = 1;
4020                 spin_unlock_irqrestore(&rxq->lock, flags);
4021                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
4022                 if (rc)
4023                         return rc;
4024         }
4025
4026         return 0;
4027 }
4028
4029 /**
4030  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
4031  *
4032  * When moving to rx_free an SKB is allocated for the slot.
4033  *
4034  * Also restock the Rx queue via iwl3945_rx_queue_restock.
4035  * This is called as a scheduled work item (except for during initialization)
4036  */
4037 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
4038 {
4039         struct iwl3945_rx_queue *rxq = &priv->rxq;
4040         struct list_head *element;
4041         struct iwl3945_rx_mem_buffer *rxb;
4042         unsigned long flags;
4043         spin_lock_irqsave(&rxq->lock, flags);
4044         while (!list_empty(&rxq->rx_used)) {
4045                 element = rxq->rx_used.next;
4046                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
4047
4048                 /* Alloc a new receive buffer */
4049                 rxb->skb =
4050                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4051                 if (!rxb->skb) {
4052                         if (net_ratelimit())
4053                                 printk(KERN_CRIT DRV_NAME
4054                                        ": Can not allocate SKB buffers\n");
4055                         /* We don't reschedule replenish work here -- we will
4056                          * call the restock method and if it still needs
4057                          * more buffers it will schedule replenish */
4058                         break;
4059                 }
4060
4061                 /* If radiotap head is required, reserve some headroom here.
4062                  * The physical head count is a variable rx_stats->phy_count.
4063                  * We reserve 4 bytes here. Plus these extra bytes, the
4064                  * headroom of the physical head should be enough for the
4065                  * radiotap head that iwl3945 supported. See iwl3945_rt.
4066                  */
4067                 skb_reserve(rxb->skb, 4);
4068
4069                 priv->alloc_rxb_skb++;
4070                 list_del(element);
4071
4072                 /* Get physical address of RB/SKB */
4073                 rxb->dma_addr =
4074                     pci_map_single(priv->pci_dev, rxb->skb->data,
4075                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4076                 list_add_tail(&rxb->list, &rxq->rx_free);
4077                 rxq->free_count++;
4078         }
4079         spin_unlock_irqrestore(&rxq->lock, flags);
4080 }
4081
4082 /*
4083  * this should be called while priv->lock is locked
4084  */
4085 static void __iwl3945_rx_replenish(void *data)
4086 {
4087         struct iwl3945_priv *priv = data;
4088
4089         iwl3945_rx_allocate(priv);
4090         iwl3945_rx_queue_restock(priv);
4091 }
4092
4093
4094 void iwl3945_rx_replenish(void *data)
4095 {
4096         struct iwl3945_priv *priv = data;
4097         unsigned long flags;
4098
4099         iwl3945_rx_allocate(priv);
4100
4101         spin_lock_irqsave(&priv->lock, flags);
4102         iwl3945_rx_queue_restock(priv);
4103         spin_unlock_irqrestore(&priv->lock, flags);
4104 }
4105
4106 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4107  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4108  * This free routine walks the list of POOL entries and if SKB is set to
4109  * non NULL it is unmapped and freed
4110  */
4111 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4112 {
4113         int i;
4114         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4115                 if (rxq->pool[i].skb != NULL) {
4116                         pci_unmap_single(priv->pci_dev,
4117                                          rxq->pool[i].dma_addr,
4118                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4119                         dev_kfree_skb(rxq->pool[i].skb);
4120                 }
4121         }
4122
4123         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4124                             rxq->dma_addr);
4125         rxq->bd = NULL;
4126 }
4127
4128 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
4129 {
4130         struct iwl3945_rx_queue *rxq = &priv->rxq;
4131         struct pci_dev *dev = priv->pci_dev;
4132         int i;
4133
4134         spin_lock_init(&rxq->lock);
4135         INIT_LIST_HEAD(&rxq->rx_free);
4136         INIT_LIST_HEAD(&rxq->rx_used);
4137
4138         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4139         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4140         if (!rxq->bd)
4141                 return -ENOMEM;
4142
4143         /* Fill the rx_used queue with _all_ of the Rx buffers */
4144         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4145                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4146
4147         /* Set us so that we have processed and used all buffers, but have
4148          * not restocked the Rx queue with fresh buffers */
4149         rxq->read = rxq->write = 0;
4150         rxq->free_count = 0;
4151         rxq->need_update = 0;
4152         return 0;
4153 }
4154
4155 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4156 {
4157         unsigned long flags;
4158         int i;
4159         spin_lock_irqsave(&rxq->lock, flags);
4160         INIT_LIST_HEAD(&rxq->rx_free);
4161         INIT_LIST_HEAD(&rxq->rx_used);
4162         /* Fill the rx_used queue with _all_ of the Rx buffers */
4163         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4164                 /* In the reset function, these buffers may have been allocated
4165                  * to an SKB, so we need to unmap and free potential storage */
4166                 if (rxq->pool[i].skb != NULL) {
4167                         pci_unmap_single(priv->pci_dev,
4168                                          rxq->pool[i].dma_addr,
4169                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4170                         priv->alloc_rxb_skb--;
4171                         dev_kfree_skb(rxq->pool[i].skb);
4172                         rxq->pool[i].skb = NULL;
4173                 }
4174                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4175         }
4176
4177         /* Set us so that we have processed and used all buffers, but have
4178          * not restocked the Rx queue with fresh buffers */
4179         rxq->read = rxq->write = 0;
4180         rxq->free_count = 0;
4181         spin_unlock_irqrestore(&rxq->lock, flags);
4182 }
4183
4184 /* Convert linear signal-to-noise ratio into dB */
4185 static u8 ratio2dB[100] = {
4186 /*       0   1   2   3   4   5   6   7   8   9 */
4187          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4188         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4189         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4190         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4191         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4192         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4193         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4194         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4195         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4196         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4197 };
4198
4199 /* Calculates a relative dB value from a ratio of linear
4200  *   (i.e. not dB) signal levels.
4201  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4202 int iwl3945_calc_db_from_ratio(int sig_ratio)
4203 {
4204         /* 1000:1 or higher just report as 60 dB */
4205         if (sig_ratio >= 1000)
4206                 return 60;
4207
4208         /* 100:1 or higher, divide by 10 and use table,
4209          *   add 20 dB to make up for divide by 10 */
4210         if (sig_ratio >= 100)
4211                 return (20 + (int)ratio2dB[sig_ratio/10]);
4212
4213         /* We shouldn't see this */
4214         if (sig_ratio < 1)
4215                 return 0;
4216
4217         /* Use table for ratios 1:1 - 99:1 */
4218         return (int)ratio2dB[sig_ratio];
4219 }
4220
4221 #define PERFECT_RSSI (-20) /* dBm */
4222 #define WORST_RSSI (-95)   /* dBm */
4223 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4224
4225 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4226  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4227  *   about formulas used below. */
4228 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
4229 {
4230         int sig_qual;
4231         int degradation = PERFECT_RSSI - rssi_dbm;
4232
4233         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4234          * as indicator; formula is (signal dbm - noise dbm).
4235          * SNR at or above 40 is a great signal (100%).
4236          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4237          * Weakest usable signal is usually 10 - 15 dB SNR. */
4238         if (noise_dbm) {
4239                 if (rssi_dbm - noise_dbm >= 40)
4240                         return 100;
4241                 else if (rssi_dbm < noise_dbm)
4242                         return 0;
4243                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4244
4245         /* Else use just the signal level.
4246          * This formula is a least squares fit of data points collected and
4247          *   compared with a reference system that had a percentage (%) display
4248          *   for signal quality. */
4249         } else
4250                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4251                             (15 * RSSI_RANGE + 62 * degradation)) /
4252                            (RSSI_RANGE * RSSI_RANGE);
4253
4254         if (sig_qual > 100)
4255                 sig_qual = 100;
4256         else if (sig_qual < 1)
4257                 sig_qual = 0;
4258
4259         return sig_qual;
4260 }
4261
4262 /**
4263  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
4264  *
4265  * Uses the priv->rx_handlers callback function array to invoke
4266  * the appropriate handlers, including command responses,
4267  * frame-received notifications, and other notifications.
4268  */
4269 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
4270 {
4271         struct iwl3945_rx_mem_buffer *rxb;
4272         struct iwl3945_rx_packet *pkt;
4273         struct iwl3945_rx_queue *rxq = &priv->rxq;
4274         u32 r, i;
4275         int reclaim;
4276         unsigned long flags;
4277         u8 fill_rx = 0;
4278         u32 count = 8;
4279
4280         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4281          * buffer that the driver may process (last buffer filled by ucode). */
4282         r = iwl3945_hw_get_rx_read(priv);
4283         i = rxq->read;
4284
4285         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4286                 fill_rx = 1;
4287         /* Rx interrupt, but nothing sent from uCode */
4288         if (i == r)
4289                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4290
4291         while (i != r) {
4292                 rxb = rxq->queue[i];
4293
4294                 /* If an RXB doesn't have a Rx queue slot associated with it,
4295                  * then a bug has been introduced in the queue refilling
4296                  * routines -- catch it here */
4297                 BUG_ON(rxb == NULL);
4298
4299                 rxq->queue[i] = NULL;
4300
4301                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4302                                             IWL_RX_BUF_SIZE,
4303                                             PCI_DMA_FROMDEVICE);
4304                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4305
4306                 /* Reclaim a command buffer only if this packet is a response
4307                  *   to a (driver-originated) command.
4308                  * If the packet (e.g. Rx frame) originated from uCode,
4309                  *   there is no command buffer to reclaim.
4310                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4311                  *   but apparently a few don't get set; catch them here. */
4312                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4313                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4314                         (pkt->hdr.cmd != REPLY_TX);
4315
4316                 /* Based on type of command response or notification,
4317                  *   handle those that need handling via function in
4318                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4319                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4320                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4321                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4322                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4323                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4324                 } else {
4325                         /* No handling needed */
4326                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4327                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4328                                 r, i, get_cmd_string(pkt->hdr.cmd),
4329                                 pkt->hdr.cmd);
4330                 }
4331
4332                 if (reclaim) {
4333                         /* Invoke any callbacks, transfer the skb to caller, and
4334                          * fire off the (possibly) blocking iwl3945_send_cmd()
4335                          * as we reclaim the driver command queue */
4336                         if (rxb && rxb->skb)
4337                                 iwl3945_tx_cmd_complete(priv, rxb);
4338                         else
4339                                 IWL_WARNING("Claim null rxb?\n");
4340                 }
4341
4342                 /* For now we just don't re-use anything.  We can tweak this
4343                  * later to try and re-use notification packets and SKBs that
4344                  * fail to Rx correctly */
4345                 if (rxb->skb != NULL) {
4346                         priv->alloc_rxb_skb--;
4347                         dev_kfree_skb_any(rxb->skb);
4348                         rxb->skb = NULL;
4349                 }
4350
4351                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4352                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4353                 spin_lock_irqsave(&rxq->lock, flags);
4354                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4355                 spin_unlock_irqrestore(&rxq->lock, flags);
4356                 i = (i + 1) & RX_QUEUE_MASK;
4357                 /* If there are a lot of unused frames,
4358                  * restock the Rx queue so ucode won't assert. */
4359                 if (fill_rx) {
4360                         count++;
4361                         if (count >= 8) {
4362                                 priv->rxq.read = i;
4363                                 __iwl3945_rx_replenish(priv);
4364                                 count = 0;
4365                         }
4366                 }
4367         }
4368
4369         /* Backtrack one entry */
4370         priv->rxq.read = i;
4371         iwl3945_rx_queue_restock(priv);
4372 }
4373
4374 /**
4375  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4376  */
4377 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4378                                   struct iwl3945_tx_queue *txq)
4379 {
4380         u32 reg = 0;
4381         int rc = 0;
4382         int txq_id = txq->q.id;
4383
4384         if (txq->need_update == 0)
4385                 return rc;
4386
4387         /* if we're trying to save power */
4388         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4389                 /* wake up nic if it's powered down ...
4390                  * uCode will wake up, and interrupt us again, so next
4391                  * time we'll skip this part. */
4392                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4393
4394                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4395                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4396                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4397                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4398                         return rc;
4399                 }
4400
4401                 /* restore this queue's parameters in nic hardware. */
4402                 rc = iwl3945_grab_nic_access(priv);
4403                 if (rc)
4404                         return rc;
4405                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4406                                      txq->q.write_ptr | (txq_id << 8));
4407                 iwl3945_release_nic_access(priv);
4408
4409         /* else not in power-save mode, uCode will never sleep when we're
4410          * trying to tx (during RFKILL, we're not trying to tx). */
4411         } else
4412                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4413                             txq->q.write_ptr | (txq_id << 8));
4414
4415         txq->need_update = 0;
4416
4417         return rc;
4418 }
4419
4420 #ifdef CONFIG_IWL3945_DEBUG
4421 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4422 {
4423         DECLARE_MAC_BUF(mac);
4424
4425         IWL_DEBUG_RADIO("RX CONFIG:\n");
4426         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4427         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4428         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4429         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4430                         le32_to_cpu(rxon->filter_flags));
4431         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4432         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4433                         rxon->ofdm_basic_rates);
4434         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4435         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4436                         print_mac(mac, rxon->node_addr));
4437         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4438                         print_mac(mac, rxon->bssid_addr));
4439         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4440 }
4441 #endif
4442
4443 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4444 {
4445         IWL_DEBUG_ISR("Enabling interrupts\n");
4446         set_bit(STATUS_INT_ENABLED, &priv->status);
4447         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4448 }
4449
4450 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4451 {
4452         clear_bit(STATUS_INT_ENABLED, &priv->status);
4453
4454         /* disable interrupts from uCode/NIC to host */
4455         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4456
4457         /* acknowledge/clear/reset any interrupts still pending
4458          * from uCode or flow handler (Rx/Tx DMA) */
4459         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4460         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4461         IWL_DEBUG_ISR("Disabled interrupts\n");
4462 }
4463
4464 static const char *desc_lookup(int i)
4465 {
4466         switch (i) {
4467         case 1:
4468                 return "FAIL";
4469         case 2:
4470                 return "BAD_PARAM";
4471         case 3:
4472                 return "BAD_CHECKSUM";
4473         case 4:
4474                 return "NMI_INTERRUPT";
4475         case 5:
4476                 return "SYSASSERT";
4477         case 6:
4478                 return "FATAL_ERROR";
4479         }
4480
4481         return "UNKNOWN";
4482 }
4483
4484 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4485 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4486
4487 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4488 {
4489         u32 i;
4490         u32 desc, time, count, base, data1;
4491         u32 blink1, blink2, ilink1, ilink2;
4492         int rc;
4493
4494         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4495
4496         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4497                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4498                 return;
4499         }
4500
4501         rc = iwl3945_grab_nic_access(priv);
4502         if (rc) {
4503                 IWL_WARNING("Can not read from adapter at this time.\n");
4504                 return;
4505         }
4506
4507         count = iwl3945_read_targ_mem(priv, base);
4508
4509         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4510                 IWL_ERROR("Start IWL Error Log Dump:\n");
4511                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4512                           priv->status, priv->config, count);
4513         }
4514
4515         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4516                   "ilink1  nmiPC   Line\n");
4517         for (i = ERROR_START_OFFSET;
4518              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4519              i += ERROR_ELEM_SIZE) {
4520                 desc = iwl3945_read_targ_mem(priv, base + i);
4521                 time =
4522                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4523                 blink1 =
4524                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4525                 blink2 =
4526                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4527                 ilink1 =
4528                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4529                 ilink2 =
4530                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4531                 data1 =
4532                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4533
4534                 IWL_ERROR
4535                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4536                      desc_lookup(desc), desc, time, blink1, blink2,
4537                      ilink1, ilink2, data1);
4538         }
4539
4540         iwl3945_release_nic_access(priv);
4541
4542 }
4543
4544 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4545
4546 /**
4547  * iwl3945_print_event_log - Dump error event log to syslog
4548  *
4549  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4550  */
4551 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4552                                 u32 num_events, u32 mode)
4553 {
4554         u32 i;
4555         u32 base;       /* SRAM byte address of event log header */
4556         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4557         u32 ptr;        /* SRAM byte address of log data */
4558         u32 ev, time, data; /* event log data */
4559
4560         if (num_events == 0)
4561                 return;
4562
4563         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4564
4565         if (mode == 0)
4566                 event_size = 2 * sizeof(u32);
4567         else
4568                 event_size = 3 * sizeof(u32);
4569
4570         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4571
4572         /* "time" is actually "data" for mode 0 (no timestamp).
4573          * place event id # at far right for easier visual parsing. */
4574         for (i = 0; i < num_events; i++) {
4575                 ev = iwl3945_read_targ_mem(priv, ptr);
4576                 ptr += sizeof(u32);
4577                 time = iwl3945_read_targ_mem(priv, ptr);
4578                 ptr += sizeof(u32);
4579                 if (mode == 0)
4580                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4581                 else {
4582                         data = iwl3945_read_targ_mem(priv, ptr);
4583                         ptr += sizeof(u32);
4584                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4585                 }
4586         }
4587 }
4588
4589 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4590 {
4591         int rc;
4592         u32 base;       /* SRAM byte address of event log header */
4593         u32 capacity;   /* event log capacity in # entries */
4594         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4595         u32 num_wraps;  /* # times uCode wrapped to top of log */
4596         u32 next_entry; /* index of next entry to be written by uCode */
4597         u32 size;       /* # entries that we'll print */
4598
4599         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4600         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4601                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4602                 return;
4603         }
4604
4605         rc = iwl3945_grab_nic_access(priv);
4606         if (rc) {
4607                 IWL_WARNING("Can not read from adapter at this time.\n");
4608                 return;
4609         }
4610
4611         /* event log header */
4612         capacity = iwl3945_read_targ_mem(priv, base);
4613         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4614         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4615         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4616
4617         size = num_wraps ? capacity : next_entry;
4618
4619         /* bail out if nothing in log */
4620         if (size == 0) {
4621                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4622                 iwl3945_release_nic_access(priv);
4623                 return;
4624         }
4625
4626         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4627                   size, num_wraps);
4628
4629         /* if uCode has wrapped back to top of log, start at the oldest entry,
4630          * i.e the next one that uCode would fill. */
4631         if (num_wraps)
4632                 iwl3945_print_event_log(priv, next_entry,
4633                                     capacity - next_entry, mode);
4634
4635         /* (then/else) start at top of log */
4636         iwl3945_print_event_log(priv, 0, next_entry, mode);
4637
4638         iwl3945_release_nic_access(priv);
4639 }
4640
4641 /**
4642  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4643  */
4644 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4645 {
4646         /* Set the FW error flag -- cleared on iwl3945_down */
4647         set_bit(STATUS_FW_ERROR, &priv->status);
4648
4649         /* Cancel currently queued command. */
4650         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4651
4652 #ifdef CONFIG_IWL3945_DEBUG
4653         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4654                 iwl3945_dump_nic_error_log(priv);
4655                 iwl3945_dump_nic_event_log(priv);
4656                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4657         }
4658 #endif
4659
4660         wake_up_interruptible(&priv->wait_command_queue);
4661
4662         /* Keep the restart process from trying to send host
4663          * commands by clearing the INIT status bit */
4664         clear_bit(STATUS_READY, &priv->status);
4665
4666         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4667                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4668                           "Restarting adapter due to uCode error.\n");
4669
4670                 if (iwl3945_is_associated(priv)) {
4671                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4672                                sizeof(priv->recovery_rxon));
4673                         priv->error_recovering = 1;
4674                 }
4675                 queue_work(priv->workqueue, &priv->restart);
4676         }
4677 }
4678
4679 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4680 {
4681         unsigned long flags;
4682
4683         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4684                sizeof(priv->staging_rxon));
4685         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4686         iwl3945_commit_rxon(priv);
4687
4688         iwl3945_add_station(priv, priv->bssid, 1, 0);
4689
4690         spin_lock_irqsave(&priv->lock, flags);
4691         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4692         priv->error_recovering = 0;
4693         spin_unlock_irqrestore(&priv->lock, flags);
4694 }
4695
4696 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4697 {
4698         u32 inta, handled = 0;
4699         u32 inta_fh;
4700         unsigned long flags;
4701 #ifdef CONFIG_IWL3945_DEBUG
4702         u32 inta_mask;
4703 #endif
4704
4705         spin_lock_irqsave(&priv->lock, flags);
4706
4707         /* Ack/clear/reset pending uCode interrupts.
4708          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4709          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4710         inta = iwl3945_read32(priv, CSR_INT);
4711         iwl3945_write32(priv, CSR_INT, inta);
4712
4713         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4714          * Any new interrupts that happen after this, either while we're
4715          * in this tasklet, or later, will show up in next ISR/tasklet. */
4716         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4717         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4718
4719 #ifdef CONFIG_IWL3945_DEBUG
4720         if (iwl3945_debug_level & IWL_DL_ISR) {
4721                 /* just for debug */
4722                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4723                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4724                               inta, inta_mask, inta_fh);
4725         }
4726 #endif
4727
4728         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4729          * atomic, make sure that inta covers all the interrupts that
4730          * we've discovered, even if FH interrupt came in just after
4731          * reading CSR_INT. */
4732         if (inta_fh & CSR_FH_INT_RX_MASK)
4733                 inta |= CSR_INT_BIT_FH_RX;
4734         if (inta_fh & CSR_FH_INT_TX_MASK)
4735                 inta |= CSR_INT_BIT_FH_TX;
4736
4737         /* Now service all interrupt bits discovered above. */
4738         if (inta & CSR_INT_BIT_HW_ERR) {
4739                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4740
4741                 /* Tell the device to stop sending interrupts */
4742                 iwl3945_disable_interrupts(priv);
4743
4744                 iwl3945_irq_handle_error(priv);
4745
4746                 handled |= CSR_INT_BIT_HW_ERR;
4747
4748                 spin_unlock_irqrestore(&priv->lock, flags);
4749
4750                 return;
4751         }
4752
4753 #ifdef CONFIG_IWL3945_DEBUG
4754         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4755                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4756                 if (inta & CSR_INT_BIT_SCD)
4757                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4758                                       "the frame/frames.\n");
4759
4760                 /* Alive notification via Rx interrupt will do the real work */
4761                 if (inta & CSR_INT_BIT_ALIVE)
4762                         IWL_DEBUG_ISR("Alive interrupt\n");
4763         }
4764 #endif
4765         /* Safely ignore these bits for debug checks below */
4766         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4767
4768         /* HW RF KILL switch toggled (4965 only) */
4769         if (inta & CSR_INT_BIT_RF_KILL) {
4770                 int hw_rf_kill = 0;
4771                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4772                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4773                         hw_rf_kill = 1;
4774
4775                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4776                                 "RF_KILL bit toggled to %s.\n",
4777                                 hw_rf_kill ? "disable radio":"enable radio");
4778
4779                 /* Queue restart only if RF_KILL switch was set to "kill"
4780                  *   when we loaded driver, and is now set to "enable".
4781                  * After we're Alive, RF_KILL gets handled by
4782                  *   iwl_rx_card_state_notif() */
4783                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4784                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4785                         queue_work(priv->workqueue, &priv->restart);
4786                 }
4787
4788                 handled |= CSR_INT_BIT_RF_KILL;
4789         }
4790
4791         /* Chip got too hot and stopped itself (4965 only) */
4792         if (inta & CSR_INT_BIT_CT_KILL) {
4793                 IWL_ERROR("Microcode CT kill error detected.\n");
4794                 handled |= CSR_INT_BIT_CT_KILL;
4795         }
4796
4797         /* Error detected by uCode */
4798         if (inta & CSR_INT_BIT_SW_ERR) {
4799                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4800                           inta);
4801                 iwl3945_irq_handle_error(priv);
4802                 handled |= CSR_INT_BIT_SW_ERR;
4803         }
4804
4805         /* uCode wakes up after power-down sleep */
4806         if (inta & CSR_INT_BIT_WAKEUP) {
4807                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4808                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4809                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4810                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4811                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4812                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4813                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4814                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4815
4816                 handled |= CSR_INT_BIT_WAKEUP;
4817         }
4818
4819         /* All uCode command responses, including Tx command responses,
4820          * Rx "responses" (frame-received notification), and other
4821          * notifications from uCode come through here*/
4822         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4823                 iwl3945_rx_handle(priv);
4824                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4825         }
4826
4827         if (inta & CSR_INT_BIT_FH_TX) {
4828                 IWL_DEBUG_ISR("Tx interrupt\n");
4829
4830                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4831                 if (!iwl3945_grab_nic_access(priv)) {
4832                         iwl3945_write_direct32(priv,
4833                                              FH_TCSR_CREDIT
4834                                              (ALM_FH_SRVC_CHNL), 0x0);
4835                         iwl3945_release_nic_access(priv);
4836                 }
4837                 handled |= CSR_INT_BIT_FH_TX;
4838         }
4839
4840         if (inta & ~handled)
4841                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4842
4843         if (inta & ~CSR_INI_SET_MASK) {
4844                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4845                          inta & ~CSR_INI_SET_MASK);
4846                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4847         }
4848
4849         /* Re-enable all interrupts */
4850         iwl3945_enable_interrupts(priv);
4851
4852 #ifdef CONFIG_IWL3945_DEBUG
4853         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4854                 inta = iwl3945_read32(priv, CSR_INT);
4855                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4856                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4857                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4858                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4859         }
4860 #endif
4861         spin_unlock_irqrestore(&priv->lock, flags);
4862 }
4863
4864 static irqreturn_t iwl3945_isr(int irq, void *data)
4865 {
4866         struct iwl3945_priv *priv = data;
4867         u32 inta, inta_mask;
4868         u32 inta_fh;
4869         if (!priv)
4870                 return IRQ_NONE;
4871
4872         spin_lock(&priv->lock);
4873
4874         /* Disable (but don't clear!) interrupts here to avoid
4875          *    back-to-back ISRs and sporadic interrupts from our NIC.
4876          * If we have something to service, the tasklet will re-enable ints.
4877          * If we *don't* have something, we'll re-enable before leaving here. */
4878         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4879         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4880
4881         /* Discover which interrupts are active/pending */
4882         inta = iwl3945_read32(priv, CSR_INT);
4883         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4884
4885         /* Ignore interrupt if there's nothing in NIC to service.
4886          * This may be due to IRQ shared with another device,
4887          * or due to sporadic interrupts thrown from our NIC. */
4888         if (!inta && !inta_fh) {
4889                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4890                 goto none;
4891         }
4892
4893         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4894                 /* Hardware disappeared */
4895                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4896                 goto unplugged;
4897         }
4898
4899         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4900                       inta, inta_mask, inta_fh);
4901
4902         inta &= ~CSR_INT_BIT_SCD;
4903
4904         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4905         if (likely(inta || inta_fh))
4906                 tasklet_schedule(&priv->irq_tasklet);
4907 unplugged:
4908         spin_unlock(&priv->lock);
4909
4910         return IRQ_HANDLED;
4911
4912  none:
4913         /* re-enable interrupts here since we don't have anything to service. */
4914         iwl3945_enable_interrupts(priv);
4915         spin_unlock(&priv->lock);
4916         return IRQ_NONE;
4917 }
4918
4919 /************************** EEPROM BANDS ****************************
4920  *
4921  * The iwl3945_eeprom_band definitions below provide the mapping from the
4922  * EEPROM contents to the specific channel number supported for each
4923  * band.
4924  *
4925  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4926  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4927  * The specific geography and calibration information for that channel
4928  * is contained in the eeprom map itself.
4929  *
4930  * During init, we copy the eeprom information and channel map
4931  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4932  *
4933  * channel_map_24/52 provides the index in the channel_info array for a
4934  * given channel.  We have to have two separate maps as there is channel
4935  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4936  * band_2
4937  *
4938  * A value of 0xff stored in the channel_map indicates that the channel
4939  * is not supported by the hardware at all.
4940  *
4941  * A value of 0xfe in the channel_map indicates that the channel is not
4942  * valid for Tx with the current hardware.  This means that
4943  * while the system can tune and receive on a given channel, it may not
4944  * be able to associate or transmit any frames on that
4945  * channel.  There is no corresponding channel information for that
4946  * entry.
4947  *
4948  *********************************************************************/
4949
4950 /* 2.4 GHz */
4951 static const u8 iwl3945_eeprom_band_1[14] = {
4952         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4953 };
4954
4955 /* 5.2 GHz bands */
4956 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4957         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4958 };
4959
4960 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4961         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4962 };
4963
4964 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4965         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4966 };
4967
4968 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4969         145, 149, 153, 157, 161, 165
4970 };
4971
4972 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4973                                     int *eeprom_ch_count,
4974                                     const struct iwl3945_eeprom_channel
4975                                     **eeprom_ch_info,
4976                                     const u8 **eeprom_ch_index)
4977 {
4978         switch (band) {
4979         case 1:         /* 2.4GHz band */
4980                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4981                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4982                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4983                 break;
4984         case 2:         /* 4.9GHz band */
4985                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4986                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4987                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4988                 break;
4989         case 3:         /* 5.2GHz band */
4990                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4991                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4992                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4993                 break;
4994         case 4:         /* 5.5GHz band */
4995                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4996                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4997                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4998                 break;
4999         case 5:         /* 5.7GHz band */
5000                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
5001                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5002                 *eeprom_ch_index = iwl3945_eeprom_band_5;
5003                 break;
5004         default:
5005                 BUG();
5006                 return;
5007         }
5008 }
5009
5010 /**
5011  * iwl3945_get_channel_info - Find driver's private channel info
5012  *
5013  * Based on band and channel number.
5014  */
5015 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
5016                                                     enum ieee80211_band band, u16 channel)
5017 {
5018         int i;
5019
5020         switch (band) {
5021         case IEEE80211_BAND_5GHZ:
5022                 for (i = 14; i < priv->channel_count; i++) {
5023                         if (priv->channel_info[i].channel == channel)
5024                                 return &priv->channel_info[i];
5025                 }
5026                 break;
5027
5028         case IEEE80211_BAND_2GHZ:
5029                 if (channel >= 1 && channel <= 14)
5030                         return &priv->channel_info[channel - 1];
5031                 break;
5032         case IEEE80211_NUM_BANDS:
5033                 WARN_ON(1);
5034         }
5035
5036         return NULL;
5037 }
5038
5039 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5040                             ? # x " " : "")
5041
5042 /**
5043  * iwl3945_init_channel_map - Set up driver's info for all possible channels
5044  */
5045 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
5046 {
5047         int eeprom_ch_count = 0;
5048         const u8 *eeprom_ch_index = NULL;
5049         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
5050         int band, ch;
5051         struct iwl3945_channel_info *ch_info;
5052
5053         if (priv->channel_count) {
5054                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5055                 return 0;
5056         }
5057
5058         if (priv->eeprom.version < 0x2f) {
5059                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5060                             priv->eeprom.version);
5061                 return -EINVAL;
5062         }
5063
5064         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5065
5066         priv->channel_count =
5067             ARRAY_SIZE(iwl3945_eeprom_band_1) +
5068             ARRAY_SIZE(iwl3945_eeprom_band_2) +
5069             ARRAY_SIZE(iwl3945_eeprom_band_3) +
5070             ARRAY_SIZE(iwl3945_eeprom_band_4) +
5071             ARRAY_SIZE(iwl3945_eeprom_band_5);
5072
5073         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5074
5075         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
5076                                      priv->channel_count, GFP_KERNEL);
5077         if (!priv->channel_info) {
5078                 IWL_ERROR("Could not allocate channel_info\n");
5079                 priv->channel_count = 0;
5080                 return -ENOMEM;
5081         }
5082
5083         ch_info = priv->channel_info;
5084
5085         /* Loop through the 5 EEPROM bands adding them in order to the
5086          * channel map we maintain (that contains additional information than
5087          * what just in the EEPROM) */
5088         for (band = 1; band <= 5; band++) {
5089
5090                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
5091                                         &eeprom_ch_info, &eeprom_ch_index);
5092
5093                 /* Loop through each band adding each of the channels */
5094                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5095                         ch_info->channel = eeprom_ch_index[ch];
5096                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
5097                             IEEE80211_BAND_5GHZ;
5098
5099                         /* permanently store EEPROM's channel regulatory flags
5100                          *   and max power in channel info database. */
5101                         ch_info->eeprom = eeprom_ch_info[ch];
5102
5103                         /* Copy the run-time flags so they are there even on
5104                          * invalid channels */
5105                         ch_info->flags = eeprom_ch_info[ch].flags;
5106
5107                         if (!(is_channel_valid(ch_info))) {
5108                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5109                                                "No traffic\n",
5110                                                ch_info->channel,
5111                                                ch_info->flags,
5112                                                is_channel_a_band(ch_info) ?
5113                                                "5.2" : "2.4");
5114                                 ch_info++;
5115                                 continue;
5116                         }
5117
5118                         /* Initialize regulatory-based run-time data */
5119                         ch_info->max_power_avg = ch_info->curr_txpow =
5120                             eeprom_ch_info[ch].max_power_avg;
5121                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5122                         ch_info->min_power = 0;
5123
5124                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5125                                        " %ddBm): Ad-Hoc %ssupported\n",
5126                                        ch_info->channel,
5127                                        is_channel_a_band(ch_info) ?
5128                                        "5.2" : "2.4",
5129                                        CHECK_AND_PRINT(IBSS),
5130                                        CHECK_AND_PRINT(ACTIVE),
5131                                        CHECK_AND_PRINT(RADAR),
5132                                        CHECK_AND_PRINT(WIDE),
5133                                        CHECK_AND_PRINT(NARROW),
5134                                        CHECK_AND_PRINT(DFS),
5135                                        eeprom_ch_info[ch].flags,
5136                                        eeprom_ch_info[ch].max_power_avg,
5137                                        ((eeprom_ch_info[ch].
5138                                          flags & EEPROM_CHANNEL_IBSS)
5139                                         && !(eeprom_ch_info[ch].
5140                                              flags & EEPROM_CHANNEL_RADAR))
5141                                        ? "" : "not ");
5142
5143                         /* Set the user_txpower_limit to the highest power
5144                          * supported by any channel */
5145                         if (eeprom_ch_info[ch].max_power_avg >
5146                             priv->user_txpower_limit)
5147                                 priv->user_txpower_limit =
5148                                     eeprom_ch_info[ch].max_power_avg;
5149
5150                         ch_info++;
5151                 }
5152         }
5153
5154         /* Set up txpower settings in driver for all channels */
5155         if (iwl3945_txpower_set_from_eeprom(priv))
5156                 return -EIO;
5157
5158         return 0;
5159 }
5160
5161 /*
5162  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
5163  */
5164 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
5165 {
5166         kfree(priv->channel_info);
5167         priv->channel_count = 0;
5168 }
5169
5170 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5171  * sending probe req.  This should be set long enough to hear probe responses
5172  * from more than one AP.  */
5173 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5174 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5175
5176 /* For faster active scanning, scan will move to the next channel if fewer than
5177  * PLCP_QUIET_THRESH packets are heard on this channel within
5178  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5179  * time if it's a quiet channel (nothing responded to our probe, and there's
5180  * no other traffic).
5181  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5182 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5183 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5184
5185 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5186  * Must be set longer than active dwell time.
5187  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5188 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5189 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5190 #define IWL_PASSIVE_DWELL_BASE      (100)
5191 #define IWL_CHANNEL_TUNE_TIME       5
5192
5193 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
5194                                                 enum ieee80211_band band)
5195 {
5196         if (band == IEEE80211_BAND_5GHZ)
5197                 return IWL_ACTIVE_DWELL_TIME_52;
5198         else
5199                 return IWL_ACTIVE_DWELL_TIME_24;
5200 }
5201
5202 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
5203                                           enum ieee80211_band band)
5204 {
5205         u16 active = iwl3945_get_active_dwell_time(priv, band);
5206         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
5207             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5208             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5209
5210         if (iwl3945_is_associated(priv)) {
5211                 /* If we're associated, we clamp the maximum passive
5212                  * dwell time to be 98% of the beacon interval (minus
5213                  * 2 * channel tune time) */
5214                 passive = priv->beacon_int;
5215                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5216                         passive = IWL_PASSIVE_DWELL_BASE;
5217                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5218         }
5219
5220         if (passive <= active)
5221                 passive = active + 1;
5222
5223         return passive;
5224 }
5225
5226 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
5227                                          enum ieee80211_band band,
5228                                      u8 is_active, u8 direct_mask,
5229                                      struct iwl3945_scan_channel *scan_ch)
5230 {
5231         const struct ieee80211_channel *channels = NULL;
5232         const struct ieee80211_supported_band *sband;
5233         const struct iwl3945_channel_info *ch_info;
5234         u16 passive_dwell = 0;
5235         u16 active_dwell = 0;
5236         int added, i;
5237
5238         sband = iwl3945_get_band(priv, band);
5239         if (!sband)
5240                 return 0;
5241
5242         channels = sband->channels;
5243
5244         active_dwell = iwl3945_get_active_dwell_time(priv, band);
5245         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
5246
5247         for (i = 0, added = 0; i < sband->n_channels; i++) {
5248                 if (channels[i].hw_value ==
5249                     le16_to_cpu(priv->active_rxon.channel)) {
5250                         if (iwl3945_is_associated(priv)) {
5251                                 IWL_DEBUG_SCAN
5252                                     ("Skipping current channel %d\n",
5253                                      le16_to_cpu(priv->active_rxon.channel));
5254                                 continue;
5255                         }
5256                 } else if (priv->only_active_channel)
5257                         continue;
5258
5259                 scan_ch->channel = channels[i].hw_value;
5260
5261                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
5262                 if (!is_channel_valid(ch_info)) {
5263                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5264                                        scan_ch->channel);
5265                         continue;
5266                 }
5267
5268                 if (!is_active || is_channel_passive(ch_info) ||
5269                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
5270                         scan_ch->type = 0;      /* passive */
5271                 else
5272                         scan_ch->type = 1;      /* active */
5273
5274                 if (scan_ch->type & 1)
5275                         scan_ch->type |= (direct_mask << 1);
5276
5277                 if (is_channel_narrow(ch_info))
5278                         scan_ch->type |= (1 << 7);
5279
5280                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5281                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5282
5283                 /* Set txpower levels to defaults */
5284                 scan_ch->tpc.dsp_atten = 110;
5285                 /* scan_pwr_info->tpc.dsp_atten; */
5286
5287                 /*scan_pwr_info->tpc.tx_gain; */
5288                 if (band == IEEE80211_BAND_5GHZ)
5289                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5290                 else {
5291                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5292                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5293                          * power level:
5294                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5295                          */
5296                 }
5297
5298                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5299                                scan_ch->channel,
5300                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5301                                (scan_ch->type & 1) ?
5302                                active_dwell : passive_dwell);
5303
5304                 scan_ch++;
5305                 added++;
5306         }
5307
5308         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5309         return added;
5310 }
5311
5312 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5313                               struct ieee80211_rate *rates)
5314 {
5315         int i;
5316
5317         for (i = 0; i < IWL_RATE_COUNT; i++) {
5318                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
5319                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5320                 rates[i].hw_value_short = i;
5321                 rates[i].flags = 0;
5322                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5323                         /*
5324                          * If CCK != 1M then set short preamble rate flag.
5325                          */
5326                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5327                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5328                 }
5329         }
5330 }
5331
5332 /**
5333  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5334  */
5335 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5336 {
5337         struct iwl3945_channel_info *ch;
5338         struct ieee80211_supported_band *band;
5339         struct ieee80211_channel *channels;
5340         struct ieee80211_channel *geo_ch;
5341         struct ieee80211_rate *rates;
5342         int i = 0;
5343
5344         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5345             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5346                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5347                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5348                 return 0;
5349         }
5350
5351         channels = kzalloc(sizeof(struct ieee80211_channel) *
5352                            priv->channel_count, GFP_KERNEL);
5353         if (!channels)
5354                 return -ENOMEM;
5355
5356         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5357                         GFP_KERNEL);
5358         if (!rates) {
5359                 kfree(channels);
5360                 return -ENOMEM;
5361         }
5362
5363         /* 5.2GHz channels start after the 2.4GHz channels */
5364         band = &priv->bands[IEEE80211_BAND_5GHZ];
5365         band->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5366         band->bitrates = &rates[4];
5367         band->n_bitrates = 8;   /* just OFDM */
5368
5369         band = &priv->bands[IEEE80211_BAND_2GHZ];
5370         band->channels = channels;
5371         band->bitrates = rates;
5372         band->n_bitrates = 12;  /* OFDM & CCK */
5373
5374         priv->ieee_channels = channels;
5375         priv->ieee_rates = rates;
5376
5377         iwl3945_init_hw_rates(priv, rates);
5378
5379         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5380                 ch = &priv->channel_info[i];
5381
5382                 if (!is_channel_valid(ch)) {
5383                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5384                                     "skipping.\n",
5385                                     ch->channel, is_channel_a_band(ch) ?
5386                                     "5.2" : "2.4");
5387                         continue;
5388                 }
5389
5390                 if (is_channel_a_band(ch))
5391                         geo_ch = &priv->bands[IEEE80211_BAND_5GHZ].channels[priv->bands[IEEE80211_BAND_5GHZ].n_channels++];
5392                 else
5393                         geo_ch = &priv->bands[IEEE80211_BAND_2GHZ].channels[priv->bands[IEEE80211_BAND_2GHZ].n_channels++];
5394
5395                 geo_ch->center_freq = ieee80211chan2mhz(ch->channel);
5396                 geo_ch->max_power = ch->max_power_avg;
5397                 geo_ch->max_antenna_gain = 0xff;
5398                 geo_ch->hw_value = ch->channel;
5399
5400                 if (is_channel_valid(ch)) {
5401                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5402                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5403
5404                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5405                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5406
5407                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5408                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5409
5410                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5411                                 priv->max_channel_txpower_limit =
5412                                     ch->max_power_avg;
5413                 } else
5414                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5415         }
5416
5417         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) && priv->is_abg) {
5418                 printk(KERN_INFO DRV_NAME
5419                        ": Incorrectly detected BG card as ABG.  Please send "
5420                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5421                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5422                 priv->is_abg = 0;
5423         }
5424
5425         printk(KERN_INFO DRV_NAME
5426                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5427                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5428                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5429
5430         priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ];
5431         priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ];
5432
5433         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5434
5435         return 0;
5436 }
5437
5438 /*
5439  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5440  */
5441 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5442 {
5443         kfree(priv->ieee_channels);
5444         kfree(priv->ieee_rates);
5445         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5446 }
5447
5448 /******************************************************************************
5449  *
5450  * uCode download functions
5451  *
5452  ******************************************************************************/
5453
5454 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5455 {
5456         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5457         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5458         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5459         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5460         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5461         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5462 }
5463
5464 /**
5465  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5466  *     looking at all data.
5467  */
5468 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5469 {
5470         u32 val;
5471         u32 save_len = len;
5472         int rc = 0;
5473         u32 errcnt;
5474
5475         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5476
5477         rc = iwl3945_grab_nic_access(priv);
5478         if (rc)
5479                 return rc;
5480
5481         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5482
5483         errcnt = 0;
5484         for (; len > 0; len -= sizeof(u32), image++) {
5485                 /* read data comes through single port, auto-incr addr */
5486                 /* NOTE: Use the debugless read so we don't flood kernel log
5487                  * if IWL_DL_IO is set */
5488                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5489                 if (val != le32_to_cpu(*image)) {
5490                         IWL_ERROR("uCode INST section is invalid at "
5491                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5492                                   save_len - len, val, le32_to_cpu(*image));
5493                         rc = -EIO;
5494                         errcnt++;
5495                         if (errcnt >= 20)
5496                                 break;
5497                 }
5498         }
5499
5500         iwl3945_release_nic_access(priv);
5501
5502         if (!errcnt)
5503                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5504
5505         return rc;
5506 }
5507
5508
5509 /**
5510  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5511  *   using sample data 100 bytes apart.  If these sample points are good,
5512  *   it's a pretty good bet that everything between them is good, too.
5513  */
5514 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5515 {
5516         u32 val;
5517         int rc = 0;
5518         u32 errcnt = 0;
5519         u32 i;
5520
5521         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5522
5523         rc = iwl3945_grab_nic_access(priv);
5524         if (rc)
5525                 return rc;
5526
5527         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5528                 /* read data comes through single port, auto-incr addr */
5529                 /* NOTE: Use the debugless read so we don't flood kernel log
5530                  * if IWL_DL_IO is set */
5531                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5532                         i + RTC_INST_LOWER_BOUND);
5533                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5534                 if (val != le32_to_cpu(*image)) {
5535 #if 0 /* Enable this if you want to see details */
5536                         IWL_ERROR("uCode INST section is invalid at "
5537                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5538                                   i, val, *image);
5539 #endif
5540                         rc = -EIO;
5541                         errcnt++;
5542                         if (errcnt >= 3)
5543                                 break;
5544                 }
5545         }
5546
5547         iwl3945_release_nic_access(priv);
5548
5549         return rc;
5550 }
5551
5552
5553 /**
5554  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5555  *    and verify its contents
5556  */
5557 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5558 {
5559         __le32 *image;
5560         u32 len;
5561         int rc = 0;
5562
5563         /* Try bootstrap */
5564         image = (__le32 *)priv->ucode_boot.v_addr;
5565         len = priv->ucode_boot.len;
5566         rc = iwl3945_verify_inst_sparse(priv, image, len);
5567         if (rc == 0) {
5568                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5569                 return 0;
5570         }
5571
5572         /* Try initialize */
5573         image = (__le32 *)priv->ucode_init.v_addr;
5574         len = priv->ucode_init.len;
5575         rc = iwl3945_verify_inst_sparse(priv, image, len);
5576         if (rc == 0) {
5577                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5578                 return 0;
5579         }
5580
5581         /* Try runtime/protocol */
5582         image = (__le32 *)priv->ucode_code.v_addr;
5583         len = priv->ucode_code.len;
5584         rc = iwl3945_verify_inst_sparse(priv, image, len);
5585         if (rc == 0) {
5586                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5587                 return 0;
5588         }
5589
5590         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5591
5592         /* Since nothing seems to match, show first several data entries in
5593          * instruction SRAM, so maybe visual inspection will give a clue.
5594          * Selection of bootstrap image (vs. other images) is arbitrary. */
5595         image = (__le32 *)priv->ucode_boot.v_addr;
5596         len = priv->ucode_boot.len;
5597         rc = iwl3945_verify_inst_full(priv, image, len);
5598
5599         return rc;
5600 }
5601
5602
5603 /* check contents of special bootstrap uCode SRAM */
5604 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5605 {
5606         __le32 *image = priv->ucode_boot.v_addr;
5607         u32 len = priv->ucode_boot.len;
5608         u32 reg;
5609         u32 val;
5610
5611         IWL_DEBUG_INFO("Begin verify bsm\n");
5612
5613         /* verify BSM SRAM contents */
5614         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5615         for (reg = BSM_SRAM_LOWER_BOUND;
5616              reg < BSM_SRAM_LOWER_BOUND + len;
5617              reg += sizeof(u32), image ++) {
5618                 val = iwl3945_read_prph(priv, reg);
5619                 if (val != le32_to_cpu(*image)) {
5620                         IWL_ERROR("BSM uCode verification failed at "
5621                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5622                                   BSM_SRAM_LOWER_BOUND,
5623                                   reg - BSM_SRAM_LOWER_BOUND, len,
5624                                   val, le32_to_cpu(*image));
5625                         return -EIO;
5626                 }
5627         }
5628
5629         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5630
5631         return 0;
5632 }
5633
5634 /**
5635  * iwl3945_load_bsm - Load bootstrap instructions
5636  *
5637  * BSM operation:
5638  *
5639  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5640  * in special SRAM that does not power down during RFKILL.  When powering back
5641  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5642  * the bootstrap program into the on-board processor, and starts it.
5643  *
5644  * The bootstrap program loads (via DMA) instructions and data for a new
5645  * program from host DRAM locations indicated by the host driver in the
5646  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5647  * automatically.
5648  *
5649  * When initializing the NIC, the host driver points the BSM to the
5650  * "initialize" uCode image.  This uCode sets up some internal data, then
5651  * notifies host via "initialize alive" that it is complete.
5652  *
5653  * The host then replaces the BSM_DRAM_* pointer values to point to the
5654  * normal runtime uCode instructions and a backup uCode data cache buffer
5655  * (filled initially with starting data values for the on-board processor),
5656  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5657  * which begins normal operation.
5658  *
5659  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5660  * the backup data cache in DRAM before SRAM is powered down.
5661  *
5662  * When powering back up, the BSM loads the bootstrap program.  This reloads
5663  * the runtime uCode instructions and the backup data cache into SRAM,
5664  * and re-launches the runtime uCode from where it left off.
5665  */
5666 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5667 {
5668         __le32 *image = priv->ucode_boot.v_addr;
5669         u32 len = priv->ucode_boot.len;
5670         dma_addr_t pinst;
5671         dma_addr_t pdata;
5672         u32 inst_len;
5673         u32 data_len;
5674         int rc;
5675         int i;
5676         u32 done;
5677         u32 reg_offset;
5678
5679         IWL_DEBUG_INFO("Begin load bsm\n");
5680
5681         /* make sure bootstrap program is no larger than BSM's SRAM size */
5682         if (len > IWL_MAX_BSM_SIZE)
5683                 return -EINVAL;
5684
5685         /* Tell bootstrap uCode where to find the "Initialize" uCode
5686          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5687          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5688          *        after the "initialize" uCode has run, to point to
5689          *        runtime/protocol instructions and backup data cache. */
5690         pinst = priv->ucode_init.p_addr;
5691         pdata = priv->ucode_init_data.p_addr;
5692         inst_len = priv->ucode_init.len;
5693         data_len = priv->ucode_init_data.len;
5694
5695         rc = iwl3945_grab_nic_access(priv);
5696         if (rc)
5697                 return rc;
5698
5699         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5700         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5701         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5702         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5703
5704         /* Fill BSM memory with bootstrap instructions */
5705         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5706              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5707              reg_offset += sizeof(u32), image++)
5708                 _iwl3945_write_prph(priv, reg_offset,
5709                                           le32_to_cpu(*image));
5710
5711         rc = iwl3945_verify_bsm(priv);
5712         if (rc) {
5713                 iwl3945_release_nic_access(priv);
5714                 return rc;
5715         }
5716
5717         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5718         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5719         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5720                                  RTC_INST_LOWER_BOUND);
5721         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5722
5723         /* Load bootstrap code into instruction SRAM now,
5724          *   to prepare to load "initialize" uCode */
5725         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5726                 BSM_WR_CTRL_REG_BIT_START);
5727
5728         /* Wait for load of bootstrap uCode to finish */
5729         for (i = 0; i < 100; i++) {
5730                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5731                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5732                         break;
5733                 udelay(10);
5734         }
5735         if (i < 100)
5736                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5737         else {
5738                 IWL_ERROR("BSM write did not complete!\n");
5739                 return -EIO;
5740         }
5741
5742         /* Enable future boot loads whenever power management unit triggers it
5743          *   (e.g. when powering back up after power-save shutdown) */
5744         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5745                 BSM_WR_CTRL_REG_BIT_START_EN);
5746
5747         iwl3945_release_nic_access(priv);
5748
5749         return 0;
5750 }
5751
5752 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5753 {
5754         /* Remove all resets to allow NIC to operate */
5755         iwl3945_write32(priv, CSR_RESET, 0);
5756 }
5757
5758 /**
5759  * iwl3945_read_ucode - Read uCode images from disk file.
5760  *
5761  * Copy into buffers for card to fetch via bus-mastering
5762  */
5763 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5764 {
5765         struct iwl3945_ucode *ucode;
5766         int ret = 0;
5767         const struct firmware *ucode_raw;
5768         /* firmware file name contains uCode/driver compatibility version */
5769         const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5770         u8 *src;
5771         size_t len;
5772         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5773
5774         /* Ask kernel firmware_class module to get the boot firmware off disk.
5775          * request_firmware() is synchronous, file is in memory on return. */
5776         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5777         if (ret < 0) {
5778                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5779                                 name, ret);
5780                 goto error;
5781         }
5782
5783         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5784                        name, ucode_raw->size);
5785
5786         /* Make sure that we got at least our header! */
5787         if (ucode_raw->size < sizeof(*ucode)) {
5788                 IWL_ERROR("File size way too small!\n");
5789                 ret = -EINVAL;
5790                 goto err_release;
5791         }
5792
5793         /* Data from ucode file:  header followed by uCode images */
5794         ucode = (void *)ucode_raw->data;
5795
5796         ver = le32_to_cpu(ucode->ver);
5797         inst_size = le32_to_cpu(ucode->inst_size);
5798         data_size = le32_to_cpu(ucode->data_size);
5799         init_size = le32_to_cpu(ucode->init_size);
5800         init_data_size = le32_to_cpu(ucode->init_data_size);
5801         boot_size = le32_to_cpu(ucode->boot_size);
5802
5803         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5804         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5805         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5806         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5807         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5808         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5809
5810         /* Verify size of file vs. image size info in file's header */
5811         if (ucode_raw->size < sizeof(*ucode) +
5812                 inst_size + data_size + init_size +
5813                 init_data_size + boot_size) {
5814
5815                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5816                                (int)ucode_raw->size);
5817                 ret = -EINVAL;
5818                 goto err_release;
5819         }
5820
5821         /* Verify that uCode images will fit in card's SRAM */
5822         if (inst_size > IWL_MAX_INST_SIZE) {
5823                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5824                                inst_size);
5825                 ret = -EINVAL;
5826                 goto err_release;
5827         }
5828
5829         if (data_size > IWL_MAX_DATA_SIZE) {
5830                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5831                                data_size);
5832                 ret = -EINVAL;
5833                 goto err_release;
5834         }
5835         if (init_size > IWL_MAX_INST_SIZE) {
5836                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5837                                 init_size);
5838                 ret = -EINVAL;
5839                 goto err_release;
5840         }
5841         if (init_data_size > IWL_MAX_DATA_SIZE) {
5842                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5843                                 init_data_size);
5844                 ret = -EINVAL;
5845                 goto err_release;
5846         }
5847         if (boot_size > IWL_MAX_BSM_SIZE) {
5848                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5849                                 boot_size);
5850                 ret = -EINVAL;
5851                 goto err_release;
5852         }
5853
5854         /* Allocate ucode buffers for card's bus-master loading ... */
5855
5856         /* Runtime instructions and 2 copies of data:
5857          * 1) unmodified from disk
5858          * 2) backup cache for save/restore during power-downs */
5859         priv->ucode_code.len = inst_size;
5860         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5861
5862         priv->ucode_data.len = data_size;
5863         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5864
5865         priv->ucode_data_backup.len = data_size;
5866         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5867
5868         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5869             !priv->ucode_data_backup.v_addr)
5870                 goto err_pci_alloc;
5871
5872         /* Initialization instructions and data */
5873         if (init_size && init_data_size) {
5874                 priv->ucode_init.len = init_size;
5875                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5876
5877                 priv->ucode_init_data.len = init_data_size;
5878                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5879
5880                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5881                         goto err_pci_alloc;
5882         }
5883
5884         /* Bootstrap (instructions only, no data) */
5885         if (boot_size) {
5886                 priv->ucode_boot.len = boot_size;
5887                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5888
5889                 if (!priv->ucode_boot.v_addr)
5890                         goto err_pci_alloc;
5891         }
5892
5893         /* Copy images into buffers for card's bus-master reads ... */
5894
5895         /* Runtime instructions (first block of data in file) */
5896         src = &ucode->data[0];
5897         len = priv->ucode_code.len;
5898         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5899         memcpy(priv->ucode_code.v_addr, src, len);
5900         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5901                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5902
5903         /* Runtime data (2nd block)
5904          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5905         src = &ucode->data[inst_size];
5906         len = priv->ucode_data.len;
5907         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5908         memcpy(priv->ucode_data.v_addr, src, len);
5909         memcpy(priv->ucode_data_backup.v_addr, src, len);
5910
5911         /* Initialization instructions (3rd block) */
5912         if (init_size) {
5913                 src = &ucode->data[inst_size + data_size];
5914                 len = priv->ucode_init.len;
5915                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5916                                len);
5917                 memcpy(priv->ucode_init.v_addr, src, len);
5918         }
5919
5920         /* Initialization data (4th block) */
5921         if (init_data_size) {
5922                 src = &ucode->data[inst_size + data_size + init_size];
5923                 len = priv->ucode_init_data.len;
5924                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5925                                (int)len);
5926                 memcpy(priv->ucode_init_data.v_addr, src, len);
5927         }
5928
5929         /* Bootstrap instructions (5th block) */
5930         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5931         len = priv->ucode_boot.len;
5932         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5933                        (int)len);
5934         memcpy(priv->ucode_boot.v_addr, src, len);
5935
5936         /* We have our copies now, allow OS release its copies */
5937         release_firmware(ucode_raw);
5938         return 0;
5939
5940  err_pci_alloc:
5941         IWL_ERROR("failed to allocate pci memory\n");
5942         ret = -ENOMEM;
5943         iwl3945_dealloc_ucode_pci(priv);
5944
5945  err_release:
5946         release_firmware(ucode_raw);
5947
5948  error:
5949         return ret;
5950 }
5951
5952
5953 /**
5954  * iwl3945_set_ucode_ptrs - Set uCode address location
5955  *
5956  * Tell initialization uCode where to find runtime uCode.
5957  *
5958  * BSM registers initially contain pointers to initialization uCode.
5959  * We need to replace them to load runtime uCode inst and data,
5960  * and to save runtime data when powering down.
5961  */
5962 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5963 {
5964         dma_addr_t pinst;
5965         dma_addr_t pdata;
5966         int rc = 0;
5967         unsigned long flags;
5968
5969         /* bits 31:0 for 3945 */
5970         pinst = priv->ucode_code.p_addr;
5971         pdata = priv->ucode_data_backup.p_addr;
5972
5973         spin_lock_irqsave(&priv->lock, flags);
5974         rc = iwl3945_grab_nic_access(priv);
5975         if (rc) {
5976                 spin_unlock_irqrestore(&priv->lock, flags);
5977                 return rc;
5978         }
5979
5980         /* Tell bootstrap uCode where to find image to load */
5981         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5982         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5983         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5984                                  priv->ucode_data.len);
5985
5986         /* Inst bytecount must be last to set up, bit 31 signals uCode
5987          *   that all new ptr/size info is in place */
5988         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5989                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5990
5991         iwl3945_release_nic_access(priv);
5992
5993         spin_unlock_irqrestore(&priv->lock, flags);
5994
5995         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5996
5997         return rc;
5998 }
5999
6000 /**
6001  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
6002  *
6003  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6004  *
6005  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6006  */
6007 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
6008 {
6009         /* Check alive response for "valid" sign from uCode */
6010         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6011                 /* We had an error bringing up the hardware, so take it
6012                  * all the way back down so we can try again */
6013                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6014                 goto restart;
6015         }
6016
6017         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6018          * This is a paranoid check, because we would not have gotten the
6019          * "initialize" alive if code weren't properly loaded.  */
6020         if (iwl3945_verify_ucode(priv)) {
6021                 /* Runtime instruction load was bad;
6022                  * take it all the way back down so we can try again */
6023                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6024                 goto restart;
6025         }
6026
6027         /* Send pointers to protocol/runtime uCode image ... init code will
6028          * load and launch runtime uCode, which will send us another "Alive"
6029          * notification. */
6030         IWL_DEBUG_INFO("Initialization Alive received.\n");
6031         if (iwl3945_set_ucode_ptrs(priv)) {
6032                 /* Runtime instruction load won't happen;
6033                  * take it all the way back down so we can try again */
6034                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6035                 goto restart;
6036         }
6037         return;
6038
6039  restart:
6040         queue_work(priv->workqueue, &priv->restart);
6041 }
6042
6043
6044 /**
6045  * iwl3945_alive_start - called after REPLY_ALIVE notification received
6046  *                   from protocol/runtime uCode (initialization uCode's
6047  *                   Alive gets handled by iwl3945_init_alive_start()).
6048  */
6049 static void iwl3945_alive_start(struct iwl3945_priv *priv)
6050 {
6051         int rc = 0;
6052         int thermal_spin = 0;
6053         u32 rfkill;
6054
6055         IWL_DEBUG_INFO("Runtime Alive received.\n");
6056
6057         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6058                 /* We had an error bringing up the hardware, so take it
6059                  * all the way back down so we can try again */
6060                 IWL_DEBUG_INFO("Alive failed.\n");
6061                 goto restart;
6062         }
6063
6064         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6065          * This is a paranoid check, because we would not have gotten the
6066          * "runtime" alive if code weren't properly loaded.  */
6067         if (iwl3945_verify_ucode(priv)) {
6068                 /* Runtime instruction load was bad;
6069                  * take it all the way back down so we can try again */
6070                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6071                 goto restart;
6072         }
6073
6074         iwl3945_clear_stations_table(priv);
6075
6076         rc = iwl3945_grab_nic_access(priv);
6077         if (rc) {
6078                 IWL_WARNING("Can not read rfkill status from adapter\n");
6079                 return;
6080         }
6081
6082         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
6083         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6084         iwl3945_release_nic_access(priv);
6085
6086         if (rfkill & 0x1) {
6087                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6088                 /* if rfkill is not on, then wait for thermal
6089                  * sensor in adapter to kick in */
6090                 while (iwl3945_hw_get_temperature(priv) == 0) {
6091                         thermal_spin++;
6092                         udelay(10);
6093                 }
6094
6095                 if (thermal_spin)
6096                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6097                                        thermal_spin * 10);
6098         } else
6099                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6100
6101         /* After the ALIVE response, we can send commands to 3945 uCode */
6102         set_bit(STATUS_ALIVE, &priv->status);
6103
6104         /* Clear out the uCode error bit if it is set */
6105         clear_bit(STATUS_FW_ERROR, &priv->status);
6106
6107         if (iwl3945_is_rfkill(priv))
6108                 return;
6109
6110         ieee80211_start_queues(priv->hw);
6111
6112         priv->active_rate = priv->rates_mask;
6113         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6114
6115         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6116
6117         if (iwl3945_is_associated(priv)) {
6118                 struct iwl3945_rxon_cmd *active_rxon =
6119                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
6120
6121                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6122                        sizeof(priv->staging_rxon));
6123                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6124         } else {
6125                 /* Initialize our rx_config data */
6126                 iwl3945_connection_init_rx_config(priv);
6127                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6128         }
6129
6130         /* Configure Bluetooth device coexistence support */
6131         iwl3945_send_bt_config(priv);
6132
6133         /* Configure the adapter for unassociated operation */
6134         iwl3945_commit_rxon(priv);
6135
6136         /* At this point, the NIC is initialized and operational */
6137         priv->notif_missed_beacons = 0;
6138         set_bit(STATUS_READY, &priv->status);
6139
6140         iwl3945_reg_txpower_periodic(priv);
6141
6142         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6143         wake_up_interruptible(&priv->wait_command_queue);
6144
6145         if (priv->error_recovering)
6146                 iwl3945_error_recovery(priv);
6147
6148         return;
6149
6150  restart:
6151         queue_work(priv->workqueue, &priv->restart);
6152 }
6153
6154 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
6155
6156 static void __iwl3945_down(struct iwl3945_priv *priv)
6157 {
6158         unsigned long flags;
6159         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6160         struct ieee80211_conf *conf = NULL;
6161
6162         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6163
6164         conf = ieee80211_get_hw_conf(priv->hw);
6165
6166         if (!exit_pending)
6167                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6168
6169         iwl3945_clear_stations_table(priv);
6170
6171         /* Unblock any waiting calls */
6172         wake_up_interruptible_all(&priv->wait_command_queue);
6173
6174         /* Wipe out the EXIT_PENDING status bit if we are not actually
6175          * exiting the module */
6176         if (!exit_pending)
6177                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6178
6179         /* stop and reset the on-board processor */
6180         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6181
6182         /* tell the device to stop sending interrupts */
6183         iwl3945_disable_interrupts(priv);
6184
6185         if (priv->mac80211_registered)
6186                 ieee80211_stop_queues(priv->hw);
6187
6188         /* If we have not previously called iwl3945_init() then
6189          * clear all bits but the RF Kill and SUSPEND bits and return */
6190         if (!iwl3945_is_init(priv)) {
6191                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6192                                         STATUS_RF_KILL_HW |
6193                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6194                                         STATUS_RF_KILL_SW |
6195                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6196                                         STATUS_GEO_CONFIGURED |
6197                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6198                                         STATUS_IN_SUSPEND;
6199                 goto exit;
6200         }
6201
6202         /* ...otherwise clear out all the status bits but the RF Kill and
6203          * SUSPEND bits and continue taking the NIC down. */
6204         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6205                                 STATUS_RF_KILL_HW |
6206                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6207                                 STATUS_RF_KILL_SW |
6208                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6209                                 STATUS_GEO_CONFIGURED |
6210                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6211                                 STATUS_IN_SUSPEND |
6212                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6213                                 STATUS_FW_ERROR;
6214
6215         spin_lock_irqsave(&priv->lock, flags);
6216         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6217         spin_unlock_irqrestore(&priv->lock, flags);
6218
6219         iwl3945_hw_txq_ctx_stop(priv);
6220         iwl3945_hw_rxq_stop(priv);
6221
6222         spin_lock_irqsave(&priv->lock, flags);
6223         if (!iwl3945_grab_nic_access(priv)) {
6224                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
6225                                          APMG_CLK_VAL_DMA_CLK_RQT);
6226                 iwl3945_release_nic_access(priv);
6227         }
6228         spin_unlock_irqrestore(&priv->lock, flags);
6229
6230         udelay(5);
6231
6232         iwl3945_hw_nic_stop_master(priv);
6233         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6234         iwl3945_hw_nic_reset(priv);
6235
6236  exit:
6237         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
6238
6239         if (priv->ibss_beacon)
6240                 dev_kfree_skb(priv->ibss_beacon);
6241         priv->ibss_beacon = NULL;
6242
6243         /* clear out any free frames */
6244         iwl3945_clear_free_frames(priv);
6245 }
6246
6247 static void iwl3945_down(struct iwl3945_priv *priv)
6248 {
6249         mutex_lock(&priv->mutex);
6250         __iwl3945_down(priv);
6251         mutex_unlock(&priv->mutex);
6252
6253         iwl3945_cancel_deferred_work(priv);
6254 }
6255
6256 #define MAX_HW_RESTARTS 5
6257
6258 static int __iwl3945_up(struct iwl3945_priv *priv)
6259 {
6260         int rc, i;
6261
6262         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6263                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6264                 return -EIO;
6265         }
6266
6267         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6268                 IWL_WARNING("Radio disabled by SW RF kill (module "
6269                             "parameter)\n");
6270                 return -ENODEV;
6271         }
6272
6273         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6274                 IWL_ERROR("ucode not available for device bringup\n");
6275                 return -EIO;
6276         }
6277
6278         /* If platform's RF_KILL switch is NOT set to KILL */
6279         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6280                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6281                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6282         else {
6283                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6284                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6285                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6286                         return -ENODEV;
6287                 }
6288         }
6289
6290         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6291
6292         rc = iwl3945_hw_nic_init(priv);
6293         if (rc) {
6294                 IWL_ERROR("Unable to int nic\n");
6295                 return rc;
6296         }
6297
6298         /* make sure rfkill handshake bits are cleared */
6299         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6300         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6301                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6302
6303         /* clear (again), then enable host interrupts */
6304         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6305         iwl3945_enable_interrupts(priv);
6306
6307         /* really make sure rfkill handshake bits are cleared */
6308         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6309         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6310
6311         /* Copy original ucode data image from disk into backup cache.
6312          * This will be used to initialize the on-board processor's
6313          * data SRAM for a clean start when the runtime program first loads. */
6314         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6315                priv->ucode_data.len);
6316
6317         /* We return success when we resume from suspend and rf_kill is on. */
6318         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6319                 return 0;
6320
6321         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6322
6323                 iwl3945_clear_stations_table(priv);
6324
6325                 /* load bootstrap state machine,
6326                  * load bootstrap program into processor's memory,
6327                  * prepare to load the "initialize" uCode */
6328                 rc = iwl3945_load_bsm(priv);
6329
6330                 if (rc) {
6331                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6332                         continue;
6333                 }
6334
6335                 /* start card; "initialize" will load runtime ucode */
6336                 iwl3945_nic_start(priv);
6337
6338                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6339
6340                 return 0;
6341         }
6342
6343         set_bit(STATUS_EXIT_PENDING, &priv->status);
6344         __iwl3945_down(priv);
6345
6346         /* tried to restart and config the device for as long as our
6347          * patience could withstand */
6348         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6349         return -EIO;
6350 }
6351
6352
6353 /*****************************************************************************
6354  *
6355  * Workqueue callbacks
6356  *
6357  *****************************************************************************/
6358
6359 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6360 {
6361         struct iwl3945_priv *priv =
6362             container_of(data, struct iwl3945_priv, init_alive_start.work);
6363
6364         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6365                 return;
6366
6367         mutex_lock(&priv->mutex);
6368         iwl3945_init_alive_start(priv);
6369         mutex_unlock(&priv->mutex);
6370 }
6371
6372 static void iwl3945_bg_alive_start(struct work_struct *data)
6373 {
6374         struct iwl3945_priv *priv =
6375             container_of(data, struct iwl3945_priv, alive_start.work);
6376
6377         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6378                 return;
6379
6380         mutex_lock(&priv->mutex);
6381         iwl3945_alive_start(priv);
6382         mutex_unlock(&priv->mutex);
6383 }
6384
6385 static void iwl3945_bg_rf_kill(struct work_struct *work)
6386 {
6387         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6388
6389         wake_up_interruptible(&priv->wait_command_queue);
6390
6391         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6392                 return;
6393
6394         mutex_lock(&priv->mutex);
6395
6396         if (!iwl3945_is_rfkill(priv)) {
6397                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6398                           "HW and/or SW RF Kill no longer active, restarting "
6399                           "device\n");
6400                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6401                         queue_work(priv->workqueue, &priv->restart);
6402         } else {
6403
6404                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6405                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6406                                           "disabled by SW switch\n");
6407                 else
6408                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6409                                     "Kill switch must be turned off for "
6410                                     "wireless networking to work.\n");
6411         }
6412         mutex_unlock(&priv->mutex);
6413 }
6414
6415 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6416
6417 static void iwl3945_bg_scan_check(struct work_struct *data)
6418 {
6419         struct iwl3945_priv *priv =
6420             container_of(data, struct iwl3945_priv, scan_check.work);
6421
6422         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6423                 return;
6424
6425         mutex_lock(&priv->mutex);
6426         if (test_bit(STATUS_SCANNING, &priv->status) ||
6427             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6428                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6429                           "Scan completion watchdog resetting adapter (%dms)\n",
6430                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6431
6432                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6433                         iwl3945_send_scan_abort(priv);
6434         }
6435         mutex_unlock(&priv->mutex);
6436 }
6437
6438 static void iwl3945_bg_request_scan(struct work_struct *data)
6439 {
6440         struct iwl3945_priv *priv =
6441             container_of(data, struct iwl3945_priv, request_scan);
6442         struct iwl3945_host_cmd cmd = {
6443                 .id = REPLY_SCAN_CMD,
6444                 .len = sizeof(struct iwl3945_scan_cmd),
6445                 .meta.flags = CMD_SIZE_HUGE,
6446         };
6447         int rc = 0;
6448         struct iwl3945_scan_cmd *scan;
6449         struct ieee80211_conf *conf = NULL;
6450         u8 direct_mask;
6451         enum ieee80211_band band;
6452
6453         conf = ieee80211_get_hw_conf(priv->hw);
6454
6455         mutex_lock(&priv->mutex);
6456
6457         if (!iwl3945_is_ready(priv)) {
6458                 IWL_WARNING("request scan called when driver not ready.\n");
6459                 goto done;
6460         }
6461
6462         /* Make sure the scan wasn't cancelled before this queued work
6463          * was given the chance to run... */
6464         if (!test_bit(STATUS_SCANNING, &priv->status))
6465                 goto done;
6466
6467         /* This should never be called or scheduled if there is currently
6468          * a scan active in the hardware. */
6469         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6470                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6471                                "Ignoring second request.\n");
6472                 rc = -EIO;
6473                 goto done;
6474         }
6475
6476         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6477                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6478                 goto done;
6479         }
6480
6481         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6482                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6483                 goto done;
6484         }
6485
6486         if (iwl3945_is_rfkill(priv)) {
6487                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6488                 goto done;
6489         }
6490
6491         if (!test_bit(STATUS_READY, &priv->status)) {
6492                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6493                 goto done;
6494         }
6495
6496         if (!priv->scan_bands) {
6497                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6498                 goto done;
6499         }
6500
6501         if (!priv->scan) {
6502                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6503                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6504                 if (!priv->scan) {
6505                         rc = -ENOMEM;
6506                         goto done;
6507                 }
6508         }
6509         scan = priv->scan;
6510         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6511
6512         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6513         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6514
6515         if (iwl3945_is_associated(priv)) {
6516                 u16 interval = 0;
6517                 u32 extra;
6518                 u32 suspend_time = 100;
6519                 u32 scan_suspend_time = 100;
6520                 unsigned long flags;
6521
6522                 IWL_DEBUG_INFO("Scanning while associated...\n");
6523
6524                 spin_lock_irqsave(&priv->lock, flags);
6525                 interval = priv->beacon_int;
6526                 spin_unlock_irqrestore(&priv->lock, flags);
6527
6528                 scan->suspend_time = 0;
6529                 scan->max_out_time = cpu_to_le32(200 * 1024);
6530                 if (!interval)
6531                         interval = suspend_time;
6532                 /*
6533                  * suspend time format:
6534                  *  0-19: beacon interval in usec (time before exec.)
6535                  * 20-23: 0
6536                  * 24-31: number of beacons (suspend between channels)
6537                  */
6538
6539                 extra = (suspend_time / interval) << 24;
6540                 scan_suspend_time = 0xFF0FFFFF &
6541                     (extra | ((suspend_time % interval) * 1024));
6542
6543                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6544                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6545                                scan_suspend_time, interval);
6546         }
6547
6548         /* We should add the ability for user to lock to PASSIVE ONLY */
6549         if (priv->one_direct_scan) {
6550                 IWL_DEBUG_SCAN
6551                     ("Kicking off one direct scan for '%s'\n",
6552                      iwl3945_escape_essid(priv->direct_ssid,
6553                                       priv->direct_ssid_len));
6554                 scan->direct_scan[0].id = WLAN_EID_SSID;
6555                 scan->direct_scan[0].len = priv->direct_ssid_len;
6556                 memcpy(scan->direct_scan[0].ssid,
6557                        priv->direct_ssid, priv->direct_ssid_len);
6558                 direct_mask = 1;
6559         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6560                 scan->direct_scan[0].id = WLAN_EID_SSID;
6561                 scan->direct_scan[0].len = priv->essid_len;
6562                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6563                 direct_mask = 1;
6564         } else
6565                 direct_mask = 0;
6566
6567         /* We don't build a direct scan probe request; the uCode will do
6568          * that based on the direct_mask added to each channel entry */
6569         scan->tx_cmd.len = cpu_to_le16(
6570                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6571                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6572         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6573         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6574         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6575
6576         /* flags + rate selection */
6577
6578         switch (priv->scan_bands) {
6579         case 2:
6580                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6581                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6582                 scan->good_CRC_th = 0;
6583                 band = IEEE80211_BAND_2GHZ;
6584                 break;
6585
6586         case 1:
6587                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6588                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6589                 band = IEEE80211_BAND_5GHZ;
6590                 break;
6591
6592         default:
6593                 IWL_WARNING("Invalid scan band count\n");
6594                 goto done;
6595         }
6596
6597         /* select Rx antennas */
6598         scan->flags |= iwl3945_get_antenna_flags(priv);
6599
6600         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6601                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6602
6603         if (direct_mask)
6604                 IWL_DEBUG_SCAN
6605                     ("Initiating direct scan for %s.\n",
6606                      iwl3945_escape_essid(priv->essid, priv->essid_len));
6607         else
6608                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6609
6610         scan->channel_count =
6611                 iwl3945_get_channels_for_scan(
6612                         priv, band, 1, /* active */
6613                         direct_mask,
6614                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6615
6616         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6617             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6618         cmd.data = scan;
6619         scan->len = cpu_to_le16(cmd.len);
6620
6621         set_bit(STATUS_SCAN_HW, &priv->status);
6622         rc = iwl3945_send_cmd_sync(priv, &cmd);
6623         if (rc)
6624                 goto done;
6625
6626         queue_delayed_work(priv->workqueue, &priv->scan_check,
6627                            IWL_SCAN_CHECK_WATCHDOG);
6628
6629         mutex_unlock(&priv->mutex);
6630         return;
6631
6632  done:
6633         /* inform mac80211 scan aborted */
6634         queue_work(priv->workqueue, &priv->scan_completed);
6635         mutex_unlock(&priv->mutex);
6636 }
6637
6638 static void iwl3945_bg_up(struct work_struct *data)
6639 {
6640         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6641
6642         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6643                 return;
6644
6645         mutex_lock(&priv->mutex);
6646         __iwl3945_up(priv);
6647         mutex_unlock(&priv->mutex);
6648 }
6649
6650 static void iwl3945_bg_restart(struct work_struct *data)
6651 {
6652         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6653
6654         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6655                 return;
6656
6657         iwl3945_down(priv);
6658         queue_work(priv->workqueue, &priv->up);
6659 }
6660
6661 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6662 {
6663         struct iwl3945_priv *priv =
6664             container_of(data, struct iwl3945_priv, rx_replenish);
6665
6666         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6667                 return;
6668
6669         mutex_lock(&priv->mutex);
6670         iwl3945_rx_replenish(priv);
6671         mutex_unlock(&priv->mutex);
6672 }
6673
6674 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6675
6676 static void iwl3945_bg_post_associate(struct work_struct *data)
6677 {
6678         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6679                                              post_associate.work);
6680
6681         int rc = 0;
6682         struct ieee80211_conf *conf = NULL;
6683         DECLARE_MAC_BUF(mac);
6684
6685         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6686                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6687                 return;
6688         }
6689
6690
6691         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6692                         priv->assoc_id,
6693                         print_mac(mac, priv->active_rxon.bssid_addr));
6694
6695         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6696                 return;
6697
6698         mutex_lock(&priv->mutex);
6699
6700         if (!priv->vif || !priv->is_open) {
6701                 mutex_unlock(&priv->mutex);
6702                 return;
6703         }
6704         iwl3945_scan_cancel_timeout(priv, 200);
6705
6706         conf = ieee80211_get_hw_conf(priv->hw);
6707
6708         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6709         iwl3945_commit_rxon(priv);
6710
6711         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6712         iwl3945_setup_rxon_timing(priv);
6713         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6714                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6715         if (rc)
6716                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6717                             "Attempting to continue.\n");
6718
6719         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6720
6721         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6722
6723         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6724                         priv->assoc_id, priv->beacon_int);
6725
6726         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6727                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6728         else
6729                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6730
6731         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6732                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6733                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6734                 else
6735                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6736
6737                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6738                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6739
6740         }
6741
6742         iwl3945_commit_rxon(priv);
6743
6744         switch (priv->iw_mode) {
6745         case IEEE80211_IF_TYPE_STA:
6746                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6747                 break;
6748
6749         case IEEE80211_IF_TYPE_IBSS:
6750
6751                 /* clear out the station table */
6752                 iwl3945_clear_stations_table(priv);
6753
6754                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6755                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6756                 iwl3945_sync_sta(priv, IWL_STA_ID,
6757                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6758                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6759                                  CMD_ASYNC);
6760                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6761                 iwl3945_send_beacon_cmd(priv);
6762
6763                 break;
6764
6765         default:
6766                  IWL_ERROR("%s Should not be called in %d mode\n",
6767                            __FUNCTION__, priv->iw_mode);
6768                 break;
6769         }
6770
6771         iwl3945_sequence_reset(priv);
6772
6773 #ifdef CONFIG_IWL3945_QOS
6774         iwl3945_activate_qos(priv, 0);
6775 #endif /* CONFIG_IWL3945_QOS */
6776         /* we have just associated, don't start scan too early */
6777         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6778         mutex_unlock(&priv->mutex);
6779 }
6780
6781 static void iwl3945_bg_abort_scan(struct work_struct *work)
6782 {
6783         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6784
6785         if (!iwl3945_is_ready(priv))
6786                 return;
6787
6788         mutex_lock(&priv->mutex);
6789
6790         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6791         iwl3945_send_scan_abort(priv);
6792
6793         mutex_unlock(&priv->mutex);
6794 }
6795
6796 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6797
6798 static void iwl3945_bg_scan_completed(struct work_struct *work)
6799 {
6800         struct iwl3945_priv *priv =
6801             container_of(work, struct iwl3945_priv, scan_completed);
6802
6803         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6804
6805         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6806                 return;
6807
6808         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6809                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6810
6811         ieee80211_scan_completed(priv->hw);
6812
6813         /* Since setting the TXPOWER may have been deferred while
6814          * performing the scan, fire one off */
6815         mutex_lock(&priv->mutex);
6816         iwl3945_hw_reg_send_txpower(priv);
6817         mutex_unlock(&priv->mutex);
6818 }
6819
6820 /*****************************************************************************
6821  *
6822  * mac80211 entry point functions
6823  *
6824  *****************************************************************************/
6825
6826 #define UCODE_READY_TIMEOUT     (2 * HZ)
6827
6828 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6829 {
6830         struct iwl3945_priv *priv = hw->priv;
6831         int ret;
6832
6833         IWL_DEBUG_MAC80211("enter\n");
6834
6835         if (pci_enable_device(priv->pci_dev)) {
6836                 IWL_ERROR("Fail to pci_enable_device\n");
6837                 return -ENODEV;
6838         }
6839         pci_restore_state(priv->pci_dev);
6840         pci_enable_msi(priv->pci_dev);
6841
6842         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6843                           DRV_NAME, priv);
6844         if (ret) {
6845                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6846                 goto out_disable_msi;
6847         }
6848
6849         /* we should be verifying the device is ready to be opened */
6850         mutex_lock(&priv->mutex);
6851
6852         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6853         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6854          * ucode filename and max sizes are card-specific. */
6855
6856         if (!priv->ucode_code.len) {
6857                 ret = iwl3945_read_ucode(priv);
6858                 if (ret) {
6859                         IWL_ERROR("Could not read microcode: %d\n", ret);
6860                         mutex_unlock(&priv->mutex);
6861                         goto out_release_irq;
6862                 }
6863         }
6864
6865         ret = __iwl3945_up(priv);
6866
6867         mutex_unlock(&priv->mutex);
6868
6869         if (ret)
6870                 goto out_release_irq;
6871
6872         IWL_DEBUG_INFO("Start UP work.\n");
6873
6874         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6875                 return 0;
6876
6877         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6878          * mac80211 will not be run successfully. */
6879         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6880                         test_bit(STATUS_READY, &priv->status),
6881                         UCODE_READY_TIMEOUT);
6882         if (!ret) {
6883                 if (!test_bit(STATUS_READY, &priv->status)) {
6884                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6885                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6886                         ret = -ETIMEDOUT;
6887                         goto out_release_irq;
6888                 }
6889         }
6890
6891         priv->is_open = 1;
6892         IWL_DEBUG_MAC80211("leave\n");
6893         return 0;
6894
6895 out_release_irq:
6896         free_irq(priv->pci_dev->irq, priv);
6897 out_disable_msi:
6898         pci_disable_msi(priv->pci_dev);
6899         pci_disable_device(priv->pci_dev);
6900         priv->is_open = 0;
6901         IWL_DEBUG_MAC80211("leave - failed\n");
6902         return ret;
6903 }
6904
6905 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6906 {
6907         struct iwl3945_priv *priv = hw->priv;
6908
6909         IWL_DEBUG_MAC80211("enter\n");
6910
6911         if (!priv->is_open) {
6912                 IWL_DEBUG_MAC80211("leave - skip\n");
6913                 return;
6914         }
6915
6916         priv->is_open = 0;
6917
6918         if (iwl3945_is_ready_rf(priv)) {
6919                 /* stop mac, cancel any scan request and clear
6920                  * RXON_FILTER_ASSOC_MSK BIT
6921                  */
6922                 mutex_lock(&priv->mutex);
6923                 iwl3945_scan_cancel_timeout(priv, 100);
6924                 cancel_delayed_work(&priv->post_associate);
6925                 mutex_unlock(&priv->mutex);
6926         }
6927
6928         iwl3945_down(priv);
6929
6930         flush_workqueue(priv->workqueue);
6931         free_irq(priv->pci_dev->irq, priv);
6932         pci_disable_msi(priv->pci_dev);
6933         pci_save_state(priv->pci_dev);
6934         pci_disable_device(priv->pci_dev);
6935
6936         IWL_DEBUG_MAC80211("leave\n");
6937 }
6938
6939 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6940                       struct ieee80211_tx_control *ctl)
6941 {
6942         struct iwl3945_priv *priv = hw->priv;
6943
6944         IWL_DEBUG_MAC80211("enter\n");
6945
6946         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6947                 IWL_DEBUG_MAC80211("leave - monitor\n");
6948                 return -1;
6949         }
6950
6951         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6952                      ctl->tx_rate->bitrate);
6953
6954         if (iwl3945_tx_skb(priv, skb, ctl))
6955                 dev_kfree_skb_any(skb);
6956
6957         IWL_DEBUG_MAC80211("leave\n");
6958         return 0;
6959 }
6960
6961 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6962                                  struct ieee80211_if_init_conf *conf)
6963 {
6964         struct iwl3945_priv *priv = hw->priv;
6965         unsigned long flags;
6966         DECLARE_MAC_BUF(mac);
6967
6968         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6969
6970         if (priv->vif) {
6971                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6972                 return -EOPNOTSUPP;
6973         }
6974
6975         spin_lock_irqsave(&priv->lock, flags);
6976         priv->vif = conf->vif;
6977
6978         spin_unlock_irqrestore(&priv->lock, flags);
6979
6980         mutex_lock(&priv->mutex);
6981
6982         if (conf->mac_addr) {
6983                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
6984                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6985         }
6986
6987         if (iwl3945_is_ready(priv))
6988                 iwl3945_set_mode(priv, conf->type);
6989
6990         mutex_unlock(&priv->mutex);
6991
6992         IWL_DEBUG_MAC80211("leave\n");
6993         return 0;
6994 }
6995
6996 /**
6997  * iwl3945_mac_config - mac80211 config callback
6998  *
6999  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7000  * be set inappropriately and the driver currently sets the hardware up to
7001  * use it whenever needed.
7002  */
7003 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7004 {
7005         struct iwl3945_priv *priv = hw->priv;
7006         const struct iwl3945_channel_info *ch_info;
7007         unsigned long flags;
7008         int ret = 0;
7009
7010         mutex_lock(&priv->mutex);
7011         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
7012
7013         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7014
7015         if (!iwl3945_is_ready(priv)) {
7016                 IWL_DEBUG_MAC80211("leave - not ready\n");
7017                 ret = -EIO;
7018                 goto out;
7019         }
7020
7021         if (unlikely(!iwl3945_param_disable_hw_scan &&
7022                      test_bit(STATUS_SCANNING, &priv->status))) {
7023                 IWL_DEBUG_MAC80211("leave - scanning\n");
7024                 set_bit(STATUS_CONF_PENDING, &priv->status);
7025                 mutex_unlock(&priv->mutex);
7026                 return 0;
7027         }
7028
7029         spin_lock_irqsave(&priv->lock, flags);
7030
7031         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
7032                                            conf->channel->hw_value);
7033         if (!is_channel_valid(ch_info)) {
7034                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7035                                conf->channel->hw_value, conf->channel->band);
7036                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7037                 spin_unlock_irqrestore(&priv->lock, flags);
7038                 ret = -EINVAL;
7039                 goto out;
7040         }
7041
7042         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
7043
7044         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
7045
7046         /* The list of supported rates and rate mask can be different
7047          * for each phymode; since the phymode may have changed, reset
7048          * the rate mask to what mac80211 lists */
7049         iwl3945_set_rate(priv);
7050
7051         spin_unlock_irqrestore(&priv->lock, flags);
7052
7053 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7054         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7055                 iwl3945_hw_channel_switch(priv, conf->channel);
7056                 goto out;
7057         }
7058 #endif
7059
7060         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
7061
7062         if (!conf->radio_enabled) {
7063                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7064                 goto out;
7065         }
7066
7067         if (iwl3945_is_rfkill(priv)) {
7068                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7069                 ret = -EIO;
7070                 goto out;
7071         }
7072
7073         iwl3945_set_rate(priv);
7074
7075         if (memcmp(&priv->active_rxon,
7076                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7077                 iwl3945_commit_rxon(priv);
7078         else
7079                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7080
7081         IWL_DEBUG_MAC80211("leave\n");
7082
7083 out:
7084         clear_bit(STATUS_CONF_PENDING, &priv->status);
7085         mutex_unlock(&priv->mutex);
7086         return ret;
7087 }
7088
7089 static void iwl3945_config_ap(struct iwl3945_priv *priv)
7090 {
7091         int rc = 0;
7092
7093         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7094                 return;
7095
7096         /* The following should be done only at AP bring up */
7097         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7098
7099                 /* RXON - unassoc (to set timing command) */
7100                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7101                 iwl3945_commit_rxon(priv);
7102
7103                 /* RXON Timing */
7104                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
7105                 iwl3945_setup_rxon_timing(priv);
7106                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7107                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7108                 if (rc)
7109                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7110                                         "Attempting to continue.\n");
7111
7112                 /* FIXME: what should be the assoc_id for AP? */
7113                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7114                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7115                         priv->staging_rxon.flags |=
7116                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7117                 else
7118                         priv->staging_rxon.flags &=
7119                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7120
7121                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7122                         if (priv->assoc_capability &
7123                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7124                                 priv->staging_rxon.flags |=
7125                                         RXON_FLG_SHORT_SLOT_MSK;
7126                         else
7127                                 priv->staging_rxon.flags &=
7128                                         ~RXON_FLG_SHORT_SLOT_MSK;
7129
7130                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7131                                 priv->staging_rxon.flags &=
7132                                         ~RXON_FLG_SHORT_SLOT_MSK;
7133                 }
7134                 /* restore RXON assoc */
7135                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7136                 iwl3945_commit_rxon(priv);
7137                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
7138         }
7139         iwl3945_send_beacon_cmd(priv);
7140
7141         /* FIXME - we need to add code here to detect a totally new
7142          * configuration, reset the AP, unassoc, rxon timing, assoc,
7143          * clear sta table, add BCAST sta... */
7144 }
7145
7146 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
7147                                         struct ieee80211_vif *vif,
7148                                     struct ieee80211_if_conf *conf)
7149 {
7150         struct iwl3945_priv *priv = hw->priv;
7151         DECLARE_MAC_BUF(mac);
7152         unsigned long flags;
7153         int rc;
7154
7155         if (conf == NULL)
7156                 return -EIO;
7157
7158         /* XXX: this MUST use conf->mac_addr */
7159
7160         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7161             (!conf->beacon || !conf->ssid_len)) {
7162                 IWL_DEBUG_MAC80211
7163                     ("Leaving in AP mode because HostAPD is not ready.\n");
7164                 return 0;
7165         }
7166
7167         if (!iwl3945_is_alive(priv))
7168                 return -EAGAIN;
7169
7170         mutex_lock(&priv->mutex);
7171
7172         if (conf->bssid)
7173                 IWL_DEBUG_MAC80211("bssid: %s\n",
7174                                    print_mac(mac, conf->bssid));
7175
7176 /*
7177  * very dubious code was here; the probe filtering flag is never set:
7178  *
7179         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7180             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7181  */
7182         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7183                 IWL_DEBUG_MAC80211("leave - scanning\n");
7184                 mutex_unlock(&priv->mutex);
7185                 return 0;
7186         }
7187
7188         if (priv->vif != vif) {
7189                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7190                 mutex_unlock(&priv->mutex);
7191                 return 0;
7192         }
7193
7194         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7195                 if (!conf->bssid) {
7196                         conf->bssid = priv->mac_addr;
7197                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7198                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7199                                            print_mac(mac, conf->bssid));
7200                 }
7201                 if (priv->ibss_beacon)
7202                         dev_kfree_skb(priv->ibss_beacon);
7203
7204                 priv->ibss_beacon = conf->beacon;
7205         }
7206
7207         if (iwl3945_is_rfkill(priv))
7208                 goto done;
7209
7210         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7211             !is_multicast_ether_addr(conf->bssid)) {
7212                 /* If there is currently a HW scan going on in the background
7213                  * then we need to cancel it else the RXON below will fail. */
7214                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
7215                         IWL_WARNING("Aborted scan still in progress "
7216                                     "after 100ms\n");
7217                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7218                         mutex_unlock(&priv->mutex);
7219                         return -EAGAIN;
7220                 }
7221                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7222
7223                 /* TODO: Audit driver for usage of these members and see
7224                  * if mac80211 deprecates them (priv->bssid looks like it
7225                  * shouldn't be there, but I haven't scanned the IBSS code
7226                  * to verify) - jpk */
7227                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7228
7229                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7230                         iwl3945_config_ap(priv);
7231                 else {
7232                         rc = iwl3945_commit_rxon(priv);
7233                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7234                                 iwl3945_add_station(priv,
7235                                         priv->active_rxon.bssid_addr, 1, 0);
7236                 }
7237
7238         } else {
7239                 iwl3945_scan_cancel_timeout(priv, 100);
7240                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7241                 iwl3945_commit_rxon(priv);
7242         }
7243
7244  done:
7245         spin_lock_irqsave(&priv->lock, flags);
7246         if (!conf->ssid_len)
7247                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7248         else
7249                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7250
7251         priv->essid_len = conf->ssid_len;
7252         spin_unlock_irqrestore(&priv->lock, flags);
7253
7254         IWL_DEBUG_MAC80211("leave\n");
7255         mutex_unlock(&priv->mutex);
7256
7257         return 0;
7258 }
7259
7260 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
7261                                  unsigned int changed_flags,
7262                                  unsigned int *total_flags,
7263                                  int mc_count, struct dev_addr_list *mc_list)
7264 {
7265         /*
7266          * XXX: dummy
7267          * see also iwl3945_connection_init_rx_config
7268          */
7269         *total_flags = 0;
7270 }
7271
7272 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7273                                      struct ieee80211_if_init_conf *conf)
7274 {
7275         struct iwl3945_priv *priv = hw->priv;
7276
7277         IWL_DEBUG_MAC80211("enter\n");
7278
7279         mutex_lock(&priv->mutex);
7280
7281         if (iwl3945_is_ready_rf(priv)) {
7282                 iwl3945_scan_cancel_timeout(priv, 100);
7283                 cancel_delayed_work(&priv->post_associate);
7284                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7285                 iwl3945_commit_rxon(priv);
7286         }
7287         if (priv->vif == conf->vif) {
7288                 priv->vif = NULL;
7289                 memset(priv->bssid, 0, ETH_ALEN);
7290                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7291                 priv->essid_len = 0;
7292         }
7293         mutex_unlock(&priv->mutex);
7294
7295         IWL_DEBUG_MAC80211("leave\n");
7296 }
7297
7298 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7299 {
7300         int rc = 0;
7301         unsigned long flags;
7302         struct iwl3945_priv *priv = hw->priv;
7303
7304         IWL_DEBUG_MAC80211("enter\n");
7305
7306         mutex_lock(&priv->mutex);
7307         spin_lock_irqsave(&priv->lock, flags);
7308
7309         if (!iwl3945_is_ready_rf(priv)) {
7310                 rc = -EIO;
7311                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7312                 goto out_unlock;
7313         }
7314
7315         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7316                 rc = -EIO;
7317                 IWL_ERROR("ERROR: APs don't scan\n");
7318                 goto out_unlock;
7319         }
7320
7321         /* we don't schedule scan within next_scan_jiffies period */
7322         if (priv->next_scan_jiffies &&
7323                         time_after(priv->next_scan_jiffies, jiffies)) {
7324                 rc = -EAGAIN;
7325                 goto out_unlock;
7326         }
7327         /* if we just finished scan ask for delay */
7328         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7329                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7330                 rc = -EAGAIN;
7331                 goto out_unlock;
7332         }
7333         if (len) {
7334                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7335                                iwl3945_escape_essid(ssid, len), (int)len);
7336
7337                 priv->one_direct_scan = 1;
7338                 priv->direct_ssid_len = (u8)
7339                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7340                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7341         } else
7342                 priv->one_direct_scan = 0;
7343
7344         rc = iwl3945_scan_initiate(priv);
7345
7346         IWL_DEBUG_MAC80211("leave\n");
7347
7348 out_unlock:
7349         spin_unlock_irqrestore(&priv->lock, flags);
7350         mutex_unlock(&priv->mutex);
7351
7352         return rc;
7353 }
7354
7355 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7356                            const u8 *local_addr, const u8 *addr,
7357                            struct ieee80211_key_conf *key)
7358 {
7359         struct iwl3945_priv *priv = hw->priv;
7360         int rc = 0;
7361         u8 sta_id;
7362
7363         IWL_DEBUG_MAC80211("enter\n");
7364
7365         if (!iwl3945_param_hwcrypto) {
7366                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7367                 return -EOPNOTSUPP;
7368         }
7369
7370         if (is_zero_ether_addr(addr))
7371                 /* only support pairwise keys */
7372                 return -EOPNOTSUPP;
7373
7374         sta_id = iwl3945_hw_find_station(priv, addr);
7375         if (sta_id == IWL_INVALID_STATION) {
7376                 DECLARE_MAC_BUF(mac);
7377
7378                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7379                                    print_mac(mac, addr));
7380                 return -EINVAL;
7381         }
7382
7383         mutex_lock(&priv->mutex);
7384
7385         iwl3945_scan_cancel_timeout(priv, 100);
7386
7387         switch (cmd) {
7388         case  SET_KEY:
7389                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7390                 if (!rc) {
7391                         iwl3945_set_rxon_hwcrypto(priv, 1);
7392                         iwl3945_commit_rxon(priv);
7393                         key->hw_key_idx = sta_id;
7394                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7395                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7396                 }
7397                 break;
7398         case DISABLE_KEY:
7399                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7400                 if (!rc) {
7401                         iwl3945_set_rxon_hwcrypto(priv, 0);
7402                         iwl3945_commit_rxon(priv);
7403                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7404                 }
7405                 break;
7406         default:
7407                 rc = -EINVAL;
7408         }
7409
7410         IWL_DEBUG_MAC80211("leave\n");
7411         mutex_unlock(&priv->mutex);
7412
7413         return rc;
7414 }
7415
7416 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7417                            const struct ieee80211_tx_queue_params *params)
7418 {
7419         struct iwl3945_priv *priv = hw->priv;
7420 #ifdef CONFIG_IWL3945_QOS
7421         unsigned long flags;
7422         int q;
7423 #endif /* CONFIG_IWL3945_QOS */
7424
7425         IWL_DEBUG_MAC80211("enter\n");
7426
7427         if (!iwl3945_is_ready_rf(priv)) {
7428                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7429                 return -EIO;
7430         }
7431
7432         if (queue >= AC_NUM) {
7433                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7434                 return 0;
7435         }
7436
7437 #ifdef CONFIG_IWL3945_QOS
7438         if (!priv->qos_data.qos_enable) {
7439                 priv->qos_data.qos_active = 0;
7440                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7441                 return 0;
7442         }
7443         q = AC_NUM - 1 - queue;
7444
7445         spin_lock_irqsave(&priv->lock, flags);
7446
7447         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7448         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7449         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7450         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7451                         cpu_to_le16((params->burst_time * 100));
7452
7453         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7454         priv->qos_data.qos_active = 1;
7455
7456         spin_unlock_irqrestore(&priv->lock, flags);
7457
7458         mutex_lock(&priv->mutex);
7459         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7460                 iwl3945_activate_qos(priv, 1);
7461         else if (priv->assoc_id && iwl3945_is_associated(priv))
7462                 iwl3945_activate_qos(priv, 0);
7463
7464         mutex_unlock(&priv->mutex);
7465
7466 #endif /*CONFIG_IWL3945_QOS */
7467
7468         IWL_DEBUG_MAC80211("leave\n");
7469         return 0;
7470 }
7471
7472 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7473                                 struct ieee80211_tx_queue_stats *stats)
7474 {
7475         struct iwl3945_priv *priv = hw->priv;
7476         int i, avail;
7477         struct iwl3945_tx_queue *txq;
7478         struct iwl3945_queue *q;
7479         unsigned long flags;
7480
7481         IWL_DEBUG_MAC80211("enter\n");
7482
7483         if (!iwl3945_is_ready_rf(priv)) {
7484                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7485                 return -EIO;
7486         }
7487
7488         spin_lock_irqsave(&priv->lock, flags);
7489
7490         for (i = 0; i < AC_NUM; i++) {
7491                 txq = &priv->txq[i];
7492                 q = &txq->q;
7493                 avail = iwl3945_queue_space(q);
7494
7495                 stats->data[i].len = q->n_window - avail;
7496                 stats->data[i].limit = q->n_window - q->high_mark;
7497                 stats->data[i].count = q->n_window;
7498
7499         }
7500         spin_unlock_irqrestore(&priv->lock, flags);
7501
7502         IWL_DEBUG_MAC80211("leave\n");
7503
7504         return 0;
7505 }
7506
7507 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7508                              struct ieee80211_low_level_stats *stats)
7509 {
7510         IWL_DEBUG_MAC80211("enter\n");
7511         IWL_DEBUG_MAC80211("leave\n");
7512
7513         return 0;
7514 }
7515
7516 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7517 {
7518         IWL_DEBUG_MAC80211("enter\n");
7519         IWL_DEBUG_MAC80211("leave\n");
7520
7521         return 0;
7522 }
7523
7524 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7525 {
7526         struct iwl3945_priv *priv = hw->priv;
7527         unsigned long flags;
7528
7529         mutex_lock(&priv->mutex);
7530         IWL_DEBUG_MAC80211("enter\n");
7531
7532 #ifdef CONFIG_IWL3945_QOS
7533         iwl3945_reset_qos(priv);
7534 #endif
7535         cancel_delayed_work(&priv->post_associate);
7536
7537         spin_lock_irqsave(&priv->lock, flags);
7538         priv->assoc_id = 0;
7539         priv->assoc_capability = 0;
7540         priv->call_post_assoc_from_beacon = 0;
7541
7542         /* new association get rid of ibss beacon skb */
7543         if (priv->ibss_beacon)
7544                 dev_kfree_skb(priv->ibss_beacon);
7545
7546         priv->ibss_beacon = NULL;
7547
7548         priv->beacon_int = priv->hw->conf.beacon_int;
7549         priv->timestamp1 = 0;
7550         priv->timestamp0 = 0;
7551         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7552                 priv->beacon_int = 0;
7553
7554         spin_unlock_irqrestore(&priv->lock, flags);
7555
7556         if (!iwl3945_is_ready_rf(priv)) {
7557                 IWL_DEBUG_MAC80211("leave - not ready\n");
7558                 mutex_unlock(&priv->mutex);
7559                 return;
7560         }
7561
7562         /* we are restarting association process
7563          * clear RXON_FILTER_ASSOC_MSK bit
7564         */
7565         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7566                 iwl3945_scan_cancel_timeout(priv, 100);
7567                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7568                 iwl3945_commit_rxon(priv);
7569         }
7570
7571         /* Per mac80211.h: This is only used in IBSS mode... */
7572         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7573
7574                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7575                 mutex_unlock(&priv->mutex);
7576                 return;
7577         }
7578
7579         priv->only_active_channel = 0;
7580
7581         iwl3945_set_rate(priv);
7582
7583         mutex_unlock(&priv->mutex);
7584
7585         IWL_DEBUG_MAC80211("leave\n");
7586
7587 }
7588
7589 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7590                                  struct ieee80211_tx_control *control)
7591 {
7592         struct iwl3945_priv *priv = hw->priv;
7593         unsigned long flags;
7594
7595         mutex_lock(&priv->mutex);
7596         IWL_DEBUG_MAC80211("enter\n");
7597
7598         if (!iwl3945_is_ready_rf(priv)) {
7599                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7600                 mutex_unlock(&priv->mutex);
7601                 return -EIO;
7602         }
7603
7604         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7605                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7606                 mutex_unlock(&priv->mutex);
7607                 return -EIO;
7608         }
7609
7610         spin_lock_irqsave(&priv->lock, flags);
7611
7612         if (priv->ibss_beacon)
7613                 dev_kfree_skb(priv->ibss_beacon);
7614
7615         priv->ibss_beacon = skb;
7616
7617         priv->assoc_id = 0;
7618
7619         IWL_DEBUG_MAC80211("leave\n");
7620         spin_unlock_irqrestore(&priv->lock, flags);
7621
7622 #ifdef CONFIG_IWL3945_QOS
7623         iwl3945_reset_qos(priv);
7624 #endif
7625
7626         queue_work(priv->workqueue, &priv->post_associate.work);
7627
7628         mutex_unlock(&priv->mutex);
7629
7630         return 0;
7631 }
7632
7633 /*****************************************************************************
7634  *
7635  * sysfs attributes
7636  *
7637  *****************************************************************************/
7638
7639 #ifdef CONFIG_IWL3945_DEBUG
7640
7641 /*
7642  * The following adds a new attribute to the sysfs representation
7643  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7644  * used for controlling the debug level.
7645  *
7646  * See the level definitions in iwl for details.
7647  */
7648
7649 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7650 {
7651         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7652 }
7653 static ssize_t store_debug_level(struct device_driver *d,
7654                                  const char *buf, size_t count)
7655 {
7656         char *p = (char *)buf;
7657         u32 val;
7658
7659         val = simple_strtoul(p, &p, 0);
7660         if (p == buf)
7661                 printk(KERN_INFO DRV_NAME
7662                        ": %s is not in hex or decimal form.\n", buf);
7663         else
7664                 iwl3945_debug_level = val;
7665
7666         return strnlen(buf, count);
7667 }
7668
7669 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7670                    show_debug_level, store_debug_level);
7671
7672 #endif /* CONFIG_IWL3945_DEBUG */
7673
7674 static ssize_t show_rf_kill(struct device *d,
7675                             struct device_attribute *attr, char *buf)
7676 {
7677         /*
7678          * 0 - RF kill not enabled
7679          * 1 - SW based RF kill active (sysfs)
7680          * 2 - HW based RF kill active
7681          * 3 - Both HW and SW based RF kill active
7682          */
7683         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7684         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7685                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7686
7687         return sprintf(buf, "%i\n", val);
7688 }
7689
7690 static ssize_t store_rf_kill(struct device *d,
7691                              struct device_attribute *attr,
7692                              const char *buf, size_t count)
7693 {
7694         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7695
7696         mutex_lock(&priv->mutex);
7697         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7698         mutex_unlock(&priv->mutex);
7699
7700         return count;
7701 }
7702
7703 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7704
7705 static ssize_t show_temperature(struct device *d,
7706                                 struct device_attribute *attr, char *buf)
7707 {
7708         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7709
7710         if (!iwl3945_is_alive(priv))
7711                 return -EAGAIN;
7712
7713         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7714 }
7715
7716 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7717
7718 static ssize_t show_rs_window(struct device *d,
7719                               struct device_attribute *attr,
7720                               char *buf)
7721 {
7722         struct iwl3945_priv *priv = d->driver_data;
7723         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7724 }
7725 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7726
7727 static ssize_t show_tx_power(struct device *d,
7728                              struct device_attribute *attr, char *buf)
7729 {
7730         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7731         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7732 }
7733
7734 static ssize_t store_tx_power(struct device *d,
7735                               struct device_attribute *attr,
7736                               const char *buf, size_t count)
7737 {
7738         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7739         char *p = (char *)buf;
7740         u32 val;
7741
7742         val = simple_strtoul(p, &p, 10);
7743         if (p == buf)
7744                 printk(KERN_INFO DRV_NAME
7745                        ": %s is not in decimal form.\n", buf);
7746         else
7747                 iwl3945_hw_reg_set_txpower(priv, val);
7748
7749         return count;
7750 }
7751
7752 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7753
7754 static ssize_t show_flags(struct device *d,
7755                           struct device_attribute *attr, char *buf)
7756 {
7757         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7758
7759         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7760 }
7761
7762 static ssize_t store_flags(struct device *d,
7763                            struct device_attribute *attr,
7764                            const char *buf, size_t count)
7765 {
7766         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7767         u32 flags = simple_strtoul(buf, NULL, 0);
7768
7769         mutex_lock(&priv->mutex);
7770         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7771                 /* Cancel any currently running scans... */
7772                 if (iwl3945_scan_cancel_timeout(priv, 100))
7773                         IWL_WARNING("Could not cancel scan.\n");
7774                 else {
7775                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7776                                        flags);
7777                         priv->staging_rxon.flags = cpu_to_le32(flags);
7778                         iwl3945_commit_rxon(priv);
7779                 }
7780         }
7781         mutex_unlock(&priv->mutex);
7782
7783         return count;
7784 }
7785
7786 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7787
7788 static ssize_t show_filter_flags(struct device *d,
7789                                  struct device_attribute *attr, char *buf)
7790 {
7791         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7792
7793         return sprintf(buf, "0x%04X\n",
7794                 le32_to_cpu(priv->active_rxon.filter_flags));
7795 }
7796
7797 static ssize_t store_filter_flags(struct device *d,
7798                                   struct device_attribute *attr,
7799                                   const char *buf, size_t count)
7800 {
7801         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7802         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7803
7804         mutex_lock(&priv->mutex);
7805         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7806                 /* Cancel any currently running scans... */
7807                 if (iwl3945_scan_cancel_timeout(priv, 100))
7808                         IWL_WARNING("Could not cancel scan.\n");
7809                 else {
7810                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7811                                        "0x%04X\n", filter_flags);
7812                         priv->staging_rxon.filter_flags =
7813                                 cpu_to_le32(filter_flags);
7814                         iwl3945_commit_rxon(priv);
7815                 }
7816         }
7817         mutex_unlock(&priv->mutex);
7818
7819         return count;
7820 }
7821
7822 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7823                    store_filter_flags);
7824
7825 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7826
7827 static ssize_t show_measurement(struct device *d,
7828                                 struct device_attribute *attr, char *buf)
7829 {
7830         struct iwl3945_priv *priv = dev_get_drvdata(d);
7831         struct iwl3945_spectrum_notification measure_report;
7832         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7833         u8 *data = (u8 *) & measure_report;
7834         unsigned long flags;
7835
7836         spin_lock_irqsave(&priv->lock, flags);
7837         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7838                 spin_unlock_irqrestore(&priv->lock, flags);
7839                 return 0;
7840         }
7841         memcpy(&measure_report, &priv->measure_report, size);
7842         priv->measurement_status = 0;
7843         spin_unlock_irqrestore(&priv->lock, flags);
7844
7845         while (size && (PAGE_SIZE - len)) {
7846                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7847                                    PAGE_SIZE - len, 1);
7848                 len = strlen(buf);
7849                 if (PAGE_SIZE - len)
7850                         buf[len++] = '\n';
7851
7852                 ofs += 16;
7853                 size -= min(size, 16U);
7854         }
7855
7856         return len;
7857 }
7858
7859 static ssize_t store_measurement(struct device *d,
7860                                  struct device_attribute *attr,
7861                                  const char *buf, size_t count)
7862 {
7863         struct iwl3945_priv *priv = dev_get_drvdata(d);
7864         struct ieee80211_measurement_params params = {
7865                 .channel = le16_to_cpu(priv->active_rxon.channel),
7866                 .start_time = cpu_to_le64(priv->last_tsf),
7867                 .duration = cpu_to_le16(1),
7868         };
7869         u8 type = IWL_MEASURE_BASIC;
7870         u8 buffer[32];
7871         u8 channel;
7872
7873         if (count) {
7874                 char *p = buffer;
7875                 strncpy(buffer, buf, min(sizeof(buffer), count));
7876                 channel = simple_strtoul(p, NULL, 0);
7877                 if (channel)
7878                         params.channel = channel;
7879
7880                 p = buffer;
7881                 while (*p && *p != ' ')
7882                         p++;
7883                 if (*p)
7884                         type = simple_strtoul(p + 1, NULL, 0);
7885         }
7886
7887         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7888                        "channel %d (for '%s')\n", type, params.channel, buf);
7889         iwl3945_get_measurement(priv, &params, type);
7890
7891         return count;
7892 }
7893
7894 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7895                    show_measurement, store_measurement);
7896 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7897
7898 static ssize_t show_rate(struct device *d,
7899                          struct device_attribute *attr, char *buf)
7900 {
7901         struct iwl3945_priv *priv = dev_get_drvdata(d);
7902         unsigned long flags;
7903         int i;
7904
7905         spin_lock_irqsave(&priv->sta_lock, flags);
7906         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7907                 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7908         else
7909                 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7910         spin_unlock_irqrestore(&priv->sta_lock, flags);
7911
7912         i = iwl3945_rate_index_from_plcp(i);
7913         if (i == -1)
7914                 return sprintf(buf, "0\n");
7915
7916         return sprintf(buf, "%d%s\n",
7917                        (iwl3945_rates[i].ieee >> 1),
7918                        (iwl3945_rates[i].ieee & 0x1) ? ".5" : "");
7919 }
7920
7921 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7922
7923 static ssize_t store_retry_rate(struct device *d,
7924                                 struct device_attribute *attr,
7925                                 const char *buf, size_t count)
7926 {
7927         struct iwl3945_priv *priv = dev_get_drvdata(d);
7928
7929         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7930         if (priv->retry_rate <= 0)
7931                 priv->retry_rate = 1;
7932
7933         return count;
7934 }
7935
7936 static ssize_t show_retry_rate(struct device *d,
7937                                struct device_attribute *attr, char *buf)
7938 {
7939         struct iwl3945_priv *priv = dev_get_drvdata(d);
7940         return sprintf(buf, "%d", priv->retry_rate);
7941 }
7942
7943 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7944                    store_retry_rate);
7945
7946 static ssize_t store_power_level(struct device *d,
7947                                  struct device_attribute *attr,
7948                                  const char *buf, size_t count)
7949 {
7950         struct iwl3945_priv *priv = dev_get_drvdata(d);
7951         int rc;
7952         int mode;
7953
7954         mode = simple_strtoul(buf, NULL, 0);
7955         mutex_lock(&priv->mutex);
7956
7957         if (!iwl3945_is_ready(priv)) {
7958                 rc = -EAGAIN;
7959                 goto out;
7960         }
7961
7962         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7963                 mode = IWL_POWER_AC;
7964         else
7965                 mode |= IWL_POWER_ENABLED;
7966
7967         if (mode != priv->power_mode) {
7968                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7969                 if (rc) {
7970                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7971                         goto out;
7972                 }
7973                 priv->power_mode = mode;
7974         }
7975
7976         rc = count;
7977
7978  out:
7979         mutex_unlock(&priv->mutex);
7980         return rc;
7981 }
7982
7983 #define MAX_WX_STRING 80
7984
7985 /* Values are in microsecond */
7986 static const s32 timeout_duration[] = {
7987         350000,
7988         250000,
7989         75000,
7990         37000,
7991         25000,
7992 };
7993 static const s32 period_duration[] = {
7994         400000,
7995         700000,
7996         1000000,
7997         1000000,
7998         1000000
7999 };
8000
8001 static ssize_t show_power_level(struct device *d,
8002                                 struct device_attribute *attr, char *buf)
8003 {
8004         struct iwl3945_priv *priv = dev_get_drvdata(d);
8005         int level = IWL_POWER_LEVEL(priv->power_mode);
8006         char *p = buf;
8007
8008         p += sprintf(p, "%d ", level);
8009         switch (level) {
8010         case IWL_POWER_MODE_CAM:
8011         case IWL_POWER_AC:
8012                 p += sprintf(p, "(AC)");
8013                 break;
8014         case IWL_POWER_BATTERY:
8015                 p += sprintf(p, "(BATTERY)");
8016                 break;
8017         default:
8018                 p += sprintf(p,
8019                              "(Timeout %dms, Period %dms)",
8020                              timeout_duration[level - 1] / 1000,
8021                              period_duration[level - 1] / 1000);
8022         }
8023
8024         if (!(priv->power_mode & IWL_POWER_ENABLED))
8025                 p += sprintf(p, " OFF\n");
8026         else
8027                 p += sprintf(p, " \n");
8028
8029         return (p - buf + 1);
8030
8031 }
8032
8033 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8034                    store_power_level);
8035
8036 static ssize_t show_channels(struct device *d,
8037                              struct device_attribute *attr, char *buf)
8038 {
8039         /* all this shit doesn't belong into sysfs anyway */
8040         return 0;
8041 }
8042
8043 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8044
8045 static ssize_t show_statistics(struct device *d,
8046                                struct device_attribute *attr, char *buf)
8047 {
8048         struct iwl3945_priv *priv = dev_get_drvdata(d);
8049         u32 size = sizeof(struct iwl3945_notif_statistics);
8050         u32 len = 0, ofs = 0;
8051         u8 *data = (u8 *) & priv->statistics;
8052         int rc = 0;
8053
8054         if (!iwl3945_is_alive(priv))
8055                 return -EAGAIN;
8056
8057         mutex_lock(&priv->mutex);
8058         rc = iwl3945_send_statistics_request(priv);
8059         mutex_unlock(&priv->mutex);
8060
8061         if (rc) {
8062                 len = sprintf(buf,
8063                               "Error sending statistics request: 0x%08X\n", rc);
8064                 return len;
8065         }
8066
8067         while (size && (PAGE_SIZE - len)) {
8068                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8069                                    PAGE_SIZE - len, 1);
8070                 len = strlen(buf);
8071                 if (PAGE_SIZE - len)
8072                         buf[len++] = '\n';
8073
8074                 ofs += 16;
8075                 size -= min(size, 16U);
8076         }
8077
8078         return len;
8079 }
8080
8081 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8082
8083 static ssize_t show_antenna(struct device *d,
8084                             struct device_attribute *attr, char *buf)
8085 {
8086         struct iwl3945_priv *priv = dev_get_drvdata(d);
8087
8088         if (!iwl3945_is_alive(priv))
8089                 return -EAGAIN;
8090
8091         return sprintf(buf, "%d\n", priv->antenna);
8092 }
8093
8094 static ssize_t store_antenna(struct device *d,
8095                              struct device_attribute *attr,
8096                              const char *buf, size_t count)
8097 {
8098         int ant;
8099         struct iwl3945_priv *priv = dev_get_drvdata(d);
8100
8101         if (count == 0)
8102                 return 0;
8103
8104         if (sscanf(buf, "%1i", &ant) != 1) {
8105                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8106                 return count;
8107         }
8108
8109         if ((ant >= 0) && (ant <= 2)) {
8110                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8111                 priv->antenna = (enum iwl3945_antenna)ant;
8112         } else
8113                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8114
8115
8116         return count;
8117 }
8118
8119 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8120
8121 static ssize_t show_status(struct device *d,
8122                            struct device_attribute *attr, char *buf)
8123 {
8124         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
8125         if (!iwl3945_is_alive(priv))
8126                 return -EAGAIN;
8127         return sprintf(buf, "0x%08x\n", (int)priv->status);
8128 }
8129
8130 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8131
8132 static ssize_t dump_error_log(struct device *d,
8133                               struct device_attribute *attr,
8134                               const char *buf, size_t count)
8135 {
8136         char *p = (char *)buf;
8137
8138         if (p[0] == '1')
8139                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
8140
8141         return strnlen(buf, count);
8142 }
8143
8144 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8145
8146 static ssize_t dump_event_log(struct device *d,
8147                               struct device_attribute *attr,
8148                               const char *buf, size_t count)
8149 {
8150         char *p = (char *)buf;
8151
8152         if (p[0] == '1')
8153                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
8154
8155         return strnlen(buf, count);
8156 }
8157
8158 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8159
8160 /*****************************************************************************
8161  *
8162  * driver setup and teardown
8163  *
8164  *****************************************************************************/
8165
8166 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
8167 {
8168         priv->workqueue = create_workqueue(DRV_NAME);
8169
8170         init_waitqueue_head(&priv->wait_command_queue);
8171
8172         INIT_WORK(&priv->up, iwl3945_bg_up);
8173         INIT_WORK(&priv->restart, iwl3945_bg_restart);
8174         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
8175         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
8176         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
8177         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
8178         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
8179         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
8180         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
8181         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
8182         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
8183         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
8184
8185         iwl3945_hw_setup_deferred_work(priv);
8186
8187         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8188                      iwl3945_irq_tasklet, (unsigned long)priv);
8189 }
8190
8191 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
8192 {
8193         iwl3945_hw_cancel_deferred_work(priv);
8194
8195         cancel_delayed_work_sync(&priv->init_alive_start);
8196         cancel_delayed_work(&priv->scan_check);
8197         cancel_delayed_work(&priv->alive_start);
8198         cancel_delayed_work(&priv->post_associate);
8199         cancel_work_sync(&priv->beacon_update);
8200 }
8201
8202 static struct attribute *iwl3945_sysfs_entries[] = {
8203         &dev_attr_antenna.attr,
8204         &dev_attr_channels.attr,
8205         &dev_attr_dump_errors.attr,
8206         &dev_attr_dump_events.attr,
8207         &dev_attr_flags.attr,
8208         &dev_attr_filter_flags.attr,
8209 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
8210         &dev_attr_measurement.attr,
8211 #endif
8212         &dev_attr_power_level.attr,
8213         &dev_attr_rate.attr,
8214         &dev_attr_retry_rate.attr,
8215         &dev_attr_rf_kill.attr,
8216         &dev_attr_rs_window.attr,
8217         &dev_attr_statistics.attr,
8218         &dev_attr_status.attr,
8219         &dev_attr_temperature.attr,
8220         &dev_attr_tx_power.attr,
8221
8222         NULL
8223 };
8224
8225 static struct attribute_group iwl3945_attribute_group = {
8226         .name = NULL,           /* put in device directory */
8227         .attrs = iwl3945_sysfs_entries,
8228 };
8229
8230 static struct ieee80211_ops iwl3945_hw_ops = {
8231         .tx = iwl3945_mac_tx,
8232         .start = iwl3945_mac_start,
8233         .stop = iwl3945_mac_stop,
8234         .add_interface = iwl3945_mac_add_interface,
8235         .remove_interface = iwl3945_mac_remove_interface,
8236         .config = iwl3945_mac_config,
8237         .config_interface = iwl3945_mac_config_interface,
8238         .configure_filter = iwl3945_configure_filter,
8239         .set_key = iwl3945_mac_set_key,
8240         .get_stats = iwl3945_mac_get_stats,
8241         .get_tx_stats = iwl3945_mac_get_tx_stats,
8242         .conf_tx = iwl3945_mac_conf_tx,
8243         .get_tsf = iwl3945_mac_get_tsf,
8244         .reset_tsf = iwl3945_mac_reset_tsf,
8245         .beacon_update = iwl3945_mac_beacon_update,
8246         .hw_scan = iwl3945_mac_hw_scan
8247 };
8248
8249 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8250 {
8251         int err = 0;
8252         u32 pci_id;
8253         struct iwl3945_priv *priv;
8254         struct ieee80211_hw *hw;
8255         int i;
8256         DECLARE_MAC_BUF(mac);
8257
8258         /* Disabling hardware scan means that mac80211 will perform scans
8259          * "the hard way", rather than using device's scan. */
8260         if (iwl3945_param_disable_hw_scan) {
8261                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8262                 iwl3945_hw_ops.hw_scan = NULL;
8263         }
8264
8265         if ((iwl3945_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8266             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8267                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8268                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8269                 err = -EINVAL;
8270                 goto out;
8271         }
8272
8273         /* mac80211 allocates memory for this device instance, including
8274          *   space for this driver's private structure */
8275         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
8276         if (hw == NULL) {
8277                 IWL_ERROR("Can not allocate network device\n");
8278                 err = -ENOMEM;
8279                 goto out;
8280         }
8281         SET_IEEE80211_DEV(hw, &pdev->dev);
8282
8283         hw->rate_control_algorithm = "iwl-3945-rs";
8284
8285         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8286         priv = hw->priv;
8287         priv->hw = hw;
8288
8289         priv->pci_dev = pdev;
8290
8291         /* Select antenna (may be helpful if only one antenna is connected) */
8292         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
8293 #ifdef CONFIG_IWL3945_DEBUG
8294         iwl3945_debug_level = iwl3945_param_debug;
8295         atomic_set(&priv->restrict_refcnt, 0);
8296 #endif
8297         priv->retry_rate = 1;
8298
8299         priv->ibss_beacon = NULL;
8300
8301         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8302          *   the range of signal quality values that we'll provide.
8303          * Negative values for level/noise indicate that we'll provide dBm.
8304          * For WE, at least, non-0 values here *enable* display of values
8305          *   in app (iwconfig). */
8306         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8307         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8308         hw->max_signal = 100;   /* link quality indication (%) */
8309
8310         /* Tell mac80211 our Tx characteristics */
8311         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8312
8313         /* 4 EDCA QOS priorities */
8314         hw->queues = 4;
8315
8316         spin_lock_init(&priv->lock);
8317         spin_lock_init(&priv->power_data.lock);
8318         spin_lock_init(&priv->sta_lock);
8319         spin_lock_init(&priv->hcmd_lock);
8320
8321         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8322                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8323
8324         INIT_LIST_HEAD(&priv->free_frames);
8325
8326         mutex_init(&priv->mutex);
8327         if (pci_enable_device(pdev)) {
8328                 err = -ENODEV;
8329                 goto out_ieee80211_free_hw;
8330         }
8331
8332         pci_set_master(pdev);
8333
8334         /* Clear the driver's (not device's) station table */
8335         iwl3945_clear_stations_table(priv);
8336
8337         priv->data_retry_limit = -1;
8338         priv->ieee_channels = NULL;
8339         priv->ieee_rates = NULL;
8340         priv->band = IEEE80211_BAND_2GHZ;
8341
8342         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8343         if (!err)
8344                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8345         if (err) {
8346                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8347                 goto out_pci_disable_device;
8348         }
8349
8350         pci_set_drvdata(pdev, priv);
8351         err = pci_request_regions(pdev, DRV_NAME);
8352         if (err)
8353                 goto out_pci_disable_device;
8354
8355         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8356          * PCI Tx retries from interfering with C3 CPU state */
8357         pci_write_config_byte(pdev, 0x41, 0x00);
8358
8359         priv->hw_base = pci_iomap(pdev, 0, 0);
8360         if (!priv->hw_base) {
8361                 err = -ENODEV;
8362                 goto out_pci_release_regions;
8363         }
8364
8365         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8366                         (unsigned long long) pci_resource_len(pdev, 0));
8367         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8368
8369         /* Initialize module parameter values here */
8370
8371         /* Disable radio (SW RF KILL) via parameter when loading driver */
8372         if (iwl3945_param_disable) {
8373                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8374                 IWL_DEBUG_INFO("Radio disabled.\n");
8375         }
8376
8377         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8378
8379         pci_id =
8380             (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8381
8382         switch (pci_id) {
8383         case 0x42221005:        /* 0x4222 0x8086 0x1005 is BG SKU */
8384         case 0x42221034:        /* 0x4222 0x8086 0x1034 is BG SKU */
8385         case 0x42271014:        /* 0x4227 0x8086 0x1014 is BG SKU */
8386         case 0x42221044:        /* 0x4222 0x8086 0x1044 is BG SKU */
8387                 priv->is_abg = 0;
8388                 break;
8389
8390         /*
8391          * Rest are assumed ABG SKU -- if this is not the
8392          * case then the card will get the wrong 'Detected'
8393          * line in the kernel log however the code that
8394          * initializes the GEO table will detect no A-band
8395          * channels and remove the is_abg mask.
8396          */
8397         default:
8398                 priv->is_abg = 1;
8399                 break;
8400         }
8401
8402         printk(KERN_INFO DRV_NAME
8403                ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8404                priv->is_abg ? "A" : "");
8405
8406         /* Device-specific setup */
8407         if (iwl3945_hw_set_hw_setting(priv)) {
8408                 IWL_ERROR("failed to set hw settings\n");
8409                 goto out_iounmap;
8410         }
8411
8412 #ifdef CONFIG_IWL3945_QOS
8413         if (iwl3945_param_qos_enable)
8414                 priv->qos_data.qos_enable = 1;
8415
8416         iwl3945_reset_qos(priv);
8417
8418         priv->qos_data.qos_active = 0;
8419         priv->qos_data.qos_cap.val = 0;
8420 #endif /* CONFIG_IWL3945_QOS */
8421
8422         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8423         iwl3945_setup_deferred_work(priv);
8424         iwl3945_setup_rx_handlers(priv);
8425
8426         priv->rates_mask = IWL_RATES_MASK;
8427         /* If power management is turned on, default to AC mode */
8428         priv->power_mode = IWL_POWER_AC;
8429         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8430
8431         iwl3945_disable_interrupts(priv);
8432
8433         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8434         if (err) {
8435                 IWL_ERROR("failed to create sysfs device attributes\n");
8436                 goto out_release_irq;
8437         }
8438
8439         /* nic init */
8440         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8441                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8442
8443         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8444         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8445                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8446                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8447         if (err < 0) {
8448                 IWL_DEBUG_INFO("Failed to init the card\n");
8449                 goto out_remove_sysfs;
8450         }
8451         /* Read the EEPROM */
8452         err = iwl3945_eeprom_init(priv);
8453         if (err) {
8454                 IWL_ERROR("Unable to init EEPROM\n");
8455                 goto out_remove_sysfs;
8456         }
8457         /* MAC Address location in EEPROM same for 3945/4965 */
8458         get_eeprom_mac(priv, priv->mac_addr);
8459         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8460         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8461
8462         err = iwl3945_init_channel_map(priv);
8463         if (err) {
8464                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8465                 goto out_remove_sysfs;
8466         }
8467
8468         err = iwl3945_init_geos(priv);
8469         if (err) {
8470                 IWL_ERROR("initializing geos failed: %d\n", err);
8471                 goto out_free_channel_map;
8472         }
8473
8474         iwl3945_rate_control_register(priv->hw);
8475         err = ieee80211_register_hw(priv->hw);
8476         if (err) {
8477                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8478                 goto out_free_geos;
8479         }
8480
8481         priv->hw->conf.beacon_int = 100;
8482         priv->mac80211_registered = 1;
8483         pci_save_state(pdev);
8484         pci_disable_device(pdev);
8485
8486         return 0;
8487
8488  out_free_geos:
8489         iwl3945_free_geos(priv);
8490  out_free_channel_map:
8491         iwl3945_free_channel_map(priv);
8492  out_remove_sysfs:
8493         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8494
8495  out_release_irq:
8496         destroy_workqueue(priv->workqueue);
8497         priv->workqueue = NULL;
8498         iwl3945_unset_hw_setting(priv);
8499
8500  out_iounmap:
8501         pci_iounmap(pdev, priv->hw_base);
8502  out_pci_release_regions:
8503         pci_release_regions(pdev);
8504  out_pci_disable_device:
8505         pci_disable_device(pdev);
8506         pci_set_drvdata(pdev, NULL);
8507  out_ieee80211_free_hw:
8508         ieee80211_free_hw(priv->hw);
8509  out:
8510         return err;
8511 }
8512
8513 static void iwl3945_pci_remove(struct pci_dev *pdev)
8514 {
8515         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8516         struct list_head *p, *q;
8517         int i;
8518
8519         if (!priv)
8520                 return;
8521
8522         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8523
8524         set_bit(STATUS_EXIT_PENDING, &priv->status);
8525
8526         iwl3945_down(priv);
8527
8528         /* Free MAC hash list for ADHOC */
8529         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8530                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8531                         list_del(p);
8532                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8533                 }
8534         }
8535
8536         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8537
8538         iwl3945_dealloc_ucode_pci(priv);
8539
8540         if (priv->rxq.bd)
8541                 iwl3945_rx_queue_free(priv, &priv->rxq);
8542         iwl3945_hw_txq_ctx_free(priv);
8543
8544         iwl3945_unset_hw_setting(priv);
8545         iwl3945_clear_stations_table(priv);
8546
8547         if (priv->mac80211_registered) {
8548                 ieee80211_unregister_hw(priv->hw);
8549                 iwl3945_rate_control_unregister(priv->hw);
8550         }
8551
8552         /*netif_stop_queue(dev); */
8553         flush_workqueue(priv->workqueue);
8554
8555         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8556          * priv->workqueue... so we can't take down the workqueue
8557          * until now... */
8558         destroy_workqueue(priv->workqueue);
8559         priv->workqueue = NULL;
8560
8561         pci_iounmap(pdev, priv->hw_base);
8562         pci_release_regions(pdev);
8563         pci_disable_device(pdev);
8564         pci_set_drvdata(pdev, NULL);
8565
8566         iwl3945_free_channel_map(priv);
8567         iwl3945_free_geos(priv);
8568
8569         if (priv->ibss_beacon)
8570                 dev_kfree_skb(priv->ibss_beacon);
8571
8572         ieee80211_free_hw(priv->hw);
8573 }
8574
8575 #ifdef CONFIG_PM
8576
8577 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8578 {
8579         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8580
8581         if (priv->is_open) {
8582                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8583                 iwl3945_mac_stop(priv->hw);
8584                 priv->is_open = 1;
8585         }
8586
8587         pci_set_power_state(pdev, PCI_D3hot);
8588
8589         return 0;
8590 }
8591
8592 static int iwl3945_pci_resume(struct pci_dev *pdev)
8593 {
8594         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8595
8596         pci_set_power_state(pdev, PCI_D0);
8597
8598         if (priv->is_open)
8599                 iwl3945_mac_start(priv->hw);
8600
8601         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8602         return 0;
8603 }
8604
8605 #endif /* CONFIG_PM */
8606
8607 /*****************************************************************************
8608  *
8609  * driver and module entry point
8610  *
8611  *****************************************************************************/
8612
8613 static struct pci_driver iwl3945_driver = {
8614         .name = DRV_NAME,
8615         .id_table = iwl3945_hw_card_ids,
8616         .probe = iwl3945_pci_probe,
8617         .remove = __devexit_p(iwl3945_pci_remove),
8618 #ifdef CONFIG_PM
8619         .suspend = iwl3945_pci_suspend,
8620         .resume = iwl3945_pci_resume,
8621 #endif
8622 };
8623
8624 static int __init iwl3945_init(void)
8625 {
8626
8627         int ret;
8628         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8629         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8630         ret = pci_register_driver(&iwl3945_driver);
8631         if (ret) {
8632                 IWL_ERROR("Unable to initialize PCI module\n");
8633                 return ret;
8634         }
8635 #ifdef CONFIG_IWL3945_DEBUG
8636         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8637         if (ret) {
8638                 IWL_ERROR("Unable to create driver sysfs file\n");
8639                 pci_unregister_driver(&iwl3945_driver);
8640                 return ret;
8641         }
8642 #endif
8643
8644         return ret;
8645 }
8646
8647 static void __exit iwl3945_exit(void)
8648 {
8649 #ifdef CONFIG_IWL3945_DEBUG
8650         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8651 #endif
8652         pci_unregister_driver(&iwl3945_driver);
8653 }
8654
8655 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8656 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8657 module_param_named(disable, iwl3945_param_disable, int, 0444);
8658 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8659 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8660 MODULE_PARM_DESC(hwcrypto,
8661                  "using hardware crypto engine (default 0 [software])\n");
8662 module_param_named(debug, iwl3945_param_debug, int, 0444);
8663 MODULE_PARM_DESC(debug, "debug output mask");
8664 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8665 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8666
8667 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8668 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8669
8670 /* QoS */
8671 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8672 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8673
8674 module_exit(iwl3945_exit);
8675 module_init(iwl3945_init);